Setting up the environment for an OpenShift installation

Installing Fedora on the provisioner node

With the configuration of the prerequisites complete, the next step is to install Fedora 35 on the provisioner node. The installer uses the provisioner node as the orchestrator while installing the OKD cluster. For the purposes of this document, installing Fedora on the provisioner node is out of scope. However, options include but are not limited to using a RHEL Satellite server, PXE, or installation media.

Preparing the provisioner node for OKD installation

Perform the following steps to prepare the environment.

Procedure

1. Log in to the provisioner node via ssh.

2. Create a non-root user (kni) and provide that user with sudo privileges:

   # useradd kni

   # passwd kni

   # echo "kni ALL=(root) NOPASSWD:ALL" | tee -a /etc/sudoers.d/kni

   # chmod 0440 /etc/sudoers.d/kni

3. Create an ssh key for the new user:

   # su - kni -c "ssh-keygen -t ed25519 -f /home/kni/.ssh/id_rsa -N ''"

4. Log in as the new user on the provisioner node:

   # su - kni

5. Install the following packages:

   $ sudo dnf install -y libvirt qemu-kvm mkisofs python3-devel jq ipmitool

6. Modify the user to add the libvirt group to the newly created user:

   $ sudo usermod --append --groups libvirt <user>

7. Restart firewalld and enable the http service:

   $ sudo systemctl start firewalld

   $ sudo firewall-cmd --zone=public --add-service=http --permanent

   $ sudo firewall-cmd --reload

8. Start and enable the libvirtd service:

   $ sudo systemctl enable libvirtd --now

9. Create the default storage pool and start it:

   $ sudo virsh pool-define-as --name default --type dir --target /var/lib/libvirt/images

   $ sudo virsh pool-start default

   $ sudo virsh pool-autostart default

10. Create a pull-secret.txt file:

    $ vim pull-secret.txt

    In a web browser, navigate to Install OpenShift on Bare Metal with installer-provisioned infrastructure. Click Copy pull secret. Paste the contents into the pull-secret.txt file and save the contents in the kni user’s home directory.

Checking NTP server synchronization

The OKD installation program installs the chrony Network Time Protocol (NTP) service on the cluster nodes. To complete installation, each node must have access to an NTP time server. You can verify NTP server synchronization by using the chrony service.

For disconnected clusters, you must configure the NTP servers on the control plane nodes. For more information see the Additional resources section.

Prerequisites

• You installed the chrony package on the target node.

Procedure

1. Log in to the node by using the ssh command.

2. View the NTP servers available to the node by running the following command:

   $ chronyc sources

   Example output

   MS Name/IP address         Stratum Poll Reach LastRx Last sample
   ===============================================================================
   ^+ time.cloudflare.com           3  10   377   187   -209us[ -209us] +/-   32ms
   ^+ t1.time.ir2.yahoo.com         2  10   377   185  -4382us[-4382us] +/-   23ms
   ^+ time.cloudflare.com           3  10   377   198   -996us[-1220us] +/-   33ms
   ^* brenbox.westnet.ie            1  10   377   193  -9538us[-9761us] +/-   24ms

3. Use the ping command to ensure that the node can access an NTP server, for example:

   $ ping time.cloudflare.com

   Example output

   PING time.cloudflare.com (162.159.200.123) 56(84) bytes of data.
   64 bytes from time.cloudflare.com (162.159.200.123): icmp_seq=1 ttl=54 time=32.3 ms
   64 bytes from time.cloudflare.com (162.159.200.123): icmp_seq=2 ttl=54 time=30.9 ms
   64 bytes from time.cloudflare.com (162.159.200.123): icmp_seq=3 ttl=54 time=36.7 ms
   ...

Additional resources

• Optional: Configuring NTP for disconnected clusters

• Network Time Protocol (NTP)

Configuring networking

Before installation, you must configure the networking on the provisioner node. Installer-provisioned clusters deploy with a bare-metal bridge and network, and an optional provisioning bridge and network.

Procedure

1. Export the bare-metal network NIC name:

   $ export PUB_CONN=<baremetal_nic_name>

2. Configure the bare-metal network:

   The SSH connection might disconnect after executing these steps.

   $ sudo nohup bash -c "
       nmcli con down \"$PUB_CONN\"
       nmcli con delete \"$PUB_CONN\"
       # RHEL 8.1 appends the word \"System\" in front of the connection, delete in case it exists
       nmcli con down \"System $PUB_CONN\"
       nmcli con delete \"System $PUB_CONN\"
       nmcli connection add ifname baremetal type bridge con-name baremetal bridge.stp no
       nmcli con add type bridge-slave ifname \"$PUB_CONN\" master baremetal
       pkill dhclient;dhclient baremetal
   "

3. Optional: If you are deploying with a provisioning network, export the provisioning network NIC name:

   $ export PROV_CONN=<prov_nic_name>

4. Optional: If you are deploying with a provisioning network, configure the provisioning network:

   $ sudo nohup bash -c "
       nmcli con down \"$PROV_CONN\"
       nmcli con delete \"$PROV_CONN\"
       nmcli connection add ifname provisioning type bridge con-name provisioning
       nmcli con add type bridge-slave ifname \"$PROV_CONN\" master provisioning
       nmcli connection modify provisioning ipv6.addresses fd00:1101::1/64 ipv6.method manual
       nmcli con down provisioning
       nmcli con up provisioning
   "

   The ssh connection might disconnect after executing these steps. The IPv6 address can be any address as long as it is not routable via the bare-metal network. Ensure that UEFI is enabled and UEFI PXE settings are set to the IPv6 protocol when using IPv6 addressing.

5. Optional: If you are deploying with a provisioning network, configure the IPv4 address on the provisioning network connection:

   $ nmcli connection modify provisioning ipv4.addresses 172.22.0.254/24 ipv4.method manual

6. ssh back into the provisioner node (if required):

   # ssh kni@provisioner.<cluster-name>.<domain>

7. Verify the connection bridges have been properly created:

   $ sudo nmcli con show

   NAME               UUID                                  TYPE      DEVICE
   baremetal          4d5133a5-8351-4bb9-bfd4-3af264801530  bridge    baremetal
   provisioning       43942805-017f-4d7d-a2c2-7cb3324482ed  bridge    provisioning
   virbr0             d9bca40f-eee1-410b-8879-a2d4bb0465e7  bridge    virbr0
   bridge-slave-eno1  76a8ed50-c7e5-4999-b4f6-6d9014dd0812  ethernet  eno1
   bridge-slave-eno2  f31c3353-54b7-48de-893a-02d2b34c4736  ethernet  eno2

Establishing communication between subnets

In a typical OKD cluster setup, all nodes, including the control plane and worker nodes, reside in the same network. However, for edge computing scenarios, it can be beneficial to locate worker nodes closer to the edge. This often involves using different network segments or subnets for the remote worker nodes than the subnet used by the control plane and local worker nodes. Such a setup can reduce latency for the edge and allow for enhanced scalability. However, the network must be configured properly before installing OKD to ensure that the edge subnets containing the remote worker nodes can reach the subnet containing the control plane nodes and receive traffic from the control plane too.

This procedure details the network configuration required to allow the remote worker nodes in the second subnet to communicate effectively with the control plane nodes in the first subnet and to allow the control plane nodes in the first subnet to communicate effectively with the remote worker nodes in the second subnet.

In this procedure, the cluster spans two subnets:

• The first subnet (10.0.0.0) contains the control plane and local worker nodes.

• The second subnet (192.168.0.0) contains the edge worker nodes.

Procedure

1. Configure the first subnet to communicate with the second subnet:

   1. Log in as root to a control plane node by running the following command:

      $ sudo su -

   2. Get the name of the network interface:

      # nmcli dev status

   3. Add a route to the second subnet (192.168.0.0) via the gateway: s+

# nmcli connection modify <interface_name> +ipv4.routes "192.168.0.0/24 via <gateway>"

+ Replace <interface_name> with the interface name. Replace <gateway> with the IP address of the actual gateway.

+ .Example

+

# nmcli connection modify eth0 +ipv4.routes "192.168.0.0/24 via 192.168.0.1"

1. Apply the changes:

   # nmcli connection up <interface_name>

   Replace <interface_name> with the interface name.

2. Verify the routing table to ensure the route has been added successfully:

   # ip route

3. Repeat the previous steps for each control plane node in the first subnet.

   Adjust the commands to match your actual interface names and gateway.

   1. Configure the second subnet to communicate with the first subnet:

4. Log in as root to a remote worker node:

   $ sudo su -

5. Get the name of the network interface:

   # nmcli dev status

6. Add a route to the first subnet (10.0.0.0) via the gateway:

   # nmcli connection modify <interface_name> +ipv4.routes "10.0.0.0/24 via <gateway>"

   Replace <interface_name> with the interface name. Replace <gateway> with the IP address of the actual gateway.

   Example

   # nmcli connection modify eth0 +ipv4.routes "10.0.0.0/24 via 10.0.0.1"

7. Apply the changes:

   # nmcli connection up <interface_name>

   Replace <interface_name> with the interface name.

8. Verify the routing table to ensure the route has been added successfully:

   # ip route

9. Repeat the previous steps for each worker node in the second subnet.

   Adjust the commands to match your actual interface names and gateway.

   1. Once you have configured the networks, test the connectivity to ensure the remote worker nodes can reach the control plane nodes and the control plane nodes can reach the remote worker nodes.

10. From the control plane nodes in the first subnet, ping a remote worker node in the second subnet:

    $ ping <remote_worker_node_ip_address>

    If the ping is successful, it means the control plane nodes in the first subnet can reach the remote worker nodes in the second subnet. If you don’t receive a response, review the network configurations and repeat the procedure for the node.

11. From the remote worker nodes in the second subnet, ping a control plane node in the first subnet:

    $ ping <control_plane_node_ip_address>

    If the ping is successful, it means the remote worker nodes in the second subnet can reach the control plane in the first subnet. If you don’t receive a response, review the network configurations and repeat the procedure for the node.

Retrieving the OKD installer

Use the stable-4.x version of the installation program and your selected architecture to deploy the generally available stable version of OKD:

$ export VERSION=stable-4

$ export RELEASE_ARCH=<architecture>

$ export RELEASE_IMAGE=$(curl -s https://mirror.openshift.com/pub/openshift-v4/$RELEASE_ARCH/clients/ocp/$VERSION/release.txt | grep 'Pull From: quay.io' | awk -F ' ' '{print $3}')

Extracting the OKD installer

After retrieving the installer, the next step is to extract it.

Procedure

1. Set the environment variables:

   $ export cmd=openshift-baremetal-install

   $ export pullsecret_file=~/pull-secret.txt

   $ export extract_dir=$(pwd)

2. Get the oc binary:

   $ curl -s https://mirror.openshift.com/pub/openshift-v4/clients/ocp/$VERSION/openshift-client-linux.tar.gz | tar zxvf - oc

3. Extract the installer:

   $ sudo cp oc /usr/local/bin

   $ oc adm release extract --registry-config "${pullsecret_file}" --command=$cmd --to "${extract_dir}" ${RELEASE_IMAGE}

   $ sudo cp openshift-baremetal-install /usr/local/bin

Optional: Creating an FCOS images cache

To employ image caching, you must download the Fedora CoreOS (FCOS) image used by the bootstrap VM to provision the cluster nodes. Image caching is optional, but it is especially useful when running the installation program on a network with limited bandwidth.

If you are running the installation program on a network with limited bandwidth and the FCOS images download takes more than 15 to 20 minutes, the installation program will timeout. Caching images on a web server will help in such scenarios.

Install a container that contains the images.

Procedure

1. Install podman:

   $ sudo dnf install -y podman

2. Open firewall port 8080 to be used for FCOS image caching:

   $ sudo firewall-cmd --add-port=8080/tcp --zone=public --permanent

   $ sudo firewall-cmd --reload

3. Create a directory to store the bootstraposimage:

   $ mkdir /home/kni/rhcos_image_cache

4. Set the appropriate SELinux context for the newly created directory:

   $ sudo semanage fcontext -a -t httpd_sys_content_t "/home/kni/rhcos_image_cache(/.*)?"

   $ sudo restorecon -Rv /home/kni/rhcos_image_cache/

5. Get the URI for the FCOS image that the installation program will deploy on the bootstrap VM:

   $ export RHCOS_QEMU_URI=$(/usr/local/bin/openshift-baremetal-install coreos print-stream-json | jq -r --arg ARCH "$(arch)" '.architectures[$ARCH].artifacts.qemu.formats["qcow2.gz"].disk.location')

6. Get the name of the image that the installation program will deploy on the bootstrap VM:

   $ export RHCOS_QEMU_NAME=${RHCOS_QEMU_URI##*/}

7. Get the SHA hash for the FCOS image that will be deployed on the bootstrap VM:

   $ export RHCOS_QEMU_UNCOMPRESSED_SHA256=$(/usr/local/bin/openshift-baremetal-install coreos print-stream-json | jq -r --arg ARCH "$(arch)" '.architectures[$ARCH].artifacts.qemu.formats["qcow2.gz"].disk["uncompressed-sha256"]')

8. Download the image and place it in the /home/kni/rhcos_image_cache directory:

   $ curl -L ${RHCOS_QEMU_URI} -o /home/kni/rhcos_image_cache/${RHCOS_QEMU_NAME}

9. Confirm SELinux type is of httpd_sys_content_t for the new file:

   $ ls -Z /home/kni/rhcos_image_cache

10. Create the pod:

    $ podman run -d --name rhcos_image_cache \ (1)
    -v /home/kni/rhcos_image_cache:/var/www/html \
    -p 8080:8080/tcp \
    quay.io/centos7/httpd-24-centos7:latest

    1	Creates a caching webserver with the name rhcos_image_cache. This pod serves the bootstrapOSImage image in the install-config.yaml file for deployment.

11. Generate the bootstrapOSImage configuration:

    $ export BAREMETAL_IP=$(ip addr show dev baremetal | awk '/inet /{print $2}' | cut -d"/" -f1)

    $ export BOOTSTRAP_OS_IMAGE="http://${BAREMETAL_IP}:8080/${RHCOS_QEMU_NAME}?sha256=${RHCOS_QEMU_UNCOMPRESSED_SHA256}"

    $ echo "    bootstrapOSImage=${BOOTSTRAP_OS_IMAGE}"

12. Add the required configuration to the install-config.yaml file under platform.baremetal:

    platform:
     baremetal:
       bootstrapOSImage: <bootstrap_os_image>  (1)

    1	Replace <bootstrap_os_image> with the value of $BOOTSTRAP_OS_IMAGE.

    See the “Configuring the install-config.yaml file” section for additional details.

Configuring the install-config.yaml file

Configuring the install-config.yaml file

The install-config.yaml file requires some additional details. Most of the information teaches the installation program and the resulting cluster enough about the available hardware that it is able to fully manage it.

1. Configure install-config.yaml. Change the appropriate variables to match the environment, including pullSecret and sshKey:

   apiVersion: v1
   baseDomain: <domain>
   metadata:
     name: <cluster_name>
   networking:
     machineNetwork:
     - cidr: <public_cidr>
     networkType: OVNKubernetes
   compute:
   - name: worker
     replicas: 2 (1)
   controlPlane:
     name: master
     replicas: 3
     platform:
       baremetal: {}
   platform:
     baremetal:
       apiVIPs:
         - <api_ip>
       ingressVIPs:
         - <wildcard_ip>
       provisioningNetworkCIDR: <CIDR>
       bootstrapExternalStaticIP: <bootstrap_static_ip_address> (2)
       bootstrapExternalStaticGateway: <bootstrap_static_gateway> (3)
       hosts:
         - name: openshift-master-0
           role: master
           bmc:
             address: ipmi://<out_of_band_ip> (4)
             username: <user>
             password: <password>
           bootMACAddress: <NIC1_mac_address>
           rootDeviceHints:
            deviceName: "<installation_disk_drive_path>" (5)
         - name: <openshift_master_1>
           role: master
           bmc:
             address: ipmi://<out_of_band_ip>
             username: <user>
             password: <password>
           bootMACAddress: <NIC1_mac_address>
           rootDeviceHints:
            deviceName: "<installation_disk_drive_path>"
         - name: <openshift_master_2>
           role: master
           bmc:
             address: ipmi://<out_of_band_ip>
             username: <user>
             password: <password>
           bootMACAddress: <NIC1_mac_address>
           rootDeviceHints:
            deviceName: "<installation_disk_drive_path>"
         - name: <openshift_worker_0>
           role: worker
           bmc:
             address: ipmi://<out_of_band_ip>
             username: <user>
             password: <password>
           bootMACAddress: <NIC1_mac_address>
         - name: <openshift_worker_1>
           role: worker
           bmc:
             address: ipmi://<out_of_band_ip>
             username: <user>
             password: <password>
           bootMACAddress: <NIC1_mac_address>
           rootDeviceHints:
            deviceName: "<installation_disk_drive_path>"
   pullSecret: '<pull_secret>'
   sshKey: '<ssh_pub_key>'

   1	Scale the worker machines based on the number of worker nodes that are part of the OKD cluster. Valid options for the replicas value are 0 and integers greater than or equal to 2. Set the number of replicas to 0 to deploy a three-node cluster, which contains only three control plane machines. A three-node cluster is a smaller, more resource-efficient cluster that can be used for testing, development, and production. You cannot install the cluster with only one worker.
   2	When deploying a cluster with static IP addresses, you must set the bootstrapExternalStaticIP configuration setting to specify the static IP address of the bootstrap VM when there is no DHCP server on the bare-metal network.
   3	When deploying a cluster with static IP addresses, you must set the bootstrapExternalStaticGateway configuration setting to specify the gateway IP address for the bootstrap VM when there is no DHCP server on the bare-metal network.
   4	See the BMC addressing sections for more options.
   5	To set the path to the installation disk drive, enter the kernel name of the disk. For example, /dev/sda. Because the disk discovery order is not guaranteed, the kernel name of the disk can change across booting options for machines with multiple disks. For instance, /dev/sda becomes /dev/sdb and vice versa. To avoid this issue, you must use persistent disk attributes, such as the disk World Wide Name (WWN). To use the disk WWN, replace the deviceName parameter with the wwnWithExtension parameter. Depending on the parameter that you use, enter the disk name, for example, /dev/sda or the disk WWN, for example, “0x64cd98f04fde100024684cf3034da5c2”. Ensure that you enter the disk WWN value within quotes so that it is used as a string value and not a hexadecimal value. Failure to meet these requirements for the rootDeviceHints parameter might result in the following error: ironic-inspector inspection failed: No disks satisfied root device hints

   Before OKD 4.12, the cluster installation program only accepted an IPv4 address or and IPv6 address for the apiVIP and ingressVIP configuration settings. In OKD 4.12 and later, these configuration settings are deprecated. Instead, use a list format in the apiVIPs and ingressVIPs configuration settings to specify IPv4 addresses, IPv6 addresses or both IP address formats.

2. Create a directory to store the cluster configuration:

   $ mkdir ~/clusterconfigs

3. Copy the install-config.yaml file to the new directory:

   $ cp install-config.yaml ~/clusterconfigs

4. Ensure all bare metal nodes are powered off prior to installing the OKD cluster:

   $ ipmitool -I lanplus -U <user> -P <password> -H <management-server-ip> power off

5. Remove old bootstrap resources if any are left over from a previous deployment attempt:

   for i in $(sudo virsh list | tail -n +3 | grep bootstrap | awk {'print $2'});
   do
     sudo virsh destroy $i;
     sudo virsh undefine $i;
     sudo virsh vol-delete $i --pool $i;
     sudo virsh vol-delete $i.ign --pool $i;
     sudo virsh pool-destroy $i;
     sudo virsh pool-undefine $i;
   done

Additional install-config parameters

See the following tables for the required parameters, the hosts parameter, and the bmc parameter for the install-config.yaml file.

metadata:
    name:

networking:
    machineNetwork:
    - cidr:

compute:
  - name: worker

compute:
    replicas: 2

controlPlane:
    name: master

controlPlane:
    replicas: 3

Hosts

The hosts parameter is a list of separate bare metal assets used to build the cluster.

BMC addressing

Most vendors support Baseboard Management Controller (BMC) addressing with the Intelligent Platform Management Interface (IPMI). IPMI does not encrypt communications. It is suitable for use within a data center over a secured or dedicated management network. Check with your vendor to see if they support Redfish network boot. Redfish delivers simple and secure management for converged, hybrid IT and the Software Defined Data Center (SDDC). Redfish is human readable and machine capable, and leverages common internet and web services standards to expose information directly to the modern tool chain. If your hardware does not support Redfish network boot, use IPMI.

IPMI

Hosts using IPMI use the ipmi://<out-of-band-ip>:<port> address format, which defaults to port 623 if not specified. The following example demonstrates an IPMI configuration within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: ipmi://<out-of-band-ip>
          username: <user>
          password: <password>

Redfish network boot

To enable Redfish, use redfish:// or redfish+http:// to disable TLS. The installer requires both the hostname or the IP address and the path to the system ID. The following example demonstrates a Redfish configuration within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish://<out-of-band-ip>/redfish/v1/Systems/1
          username: <user>
          password: <password>

While it is recommended to have a certificate of authority for the out-of-band management addresses, you must include disableCertificateVerification: True in the bmc configuration if using self-signed certificates. The following example demonstrates a Redfish configuration using the disableCertificateVerification: True configuration parameter within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish://<out-of-band-ip>/redfish/v1/Systems/1
          username: <user>
          password: <password>
          disableCertificateVerification: True

Redfish APIs

Several redfish API endpoints are called onto your BCM when using the bare-metal installer-provisioned infrastructure.

List of redfish APIs

• Power on

  curl -u $USER:$PASS -X POST -H'Content-Type: application/json' -H'Accept: application/json' -d '{"Action": "Reset", "ResetType": "On"}' https://$SERVER/redfish/v1/Systems/$SystemID/Actions/ComputerSystem.Reset

• Power off

  curl -u $USER:$PASS -X POST -H'Content-Type: application/json' -H'Accept: application/json' -d '{"Action": "Reset", "ResetType": "ForceOff"}' https://$SERVER/redfish/v1/Systems/$SystemID/Actions/ComputerSystem.Reset

• Temporary boot using pxe

  curl -u $USER:$PASS -X PATCH -H "Content-Type: application/json"  https://$Server/redfish/v1/Systems/$SystemID/ -d '{"Boot": {"BootSourceOverrideTarget": "pxe", "BootSourceOverrideEnabled": "Once"}}

• Set BIOS boot mode using Legacy or UEFI

  curl -u $USER:$PASS -X PATCH -H "Content-Type: application/json"  https://$Server/redfish/v1/Systems/$SystemID/ -d '{"Boot": {"BootSourceOverrideMode":"UEFI"}}

List of redfish-virtualmedia APIs

• Set temporary boot device using cd or dvd

  curl -u $USER:$PASS -X PATCH -H "Content-Type: application/json" https://$Server/redfish/v1/Systems/$SystemID/ -d '{"Boot": {"BootSourceOverrideTarget": "cd", "BootSourceOverrideEnabled": "Once"}}'

• Mount virtual media

  curl -u $USER:$PASS -X PATCH -H "Content-Type: application/json" -H "If-Match: *" https://$Server/redfish/v1/Managers/$ManagerID/VirtualMedia/$VmediaId -d '{"Image": "https://example.com/test.iso", "TransferProtocolType": "HTTPS", "UserName": "", "Password":""}'

BMC addressing for Dell iDRAC

The address field for each bmc entry is a URL for connecting to the OKD cluster nodes, including the type of controller in the URL scheme and its location on the network.

platform:
  baremetal:
    hosts:
      - name: <hostname>
        role: <master | worker>
        bmc:
          address: <address> (1)
          username: <user>
          password: <password>

For Dell hardware, Red Hat supports integrated Dell Remote Access Controller (iDRAC) virtual media, Redfish network boot, and IPMI.

BMC address formats for Dell iDRAC

See the following sections for additional details.

Redfish virtual media for Dell iDRAC

For Redfish virtual media on Dell servers, use idrac-virtualmedia:// in the address setting. Using redfish-virtualmedia:// will not work.

The following example demonstrates using iDRAC virtual media within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: idrac-virtualmedia://<out-of-band-ip>/redfish/v1/Systems/System.Embedded.1
          username: <user>
          password: <password>

While it is recommended to have a certificate of authority for the out-of-band management addresses, you must include disableCertificateVerification: True in the bmc configuration if using self-signed certificates.

The following example demonstrates a Redfish configuration using the disableCertificateVerification: True configuration parameter within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: idrac-virtualmedia://<out-of-band-ip>/redfish/v1/Systems/System.Embedded.1
          username: <user>
          password: <password>
          disableCertificateVerification: True

Redfish network boot for iDRAC

To enable Redfish, use redfish:// or redfish+http:// to disable transport layer security (TLS). The installer requires both the hostname or the IP address and the path to the system ID. The following example demonstrates a Redfish configuration within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish://<out-of-band-ip>/redfish/v1/Systems/System.Embedded.1
          username: <user>
          password: <password>

While it is recommended to have a certificate of authority for the out-of-band management addresses, you must include disableCertificateVerification: True in the bmc configuration if using self-signed certificates. The following example demonstrates a Redfish configuration using the disableCertificateVerification: True configuration parameter within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish://<out-of-band-ip>/redfish/v1/Systems/System.Embedded.1
          username: <user>
          password: <password>
          disableCertificateVerification: True

BMC addressing for HPE iLO

The address field for each bmc entry is a URL for connecting to the OKD cluster nodes, including the type of controller in the URL scheme and its location on the network.

platform:
  baremetal:
    hosts:
      - name: <hostname>
        role: <master | worker>
        bmc:
          address: <address> (1)
          username: <user>
          password: <password>

For HPE integrated Lights Out (iLO), Red Hat supports Redfish virtual media, Redfish network boot, and IPMI.

See the following sections for additional details.

Redfish virtual media for HPE iLO

To enable Redfish virtual media for HPE servers, use redfish-virtualmedia:// in the address setting. The following example demonstrates using Redfish virtual media within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish-virtualmedia://<out-of-band-ip>/redfish/v1/Systems/1
          username: <user>
          password: <password>

While it is recommended to have a certificate of authority for the out-of-band management addresses, you must include disableCertificateVerification: True in the bmc configuration if using self-signed certificates. The following example demonstrates a Redfish configuration using the disableCertificateVerification: True configuration parameter within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish-virtualmedia://<out-of-band-ip>/redfish/v1/Systems/1
          username: <user>
          password: <password>
          disableCertificateVerification: True

Redfish network boot for HPE iLO

To enable Redfish, use redfish:// or redfish+http:// to disable TLS. The installer requires both the hostname or the IP address and the path to the system ID. The following example demonstrates a Redfish configuration within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish://<out-of-band-ip>/redfish/v1/Systems/1
          username: <user>
          password: <password>

While it is recommended to have a certificate of authority for the out-of-band management addresses, you must include disableCertificateVerification: True in the bmc configuration if using self-signed certificates. The following example demonstrates a Redfish configuration using the disableCertificateVerification: True configuration parameter within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: redfish://<out-of-band-ip>/redfish/v1/Systems/1
          username: <user>
          password: <password>
          disableCertificateVerification: True

BMC addressing for Fujitsu iRMC

The address field for each bmc entry is a URL for connecting to the OKD cluster nodes, including the type of controller in the URL scheme and its location on the network.

platform:
  baremetal:
    hosts:
      - name: <hostname>
        role: <master | worker>
        bmc:
          address: <address> (1)
          username: <user>
          password: <password>

For Fujitsu hardware, Red Hat supports integrated Remote Management Controller (iRMC) and IPMI.

iRMC

Fujitsu nodes can use irmc://<out-of-band-ip> and defaults to port 443. The following example demonstrates an iRMC configuration within the install-config.yaml file.

platform:
  baremetal:
    hosts:
      - name: openshift-master-0
        role: master
        bmc:
          address: irmc://<out-of-band-ip>
          username: <user>
          password: <password>

Root device hints

The rootDeviceHints parameter enables the installer to provision the Fedora CoreOS (FCOS) image to a particular device. The installer examines the devices in the order it discovers them, and compares the discovered values with the hint values. The installer uses the first discovered device that matches the hint value. The configuration can combine multiple hints, but a device must match all hints for the installer to select it.

Example usage

     - name: master-0
       role: master
       bmc:
         address: ipmi://10.10.0.3:6203
         username: admin
         password: redhat
       bootMACAddress: de:ad:be:ef:00:40
       rootDeviceHints:
         deviceName: "/dev/sda"

Optional: Setting proxy settings

To deploy an OKD cluster using a proxy, make the following changes to the install-config.yaml file.

apiVersion: v1
baseDomain: <domain>
proxy:
  httpProxy: http://USERNAME:PASSWORD@proxy.example.com:PORT
  httpsProxy: https://USERNAME:PASSWORD@proxy.example.com:PORT
  noProxy: <WILDCARD_OF_DOMAIN>,<PROVISIONING_NETWORK/CIDR>,<BMC_ADDRESS_RANGE/CIDR>

The following is an example of noProxy with values.

noProxy: .example.com,172.22.0.0/24,10.10.0.0/24

With a proxy enabled, set the appropriate values of the proxy in the corresponding key/value pair.

Key considerations:

• If the proxy does not have an HTTPS proxy, change the value of httpsProxy from https:// to http://.

• If using a provisioning network, include it in the noProxy setting, otherwise the installer will fail.

• Set all of the proxy settings as environment variables within the provisioner node. For example, HTTP_PROXY, HTTPS_PROXY, and NO_PROXY.

Optional: Deploying with no provisioning network

To deploy an OKD cluster without a provisioning network, make the following changes to the install-config.yaml file.

platform:
  baremetal:
    apiVIPs:
      - <api_VIP>
    ingressVIPs:
      - <ingress_VIP>
    provisioningNetwork: "Disabled" (1)

Optional: Deploying with dual-stack networking

For dual-stack networking in OKD clusters, you can configure IPv4 and IPv6 address endpoints for cluster nodes. To configure IPv4 and IPv6 address endpoints for cluster nodes, edit the machineNetwork, clusterNetwork, and serviceNetwork configuration settings in the install-config.yaml file. Each setting must have two CIDR entries each. For a cluster with the IPv4 family as the primary address family, specify the IPv4 setting first. For a cluster with the IPv6 family as the primary address family, specify the IPv6 setting first.

machineNetwork:
- cidr: {{ extcidrnet }}
- cidr: {{ extcidrnet6 }}
clusterNetwork:
- cidr: 10.128.0.0/14
  hostPrefix: 23
- cidr: fd02::/48
  hostPrefix: 64
serviceNetwork:
- 172.30.0.0/16
- fd03::/112

To provide an interface to the cluster for applications that use IPv4 and IPv6 addresses, configure IPv4 and IPv6 virtual IP (VIP) address endpoints for the Ingress VIP and API VIP services. To configure IPv4 and IPv6 address endpoints, edit the apiVIPs and ingressVIPs configuration settings in the install-config.yaml file . The apiVIPs and ingressVIPs configuration settings use a list format. The order of the list indicates the primary and secondary VIP address for each service.

platform:
  baremetal:
    apiVIPs:
      - <api_ipv4>
      - <api_ipv6>
    ingressVIPs:
      - <wildcard_ipv4>
      - <wildcard_ipv6>

Optional: Configuring host network interfaces

Before installation, you can set the networkConfig configuration setting in the install-config.yaml file to configure host network interfaces using NMState.

The most common use case for this functionality is to specify a static IP address on the bare-metal network, but you can also configure other networks such as a storage network. This functionality supports other NMState features such as VLAN, VXLAN, bridges, bonds, routes, MTU, and DNS resolver settings.

Prerequisites

• Configure a PTR DNS record with a valid hostname for each node with a static IP address.

• Install the NMState CLI (nmstate).

Procedure

1. Optional: Consider testing the NMState syntax with nmstatectl gc before including it in the install-config.yaml file, because the installer will not check the NMState YAML syntax.

   Errors in the YAML syntax might result in a failure to apply the network configuration. Additionally, maintaining the validated YAML syntax is useful when applying changes using Kubernetes NMState after deployment or when expanding the cluster.

   1. Create an NMState YAML file:

      interfaces:
      - name: <nic1_name> (1)
        type: ethernet
        state: up
        ipv4:
          address:
          - ip: <ip_address> (1)
            prefix-length: 24
          enabled: true
      dns-resolver:
        config:
          server:
          - <dns_ip_address> (1)
      routes:
        config:
        - destination: 0.0.0.0/0
          next-hop-address: <next_hop_ip_address> (1)
          next-hop-interface: <next_hop_nic1_name> (1)

      1	Replace <nic1_name>, <ip_address>, <dns_ip_address>, <next_hop_ip_address> and <next_hop_nic1_name> with appropriate values.

   2. Test the configuration file by running the following command:

      $ nmstatectl gc <nmstate_yaml_file>

      Replace <nmstate_yaml_file> with the configuration file name.

2. Use the networkConfig configuration setting by adding the NMState configuration to hosts within the install-config.yaml file:

       hosts:
         - name: openshift-master-0
           role: master
           bmc:
             address: redfish+http://<out_of_band_ip>/redfish/v1/Systems/
             username: <user>
             password: <password>
             disableCertificateVerification: null
           bootMACAddress: <NIC1_mac_address>
           bootMode: UEFI
           rootDeviceHints:
             deviceName: "/dev/sda"
           networkConfig: (1)
             interfaces:
             - name: <nic1_name> (2)
               type: ethernet
               state: up
               ipv4:
                 address:
                 - ip: <ip_address> (2)
                   prefix-length: 24
                 enabled: true
             dns-resolver:
               config:
                 server:
                 - <dns_ip_address> (2)
             routes:
               config:
               - destination: 0.0.0.0/0
                 next-hop-address: <next_hop_ip_address> (2)
                 next-hop-interface: <next_hop_nic1_name> (2)

   1	Add the NMState YAML syntax to configure the host interfaces.
   2	Replace <nic1_name>, <ip_address>, <dns_ip_address>, <next_hop_ip_address> and <next_hop_nic1_name> with appropriate values.

   After deploying the cluster, you cannot modify the networkConfig configuration setting of install-config.yaml file to make changes to the host network interface. Use the Kubernetes NMState Operator to make changes to the host network interface after deployment.

Configuring host network interfaces for subnets

For edge computing scenarios, it can be beneficial to locate worker nodes closer to the edge. To locate remote worker nodes in subnets, you might use different network segments or subnets for the remote worker nodes than you used for the control plane subnet and local worker nodes. You can reduce latency for the edge and allow for enhanced scalability by setting up subnets for edge computing scenarios.

If you have established different network segments or subnets for remote worker nodes as described in the section on “Establishing communication between subnets”, you must specify the subnets in the machineNetwork configuration setting if the workers are using static IP addresses, bonds or other advanced networking. When setting the node IP address in the networkConfig parameter for each remote worker node, you must also specify the gateway and the DNS server for the subnet containing the control plane nodes when using static IP addresses. This ensures the remote worker nodes can reach the subnet containing the control plane nodes and that they can receive network traffic from the control plane.

Procedure

1. Add the subnets to the machineNetwork in the install-config.yaml file when using static IP addresses:

   networking:
     machineNetwork:
     - cidr: 10.0.0.0/24
     - cidr: 192.168.0.0/24
     networkType: OVNKubernetes

2. Add the gateway and DNS configuration to the networkConfig parameter of each edge worker node using NMState syntax when using a static IP address or advanced networking such as bonds:

   networkConfig:
     nmstate:
       interfaces:
       - name: <interface_name> (1)
         type: ethernet
         state: up
         ipv4:
           enabled: true
           dhcp: false
           address:
           - ip: <node_ip> (2)
             prefix-length: 24
           gateway: <gateway_ip> (3)
           dns-resolver:
             config:
               server:
               - <dns_ip> (4)

   1	Replace <interface_name> with the interface name.
   2	Replace <node_ip> with the IP address of the node.
   3	Replace <gateway_ip> with the IP address of the gateway.
   4	Replace <dns_ip> with the IP address of the DNS server.

Optional: Configuring address generation modes for SLAAC in dual-stack networks

For dual-stack clusters that use Stateless Address AutoConfiguration (SLAAC), you must specify a global value for the ipv6.addr-gen-mode network setting. You can set this value using NMState to configure the ramdisk and the cluster configuration files. If you don’t configure a consistent ipv6.addr-gen-mode in these locations, IPv6 address mismatches can occur between CSR resources and BareMetalHost resources in the cluster.

Prerequisites

• Install the NMState CLI (nmstate).

Procedure

1. Optional: Consider testing the NMState YAML syntax with the nmstatectl gc command before including it in the install-config.yaml file because the installation program will not check the NMState YAML syntax.

   1. Create an NMState YAML file:

      interfaces:
      - name: eth0
        ipv6:
          addr-gen-mode: <address_mode> (1)

      1	Replace <address_mode> with the type of address generation mode required for IPv6 addresses in the cluster. Valid values are eui64, stable-privacy, or random.

   2. Test the configuration file by running the following command:

      $ nmstatectl gc <nmstate_yaml_file> (1)

      1	Replace <nmstate_yaml_file> with the name of the test configuration file.

2. Add the NMState configuration to the hosts.networkConfig section within the install-config.yaml file:

       hosts:
         - name: openshift-master-0
           role: master
           bmc:
             address: redfish+http://<out_of_band_ip>/redfish/v1/Systems/
             username: <user>
             password: <password>
             disableCertificateVerification: null
           bootMACAddress: <NIC1_mac_address>
           bootMode: UEFI
           rootDeviceHints:
             deviceName: "/dev/sda"
           networkConfig:
             interfaces:
             - name: eth0
               ipv6:
                 addr-gen-mode: <address_mode> (1)
   ...

   1	Replace <address_mode> with the type of address generation mode required for IPv6 addresses in the cluster. Valid values are eui64, stable-privacy, or random.

Optional: Configuring host network interfaces for dual port NIC

Before installation, you can set the networkConfig configuration setting in the install-config.yaml file to configure host network interfaces using NMState to support dual port NIC.

Prequisites

• Configure a PTR DNS record with a valid hostname for each node with a static IP address.

• Install the NMState CLI (nmstate).

Procedure

1. Add the NMState configuration to the networkConfig field to hosts within the install-config.yaml file:

   hosts:
     - hostname: worker-1
       interfaces:
         - name: eno1
           macAddress: 0c:42:a1:55:f3:06
         - name: eno2
           macAddress: 0c:42:a1:55:f3:07
       networkConfig: (1)
         interfaces: (2)
           - name: eno1 (3)
             type: ethernet (4)
             state: up
             mac-address: 0c:42:a1:55:f3:06
             ipv4:
               enabled: true
               dhcp: false (5)
             ethernet:
               sr-iov:
                 total-vfs: 2 (6)
             ipv6:
               enabled: false
               dhcp: false
           - name: sriov:eno1:0
             type: ethernet
             state: up (7)
             ipv4:
               enabled: false (8)
             ipv6:
               enabled: false
           - name: sriov:eno1:1
             type: ethernet
             state: down
           - name: eno2
             type: ethernet
             state: up
             mac-address: 0c:42:a1:55:f3:07
             ipv4:
               enabled: true
             ethernet:
               sr-iov:
                 total-vfs: 2
             ipv6:
               enabled: false
           - name: sriov:eno2:0
             type: ethernet
             state: up
             ipv4:
               enabled: false
             ipv6:
               enabled: false
           - name: sriov:eno2:1
             type: ethernet
             state: down
           - name: bond0
             type: bond
             state: up
             min-tx-rate: 100 (9)
             max-tx-rate: 200 (10)
             link-aggregation:
               mode: active-backup (11)
               options:
                 primary: sriov:eno1:0 (12)
               port:
                 - sriov:eno1:0
                 - sriov:eno2:0
             ipv4:
               address:
                 - ip: 10.19.16.57 (13)
                   prefix-length: 23
               dhcp: false
               enabled: true
             ipv6:
               enabled: false
             dns-resolver:
               config:
                 server:
                   - 10.11.5.160
                   - 10.2.70.215
             routes:
               config:
                 - destination: 0.0.0.0/0
                   next-hop-address: 10.19.17.254
                   next-hop-interface: bond0 (14)
                   table-id: 254

   1	The networkConfig field contains information about the network configuration of the host, with subfields including interfaces, dns-resolver, and routes.
   2	The interfaces field is an array of network interfaces defined for the host.
   3	The name of the interface.
   4	The type of interface. This example creates a ethernet interface.
   5	Set this to `false to disable DHCP for the physical function (PF) if it is not strictly required.
   6	Set to the number of SR-IOV virtual functions (VFs) to instantiate.
   7	Set this to up.
   8	Set this to false to disable IPv4 addressing for the VF attached to the bond.
   9	Sets a minimum transmission rate, in Mbps, for the VF. This sample value sets a rate of 100 Mbps. This value must be less than or equal to the maximum transmission rate. Intel NICs do not support the min-tx-rate parameter. For more information, see BZ#1772847.
   10	Sets a maximum transmission rate, in Mbps, for the VF. This sample value sets a rate of 200 Mbps.
   11	Sets the desired bond mode.
   12	Sets the preferred port of the bonding interface. The primary device is the first of the bonding interfaces to be used and is not abandoned unless it fails. This setting is particularly useful when one NIC in the bonding interface is faster and, therefore, able to handle a bigger load. This setting is only valid when the bonding interface is in active-backup mode (mode 1) and balance-tlb (mode 5).
   13	Sets a static IP address for the bond interface. This is the node IP address.
   14	Sets bond0 as the gateway for the default route. After deploying the cluster, you cannot modify the networkConfig configuration setting of install-config.yaml file to make changes to the host network interface. Use the Kubernetes NMState Operator to make changes to the host network interface after deployment.

Additional resources

• Configuring network bonding

Configuring multiple cluster nodes

You can simultaneously configure OKD cluster nodes with identical settings. Configuring multiple cluster nodes avoids adding redundant information for each node to the install-config.yaml file. This file contains specific parameters to apply an identical configuration to multiple nodes in the cluster.

Compute nodes are configured separately from the controller node. However, configurations for both node types use the highlighted parameters in the install-config.yaml file to enable multi-node configuration. Set the networkConfig parameters to BOND, as shown in the following example:

hosts:
- name: ostest-master-0
 [...]
 networkConfig: &BOND
   interfaces:
   - name: bond0
     type: bond
     state: up
     ipv4:
       dhcp: true
       enabled: true
     link-aggregation:
       mode: active-backup
       port:
       - enp2s0
       - enp3s0
- name: ostest-master-1
 [...]
 networkConfig: *BOND
- name: ostest-master-2
 [...]
 networkConfig: *BOND

Optional: Configuring managed Secure Boot

You can enable managed Secure Boot when deploying an installer-provisioned cluster using Redfish BMC addressing, such as redfish, redfish-virtualmedia, or idrac-virtualmedia. To enable managed Secure Boot, add the bootMode configuration setting to each node:

Example

hosts:
  - name: openshift-master-0
    role: master
    bmc:
      address: redfish://<out_of_band_ip> (1)
      username: <username>
      password: <password>
    bootMACAddress: <NIC1_mac_address>
    rootDeviceHints:
     deviceName: "/dev/sda"
    bootMode: UEFISecureBoot (2)

Manifest configuration files

Creating the OKD manifests

1. Create the OKD manifests.

   $ ./openshift-baremetal-install --dir ~/clusterconfigs create manifests

   INFO Consuming Install Config from target directory
   WARNING Making control-plane schedulable by setting MastersSchedulable to true for Scheduler cluster settings
   WARNING Discarding the OpenShift Manifest that was provided in the target directory because its dependencies are dirty and it needs to be regenerated

Optional: Configuring NTP for disconnected clusters

OKD installs the chrony Network Time Protocol (NTP) service on the cluster nodes.

OKD nodes must agree on a date and time to run properly. When worker nodes retrieve the date and time from the NTP servers on the control plane nodes, it enables the installation and operation of clusters that are not connected to a routable network and thereby do not have access to a higher stratum NTP server.

Procedure

1. Create a Butane config, 99-master-chrony-conf-override.bu, including the contents of the chrony.conf file for the control plane nodes.

   See “Creating machine configs with Butane” for information about Butane.

   Butane config example

   variant: openshift
   version: 4.0
   metadata:
     name: 99-master-chrony-conf-override
     labels:
       machineconfiguration.openshift.io/role: master
   storage:
     files:
       - path: /etc/chrony.conf
         mode: 0644
         overwrite: true
         contents:
           inline: |
             # Use public servers from the pool.ntp.org project.
             # Please consider joining the pool (https://www.pool.ntp.org/join.html).
             # The Machine Config Operator manages this file
             server openshift-master-0.<cluster-name>.<domain> iburst (1)
             server openshift-master-1.<cluster-name>.<domain> iburst
             server openshift-master-2.<cluster-name>.<domain> iburst
             stratumweight 0
             driftfile /var/lib/chrony/drift
             rtcsync
             makestep 10 3
             bindcmdaddress 127.0.0.1
             bindcmdaddress ::1
             keyfile /etc/chrony.keys
             commandkey 1
             generatecommandkey
             noclientlog
             logchange 0.5
             logdir /var/log/chrony
             # Configure the control plane nodes to serve as local NTP servers
             # for all worker nodes, even if they are not in sync with an
             # upstream NTP server.
             # Allow NTP client access from the local network.
             allow all
             # Serve time even if not synchronized to a time source.
             local stratum 3 orphan

   1	You must replace <cluster-name> with the name of the cluster and replace <domain> with the fully qualified domain name.

2. Use Butane to generate a MachineConfig object file, 99-master-chrony-conf-override.yaml, containing the configuration to be delivered to the control plane nodes:

   $ butane 99-master-chrony-conf-override.bu -o 99-master-chrony-conf-override.yaml

3. Create a Butane config, 99-worker-chrony-conf-override.bu, including the contents of the chrony.conf file for the worker nodes that references the NTP servers on the control plane nodes.

   Butane config example

   variant: openshift
   version: 4.0
   metadata:
     name: 99-worker-chrony-conf-override
     labels:
       machineconfiguration.openshift.io/role: worker
   storage:
     files:
       - path: /etc/chrony.conf
         mode: 0644
         overwrite: true
         contents:
           inline: |
             # The Machine Config Operator manages this file.
             server openshift-master-0.<cluster-name>.<domain> iburst (1)
             server openshift-master-1.<cluster-name>.<domain> iburst
             server openshift-master-2.<cluster-name>.<domain> iburst
             stratumweight 0
             driftfile /var/lib/chrony/drift
             rtcsync
             makestep 10 3
             bindcmdaddress 127.0.0.1
             bindcmdaddress ::1
             keyfile /etc/chrony.keys
             commandkey 1
             generatecommandkey
             noclientlog
             logchange 0.5
             logdir /var/log/chrony

   1	You must replace <cluster-name> with the name of the cluster and replace <domain> with the fully qualified domain name.

4. Use Butane to generate a MachineConfig object file, 99-worker-chrony-conf-override.yaml, containing the configuration to be delivered to the worker nodes:

   $ butane 99-worker-chrony-conf-override.bu -o 99-worker-chrony-conf-override.yaml

Configuring network components to run on the control plane

You can configure networking components to run exclusively on the control plane nodes. By default, OKD allows any node in the machine config pool to host the ingressVIP virtual IP address. However, some environments deploy worker nodes in separate subnets from the control plane nodes, which requires configuring the ingressVIP virtual IP address to run on the control plane nodes.

Procedure

1. Change to the directory storing the install-config.yaml file:

   $ cd ~/clusterconfigs

2. Switch to the manifests subdirectory:

   $ cd manifests

3. Create a file named cluster-network-avoid-workers-99-config.yaml:

   $ touch cluster-network-avoid-workers-99-config.yaml

4. Open the cluster-network-avoid-workers-99-config.yaml file in an editor and enter a custom resource (CR) that describes the Operator configuration:

   apiVersion: machineconfiguration.openshift.io/v1
   kind: MachineConfig
   metadata:
     name: 50-worker-fix-ipi-rwn
     labels:
       machineconfiguration.openshift.io/role: worker
   spec:
     config:
       ignition:
         version: 3.2.0
       storage:
         files:
           - path: /etc/kubernetes/manifests/keepalived.yaml
             mode: 0644
             contents:
               source: data:,

   This manifest places the ingressVIP virtual IP address on the control plane nodes. Additionally, this manifest deploys the following processes on the control plane nodes only:

   • openshift-ingress-operator

   • keepalived

5. Save the cluster-network-avoid-workers-99-config.yaml file.

6. Create a manifests/cluster-ingress-default-ingresscontroller.yaml file:

   apiVersion: operator.openshift.io/v1
   kind: IngressController
   metadata:
     name: default
     namespace: openshift-ingress-operator
   spec:
     nodePlacement:
       nodeSelector:
         matchLabels:
           node-role.kubernetes.io/master: ""

7. Consider backing up the manifests directory. The installer deletes the manifests/ directory when creating the cluster.

8. Modify the cluster-scheduler-02-config.yml manifest to make the control plane nodes schedulable by setting the mastersSchedulable field to true. Control plane nodes are not schedulable by default. For example:

   $ sed -i "s;mastersSchedulable: false;mastersSchedulable: true;g" clusterconfigs/manifests/cluster-scheduler-02-config.yml

   If control plane nodes are not schedulable after completing this procedure, deploying the cluster will fail.

Optional: Deploying routers on worker nodes

During installation, the installer deploys router pods on worker nodes. By default, the installer installs two router pods. If a deployed cluster requires additional routers to handle external traffic loads destined for services within the OKD cluster, you can create a yaml file to set an appropriate number of router replicas.

Procedure

1. Create a router-replicas.yaml file:

   apiVersion: operator.openshift.io/v1
   kind: IngressController
   metadata:
     name: default
     namespace: openshift-ingress-operator
   spec:
     replicas: <num-of-router-pods>
     endpointPublishingStrategy:
       type: HostNetwork
     nodePlacement:
       nodeSelector:
         matchLabels:
           node-role.kubernetes.io/worker: ""

   Replace <num-of-router-pods> with an appropriate value. If working with just one worker node, set replicas: to 1. If working with more than 3 worker nodes, you can increase replicas: from the default value 2 as appropriate.

2. Save and copy the router-replicas.yaml file to the clusterconfigs/openshift directory:

   $ cp ~/router-replicas.yaml clusterconfigs/openshift/99_router-replicas.yaml

Optional: Configuring the BIOS

The following procedure configures the BIOS during the installation process.

Procedure

1. Create the manifests.

2. Modify the BareMetalHost resource file corresponding to the node:

   $ vim clusterconfigs/openshift/99_openshift-cluster-api_hosts-*.yaml

3. Add the BIOS configuration to the spec section of the BareMetalHost resource:

   spec:
     firmware:
       simultaneousMultithreadingEnabled: true
       sriovEnabled: true
       virtualizationEnabled: true

   Red Hat supports three BIOS configurations. Only servers with BMC type irmc are supported. Other types of servers are currently not supported.

4. Create the cluster.

Additional resources

• Bare metal configuration

Optional: Configuring the RAID

The following procedure configures a redundant array of independent disks (RAID) during the installation process.

Procedure

1. Create the manifests.

2. Modify the BareMetalHost resource corresponding to the node:

   $ vim clusterconfigs/openshift/99_openshift-cluster-api_hosts-*.yaml

   The following example uses a hardware RAID configuration because OKD 4 does not support software RAID.

   1. If you added a specific RAID configuration to the spec section, this causes the node to delete the original RAID configuration in the preparing phase and perform a specified configuration on the RAID. For example:

      spec:
        raid:
          hardwareRAIDVolumes:
          - level: "0" (1)
            name: "sda"
            numberOfPhysicalDisks: 1
            rotational: true
            sizeGibibytes: 0

      1	level is a required field, and the others are optional fields.

   2. If you added an empty RAID configuration to the spec section, the empty configuration causes the node to delete the original RAID configuration during the preparing phase, but does not perform a new configuration. For example:

      spec:
        raid:
          hardwareRAIDVolumes: []

   3. If you do not add a raid field in the spec section, the original RAID configuration is not deleted, and no new configuration will be performed.

3. Create the cluster.

Optional: Configuring storage on nodes

You can make changes to operating systems on OKD nodes by creating MachineConfig objects that are managed by the Machine Config Operator (MCO).

The MachineConfig specification includes an ignition config for configuring the machines at first boot. This config object can be used to modify files, systemd services, and other operating system features running on OKD machines.

Procedure

Use the ignition config to configure storage on nodes. The following MachineSet manifest example demonstrates how to add a partition to a device on a primary node. In this example, apply the manifest before installation to have a partition named recovery with a size of 16 GiB on the primary node.

1. Create a custom-partitions.yaml file and include a MachineConfig object that contains your partition layout:

   apiVersion: machineconfiguration.openshift.io/v1
   kind: MachineConfig
   metadata:
     labels:
       machineconfiguration.openshift.io/role: primary
     name: 10_primary_storage_config
   spec:
     config:
       ignition:
         version: 3.2.0
       storage:
         disks:
           - device: </dev/xxyN>
             partitions:
               - label: recovery
                 startMiB: 32768
                 sizeMiB: 16384
         filesystems:
           - device: /dev/disk/by-partlabel/recovery
             label: recovery
             format: xfs

2. Save and copy the custom-partitions.yaml file to the clusterconfigs/openshift directory:

   $ cp ~/<MachineConfig_manifest> ~/clusterconfigs/openshift

Additional resources

• Bare metal configuration

• Partition naming scheme

Creating a disconnected registry

In some cases, you might want to install an OKD cluster using a local copy of the installation registry. This could be for enhancing network efficiency because the cluster nodes are on a network that does not have access to the internet.

A local, or mirrored, copy of the registry requires the following:

• A certificate for the registry node. This can be a self-signed certificate.

• A web server that a container on a system will serve.

• An updated pull secret that contains the certificate and local repository information.

Prerequisites

• If you have already prepared a mirror registry for Mirroring images for a disconnected installation, you can skip directly to Modify the install-config.yaml file to use the disconnected registry.

Preparing the registry node to host the mirrored registry

The following steps must be completed prior to hosting a mirrored registry on bare metal.

Procedure

1. Open the firewall port on the registry node:

   $ sudo firewall-cmd --add-port=5000/tcp --zone=libvirt  --permanent

   $ sudo firewall-cmd --add-port=5000/tcp --zone=public   --permanent

   $ sudo firewall-cmd --reload

2. Install the required packages for the registry node:

   $ sudo yum -y install python3 podman httpd httpd-tools jq

3. Create the directory structure where the repository information will be held:

   $ sudo mkdir -p /opt/registry/{auth,certs,data}

Mirroring the OKD image repository for a disconnected registry

Complete the following steps to mirror the OKD image repository for a disconnected registry.

Prerequisites

• Your mirror host has access to the internet.

• You configured a mirror registry to use in your restricted network and can access the certificate and credentials that you configured.

• You have created a pull secret for your mirror repository.

Procedure

1. Review the OKD downloads page to determine the version of OKD that you want to install and determine the corresponding tag on the Repository Tags page.

2. Set the required environment variables:

   1. Export the release version:

      $ OCP_RELEASE=<release_version>

      For <release_version>, specify the tag that corresponds to the version of OKD to install, such as 4.5.4.

   2. Export the local registry name and host port:

      $ LOCAL_REGISTRY='<local_registry_host_name>:<local_registry_host_port>'

      For <local_registry_host_name>, specify the registry domain name for your mirror repository, and for <local_registry_host_port>, specify the port that it serves content on.

   3. Export the local repository name:

      $ LOCAL_REPOSITORY='<local_repository_name>'

      For <local_repository_name>, specify the name of the repository to create in your registry, such as ocp4/openshift4.

   4. Export the name of the repository to mirror:

      $ PRODUCT_REPO='openshift'

   5. Export the path to your registry pull secret:

      $ LOCAL_SECRET_JSON='<path_to_pull_secret>'

      For <path_to_pull_secret>, specify the absolute path to and file name of the pull secret for your mirror registry that you created.

   6. Export the release mirror:

      $ RELEASE_NAME="okd"

   7. Export the path to the directory to host the mirrored images:

      $ REMOVABLE_MEDIA_PATH=<path> (1)

      1	Specify the full path, including the initial forward slash (/) character.

3. Mirror the version images to the mirror registry:

   • If your mirror host does not have internet access, take the following actions:

     1. Connect the removable media to a system that is connected to the internet.

     2. Review the images and configuration manifests to mirror:

        $ oc adm release mirror -a ${LOCAL_SECRET_JSON}  \
             --from=quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE} \
             --to=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} \
             --to-release-image=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE} --dry-run

     3. Record the entire imageContentSources section from the output of the previous command. The information about your mirrors is unique to your mirrored repository, and you must add the imageContentSources section to the install-config.yaml file during installation.

     4. Mirror the images to a directory on the removable media:

        $ oc adm release mirror -a ${LOCAL_SECRET_JSON} --to-dir=${REMOVABLE_MEDIA_PATH}/mirror quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE}

     5. Take the media to the restricted network environment and upload the images to the local container registry.

        $ oc image mirror -a ${LOCAL_SECRET_JSON} --from-dir=${REMOVABLE_MEDIA_PATH}/mirror "file://openshift/release:${OCP_RELEASE}*" ${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} (1)

        1	For REMOVABLE_MEDIA_PATH, you must use the same path that you specified when you mirrored the images.

   • If the local container registry is connected to the mirror host, take the following actions:

     1. Directly push the release images to the local registry by using following command:

        $ oc adm release mirror -a ${LOCAL_SECRET_JSON}  \
             --from=quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE} \
             --to=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} \
             --to-release-image=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}

        This command pulls the release information as a digest, and its output includes the imageContentSources data that you require when you install your cluster.

     2. Record the entire imageContentSources section from the output of the previous command. The information about your mirrors is unique to your mirrored repository, and you must add the imageContentSources section to the install-config.yaml file during installation.

        The image name gets patched to Quay.io during the mirroring process, and the podman images will show Quay.io in the registry on the bootstrap virtual machine.