Built-in Trait Type

Version: v1.8

Built-in Trait Type

This documentation will walk through all the built-in trait types sorted alphabetically.

It was generated automatically by scripts, please don’t update manually, last updated at 2023-01-16T19:19:03+08:00.

Affinity specifies affinity and toleration K8s pod for your workload which follows the pod spec in path ‘spec.template’.

For now this trait is hidden from the VelaUX. Available when using CLI

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
        labels:
          label-key: label-value
          to-delete-label-key: to-delete-label-value
      traits:
        - type: affinity
          properties:
            podAffinity:
              preferred:
                - weight: 1
                  podAffinityTerm:
                    labelSelector:
                      matchExpressions:
                        - key: "secrity"
                          values: ["S1"]
                    namespaces: ["default"]
                    topologyKey: "kubernetes.io/hostname"

Name	Description	Type	Required
podAffinity	Specify the pod affinity scheduling rules.	podAffinity	false
podAntiAffinity	Specify the pod anti-affinity scheduling rules.	podAntiAffinity	false
nodeAffinity	Specify the node affinity scheduling rules for the pod.	nodeAffinity	false
tolerations	Specify tolerant taint.	[]tolerations	false

Name	Description	Type	Required	Default
required	Specify the required during scheduling ignored during execution.	[]required	false
preferred	Specify the preferred during scheduling ignored during execution.	[]preferred	false

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
weight	Specify weight associated with matching the corresponding podAffinityTerm.	int	true
podAffinityTerm	Specify a set of pods.	podAffinityTerm	true

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
required	Specify the required during scheduling ignored during execution.	[]required	false
preferred	Specify the preferred during scheduling ignored during execution.	[]preferred	false

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
weight	Specify weight associated with matching the corresponding podAffinityTerm.	int	true
podAffinityTerm	Specify a set of pods.	podAffinityTerm	true

Name	Type	Required
labelSelector	labelSelector	false
namespaces	[]string	false
topologyKey	string	true
namespaceSelector	namespaceSelector	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Name	Description	Type	Required	Default
required	Specify the required during scheduling ignored during execution.	required	false
preferred	Specify the preferred during scheduling ignored during execution.	[]preferred	false

Name	Description	Type	Required	Default
nodeSelectorTerms	Specify a list of node selector.	[]nodeSelectorTerms	true

Name	Description	Type	Required	Default
matchExpressions		[]matchExpressions	false
matchFields		[]matchFields	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist” or “Gt” or “Lt”	false	In
values	[]string	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist” or “Gt” or “Lt”	false	In
values	[]string	false

Name	Description	Type	Required	Default
weight	Specify weight associated with matching the corresponding nodeSelector.	int	true
preference	Specify a node selector.	preference	true

Name	Description	Type	Required	Default
matchExpressions		[]matchExpressions	false
matchFields		[]matchFields	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist” or “Gt” or “Lt”	false	In
values	[]string	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist” or “Gt” or “Lt”	false	In
values	[]string	false

Name	Description	Type	Required	Default
key		string	false
operator		“Equal” or “Exists”	false	Equal
value		string	false
effect		“NoSchedule” or “PreferNoSchedule” or “NoExecute”	false
tolerationSeconds	Specify the period of time the toleration.	int	false

Add annotations on your workload. if it generates pod, add same annotations for generated pods.

All Component Types

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: myapp
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: crccheck/hello-world
        port: 8000
      traits:
        - type: labels
          properties:
            "release": "stable"
        - type: annotations
          properties:
            "description": "web application"

Name	Description	Type	Required	Default
-		map[string]:(null\|string)	true

Add command on K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: sidecar
          properties:
            name: sidecar-nginx
            image: nginx
        - type: command
          properties:
            # you can use command to control multiple containers by filling `containers`
            # NOTE: in containers, you must set the container name for each container
            containers:
              - containerName: busybox
                command: ["sleep", "8640000"]
              - containerName: sidecar-nginx
                args: ["-q"]

Name	Description	Type	Required	Default
	PatchParams or type-option-2	false

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
command	Specify the command to use in the target container, if not set, it will not be changed.	null	true
args	Specify the args to use in the target container, if set, it will override existing args.	null	true
addArgs	Specify the args to add in the target container, existing args will be kept, cannot be used with `args`.	null	true
delArgs	Specify the existing args to delete in the target container, cannot be used with `args`.	null	true

Name	Description	Type	Required	Default
containers	Specify the commands for multiple containers.	[]containers	true

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
command	Specify the command to use in the target container, if not set, it will not be changed.	null	true
args	Specify the args to use in the target container, if set, it will override existing args.	null	true
addArgs	Specify the args to add in the target container, existing args will be kept, cannot be used with `args`.	null	true
delArgs	Specify the existing args to delete in the target container, cannot be used with `args`.	null	true

Set the image of the container.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: sidecar
          properties:
            name: sidecar-nginx
            image: nginx
        - type: container-image
          properties:
            # you can use container-image to control multiple containers by filling `containers`
            # NOTE: in containers, you must set the container name for each container
            containers:
              - containerName: busybox
                image: busybox-1.34.0
                imagePullPolicy: IfNotPresent
              - containerName: sidecar-nginx
                image: nginx-1.20

Name	Description	Type	Required	Default
	PatchParams or type-option-2	false

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
image	Specify the image of the container.	string	true
imagePullPolicy	Specify the image pull policy of the container.	“” or “IfNotPresent” or “Always” or “Never”	false	empty

Name	Description	Type	Required	Default
containers	Specify the container image for multiple containers.	[]containers	true

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
image	Specify the image of the container.	string	true
imagePullPolicy	Specify the image pull policy of the container.	“” or “IfNotPresent” or “Always” or “Never”	false	empty

Automatically scale the component based on CPU usage.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: website
spec:
  components:
    - name: frontend
      type: webservice
      properties:
        image: nginx
      traits:
        - type: cpuscaler
          properties:
            min: 1
            max: 10
            cpuUtil: 60

Name	Description	Type	Required	Default
min	Specify the minimal number of replicas to which the autoscaler can scale down.	int	false	1
max	Specify the maximum number of of replicas to which the autoscaler can scale up.	int	false	10
cpuUtil	Specify the average cpu utilization, for example, 50 means the CPU usage is 50%.	int	false	50
targetAPIVersion	Specify the apiVersion of scale target.	string	false	apps/v1
targetKind	Specify the kind of scale target.	string	false	Deployment

Add env on K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: sidecar
          properties:
            name: sidecar-nginx
            image: nginx
        - type: env
          properties:
            # you can use env to control multiple containers by filling `containers`
            # NOTE: in containers, you must set the container name for each container
            containers:
              - containerName: busybox
                env:
                  key_for_busybox_first: value_first
                  key_for_busybox_second: value_second
              - containerName: sidecar-nginx
                env:
                  key_for_nginx_first: value_first
                  key_for_nginx_second: value_second

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: sidecar
          properties:
            name: sidecar-nginx
            image: nginx
        - type: env
          properties:
            # you can use env to control one container, if containerName not specified, it will patch on the first index container 
            containerName: busybox
            env:
              key_for_busybox_first: value_first
              key_for_busybox_second: value_second

Name	Description	Type	Required	Default
	PatchParams or type-option-2	false

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
replace	Specify if replacing the whole environment settings for the container.	bool	false	false
env	Specify the environment variables to merge, if key already existing, override its value.	map[string]string	true
unset	Specify which existing environment variables to unset.	[]string	true

Name	Description	Type	Required	Default
containers	Specify the environment variables for multiple containers.	[]containers	true

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
replace	Specify if replacing the whole environment settings for the container.	bool	false	false
env	Specify the environment variables to merge, if key already existing, override its value.	map[string]string	true
unset	Specify which existing environment variables to unset.	[]string	true

Expose port to enable web traffic for your component.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: test-app
spec:
  components:
    - name: hello-world
      type: webservice
      properties:
        image: crccheck/hello-world
      traits:
        - type: expose
          properties:
            port: [8000]

Name	Description	Type	Required	Default
port	Specify the exposion ports.	[]int	true
annotations	Specify the annotaions of the exposed service.	map[string]string	true
type	Specify what kind of Service you want. options: “ClusterIP”,”NodePort”,”LoadBalancer”,”ExternalName”.	“ClusterIP” or “NodePort” or “LoadBalancer” or “ExternalName”	false	ClusterIP

Enable public web traffic for the component, the ingress API matches K8s v1.20+.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

# vela-app.yaml
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: first-vela-app
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: oamdev/hello-world
        port: 8000
      traits:
        - type: gateway
          properties:
            domain: testsvc.example.com
            http:
              "/": 8000

Name	Description	Type	Required	Default
domain	Specify the domain you want to expose.	string	false
http	Specify the mapping relationship between the http path and the workload port.	map[string]int	true
class	Specify the class of ingress to use.	string	false	nginx
classInSpec	Set ingress class in ‘.spec.ingressClassName’ instead of ‘kubernetes.io/ingress.class’ annotation.	bool	false	false
secretName	Specify the secret name you want to quote to use tls.	string	false
gatewayHost	Specify the host of the ingress gateway, which is used to generate the endpoints when the host is empty.	string	false

Add host aliases on K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-with-hostalias
spec:
  components:
    - name: busybox-runner
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'
      traits:
        - type: hostalias
          properties:
            hostAliases:
              - ip: 127.0.0.1
                hostnames:
                  - localname
                  - locals

Name	Description	Type	Required	Default
hostAliases	Specify the hostAliases to add.	[]hostAliases	true

Name	Description	Type	Required	Default
ip		string	true
hostnames		[]string	true

Configure k8s HPA for Deployment or Statefulsets.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: helloworld
spec:
  components:
    - name: helloworld
      type: webservice
      properties:
        cpu: "0.5"
        exposeType: ClusterIP
        image: oamdev/hello-world
        memory: 1024Mi
        ports:
          - expose: true
            port: 80
            protocol: TCP
      traits:
        - type: scaler
          properties:
            replicas: 1
        - type: hpa
          properties:
            targetAPIVersion: apps/v1
            targetKind: Deployment
            max: 10
            min: 1
            cpu:
              type: Utilization
              value: 80
            mem:
              type: AverageValue
              value: 90
            podCustomMetrics:
              # here are custom metric names and values. Please replace them to be your metrics
              - name: pod_net_received_rate
                value: "77"
              - name: pod_net_transmitted_rate
                value: "88"
              - name: pod_net_received_packets_rate
                value: "95"
              - name: pod_net_transmitted_packets_rate
                value: "99"
  policies:
    - name: apply-once
      type: apply-once
      properties:
        enable: true
        rules:
          - strategy:
              path: ["spec.replicas"]
            selector:
              resourceTypes: ["Deployment","StatefulSet"]

Name	Description	Type	Required	Default
min	Specify the minimal number of replicas to which the autoscaler can scale down.	int	false	1
max	Specify the maximum number of of replicas to which the autoscaler can scale up.	int	false	10
targetAPIVersion	Specify the apiVersion of scale target.	string	false	apps/v1
targetKind	Specify the kind of scale target.	string	false	Deployment
cpu		cpu	true
mem		mem	false
podCustomMetrics	Specify custom metrics of pod type.	[]podCustomMetrics	false

Name	Description	Type	Required	Default
type	Specify resource metrics in terms of percentage(“Utilization”) or direct value(“AverageValue”).	“Utilization” or “AverageValue”	false	Utilization
value	Specify the value of CPU utilization or averageValue.	int	false	50

Name	Description	Type	Required	Default
type	Specify resource metrics in terms of percentage(“Utilization”) or direct value(“AverageValue”).	“Utilization” or “AverageValue”	false	Utilization
value	Specify the value of MEM utilization or averageValue.	int	false	50

Name	Description	Type	Required	Default
name	Specify name of custom metrics.	string	true
value	Specify target value of custom metrics.	string	true

add an init container and use shared volume with pod.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
      traits:
        - type: init-container
          properties:
            name: init-busybox
            image: busybox
            cmd: ["echo", "hello"]
            initMountPath: /data
            appMountPath: /data-initialized

Name	Description	Type	Required	Default
name	Specify the name of init container.	string	true
image	Specify the image of init container.	string	true
imagePullPolicy	Specify image pull policy for your service.	“IfNotPresent” or “Always” or “Never”	false	IfNotPresent
cmd	Specify the commands run in the init container.	[]string	false
args	Specify the args run in the init container.	[]string	false
env	Specify the env run in the init container.	[]env	false
mountName	Specify the mount name of shared volume.	string	false	workdir
appMountPath	Specify the mount path of app container.	string	true
initMountPath	Specify the mount path of init container.	string	true
extraVolumeMounts	Specify the extra volume mounts for the init container.	[]extraVolumeMounts	true

Name	Description	Type	Required
name	Environment variable name.	string	true
value	The value of the environment variable.	string	false
valueFrom	Specifies a source the value of this var should come from.	valueFrom	false

Name	Description	Type	Required	Default
secretKeyRef	Selects a key of a secret in the pod’s namespace.	secretKeyRef	false
configMapKeyRef	Selects a key of a config map in the pod’s namespace.	configMapKeyRef	false

Name	Description	Type	Required	Default
name	The name of the secret in the pod’s namespace to select from.	string	true
key	The key of the secret to select from. Must be a valid secret key.	string	true

Name	Description	Type	Required	Default
name	The name of the config map in the pod’s namespace to select from.	string	true
key	The key of the config map to select from. Must be a valid secret key.	string	true

Name	Description	Type	Required	Default
name	The name of the volume to be mounted.	string	true
mountPath	The mountPath for mount in the init container.	string	true

Patch the output following Json Merge Patch strategy, following RFC 7396.

For now this trait is hidden from the VelaUX. Available when using CLI

All Component Types

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
        labels:
          pod-label-key: pod-label-value
          to-delete-label-key: to-delete-label-value
      traits:
        # the json merge patch can be used to add, replace and delete fields
        # the following part will
        # 1. add `deploy-label-key` to deployment labels
        # 2. set deployment replicas to 3
        # 3. set `pod-label-key` to `pod-label-modified-value` in pod labels
        # 4. delete `to-delete-label-key` in pod labels
        # 5. reset `containers` for pod
        - type: json-merge-patch
          properties:
            metadata:
              labels:
                deploy-label-key: deploy-label-added-value
            spec:
              replicas: 3
              template:
                metadata:
                  labels:
                    pod-label-key: pod-label-modified-value
                    to-delete-label-key: null
                spec:
                  containers:
                    - name: busybox-new
                      image: busybox:1.34
                      command: ["sleep", "864000"]

Name	Description	Type	Required	Default
-		{}	true

Patch the output following Json Patch strategy, following RFC 6902.

For now this trait is hidden from the VelaUX. Available when using CLI

All Component Types

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: busybox
spec:
  components:
    - name: busybox
      type: webservice
      properties:
        image: busybox
        cmd: ["sleep", "86400"]
        labels:
          pod-label-key: pod-label-value
          to-delete-label-key: to-delete-label-value
      traits:
        # the json patch can be used to add, replace and delete fields
        # the following part will
        # 1. add `deploy-label-key` to deployment labels
        # 2. set deployment replicas to 3
        # 3. set `pod-label-key` to `pod-label-modified-value` in pod labels
        # 4. delete `to-delete-label-key` in pod labels
        # 5. add sidecar container for pod
        - type: json-patch
          properties:
            operations:
              - op: add
                path: "/spec/replicas"
                value: 3
              - op: replace
                path: "/spec/template/metadata/labels/pod-label-key"
                value: pod-label-modified-value
              - op: remove
                path: "/spec/template/metadata/labels/to-delete-label-key"
              - op: add
                path: "/spec/template/spec/containers/1"
                value:
                  name: busybox-sidecar
                  image: busybox:1.34
                  command: ["sleep", "864000"]

Name	Description	Type	Required	Default
operations		[]operations	true

Name	Description	Type	Required	Default
-		{}	true

Set k8s update strategy for Deployment/DaemonSet/StatefulSet.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-with-update-strategy
spec:
  components:
    - name: helloworld
      type: webservice
      properties:
        cpu: "0.5"
        exposeType: ClusterIP
        image: oamdev/hello-world:latest
        memory: 1024Mi
        ports:
          - expose: true
            port: 80
            protocol: TCP
      traits:
        - type: scaler
          properties:
            replicas: 5
        - type: k8s-update-strategy
          properties:
            targetAPIVersion: apps/v1
            targetKind: Deployment
            strategy:
              type: RollingUpdate
              rollingStrategy:
                maxSurge: 20%
                maxUnavailable: 30%
---
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-node-exporter
spec:
  components:
    - name: node-exporter
      type: daemon
      properties:
        image: prom/node-exporter
        imagePullPolicy: IfNotPresent
        volumeMounts:
          hostPath:
            - mountPath: /host/sys
              mountPropagation: HostToContainer
              name: sys
              path: /sys
              readOnly: true
            - mountPath: /host/root
              mountPropagation: HostToContainer
              name: root
              path: /
              readOnly: true
      traits:
        - properties:
            args:
              - --path.sysfs=/host/sys
              - --path.rootfs=/host/root
              - --no-collector.wifi
              - --no-collector.hwmon
              - --collector.filesystem.ignored-mount-points=^/(dev|proc|sys|var/lib/docker/.+|var/lib/kubelet/pods/.+)($|/)
              - --collector.netclass.ignored-devices=^(veth.*)$
          type: command
        - properties:
            annotations:
              prometheus.io/path: /metrics
              prometheus.io/port: "8080"
              prometheus.io/scrape: "true"
            port:
              - 9100
          type: expose
        - properties:
            cpu: 0.1
            memory: 250Mi
          type: resource
        - type: k8s-update-strategy
          properties:
            targetAPIVersion: apps/v1
            targetKind: DaemonSet
            strategy:
              type: RollingUpdate
              rollingStrategy:
                maxSurge: 20%
                maxUnavailable: 30%

Name	Description	Type	Required	Default
targetAPIVersion	Specify the apiVersion of target.	string	false	apps/v1
targetKind	Specify the kind of target.	“Deployment” or “StatefulSet” or “DaemonSet”	false	Deployment
strategy	Specify the strategy of update.	strategy	true

Name	Description	Type	Required	Default
type	Specify the strategy type.	“RollingUpdate” or “Recreate” or “OnDelete”	false	RollingUpdate
rollingStrategy	Specify the parameters of rollong update strategy.	rollingStrategy	false

Name	Type	Required	Default
maxSurge	string	false	25%
maxUnavailable	string	false	25%
partition	int	false	0

Add labels on your workload. if it generates pod, add same label for generated pods.

All Component Types

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: myapp
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: crccheck/hello-world
        port: 8000
      traits:
        - type: labels
          properties:
            "release": "stable"
        - type: annotations
          properties:
            "description": "web application"

Name	Description	Type	Required	Default
-		map[string]:(null\|string)	true

Add lifecycle hooks for every container of K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-with-lifecycle
spec:
  components:
    - name: busybox-runner
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'
      traits:
        - type: lifecycle
          properties:
            postStart:
              exec:
                command:
                  - echo
                  - 'hello world'
            preStop:
              httpGet:
                host: "www.aliyun.com"
                scheme: "HTTPS"
                port: 443

Name	Description	Type	Required	Default
postStart		postStart	false
preStop		preStop	false

Name	Type	Required
exec	exec	false
httpGet	httpGet	false
tcpSocket	tcpSocket	false

Name	Description	Type	Required	Default
command		[]string	true

Name	Type	Required	Default
path	string	false
port	int	true
host	string	false
scheme	“HTTP” or “HTTPS”	false	HTTP
httpHeaders	[]httpHeaders	false

Name	Description	Type	Required	Default
name		string	true
value		string	true

Name	Description	Type	Required	Default
port		int	true
host		string	false

Name	Type	Required
exec	exec	false
httpGet	httpGet	false
tcpSocket	tcpSocket	false

Name	Description	Type	Required	Default
command		[]string	true

Name	Type	Required	Default
path	string	false
port	int	true
host	string	false
scheme	“HTTP” or “HTTPS”	false	HTTP
httpHeaders	[]httpHeaders	false

Name	Description	Type	Required	Default
name		string	true
value		string	true

Name	Description	Type	Required	Default
port		int	true
host		string	false

nocalhost develop configuration.

For now this trait is hidden from the VelaUX. Available when using CLI

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: bookinfo
spec:
  components:
    - name: productpage
      type: webservice
      properties:
        image: nocalhost-docker.pkg.coding.net/nocalhost/bookinfo/productpage:latest
        port: 9080
      traits:
        - type: nocalhost
          properties:
            port: 9080
            gitUrl: https://github.com/nocalhost/bookinfo-productpage.git
            image: nocalhost-docker.pkg.coding.net/nocalhost/dev-images/python:3.7.7-slim-productpage-with-pydevd
            shell: "bash"
            workDir: "/opt/work"
            resources:
              limits:
                memory: 1Gi
                cpu: "1"
              requests:
                memory: 512Mi
                cpu: "0.5"
            debug:
              remoteDebugPort: 9009
            hotReload: true
            sync:
              type: send
              filePattern:
                - ./
              ignoreFilePattern:
                - .git
                - .idea
            command:
              run:
                - sh
                - run.sh
              debug:
                - sh
                - debug.sh
            env:
              - name: "foo"
                value: "bar"
            portForward:
              - 39080:9080

Name	Type	Required	Default
port	int	true
serviceType	string	false	deployment
gitUrl	string	false
image	string	true
shell	string	false	bash
workDir	string	false	/home/nocalhost-dev
storageClass	string	false
command	command	true
debug	debug	false
hotReload	bool	false	true
sync	sync	true
env	[]env	false
portForward	[]string	false
persistentVolumeDirs	[]persistentVolumeDirs	false
resources	resources	true

Name	Description	Type	Required	Default
run		[]string	true
debug		[]string	true

Name	Description	Type	Required	Default
remoteDebugPort		int	false

Name	Type	Required	Default
type	string	false	send
filePattern	[]string	true
ignoreFilePattern	[]string	true

Name	Description	Type	Required	Default
name		string	true
value		string	true

Name	Description	Type	Required	Default
path		string	true
capacity		string	true

Name	Description	Type	Required	Default
limits		limits	true
requests		requests	true

Name	Description	Type	Required	Default
memory		string	false	2Gi
cpu		string	false	2

Name	Description	Type	Required	Default
memory		string	false	512Mi
cpu		string	false	0.5

Add resource requests and limits on K8s pod for your workload which follows the pod spec in path ‘spec.template.’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: resource-app
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: crccheck/hello-world
        ports:
          - port: 8000
      traits:
        - type: resource
          properties:
            cpu: 2
            memory: 2Gi
            requests:
              cpu: 2
              memory: 2Gi
            limits:
              cpu: 4
              memory: 4Gi

Name	Description	Type	Required	Default
cpu	Specify the amount of cpu for requests and limits.	number	false	1
memory	Specify the amount of memory for requests and limits.	string	false	2048Mi
requests	Specify the resources in requests.	requests	false
limits	Specify the resources in limits.	limits	false

Name	Description	Type	Required	Default
cpu	Specify the amount of cpu for requests.	number	false	1
memory	Specify the amount of memory for requests.	string	false	2048Mi

Name	Description	Type	Required	Default
cpu	Specify the amount of cpu for limits.	number	false	1
memory	Specify the amount of memory for limits.	string	false	2048Mi

Manually scale K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: website
spec:
  components:
    - name: frontend
      type: webservice
      properties:
        image: nginx
      traits:
        - type: scaler
          properties:
            replicas: 2
        - type: sidecar
          properties:
            name: "sidecar-test"
            image: "fluentd"
    - name: backend
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'

Name	Description	Type	Required	Default
replicas	Specify the number of workload.	int	false	1

Specify serviceAccount for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: vela-doc
  namespace: vela-system
spec:
  components:
    - name: frontend
      type: webservice
      properties:
        image: oamdev/vela-cli:v1.5.0-beta.1
        cmd: ["/bin/vela","show"]
        ports:
          - port: 18081
            expose: true
      traits:
        - type: service-account
          properties:
            name: kubevela-vela-core

Name	Description	Type	Required	Default
name	Specify the name of ServiceAccount.	string	true
create	Specify whether to create new ServiceAccount or not.	bool	false	false
privileges	Specify the privileges of the ServiceAccount, if not empty, RoleBindings(ClusterRoleBindings) will be created.	[]privileges	false

Name	Description	Type	Required	Default
verbs	Specify the verbs to be allowed for the resource.	[]string	true
apiGroups	Specify the apiGroups of the resource.	[]string	false
resources	Specify the resources to be allowed.	[]string	false
resourceNames	Specify the resourceNames to be allowed.	[]string	false
nonResourceURLs	Specify the resource url to be allowed.	[]string	false
scope	Specify the scope of the privileges, default to be namespace scope.	“namespace” or “cluster”	false	namespace

Binding secrets of cloud resources to component env. This definition is DEPRECATED, please use ‘storage’ instead.

For now this trait is hidden from the VelaUX. Available when using CLI

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

Prepare a Kubernetes Secret

The secret can be manually created, or generated by other component or external system.

For example, we have a secret db-conn-example whose data is as below:

endpoint: https://xxx.com
password: 123
username: myname

Bind the Secret into your component by service-binding trait

For example, we have a webservice component who needs to consume a database. The database connection string should be set to Pod environments: endpoint, username and DB_PASSWORD.

We can set the properties for envMappings as below. For each environment, secret represents the secret name, and key represents the key of the secret.

Here is the complete properties for the trait.

traits:
- type: service-binding
  properties:
    envMappings:
      DB_PASSWORD:
        secret: db-conn-example
        key: password            
      endpoint:
        secret: db-conn-example
        key: endpoint
      username:
        secret: db-conn-example
        key: username

In particular, if the environment name, like endpoint, is same to the key of the secret, we can omit the key. So we can simplify the properties as below.

traits:
- type: service-binding
  properties:
    envMappings:
      DB_PASSWORD:
        secret: db-conn-example
        key: password            
      endpoint:
        secret: db-conn-example
      username:
        secret: db-conn-example

We can finally prepare an Application for the business component binding-test-comp to consume the secret, which is a representative of a database cloud resource.

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: webapp
spec:
  components:
    - name: binding-test-comp
      type: webservice
      properties:
        image: zzxwill/flask-web-application:v0.3.1-crossplane
        ports: 80
      traits:
        - type: service-binding
          properties:
            envMappings:
              # environments refer to db-conn secret
              DB_PASSWORD:
                secret: db-conn-example
                key: password            
              endpoint:
                secret: db-conn-example
              username:
                secret: db-conn-example

Deploy this YAML and the Secret db-conn-example will be binding into environment of workload.

Name	Description	Type	Required	Default
envMappings	The mapping of environment variables to secret.	map[string]KeySecret(#keysecret-service-binding)	true

Name	Description	Type	Required	Default
key		string	false
secret		string	true

Inject a sidecar container to K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: vela-app-with-sidecar
spec:
  components:
    - name: log-gen-worker
      type: worker
      properties:
        image: busybox
        cmd:
          - /bin/sh
          - -c
          - >
            i=0;
            while true;
            do
              echo "$i: $(date)" >> /var/log/date.log;
              i=$((i+1));
              sleep 1;
            done
        volumes:
          - name: varlog
            mountPath: /var/log
            type: emptyDir
      traits:
        - type: sidecar
          properties:
            name: count-log
            image: busybox
            cmd: [ /bin/sh, -c, 'tail -n+1 -f /var/log/date.log']
            volumes:
              - name: varlog
                path: /var/log

Name	Description	Type	Required
name	Specify the name of sidecar container.	string	true
image	Specify the image of sidecar container.	string	true
cmd	Specify the commands run in the sidecar.	[]string	false
args	Specify the args in the sidecar.	[]string	false
env	Specify the env in the sidecar.	[]env	false
volumes	Specify the shared volume path.	[]volumes	false
livenessProbe	Instructions for assessing whether the container is alive.	livenessProbe	false
readinessProbe	Instructions for assessing whether the container is in a suitable state to serve traffic.	readinessProbe	false

Name	Description	Type	Required
name	Environment variable name.	string	true
value	The value of the environment variable.	string	false
valueFrom	Specifies a source the value of this var should come from.	valueFrom	false

Name	Description	Type	Required
secretKeyRef	Selects a key of a secret in the pod’s namespace.	secretKeyRef	false
configMapKeyRef	Selects a key of a config map in the pod’s namespace.	configMapKeyRef	false
fieldRef	Specify the field reference for env.	fieldRef	false

Name	Description	Type	Required	Default
name	The name of the secret in the pod’s namespace to select from.	string	true
key	The key of the secret to select from. Must be a valid secret key.	string	true

Name	Description	Type	Required	Default
name	The name of the config map in the pod’s namespace to select from.	string	true
key	The key of the config map to select from. Must be a valid secret key.	string	true

Name	Description	Type	Required	Default
fieldPath	Specify the field path for env.	string	true

Name	Description	Type	Required	Default
name		string	true
path		string	true

Name	Description	Type	Required	Default
exec	Instructions for assessing container health by executing a command. Either this attribute or the httpGet attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the httpGet attribute and the tcpSocket attribute.	exec	false
httpGet	Instructions for assessing container health by executing an HTTP GET request. Either this attribute or the exec attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the tcpSocket attribute.	httpGet	false
tcpSocket	Instructions for assessing container health by probing a TCP socket. Either this attribute or the exec attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the httpGet attribute.	tcpSocket	false
initialDelaySeconds	Number of seconds after the container is started before the first probe is initiated.	int	false	0
periodSeconds	How often, in seconds, to execute the probe.	int	false	10
timeoutSeconds	Number of seconds after which the probe times out.	int	false	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed.	int	false	1
failureThreshold	Number of consecutive failures required to determine the container is not alive (liveness probe) or not ready (readiness probe).	int	false	3

Name	Description	Type	Required	Default
command	A command to be executed inside the container to assess its health. Each space delimited token of the command is a separate array element. Commands exiting 0 are considered to be successful probes, whilst all other exit codes are considered failures.	[]string	true

Name	Description	Type	Required
path	The endpoint, relative to the port, to which the HTTP GET request should be directed.	string	true
port	The TCP socket within the container to which the HTTP GET request should be directed.	int	true
httpHeaders		[]httpHeaders	false

Name	Description	Type	Required	Default
name		string	true
value		string	true

Name	Description	Type	Required	Default
port	The TCP socket within the container that should be probed to assess container health.	int	true

Name	Description	Type	Required	Default
exec	Instructions for assessing container health by executing a command. Either this attribute or the httpGet attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the httpGet attribute and the tcpSocket attribute.	exec	false
httpGet	Instructions for assessing container health by executing an HTTP GET request. Either this attribute or the exec attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the tcpSocket attribute.	httpGet	false
tcpSocket	Instructions for assessing container health by probing a TCP socket. Either this attribute or the exec attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with both the exec attribute and the httpGet attribute.	tcpSocket	false
initialDelaySeconds	Number of seconds after the container is started before the first probe is initiated.	int	false	0
periodSeconds	How often, in seconds, to execute the probe.	int	false	10
timeoutSeconds	Number of seconds after which the probe times out.	int	false	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed.	int	false	1
failureThreshold	Number of consecutive failures required to determine the container is not alive (liveness probe) or not ready (readiness probe).	int	false	3

Name	Description	Type	Required	Default
command	A command to be executed inside the container to assess its health. Each space delimited token of the command is a separate array element. Commands exiting 0 are considered to be successful probes, whilst all other exit codes are considered failures.	[]string	true

Name	Description	Type	Required
path	The endpoint, relative to the port, to which the HTTP GET request should be directed.	string	true
port	The TCP socket within the container to which the HTTP GET request should be directed.	int	true
httpHeaders		[]httpHeaders	false

Name	Description	Type	Required	Default
name		string	true
value		string	true

Name	Description	Type	Required	Default
port	The TCP socket within the container that should be probed to assess container health.	int	true

Add startup probe hooks for the specified container of K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-with-startup-probe
spec:
  components:
    - name: busybox-runner
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'
      traits:
      - type: sidecar
        properties:
          name: nginx
          image: nginx
      # This startup-probe is blocking the startup of the main container 
      # as the URL has a typo '.comm' vs '.com'
      - type: startup-probe
        properties:
          containerName: "busybox-runner"
          httpGet:
            host: "www.guidewire.comm"
            scheme: "HTTPS"
            port: 443
          periodSeconds: 4
          failureThreshold: 4  
      # This startup probe targets the nginx sidecar
      - type: startup-probe
        properties:
          containerName: nginx
          httpGet:
            host: "www.guidewire.com"
            scheme: "HTTPS"
            port: 443
          periodSeconds: 5
          failureThreshold: 5

Name	Description	Type	Required	Default
	StartupProbeParams or type-option-2	false

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
initialDelaySeconds	Number of seconds after the container has started before liveness probes are initiated. Minimum value is 0.	int	false	0
periodSeconds	How often, in seconds, to execute the probe. Minimum value is 1.	int	false	10
timeoutSeconds	Number of seconds after which the probe times out. Minimum value is 1.	int	false	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed. Minimum value is 1.	int	false	1
failureThreshold	Minimum consecutive failures for the probe to be considered failed after having succeeded. Minimum value is 1.	int	false	3
terminationGracePeriodSeconds	Optional duration in seconds the pod needs to terminate gracefully upon probe failure. Set this value longer than the expected cleanup time for your process.	int	false
exec	Instructions for assessing container startup status by executing a command. Either this attribute or the httpGet attribute or the grpc attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with the httpGet attribute and the tcpSocket attribute and the gRPC attribute.	exec	false
httpGet	Instructions for assessing container startup status by executing an HTTP GET request. Either this attribute or the exec attribute or the grpc attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with the exec attribute and the tcpSocket attribute and the gRPC attribute.	httpGet	false
grpc	Instructions for assessing container startup status by probing a gRPC service. Either this attribute or the exec attribute or the grpc attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with the exec attribute and the httpGet attribute and the tcpSocket attribute.	grpc	false
tcpSocket	Instructions for assessing container startup status by probing a TCP socket. Either this attribute or the exec attribute or the tcpSocket attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with the exec attribute and the httpGet attribute and the gRPC attribute.	tcpSocket	false

Name	Description	Type	Required	Default
command	A command to be executed inside the container to assess its health. Each space delimited token of the command is a separate array element. Commands exiting 0 are considered to be successful probes, whilst all other exit codes are considered failures.	[]string	true

Name	Description	Type	Required	Default
path	The endpoint, relative to the port, to which the HTTP GET request should be directed.	string	false
port	The port numer to access on the host or container.	int	true
host	The hostname to connect to, defaults to the pod IP. You probably want to set “Host” in httpHeaders instead.	string	false
scheme	The Scheme to use for connecting to the host.	“HTTP” or “HTTPS”	false	HTTP
httpHeaders	Custom headers to set in the request. HTTP allows repeated headers.	[]httpHeaders	false

Name	Description	Type	Required	Default
name	The header field name.	string	true
value	The header field value.	string	true

Name	Description	Type	Required	Default
port	The port number of the gRPC service.	int	true
service	The name of the service to place in the gRPC HealthCheckRequest.	string	false

Name	Description	Type	Required	Default
port	Number or name of the port to access on the container.	string	true
host	Host name to connect to, defaults to the pod IP.	string	false

Name	Description	Type	Required	Default
probes	Specify the startup probe for multiple containers.	[]probes	true

Name	Description	Type	Required	Default
containerName	Specify the name of the target container, if not set, use the component name.	string	false	empty
initialDelaySeconds	Number of seconds after the container has started before liveness probes are initiated. Minimum value is 0.	int	false	0
periodSeconds	How often, in seconds, to execute the probe. Minimum value is 1.	int	false	10
timeoutSeconds	Number of seconds after which the probe times out. Minimum value is 1.	int	false	1
successThreshold	Minimum consecutive successes for the probe to be considered successful after having failed. Minimum value is 1.	int	false	1
failureThreshold	Minimum consecutive failures for the probe to be considered failed after having succeeded. Minimum value is 1.	int	false	3
terminationGracePeriodSeconds	Optional duration in seconds the pod needs to terminate gracefully upon probe failure. Set this value longer than the expected cleanup time for your process.	int	false
exec	Instructions for assessing container startup status by executing a command. Either this attribute or the httpGet attribute or the grpc attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with the httpGet attribute and the tcpSocket attribute and the gRPC attribute.	exec	false
httpGet	Instructions for assessing container startup status by executing an HTTP GET request. Either this attribute or the exec attribute or the grpc attribute or the tcpSocket attribute MUST be specified. This attribute is mutually exclusive with the exec attribute and the tcpSocket attribute and the gRPC attribute.	httpGet	false
grpc	Instructions for assessing container startup status by probing a gRPC service. Either this attribute or the exec attribute or the grpc attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with the exec attribute and the httpGet attribute and the tcpSocket attribute.	grpc	false
tcpSocket	Instructions for assessing container startup status by probing a TCP socket. Either this attribute or the exec attribute or the tcpSocket attribute or the httpGet attribute MUST be specified. This attribute is mutually exclusive with the exec attribute and the httpGet attribute and the gRPC attribute.	tcpSocket	false

Name	Description	Type	Required	Default
command	A command to be executed inside the container to assess its health. Each space delimited token of the command is a separate array element. Commands exiting 0 are considered to be successful probes, whilst all other exit codes are considered failures.	[]string	true

Name	Description	Type	Required	Default
path	The endpoint, relative to the port, to which the HTTP GET request should be directed.	string	false
port	The port numer to access on the host or container.	int	true
host	The hostname to connect to, defaults to the pod IP. You probably want to set “Host” in httpHeaders instead.	string	false
scheme	The Scheme to use for connecting to the host.	“HTTP” or “HTTPS”	false	HTTP
httpHeaders	Custom headers to set in the request. HTTP allows repeated headers.	[]httpHeaders	false

Name	Description	Type	Required	Default
name	The header field name.	string	true
value	The header field value.	string	true

Name	Description	Type	Required	Default
port	The port number of the gRPC service.	int	true
service	The name of the service to place in the gRPC HealthCheckRequest.	string	false

Name	Description	Type	Required	Default
port	Number or name of the port to access on the container.	string	true
host	Host name to connect to, defaults to the pod IP.	string	false

Add storages on K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

# sample.yaml
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: storage-app
spec:
  components:
    - name: express-server
      type: webservice
      properties:
        image: oamdev/hello-world
        ports:
          - port: 8000
      traits:
        - type: storage
          properties:
            # PVC type storage
            pvc:
              - name: test1
                mountPath: /test/mount/pvc
            # EmptyDir type storage
            emptyDir:
              - name: test1
                mountPath: /test/mount/emptydir
            # ConfigMap type storage
            configMap:
              - name: test1
                mountPath: /test/mount/cm
                # Mount ConfigMap to Env
                mountToEnv:
                  envName: TEST_ENV
                  configMapKey: key1
                data:
                  key1: value1
                  key2: value2
            # Secret type storage
            secret:
              - name: test1
                mountPath: /test/mount/secret
                # Mount Secret to Env
                mountToEnv:
                  envName: TEST_SECRET
                  secretKey: key1
                data:
                  key1: dmFsdWUx
                  key2: dmFsdWUy

Name	Description	Type	Required
pvc	Declare pvc type storage.	[]pvc	false
configMap	Declare config map type storage.	[]configMap	false
secret	Declare secret type storage.	[]secret	false
emptyDir	Declare empty dir type storage.	[]emptyDir	false
hostPath	Declare host path type storage.	[]hostPath	false

Name	Type	Required	Default
name	string	true
mountOnly	bool	false	false
mountPath	string	true
subPath	string	false
volumeMode	string	false	Filesystem
volumeName	string	false
accessModes	[]string	true
storageClassName	string	false
resources	resources	false
dataSourceRef	dataSourceRef	false
dataSource	dataSource	false
selector	selector	false

Name	Description	Type	Required	Default
requests		requests	true
limits		limits	false

Name	Description	Type	Required	Default
storage		string	true

Name	Description	Type	Required	Default
storage		string	true

Name	Type	Required
name	string	true
kind	string	true
apiGroup	string	true

Name	Type	Required
name	string	true
kind	string	true
apiGroup	string	true

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		matchExpressions	false

Name	Type	Required
key	string	true
values	[]string	true
operator	string	true

Name	Type	Required	Default
name	string	true
mountOnly	bool	false	false
mountToEnv	mountToEnv	false
mountToEnvs	[]mountToEnvs	false
mountPath	string	false
subPath	string	false
defaultMode	int	false	420
readOnly	bool	false	false
data	map[string]_	false
items	[]items	false

Name	Description	Type	Required	Default
envName		string	true
configMapKey		string	true

Name	Description	Type	Required	Default
envName		string	true
configMapKey		string	true

Name	Type	Required	Default
key	string	true
path	string	true
mode	int	false	511

Name	Type	Required	Default
name	string	true
mountOnly	bool	false	false
mountToEnv	mountToEnv	false
mountToEnvs	[]mountToEnvs	false
mountPath	string	false
subPath	string	false
defaultMode	int	false	420
readOnly	bool	false	false
stringData	map[string]	false
data	map[string]	false
items	[]items	false

Name	Description	Type	Required	Default
envName		string	true
secretKey		string	true

Name	Description	Type	Required	Default
envName		string	true
secretKey		string	true

Name	Type	Required	Default
key	string	true
path	string	true
mode	int	false	511

Name	Type	Required	Default
name	string	true
mountPath	string	true
subPath	string	false
medium	“” or “Memory”	false	empty

Name	Type	Required	Default
name	string	true
path	string	true
mountPath	string	true
type	“Directory” or “DirectoryOrCreate” or “FileOrCreate” or “File” or “Socket” or “CharDevice” or “BlockDevice”	false	Directory

Add topology spread constraints hooks for every container of K8s pod for your workload which follows the pod spec in path ‘spec.template’.

Component based on the following kinds of resources:

deployments.apps
statefulsets.apps
daemonsets.apps
jobs.batch

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: application-with-topologyspreadconstraints
spec:
  components:
    - name: busybox-runner
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000'
      traits:
      - type: topologyspreadconstraints
        properties:
          constraints: 
          - topologyKey: zone
            labelSelector:
              matchLabels: 
                zone: us-east-1a
            maxSkew: 1
            whenUnsatisfiable: DoNotSchedule
            minDomains: 1
            nodeAffinityPolicy: Ignore
            nodeTaintsPolicy: Ignore
          - topologyKey: node
            labelSelector:
              matchExpressions:
                - key: foo 
                  operator: In
                  values: 
                  - abc
            maxSkew: 1
            whenUnsatisfiable: ScheduleAnyway 
            minDomains: 1
            nodeAffinityPolicy: Ignore
            nodeTaintsPolicy: Ignore

Name	Description	Type	Required	Default
constraints		[]constraints	true

Name	Description	Type	Required	Default
maxSkew	Describe the degree to which Pods may be unevenly distributed.	int	true
topologyKey	Specify the key of node labels.	string	true
whenUnsatisfiable	Indicate how to deal with a Pod if it doesn’t satisfy the spread constraint.	“DoNotSchedule” or “ScheduleAnyway”	false	DoNotSchedule
labelSelector		labelSelector	true
minDomains	Indicate a minimum number of eligible domains.	int	false
matchLabelKeys	A list of pod label keys to select the pods over which spreading will be calculated.	[]string	false
nodeAffinityPolicy	Indicate how we will treat Pod’s nodeAffinity/nodeSelector when calculating pod topology spread skew.	“Honor” or “Ignore”	false	Honor
nodeTaintsPolicy	Indicate how we will treat node taints when calculating pod topology spread skew.	“Honor” or “Ignore”	false	Honor

Name	Description	Type	Required	Default
matchLabels		map[string]string	false
matchExpressions		[]matchExpressions	false

Name	Type	Required	Default
key	string	true
operator	“In” or “NotIn” or “Exists” or “DoesNotExist”	false	In
values	[]string	false

Last updated on May 6, 2023 by Tianxin Dong