Helm Chart Configuration

Configuration (Values)

The chart is highly customizable using Helm configuration values. Each value has a sane default tuned for an optimal getting started experience with Consul. Before going into production, please review the parameters below and consider if they’re appropriate for your deployment.

  • global - Holds values that affect multiple components of the chart.

    • enabled (boolean: true) - The main enabled/disabled setting. If true, servers, clients, Consul DNS and the Consul UI will be enabled. Each component can override this default via its component-specific “enabled” config. If false, no components will be installed by default and per-component opt-in is required, such as by setting server.enabled to true.

    • name (string: null) - Set the prefix used for all resources in the Helm chart. If not set, the prefix will be <helm release name>-consul.

    • domain (string: consul) - The domain Consul will answer DNS queries for (see -domain (https://consul.io/docs/agent/options#_domain)) and the domain services synced from Consul into Kubernetes will have, e.g. service-name.service.consul.

    • image (string: hashicorp/consul:<latest version>) - The name (and tag) of the Consul Docker image for clients and servers. This can be overridden per component. This should be pinned to a specific version tag, otherwise you may inadvertently upgrade your Consul version.

      Examples:

      1. # Consul 1.5.0
      2. image: "consul:1.5.0"
      3. # Consul Enterprise 1.5.0
      4. image: "hashicorp/consul-enterprise:1.5.0-ent"

    • imagePullSecrets (array<map>) - Array of objects containing image pull secret names that will be applied to each service account. This can be used to reference image pull secrets if using a custom consul or consul-k8s Docker image. See https://kubernetes.io/docs/concepts/containers/images/#using-a-private-registry for reference.

      Example:

      1. imagePullSecrets:
      2.   - name: pull-secret-name
      3.   - name: pull-secret-name-2

    • imageK8S (string: hashicorp/consul-k8s:<latest version>) - The name (and tag) of the consul-k8s (https://github.com/hashicorp/consul-k8s) Docker image that is used for functionality such the catalog sync. This can be overridden per component.

    • datacenter (string: dc1) - The name of the datacenter that the agents should register as. This can’t be changed once the Consul cluster is up and running since Consul doesn’t support an automatic way to change this value currently: https://github.com/hashicorp/consul/issues/1858.

    • enablePodSecurityPolicies (boolean: false) - Controls whether pod security policies are created for the Consul components created by this chart. See https://kubernetes.io/docs/concepts/policy/pod-security-policy/.

    • gossipEncryption - Configures which Kubernetes secret to retrieve Consul’s gossip encryption key from (see -encrypt (https://consul.io/docs/agent/options#_encrypt)). If secretName or secretKey are not set, gossip encryption will not be enabled. The secret must be in the same namespace that Consul is installed into.

      The secret can be created by running:

      1. $ kubectl create secret generic consul-gossip-encryption-key --from-literal=key=$(consul keygen)

      To reference, use:

      1. global:
      2.   gossipEncryption:
      3.     secretName: consul-gossip-encryption-key
      4.     secretKey: key

      • secretName (string: "") - secretName is the name of the Kubernetes secret that holds the gossip encryption key. The secret must be in the same namespace that Consul is installed into.

      • secretKey (string: "") - secretKey is the key within the Kubernetes secret that holds the gossip encryption key.

    • tls - Enables TLS (https://learn.hashicorp.com/tutorials/consul/tls-encryption-secure) across the cluster to verify authenticity of the Consul servers and clients. Requires Consul v1.4.1+ and consul-k8s v0.16.2+

      • enabled (boolean: false) - If true, the Helm chart will enable TLS for Consul servers and clients and all consul-k8s components, as well as generate certificate authority (optional) and server and client certificates.

      • enableAutoEncrypt (boolean: false) - If true, turns on the auto-encrypt feature on clients and servers. It also switches consul-k8s components to retrieve the CA from the servers via the API. Requires Consul 1.7.1+ and consul-k8s 0.13.0

      • serverAdditionalDNSSANs (array<string>: []) - A list of additional DNS names to set as Subject Alternative Names (SANs) in the server certificate. This is useful when you need to access the Consul server(s) externally, for example, if you’re using the UI.

      • serverAdditionalIPSANs (array<string>: []) - A list of additional IP addresses to set as Subject Alternative Names (SANs) in the server certificate. This is useful when you need to access the Consul server(s) externally, for example, if you’re using the UI.

      • verify (boolean: true) - If true, verify_outgoing, verify_server_hostname, and verify_incoming_rpc will be set to true for Consul servers and clients. Set this to false to incrementally roll out TLS on an existing Consul cluster. Please see https://consul.io/docs/k8s/operations/tls-on-existing-cluster for more details.

      • httpsOnly (boolean: true) - If true, the Helm chart will configure Consul to disable the HTTP port on both clients and servers and to only accept HTTPS connections.

      • caCert - A Kubernetes secret containing the certificate of the CA to use for TLS communication within the Consul cluster. If you have generated the CA yourself with the consul CLI, you could use the following command to create the secret in Kubernetes:

        1. kubectl create secret generic consul-ca-cert \
        2.     --from-file='tls.crt=./consul-agent-ca.pem'

        • secretName (string: null) - The name of the Kubernetes secret.

        • secretKey (string: null) - The key of the Kubernetes secret.

      • caKey - A Kubernetes secret containing the private key of the CA to use for TLS communication within the Consul cluster. If you have generated the CA yourself with the consul CLI, you could use the following command to create the secret in Kubernetes:

        1. kubectl create secret generic consul-ca-key \
        2.     --from-file='tls.key=./consul-agent-ca-key.pem'

        Note that we need the CA key so that we can generate server and client certificates. It is particularly important for the client certificates since they need to have host IPs as Subject Alternative Names. In the future, we may support bringing your own server certificates.

        • secretName (string: null) - The name of the Kubernetes secret.

        • secretKey (string: null) - The key of the Kubernetes secret.

    • enableConsulNamespaces (boolean: false) -

      Enterprise

      enableConsulNamespaces indicates that you are running Consul Enterprise v1.7+ with a valid Consul Enterprise license and would like to make use of configuration beyond registering everything into the default Consul namespace. Requires consul-k8s v0.12+. Additional configuration options are found in the consulNamespaces section of both the catalog sync and connect injector.

    • acls - Configure ACLs.

      • manageSystemACLs (boolean: false) - If true, the Helm chart will automatically manage ACL tokens and policies for all Consul and consul-k8s components. This requires Consul >= 1.4 and consul-k8s >= 0.14.0.

      • bootstrapToken - A Kubernetes secret containing the bootstrap token to use for creating policies and tokens for all Consul and consul-k8s components. If set, we will skip ACL bootstrapping of the servers and will only initialize ACLs for the Consul clients and consul-k8s system components. Requires consul-k8s >= 0.14.0.

        • secretName (string: null) - The name of the Kubernetes secret.

        • secretKey (string: null) - The key of the Kubernetes secret.

      • createReplicationToken (boolean: false) - If true, an ACL token will be created that can be used in secondary datacenters for replication. This should only be set to true in the primary datacenter since the replication token must be created from that datacenter. In secondary datacenters, the secret needs to be imported from the primary datacenter and referenced via global.acls.replicationToken. Requires consul-k8s >= 0.13.0.

      • replicationToken - replicationToken references a secret containing the replication ACL token. This token will be used by secondary datacenters to perform ACL replication and create ACL tokens and policies. This value is ignored if bootstrapToken is also set. Requires consul-k8s >= 0.13.0.

        • secretName (string: null) - The name of the Kubernetes secret.

        • secretKey (string: null) - The key of the Kubernetes secret.

    • federation - Configure federation.

      • enabled (boolean: false) - If enabled, this datacenter will be federation-capable. Only federation via mesh gateways is supported. Mesh gateways and servers will be configured to allow federation. Requires global.tls.enabled, meshGateway.enabled and connectInject.enabled to be true. Requires Consul 1.8+.

      • createFederationSecret (boolean: false) - If true, the chart will create a Kubernetes secret that can be imported into secondary datacenters so they can federate with this datacenter. The secret contains all the information secondary datacenters need to contact and authenticate with this datacenter. This should only be set to true in your primary datacenter. The secret name is <global.name>-federation (if setting global.name), otherwise <helm-release-name>-consul-federation. Requires consul-k8s 0.15.0+.

    • metrics - Configures metrics for Consul service mesh

      • enabled (boolean: false) - Configures the Helm chart’s components to expose Prometheus metrics for the Consul service mesh. By default this includes gateway metrics and sidecar metrics.

      • enableAgentMetrics (boolean: false) - Configures consul agent metrics. Only applicable if global.metrics.enabled is true.

      • agentMetricsRetentionTime (string: 1m) - Configures the retention time for metrics in Consul clients and servers. This must be greater than 0 for Consul clients and servers to expose any metrics at all. Only applicable if global.metrics.enabled is true.

      • enableGatewayMetrics (boolean: true) - If true, mesh, terminating, and ingress gateways will expose their Envoy metrics on port 20200 at the /metrics path and all gateway pods will have Prometheus scrape annotations. Only applicable if global.metrics.enabled is true.

    • consulSidecarContainer (map) - The consul sidecar ensures the Consul services are always registered with their local Consul clients and is used by the ingress/terminating/mesh gateways as well as with every Connect-injected service.

    • imageEnvoy (string: envoyproxy/envoy-alpine:<latest supported version>) - The name (and tag) of the Envoy Docker image used for the connect-injected sidecar proxies and mesh, terminating, and ingress gateways. See https://www.consul.io/docs/connect/proxies/envoy for full compatibility matrix between Consul and Envoy.

    • openshift - Configuration for running this Helm chart on the Red Hat OpenShift platform. This Helm chart currently supports OpenShift v4.x+.

      • enabled (boolean: false) - If true, the Helm chart will create necessary configuration for running its components on OpenShift.

  • server - Server, when enabled, configures a server cluster to run. This should be disabled if you plan on connecting to a Consul cluster external to the Kube cluster.

    • enabled (boolean: global.enabled) - If true, the chart will install all the resources necessary for a Consul server cluster. If you’re running Consul externally and want agents within Kubernetes to join that cluster, this should probably be false.

    • image (string: null) - The name of the Docker image (including any tag) for the containers running Consul server agents.

    • replicas (integer: 3) - The number of server agents to run. This determines the fault tolerance of the cluster. Please see the deployment table (https://consul.io/docs/internals/consensus#deployment-table) for more information.

    • bootstrapExpect (int: null) - The number of servers that are expected to be running. It defaults to server.replicas. In most cases the default should be used, however if there are more servers in this datacenter than server.replicas it might make sense to override the default. This would be the case if two kube clusters were joined into the same datacenter and each cluster ran a certain number of servers.

    • enterpriseLicense -

      Enterprise

      This value refers to a Kubernetes secret that you have created that contains your enterprise license. It is required if you are using an enterprise binary. Defining it here applies it to your cluster once a leader has been elected. If you are not using an enterprise image or if you plan to introduce the license key via another route, then set these fields to null. Note: the job to apply license runs on both Helm installs and upgrades.

      • secretName (string: null) - The name of the Kubernetes secret that holds the enterprise license. The secret must be in the same namespace that Consul is installed into.

      • secretKey (string: null) - The key within the Kubernetes secret that holds the enterprise license.

    • exposeGossipAndRPCPorts (boolean: false) - Exposes the servers’ gossip and RPC ports as hostPorts. To enable a client agent outside of the k8s cluster to join the datacenter, you would need to enable server.exposeGossipAndRPCPorts, client.exposeGossipPorts, and set server.ports.serflan.port to a port not being used on the host. Since client.exposeGossipPorts uses the hostPort 8301, server.ports.serflan.port must be set to something other than 8301.

    • ports - Configures ports for the consul servers.

      • serflan - Configures the LAN gossip port for the consul servers. If you choose to enable server.exposeGossipAndRPCPorts and client.exposeGossipPorts, that will configure the LAN gossip ports on the servers and clients to be hostPorts, so if you are running clients and servers on the same node the ports will conflict if they are both 8301. When you enable server.exposeGossipAndRPCPorts and client.exposeGossipPorts, you must change this from the default to an unused port on the host, e.g. 9301. By default the LAN gossip port is 8301 and configured as a containerPort on the consul server Pods.

        • port (integer: 8301)

    • storage (string: 10Gi) - This defines the disk size for configuring the servers’ StatefulSet storage. For dynamically provisioned storage classes, this is the desired size. For manually defined persistent volumes, this should be set to the disk size of the attached volume.

    • storageClass (string: null) - The StorageClass to use for the servers’ StatefulSet storage. It must be able to be dynamically provisioned if you want the storage to be automatically created. For example, to use local (https://kubernetes.io/docs/concepts/storage/storage-classes/#local) storage classes, the PersistentVolumeClaims would need to be manually created. A null value will use the Kubernetes cluster’s default StorageClass. If a default StorageClass does not exist, you will need to create one.

    • connect (boolean: true) - This will enable/disable Connect (https://consul.io/docs/connect). Setting this to true will not automatically secure pod communication, this setting will only enable usage of the feature. Consul will automatically initialize a new CA and set of certificates. Additional Connect settings can be configured by setting the server.extraConfig value.

    • resources (map) - The resource requests (CPU, memory, etc.) for each of the server agents. This should be a YAML map corresponding to a Kubernetes ResourceRequirements (https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/#resourcerequirements-v1-core) object. NOTE: The use of a YAML string is deprecated.

      Example:

      1. resources:
      2.   requests:
      3.     memory: '100Mi'
      4.     cpu: '100m'
      5.   limits:
      6.     memory: '100Mi'
      7.     cpu: '100m'

    • securityContext (map) - The security context for the server pods. This should be a YAML map corresponding to a Kubernetes SecurityContext object. By default, servers will run as non-root, with user ID 100 and group ID 1000, which correspond to the consul user and group created by the Consul docker image. Note: if running on OpenShift, this setting is ignored because the user and group are set automatically by the OpenShift platform.

    • updatePartition (integer: 0) - This value is used to carefully control a rolling update of Consul server agents. This value specifies the partition (https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#partitions) for performing a rolling update. Please read the linked Kubernetes documentation and https://www.consul.io/docs/k8s/upgrade#upgrading-consul-servers for more information.

    • disruptionBudget - This configures the PodDisruptionBudget (https://kubernetes.io/docs/tasks/run-application/configure-pdb/) for the server cluster.

      • enabled (boolean: true) - This will enable/disable registering a PodDisruptionBudget for the server cluster. If this is enabled, it will only register the budget so long as the server cluster is enabled.

      • maxUnavailable (integer: null) - The maximum number of unavailable pods. By default, this will be automatically computed based on the server.replicas value to be (n/2)-1. If you need to set this to 0, you will need to add a --set ‘server.disruptionBudget.maxUnavailable=0’` flag to the helm chart installation command because of a limitation in the Helm templating language.

    • extraConfig (string: {}) - A raw string of extra JSON configuration (https://consul.io/docs/agent/options) for Consul servers. This will be saved as-is into a ConfigMap that is read by the Consul server agents. This can be used to add additional configuration that isn’t directly exposed by the chart.

      Example:

      1. extraConfig: |
      2.   {
      3.     "log_level": "DEBUG"
      4.   }

      This can also be set using Helm’s --set flag using the following syntax:

      1. --set 'server.extraConfig="{"log_level": "DEBUG"}"'

    • extraVolumes (array<map>) - A list of extra volumes to mount for server agents. This is useful for bringing in extra data that can be referenced by other configurations at a well known path, such as TLS certificates or Gossip encryption keys. The value of this should be a list of objects.

      Example:

      1. extraVolumes:
      2.   - type: secret
      3.     name: consul-certs
      4.     load: false

      Each object supports the following keys:

      • type - Type of the volume, must be one of “configMap” or “secret”. Case sensitive.

      • name - Name of the configMap or secret to be mounted. This also controls the path that it is mounted to. The volume will be mounted to /consul/userconfig/<name>.

      • load - If true, then the agent will be configured to automatically load HCL/JSON configuration files from this volume with -config-dir. This defaults to false.

    • affinity (string) - This value defines the affinity (https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity) for server pods. It defaults to allowing only a single server pod on each node, which minimizes risk of the cluster becoming unusable if a node is lost. If you need to run more pods per node (for example, testing on Minikube), set this value to null.

      Example:

      1. affinity: |
      2.   podAntiAffinity:
      3.     requiredDuringSchedulingIgnoredDuringExecution:
      4.       - labelSelector:
      5.           matchLabels:
      6.             app: {{ template "consul.name" . }}
      7.             release: "{{ .Release.Name }}"
      8.             component: server
      9.       topologyKey: kubernetes.io/hostname

    • tolerations (string: "") - Toleration settings for server pods. This should be a multi-line string matching the Tolerations (https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/) array in a Pod spec.

    • nodeSelector (string: null) - This value defines nodeSelector (https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector) labels for server pod assignment, formatted as a multi-line string.

      Example:

      1. nodeSelector: |
      2.   beta.kubernetes.io/arch: amd64

    • priorityClassName (string: "") - This value references an existing Kubernetes priorityClassName (https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#pod-priority) that can be assigned to server pods.

    • extraLabels (map) - Extra labels to attach to the server pods. This should be a YAML map.

      Example:

      1. extraLabels:
      2.   labelKey: label-value
      3.   anotherLabelKey: another-label-value

    • annotations (string: null) - This value defines additional annotations for server pods. This should be formatted as a multi-line string.

      1. annotations: |
      2.   "sample/annotation1": "foo"
      3.   "sample/annotation2": "bar"

    • service - Server service properties.

      • annotations (string: null) - Annotations to apply to the server service.

        1. annotations: |
        2.   "annotation-key": "annotation-value"

    • extraEnvironmentVars (map) - A list of extra environment variables to set within the stateful set. These could be used to include proxy settings required for cloud auto-join feature, in case kubernetes cluster is behind egress http proxies. Additionally, it could be used to configure custom consul parameters.

  • externalServers - Configuration for Consul servers when the servers are running outside of Kubernetes. When running external servers, configuring these values is recommended if setting global.tls.enableAutoEncrypt to true (requires consul-k8s >= 0.13.0) or global.acls.manageSystemACLs to true (requires consul-k8s >= 0.14.0).

    • enabled (boolean: false) - If true, the Helm chart will be configured to talk to the external servers. If setting this to true, you must also set server.enabled to false.

    • hosts (array<string>: []) - An array of external Consul server hosts that are used to make HTTPS connections from the components in this Helm chart. Valid values include IPs, DNS names, or Cloud auto-join string. The port must be provided separately below. Note: client.join must also be set to the hosts that should be used to join the cluster. In most cases, the client.join values should be the same, however, they may be different if you wish to use separate hosts for the HTTPS connections.

    • httpsPort (integer: 8501) - The HTTPS port of the Consul servers.

    • tlsServerName (string: null) - The server name to use as the SNI host header when connecting with HTTPS.

    • useSystemRoots (boolean: false) - If true, consul-k8s components will ignore the CA set in global.tls.caCert when making HTTPS calls to Consul servers and will instead use the consul-k8s image’s system CAs for TLS verification. If false, consul-k8s components will use global.tls.caCert when making HTTPS calls to Consul servers. NOTE: This does not affect Consul’s internal RPC communication which will always use global.tls.caCert.

    • k8sAuthMethodHost (string: null) - If you are setting global.acls.manageSystemACLs and connectInject.enabled to true, set k8sAuthMethodHost to the address of the Kubernetes API server. This address must be reachable from the Consul servers. Please see the Kubernetes Auth Method documentation (https://consul.io/docs/acl/auth-methods/kubernetes). Requires consul-k8s >= 0.14.0.

      You could retrieve this value from your kubeconfig by running:

      1. kubectl config view \
      2.   -o jsonpath="{.clusters[?(@.name=='<your cluster name>')].cluster.server}"

  • client - Values that configure running a Consul client on Kubernetes nodes.

    • enabled (boolean: global.enabled) - If true, the chart will install all the resources necessary for a Consul client on every Kubernetes node. This does not require server.enabled, since the agents can be configured to join an external cluster.

    • image (string: null) - The name of the Docker image (including any tag) for the containers running Consul client agents.

    • join (array<string>: null) - A list of valid -retry-join values (https://consul.io/docs/agent/options#retry-join). If this is null (default), then the clients will attempt to automatically join the server cluster running within Kubernetes. This means that with server.enabled set to true, clients will automatically join that cluster. If server.enabled is not true, then a value must be specified so the clients can join a valid cluster.

    • dataDirectoryHostPath (string: null) - An absolute path to a directory on the host machine to use as the Consul client data directory. If set to the empty string or null, the Consul agent will store its data in the Pod’s local filesystem (which will be lost if the Pod is deleted). Security Warning: If setting this, Pod Security Policies must be enabled on your cluster and in this Helm chart (via the global.enablePodSecurityPolicies setting) to prevent other pods from mounting the same host path and gaining access to all of Consul’s data. Consul’s data is not encrypted at rest.

    • grpc (boolean: true) - If true, agents will enable their GRPC listener on port 8502 and expose it to the host. This will use slightly more resources, but is required for Connect.

    • exposeGossipPorts (boolean: false) - If true, the Helm chart will expose the clients’ gossip ports as hostPorts. This is only necessary if pod IPs in the k8s cluster are not directly routable and the Consul servers are outside of the k8s cluster. This also changes the clients’ advertised IP to the hostIP rather than podIP.

    • resources (map) - Resource settings for Client agents. NOTE: The use of a YAML string is deprecated. Instead, set directly as a YAML map.

    • securityContext (map) - The security context for the client pods. This should be a YAML map corresponding to a Kubernetes SecurityContext object. By default, servers will run as non-root, with user ID 100 and group ID 1000, which correspond to the consul user and group created by the Consul docker image. Note: if running on OpenShift, this setting is ignored because the user and group are set automatically by the OpenShift platform.

    • extraConfig (string: {}) - A raw string of extra JSON configuration (https://consul.io/docs/agent/options) for Consul clients. This will be saved as-is into a ConfigMap that is read by the Consul client agents. This can be used to add additional configuration that isn’t directly exposed by the chart.

      Example:

      1. extraConfig: |
      2.   {
      3.     "log_level": "DEBUG"
      4.   }

      This can also be set using Helm’s --set flag using the following syntax:

      1. --set 'client.extraConfig="{"log_level": "DEBUG"}"'

    • extraVolumes (array<map>) - A list of extra volumes to mount for client agents. This is useful for bringing in extra data that can be referenced by other configurations at a well known path, such as TLS certificates or Gossip encryption keys. The value of this should be a list of objects.

      Example:

      1. extraVolumes:
      2.   - type: secret
      3.     name: consul-certs
      4.     load: false

      Each object supports the following keys:

      • type - Type of the volume, must be one of “configMap” or “secret”. Case sensitive.

      • name - Name of the configMap or secret to be mounted. This also controls the path that it is mounted to. The volume will be mounted to /consul/userconfig/<name>.

      • load - If true, then the agent will be configured to automatically load HCL/JSON configuration files from this volume with -config-dir. This defaults to false.

    • tolerations (string: "") - Toleration Settings for Client pods This should be a multi-line string matching the Toleration array in a PodSpec. The example below will allow Client pods to run on every node regardless of taints

      1. tolerations: |
      2.   - operator: Exists

    • nodeSelector (string: null) - nodeSelector labels for client pod assignment, formatted as a multi-line string. ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector

      Example:

      1. nodeSelector: |
      2.   beta.kubernetes.io/arch: amd64

    • affinity (string: null) - Affinity Settings for Client pods, formatted as a multi-line YAML string. ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity

      Example:

      1. affinity: |
      2.   nodeAffinity:
      3.     requiredDuringSchedulingIgnoredDuringExecution:
      4.       nodeSelectorTerms:
      5.       - matchExpressions:
      6.         - key: node-role.kubernetes.io/master
      7.           operator: DoesNotExist

    • priorityClassName (string: "") - This value references an existing Kubernetes priorityClassName (https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#pod-priority) that can be assigned to client pods.

    • annotations (string: null) - This value defines additional annotations for client pods. This should be formatted as a multi-line string.

      1. annotations: |
      2.   "sample/annotation1": "foo"
      3.   "sample/annotation2": "bar"

    • extraLabels (map) - Extra labels to attach to the client pods. This should be a regular YAML map.

      Example:

      1. extraLabels:
      2.   labelKey: label-value
      3.   anotherLabelKey: another-label-value

    • extraEnvironmentVars (map) - A list of extra environment variables to set within the stateful set. These could be used to include proxy settings required for cloud auto-join feature, in case kubernetes cluster is behind egress http proxies. Additionally, it could be used to configure custom consul parameters.

    • dnsPolicy (string: null) - This value defines the Pod DNS policy (https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-dns-policy) for client pods to use.

    • hostNetwork (boolean: false) - hostNetwork defines whether or not we use host networking instead of hostPort in the event that a CNI plugin doesn’t support hostPort. This has security implications and is not recommended as doing so gives the consul client unnecessary access to all network traffic on the host. In most cases, pod network and host network are on different networks so this should be combined with dnsPolicy: ClusterFirstWithHostNet

    • updateStrategy (string: null) - updateStrategy for the DaemonSet. See https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set/#daemonset-update-strategy. This should be a multi-line string mapping directly to the updateStrategy

      Example:

      1. updateStrategy: |
      2.   rollingUpdate:
      3.     maxUnavailable: 5
      4.   type: RollingUpdate

    • snapshotAgent -

      Enterprise

      Values for setting up and running snapshot agents (https://consul.io/commands/snapshot/agent) within the Consul clusters. They are required to be co-located with Consul clients, so will inherit the clients’ nodeSelector, tolerations and affinity.

      • enabled (boolean: false) - If true, the chart will install resources necessary to run the snapshot agent.

      • replicas (integer: 2) - The number of snapshot agents to run.

      • configSecret - A Kubernetes secret that should be manually created to contain the entire config to be used on the snapshot agent. This is the preferred method of configuration since there are usually storage credentials present. Please see Snapshot agent config (https://consul.io/commands/snapshot/agent#config-file-options) for details.

        • secretName (string: null) - The name of the Kubernetes secret.

        • secretKey (string: null) - The key of the Kubernetes secret.

      • resources (map) - Resource settings for snapshot agent pods.

      • caCert (string: null) - Optional PEM-encoded CA certificate that will be added to the trusted system CAs. Useful if using an S3-compatible storage exposing a self-signed certificate.

        Example:

        1. caCert: |
        2.   -----BEGIN CERTIFICATE-----
        3.   MIIC7jCCApSgAwIBAgIRAIq2zQEVexqxvtxP6J0bXAwwCgYIKoZIzj0EAwIwgbkx
        4.   ...

  • dns - Configuration for DNS configuration within the Kubernetes cluster. This creates a service that routes to all agents (client or server) for serving DNS requests. This DOES NOT automatically configure kube-dns today, so you must still manually configure a stubDomain with kube-dns for this to have any effect: https://kubernetes.io/docs/tasks/administer-cluster/dns-custom-nameservers/#configure-stub-domain-and-upstream-dns-servers

    • enabled (boolean: -)

    • type (string: ClusterIP) - Used to control the type of service created. For example, setting this to “LoadBalancer” will create an external load balancer (for supported K8S installations)

    • clusterIP (string: null) - Set a predefined cluster IP for the DNS service. Useful if you need to reference the DNS service’s IP address in CoreDNS config.

    • annotations (string: null) - Extra annotations to attach to the dns service This should be a multi-line string of annotations to apply to the dns Service

    • additionalSpec (string: null) - Additional ServiceSpec values This should be a multi-line string mapping directly to a Kubernetes ServiceSpec object.

  • ui - Values that configure the Consul UI.

    • enabled (boolean: global.enabled) - If true, the UI will be enabled. This will only enable the UI, it doesn’t automatically register any service for external access. The UI will only be enabled on server agents. If server.enabled is false, then this setting has no effect. To expose the UI in some way, you must configure ui.service.

    • service - Configure the service for the Consul UI.

      • enabled (boolean: true) - This will enable/disable registering a Kubernetes Service for the Consul UI. This value only takes effect if ui.enabled is true and taking effect.

      • type (string: null) - The service type to register.

      • annotations (string: null) - Annotations to apply to the UI service.

        Example:

        1. annotations: |
        2.   'annotation-key': annotation-value

      • additionalSpec (string: null) - Additional ServiceSpec values This should be a multi-line string mapping directly to a Kubernetes ServiceSpec object.

    • ingress - Configure Ingress for the Consul UI. If global.tls.enabled is set to true, the Ingress will expose the port 443 on the UI service. Please ensure the Ingress Controller supports SSL pass-through and it is enabled to ensure traffic forwarded to port 443 has not been TLS terminated.

      • enabled (boolean: false) - This will create an Ingress resource for the Consul UI.

      • hosts (array<map>) - hosts is a list of host name to create Ingress rules.

        1. hosts:
        2.   - host: foo.bar
        3.     paths:
        4.       - /example
        5.       - /test

      • tls (array<map>) - tls is a list of hosts and secret name in an Ingress which tells the Ingress controller to secure the channel.

        1. tls:
        2.   - hosts:
        3.     - chart-example.local
        4.     secretName: testsecret-tls

      • annotations (string: null) - Annotations to apply to the UI ingress.

        Example:

        1. annotations: |
        2.   'annotation-key': annotation-value

    • metrics - Configurations for displaying metrics in the UI.

      • enabled (boolean: global.metrics.enabled) - Enable displaying metrics in the UI. The default value of “-“ will inherit from global.metrics.enabled value.

      • provider (string: prometheus) - Provider for metrics. See https://www.consul.io/docs/agent/options#ui_config_metrics_provider This value is only used if ui.enabled is set to true.

      • baseURL (string: http://prometheus-server) - baseURL is the URL of the prometheus server, usually the service URL. This value is only used if ui.enabled is set to true.

  • syncCatalog - Configure the catalog sync process to sync K8S with Consul services. This can run bidirectional (default) or unidirectionally (Consul to K8S or K8S to Consul only).

    This process assumes that a Consul agent is available on the host IP. This is done automatically if clients are enabled. If clients are not enabled then set the node selection so that it chooses a node with a Consul agent.

    • enabled (boolean: false) - True if you want to enable the catalog sync. Set to “-“ to inherit from global.enabled.

    • image (string: null) - The name of the Docker image (including any tag) for consul-k8s to run the sync program.

    • default (boolean: true) - If true, all valid services in K8S are synced by default. If false, the service must be annotated (https://consul.io/docs/k8s/service-sync#sync-enable-disable) properly to sync. In either case an annotation can override the default.

    • priorityClassName (string: "") - Optional priorityClassName.

    • toConsul (boolean: true) - If true, will sync Kubernetes services to Consul. This can be disabled to have a one-way sync.

    • toK8S (boolean: true) - If true, will sync Consul services to Kubernetes. This can be disabled to have a one-way sync.

    • k8sPrefix (string: null) - Service prefix to prepend to services before registering with Kubernetes. For example “consul-“ will register all services prepended with “consul-“. (Consul -> Kubernetes sync)

    • k8sAllowNamespaces (array<string>: ["*"]) - List of k8s namespaces to sync the k8s services from. If a k8s namespace is not included in this list or is listed in k8sDenyNamespaces, services in that k8s namespace will not be synced even if they are explicitly annotated. Use ["*"] to automatically allow all k8s namespaces.

      For example, ["namespace1", "namespace2"] will only allow services in the k8s namespaces namespace1 and namespace2 to be synced and registered with Consul. All other k8s namespaces will be ignored.

      To deny all namespaces, set this to [].

      Note: k8sDenyNamespaces takes precedence over values defined here. Requires consul-k8s v0.12+

    • k8sDenyNamespaces (array<string>: ["kube-system", "kube-public"]) - List of k8s namespaces that should not have their services synced. This list takes precedence over k8sAllowNamespaces. * is not supported because then nothing would be allowed to sync. Requires consul-k8s v0.12+.

      For example, if k8sAllowNamespaces is ["*"] and k8sDenyNamespaces is ["namespace1", "namespace2"], then all k8s namespaces besides namespace1 and namespace2 will be synced.

    • k8sSourceNamespace (string: null) - [DEPRECATED] Use k8sAllowNamespaces and k8sDenyNamespaces instead. For backwards compatibility, if both this and the allow/deny lists are set, the allow/deny lists will be ignored. k8sSourceNamespace is the Kubernetes namespace to watch for service changes and sync to Consul. If this is not set then it will default to all namespaces.

    • consulNamespaces -

      Enterprise

      These settings manage the catalog sync’s interaction with Consul namespaces (requires consul-ent v1.7+ and consul-k8s v0.12+). Also, global.enableConsulNamespaces must be true.

      • consulDestinationNamespace (string: default) - Name of the Consul namespace to register all k8s services into. If the Consul namespace does not already exist, it will be created. This will be ignored if mirroringK8S is true.

      • mirroringK8S (boolean: false) - If true, k8s services will be registered into a Consul namespace of the same name as their k8s namespace, optionally prefixed if mirroringK8SPrefix is set below. If the Consul namespace does not already exist, it will be created. Turning this on overrides the consulDestinationNamespace setting. addK8SNamespaceSuffix may no longer be needed if enabling this option.

      • mirroringK8SPrefix (string: "") - If mirroringK8S is set to true, mirroringK8SPrefix allows each Consul namespace to be given a prefix. For example, if mirroringK8SPrefix is set to “k8s-“, a service in the k8s staging namespace will be registered into the k8s-staging Consul namespace.

    • addK8SNamespaceSuffix (boolean: true) - Appends Kubernetes namespace suffix to each service name synced to Consul, separated by a dash. For example, for a service ‘foo’ in the default namespace, the sync process will create a Consul service named ‘foo-default’. Set this flag to true to avoid registering services with the same name but in different namespaces as instances for the same Consul service. Namespace suffix is not added if ‘annotationServiceName’ is provided.

    • consulPrefix (string: null) - Service prefix which prepends itself to Kubernetes services registered within Consul For example, “k8s-“ will register all services prepended with “k8s-“. (Kubernetes -> Consul sync) consulPrefix is ignored when ‘annotationServiceName’ is provided. NOTE: Updating this property to a non-null value for an existing installation will result in deregistering of existing services in Consul and registering them with a new name.

    • k8sTag (string: null) - Optional tag that is applied to all of the Kubernetes services that are synced into Consul. If nothing is set, defaults to “k8s”. (Kubernetes -> Consul sync)

    • consulNodeName (string: k8s-sync) - Defines the Consul synthetic node that all services will be registered to. NOTE: Changing the node name and upgrading the Helm chart will leave all of the previously sync’d services registered with Consul and register them again under the new Consul node name. The out-of-date registrations will need to be explicitly removed.

    • syncClusterIPServices (boolean: true) - Syncs services of the ClusterIP type, which may or may not be broadly accessible depending on your Kubernetes cluster. Set this to false to skip syncing ClusterIP services.

    • nodePortSyncType (string: ExternalFirst) - Configures the type of syncing that happens for NodePort services. The valid options are: ExternalOnly, InternalOnly, ExternalFirst.

      • ExternalOnly will only use a node’s ExternalIP address for the sync
      • InternalOnly use’s the node’s InternalIP address
      • ExternalFirst will preferentially use the node’s ExternalIP address, but if it doesn’t exist, it will use the node’s InternalIP address instead.

    • aclSyncToken - Refers to a Kubernetes secret that you have created that contains an ACL token for your Consul cluster which allows the sync process the correct permissions. This is only needed if ACLs are enabled on the Consul cluster.

      • secretName (string: null) - The name of the Kubernetes secret.

      • secretKey (string: null) - The key of the Kubernetes secret.

    • nodeSelector (string: null) - This value defines nodeSelector (https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector) labels for catalog sync pod assignment, formatted as a multi-line string.

      Example:

      1. nodeSelector: |
      2.   beta.kubernetes.io/arch: amd64

    • affinity (string: null) - Affinity Settings This should be a multi-line string matching the affinity object

    • tolerations (string: null) - Toleration Settings This should be a multi-line string matching the Toleration array in a PodSpec.

    • resources (map) - Resource settings for sync catalog pods.

    • logLevel (string: info) - Log verbosity level. One of “trace”, “debug”, “info”, “warn”, or “error”.

    • consulWriteInterval (string: null) - Override the default interval to perform syncing operations creating Consul services.

  • connectInject - Configures the automatic Connect sidecar injector.

    • enabled (boolean: false) - True if you want to enable connect injection. Set to “-“ to inherit from global.enabled.

    • image (string: null) - Image for consul-k8s that contains the injector

    • default (boolean: false) - If true, the injector will inject the Connect sidecar into all pods by default. Otherwise, pods must specify the injection annotation (https://consul.io/docs/k8s/connect#consul-hashicorp-com-connect-inject) to opt-in to Connect injection. If this is true, pods can use the same annotation to explicitly opt-out of injection.

    • healthChecks - Enables synchronization of Kubernetes health probe status with Consul. NOTE: It is highly recommended to enable TLS with this feature because it requires making calls to Consul clients across the cluster. Without TLS enabled, these calls could leak ACL tokens should the cluster network become compromised.

      • enabled (boolean: true) - Enables the Consul Health Check controller which syncs the readiness status of connect-injected pods with Consul.

      • reconcilePeriod (string: 1m) - If healthChecks.enabled is set to true, reconcilePeriod defines how often a full state reconcile is done after the initial reconcile at startup is completed.

    • metrics - Configures metrics for Consul Connect services. All values are overridable via annotations on a per-pod basis.

      • defaultEnabled (string: -) - If true, the connect-injector will automatically add prometheus annotations to connect-injected pods. It will also add a listener on the Envoy sidecar to expose metrics. The exposed metrics will depend on whether metrics merging is enabled:

        • If metrics merging is enabled: the Consul sidecar will run a merged metrics server combining Envoy sidecar and Connect service metrics, i.e. if your service exposes its own Prometheus metrics.
        • If metrics merging is disabled: the listener will just expose Envoy sidecar metrics. This will inherit from global.metrics.enabled.

      • defaultEnableMerging (boolean: false) - Configures the Consul sidecar to run a merged metrics server to combine and serve both Envoy and Connect service metrics. This feature is available only in Consul v1.10-alpha or greater.

      • defaultMergedMetricsPort (integer: 20100) - Configures the port at which the Consul sidecar will listen on to return combined metrics. This port only needs to be changed if it conflicts with the application’s ports.

      • defaultPrometheusScrapePort (integer: 20200) - Configures the port Prometheus will scrape metrics from, by configuring the Pod annotation prometheus.io/port and the corresponding listener in the Envoy sidecar. NOTE: This is not the port that your application exposes metrics on. That can be configured with the consul.hashicorp.com/service-metrics-port annotation.

      • defaultPrometheusScrapePath (string: /metrics) - Configures the path Prometheus will scrape metrics from, by configuring the pod annotation prometheus.io/path and the corresponding handler in the Envoy sidecar. NOTE: This is not the path that your application exposes metrics on. That can be configured with the consul.hashicorp.com/service-metrics-path annotation.

    • cleanupController - Cleanup controller cleans up Consul service instances that remain registered despite their pods no longer running. This could happen if the pod’s preStop hook failed to execute for some reason.

      • reconcilePeriod (string: 5m) - How often to do a full reconcile where the controller looks at all pods and service instances and ensure the state is correct. The controller reacts to each delete event immediately but if it misses an event due to being down or a network issue, the reconcile loop will handle cleaning up any missed deleted pods.

    • envoyExtraArgs (string: null) - Used to pass arguments to the injected envoy sidecar. Valid arguments to pass to envoy can be found here: https://www.envoyproxy.io/docs/envoy/latest/operations/cli e.g “—log-level debug —disable-hot-restart”

    • priorityClassName (string: "") - Optional priorityClassName.

    • imageConsul (string: null) - The Docker image for Consul to use when performing Connect injection. Defaults to global.image.

    • logLevel (string: info) - Log verbosity level. One of “debug”, “info”, “warn”, or “error”.

    • resources (map) - Resource settings for connect inject pods.

    • namespaceSelector (string: null) - Selector for restricting the webhook to only specific namespaces. This should be set to a multiline string. See https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/#matching-requests-namespaceselector for more details.

      Example:

      1. namespaceSelector: |
      2.   matchLabels:
      3.     namespace-label: label-value

    • k8sAllowNamespaces (array<string>: ["*"]) - List of k8s namespaces to allow Connect sidecar injection in. If a k8s namespace is not included or is listed in k8sDenyNamespaces, pods in that k8s namespace will not be injected even if they are explicitly annotated. Use ["*"] to automatically allow all k8s namespaces.

      For example, ["namespace1", "namespace2"] will only allow pods in the k8s namespaces namespace1 and namespace2 to have Connect sidecars injected and registered with Consul. All other k8s namespaces will be ignored.

      To deny all namespaces, set this to [].

      Note: k8sDenyNamespaces takes precedence over values defined here and namespaceSelector takes precedence over both since it is applied first. kube-system and kube-public are never injected, even if included here. Requires consul-k8s v0.12+

    • k8sDenyNamespaces (array<string>: []) - List of k8s namespaces that should not allow Connect sidecar injection. This list takes precedence over k8sAllowNamespaces. * is not supported because then nothing would be allowed to be injected.

      For example, if k8sAllowNamespaces is ["*"] and k8sDenyNamespaces is ["namespace1", "namespace2"], then all k8s namespaces besides “namespace1” and “namespace2” will be available for injection.

      Note: namespaceSelector takes precedence over this since it is applied first. kube-system and kube-public are never injected. Requires consul-k8s v0.12+.

    • consulNamespaces -

      Enterprise

      These settings manage the connect injector’s interaction with Consul namespaces (requires consul-ent v1.7+ and consul-k8s v0.12+). Also, global.enableConsulNamespaces must be true.

      • consulDestinationNamespace (string: default) - Name of the Consul namespace to register all k8s pods into. If the Consul namespace does not already exist, it will be created. This will be ignored if mirroringK8S is true.

      • mirroringK8S (boolean: false) - Causes k8s pods to be registered into a Consul namespace of the same name as their k8s namespace, optionally prefixed if mirroringK8SPrefix is set below. If the Consul namespace does not already exist, it will be created. Turning this on overrides the consulDestinationNamespace setting.

      • mirroringK8SPrefix (string: "") - If mirroringK8S is set to true, mirroringK8SPrefix allows each Consul namespace to be given a prefix. For example, if mirroringK8SPrefix is set to “k8s-“, a pod in the k8s staging namespace will be registered into the k8s-staging Consul namespace.

    • certs - The certs section configures how the webhook TLS certs are configured. These are the TLS certs for the Kube apiserver communicating to the webhook. By default, the injector will generate and manage its own certs, but this requires the ability for the injector to update its own MutatingWebhookConfiguration. In a production environment, custom certs should probably be used. Configure the values below to enable this.

      • secretName (string: null) - Name of the secret that has the TLS certificate and private key to serve the injector webhook. If this is null, then the injector will default to its automatic management mode that will assign a service account to the injector to generate its own certificates.

      • caBundle (string: "") - Base64-encoded PEM-encoded certificate bundle for the CA that signed the TLS certificate that the webhook serves. This must be set if secretName is non-null.

      • certName (string: tls.crt) - Name of the file within the secret for the TLS cert.

      • keyName (string: tls.key) - Name of the file within the secret for the private TLS key.

    • nodeSelector (string: null) - Selector labels for connectInject pod assignment, formatted as a multi-line string. ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector

      Example:

      1. nodeSelector: |
      2.   beta.kubernetes.io/arch: amd64

    • affinity (string: null) - Affinity Settings This should be a multi-line string matching the affinity object

    • tolerations (string: null) - Toleration Settings This should be a multi-line string matching the Toleration array in a PodSpec.

    • aclBindingRuleSelector (string: serviceaccount.name!=default) - Query that defines which Service Accounts can authenticate to Consul and receive an ACL token during Connect injection. The default setting, i.e. serviceaccount.name!=default, prevents the ‘default’ Service Account from logging in. If set to an empty string all service accounts can log in. This only has effect if ACLs are enabled.

      See https://www.consul.io/docs/acl/acl-auth-methods.html#binding-rules and https://www.consul.io/docs/acl/auth-methods/kubernetes.html#trusted-identity-attributes for more details. Requires Consul >= v1.5 and consul-k8s >= v0.8.0.

    • overrideAuthMethodName (string: "") - If you are not using global.acls.manageSystemACLs and instead manually setting up an auth method for Connect inject, set this to the name of your auth method.

    • aclInjectToken - Refers to a Kubernetes secret that you have created that contains an ACL token for your Consul cluster which allows the Connect injector the correct permissions. This is only needed if Consul namespaces

      Enterprise

      and ACLs are enabled on the Consul cluster and you are not setting global.acls.manageSystemACLs to true. This token needs to have operator = "write" privileges to be able to create Consul namespaces.

      • secretName (string: null) - The name of the Kubernetes secret.

      • secretKey (string: null) - The key of the Kubernetes secret.

    • sidecarProxy

    • initContainer (map) - Resource settings for the Connect injected init container.

  • controller - Controller handles config entry custom resources. Requires consul >= 1.8.4. ServiceIntentions require consul 1.9+.

    • enabled (boolean: false) - Enables the controller for managing custom resources.

    • replicas (integer: 1) - The number of deployment replicas.

    • logLevel (string: info) - Log verbosity level. One of “debug”, “info”, “warn”, or “error”.

    • resources (map) - Resource settings for controller pods.

    • nodeSelector (string: null) - Optional YAML string to specify a nodeSelector config.

    • tolerations (string: null) - Optional YAML string to specify tolerations.

    • affinity (string: null) - Affinity Settings This should be a multi-line string matching the affinity object

    • priorityClassName (string: "") - Optional priorityClassName.

    • aclToken - Refers to a Kubernetes secret that you have created that contains an ACL token for your Consul cluster which grants the controller process the correct permissions. This is only needed if you are managing ACLs yourself (i.e. not using global.acls.manageSystemACLs).

      If running Consul OSS, requires permissions:

      1. operator = "write"
      2. service_prefix "" {
      3.   policy = "write"
      4.   intentions = "write"
      5. }

      If running Consul Enterprise, talk to your account manager for assistance.

      • secretName (string: null) - The name of the Kubernetes secret.

      • secretKey (string: null) - The key of the Kubernetes secret.

  • meshGateway - Mesh Gateways enable Consul Connect to work across Consul datacenters.

    • enabled (boolean: false) - If mesh gateways are enabled, a Deployment will be created that runs gateways and Consul Connect will be configured to use gateways. See https://www.consul.io/docs/connect/mesh_gateway.html Requirements: consul 1.6.0+ and consul-k8s 0.15.0+ if using global.acls.manageSystemACLs.

    • replicas (integer: 2) - Number of replicas for the Deployment.

    • wanAddress - What gets registered as WAN address for the gateway.

      • source (string: Service) - source configures where to retrieve the WAN address (and possibly port) for the mesh gateway from. Can be set to either: Service, NodeIP, NodeName or Static.

        • Service - Determine the address based on the service type.

          • If service.type=LoadBalancer use the external IP or hostname of the service. Use the port set by service.port.

          • If service.type=NodePort use the Node IP. The port will be set to service.nodePort so service.nodePort cannot be null.

          • If service.type=ClusterIP use the ClusterIP. The port will be set to service.port.

          • service.type=ExternalName is not supported.

        • NodeIP - The node IP as provided by the Kubernetes downward API.

        • NodeName - The name of the node as provided by the Kubernetes downward API. This is useful if the node names are DNS entries that are routable from other datacenters.

        • Static - Use the address hardcoded in meshGateway.wanAddress.static.

      • port (integer: 443) - Port that gets registered for WAN traffic. If source is set to “Service” then this setting will have no effect. See the documentation for source as to which port will be used in that case.

      • static (string: "") - If source is set to “Static” then this value will be used as the WAN address of the mesh gateways. This is useful if you’ve configured a DNS entry to point to your mesh gateways.

    • service - The service option configures the Service that fronts the Gateway Deployment.

      • enabled (boolean: true) - Whether to create a Service or not.

      • type (string: LoadBalancer) - Type of service, ex. LoadBalancer, ClusterIP.

      • port (integer: 443) - Port that the service will be exposed on. The targetPort will be set to meshGateway.containerPort.

      • nodePort (integer: null) - Optionally hardcode the nodePort of the service if using a NodePort service. If not set and using a NodePort service, Kubernetes will automatically assign a port.

      • annotations (string: null) - Annotations to apply to the mesh gateway service.

        Example:

        1. annotations: |
        2.   'annotation-key': annotation-value

      • additionalSpec (string: null) - Optional YAML string that will be appended to the Service spec.

    • hostNetwork (boolean: false) - If set to true, gateway Pods will run on the host network.

    • dnsPolicy (string: null) - dnsPolicy to use.

    • consulServiceName (string: mesh-gateway) - Consul service name for the mesh gateways. Cannot be set to anything other than “mesh-gateway” if global.acls.manageSystemACLs is true since the ACL token generated is only for the name ‘mesh-gateway’.

    • containerPort (integer: 8443) - Port that the gateway will run on inside the container.

    • hostPort (integer: null) - Optional hostPort for the gateway to be exposed on. This can be used with wanAddress.port and wanAddress.useNodeIP to expose the gateways directly from the node. If hostNetwork is true, this must be null or set to the same port as containerPort. NOTE: Cannot set to 8500 or 8502 because those are reserved for the Consul agent.

    • resources (map) - Resource settings for mesh gateway pods. NOTE: The use of a YAML string is deprecated. Instead, set directly as a YAML map.

    • initCopyConsulContainer (map) - Resource settings for the copy-consul-bin init container.

    • affinity (string) - By default, we set an anti-affinity so that two gateway pods won’t be on the same node. NOTE: Gateways require that Consul client agents are also running on the nodes alongside each gateway pod.

    • tolerations (string: null) - Optional YAML string to specify tolerations.

    • nodeSelector (string: null) - Optional YAML string to specify a nodeSelector config.

    • priorityClassName (string: "") - Optional priorityClassName.

    • annotations (string: null) - Annotations to apply to the mesh gateway deployment.

      Example:

      1. annotations: |
      2.   'annotation-key': annotation-value

  • ingressGateways - Configuration options for ingress gateways. Default values for all ingress gateways are defined in ingressGateways.defaults. Any of these values may be overridden in ingressGateways.gateways for a specific gateway with the exception of annotations. Annotations will include both the default annotations and any additional ones defined for a specific gateway. Requirements: consul >= 1.8.0 and consul-k8s >= 0.16.0 if using global.acls.manageSystemACLs and consul-k8s >= 0.10.0 if not.

    • enabled (boolean: false) - Enable ingress gateway deployment. Requires connectInject.enabled=true and client.enabled=true.

    • defaults - Defaults sets default values for all gateway fields. With the exception of annotations, defining any of these values in the gateways list will override the default values provided here. Annotations will include both the default annotations and any additional ones defined for a specific gateway.

      • replicas (integer: 2) - Number of replicas for each ingress gateway defined.

      • service - The service options configure the Service that fronts the gateway Deployment.

        • type (string: ClusterIP) - Type of service: LoadBalancer, ClusterIP or NodePort. If using NodePort service type, you must set the desired nodePorts in the ports setting below.

        • ports (array<map>: [{port: 8080, port: 8443}]) - Ports that will be exposed on the service and gateway container. Any ports defined as ingress listeners on the gateway’s Consul configuration entry should be included here. The first port will be used as part of the Consul service registration for the gateway and be listed in its SRV record. If using a NodePort service type, you must specify the desired nodePort for each exposed port.

        • annotations (string: null) - Annotations to apply to the ingress gateway service. Annotations defined here will be applied to all ingress gateway services in addition to any service annotations defined for a specific gateway in ingressGateways.gateways.

          Example:

          1. annotations: |
          2.   'annotation-key': annotation-value

        • additionalSpec (string: null) - Optional YAML string that will be appended to the Service spec.

      • resources (map) - Resource limits for all ingress gateway pods

      • initCopyConsulContainer (map) - Resource settings for the copy-consul-bin init container.

      • affinity (string) - By default, we set an anti-affinity so that two of the same gateway pods won’t be on the same node. NOTE: Gateways require that Consul client agents are also running on the nodes alongside each gateway pod.

      • tolerations (string: null) - Optional YAML string to specify tolerations.

      • nodeSelector (string: null) - Optional YAML string to specify a nodeSelector config.

      • priorityClassName (string: "") - Optional priorityClassName.

      • annotations (string: null) - Annotations to apply to the ingress gateway deployment. Annotations defined here will be applied to all ingress gateway deployments in addition to any annotations defined for a specific gateway in ingressGateways.gateways.

        Example:

        1. annotations: |
        2.   "annotation-key": 'annotation-value'

      • consulNamespace (string: default) -

        Enterprise

        consulNamespace defines the Consul namespace to register the gateway into. Requires global.enableConsulNamespaces to be true and Consul Enterprise v1.7+ with a valid Consul Enterprise license. Note: The Consul namespace MUST exist before the gateway is deployed.

    • gateways (array<map>) - Gateways is a list of gateway objects. The only required field for each is name, though they can also contain any of the fields in defaults. Values defined here override the defaults except in the case of annotations where both will be applied.

      • name (string: ingress-gateway)

  • terminatingGateways - Configuration options for terminating gateways. Default values for all terminating gateways are defined in terminatingGateways.defaults. Any of these values may be overridden in terminatingGateways.gateways for a specific gateway with the exception of annotations. Annotations will include both the default annotations and any additional ones defined for a specific gateway. Requirements: consul >= 1.8.0 and consul-k8s >= 0.16.0 if using global.acls.manageSystemACLs and consul-k8s >= 0.10.0 if not.

    • enabled (boolean: false) - Enable terminating gateway deployment. Requires connectInject.enabled=true and client.enabled=true.

    • defaults - Defaults sets default values for all gateway fields. With the exception of annotations, defining any of these values in the gateways list will override the default values provided here. Annotations will include both the default annotations and any additional ones defined for a specific gateway.

      • replicas (integer: 2) - Number of replicas for each terminating gateway defined.

      • extraVolumes (array<map>) - A list of extra volumes to mount. These will be exposed to Consul in the path /consul/userconfig/<name>/.

        Example:

        1. extraVolumes:
        2.   - type: secret
        3.     name: my-secret
        4.     items: # optional items array
        5.       - key: key
        6.         path: path # secret will now mount to /consul/userconfig/my-secret/path

      • resources (map) - Resource limits for all terminating gateway pods

      • initCopyConsulContainer (map) - Resource settings for the copy-consul-bin init container.

      • affinity (string) - By default, we set an anti-affinity so that two of the same gateway pods won’t be on the same node. NOTE: Gateways require that Consul client agents are also running on the nodes alongside each gateway pod.

      • tolerations (string: null) - Optional YAML string to specify tolerations.

      • nodeSelector (string: null) - Optional YAML string to specify a nodeSelector config.

      • priorityClassName (string: "") - Optional priorityClassName.

      • annotations (string: null) - Annotations to apply to the terminating gateway deployment. Annotations defined here will be applied to all terminating gateway deployments in addition to any annotations defined for a specific gateway in terminatingGateways.gateways.

        Example:

        1. annotations: |
        2.   'annotation-key': annotation-value

      • consulNamespace (string: default) -

        Enterprise

        consulNamespace defines the Consul namespace to register the gateway into. Requires global.enableConsulNamespaces to be true and Consul Enterprise v1.7+ with a valid Consul Enterprise license. Note: The Consul namespace MUST exist before the gateway is deployed.

    • gateways (array<map>) - Gateways is a list of gateway objects. The only required field for each is name, though they can also contain any of the fields in defaults. Values defined here override the defaults except in the case of annotations where both will be applied.

      • name (string: terminating-gateway)

  • prometheus - Configures a demo Prometheus installation.

    • enabled (boolean: false) - When true, the Helm chart will install a demo Prometheus server instance alongside Consul.

  • grafana - Configures a demo Grafana installation.

    • enabled (boolean: false) - When true, the Helm chart will install a demo Grafana instance alongside Consul.

  • tests - Control whether a test Pod manifest is generated when running helm template. When using helm install, the test Pod is not submitted to the cluster so this is only useful when running helm template.

Helm Chart Examples

The below config.yaml results in a single server Consul cluster with a LoadBalancer to allow external access to the UI and API.

  1. # config.yaml
  2. server:
  3.   replicas: 1
  4.   bootstrapExpect: 1
  6. ui:
  7.   service:
  8.     type: LoadBalancer

The below config.yaml results in a three server Consul Enterprise cluster with 100GB of storage and automatic Connect injection.

Note, this would require a secret that contains the enterprise license key.

  1. # config.yaml
  2. global:
  3.   image: 'hashicorp/consul-enterprise:1.4.2-ent'
  5. server:
  6.   replicas: 3
  7.   bootstrapExpect: 3
  8.   enterpriseLicense:
  9.     secretName: 'consul-license'
  10.     secretKey: 'key'
  11.   storage: 100Gi
  12.   connect: true
  14. client:
  15.   grpc: true
  17. connectInject:
  18.   enabled: true
  19.   default: false

Customizing the Helm Chart

Consul within Kubernetes is highly configurable and the Helm chart contains dozens of the most commonly used configuration options. If you need to extend the Helm chart with additional options, we recommend using a third-party tool, such as kustomize or ship. Note that the Helm chart heavily relies on Helm lifecycle hooks, and so features like bootstrapping ACLs or TLS will not work as expected. Additionally, we can make changes to the internal implementation (e.g., renaming template files) that may be backward incompatible with such customizations.