deploy_baremetal_workers.md

Deploying OpenShift bare-metal workers on OpenStack cloud provider

Table of Contents

• Deploying OpenShift bare-metal workers on OpenStack cloud provider
  • Table of Contents
  • Common prerequisites
  • Considerations when deploying bare-metal workers
  • Deploying cluster with BM workers on tenant network deployed by the installer
  • Deploying cluster with BM workers on preexisting network
  • Deploying cluster with BM machines only on preexisting network
  • Deploying cluster with mixture of VM and BM workers
  • Known issues

Common prerequisites

• Ironic bare metal service is enabled and accessible through the OpenStack Compute API.
• Bare-metal machines are available as an OpenStack flavor.
• At the time bare-metal machines are booted, the image used to boot them is available from the Glance OpenStack image service. If given a URL, the installer will fetch that image from the location specified and upload it to Glance. See relevant documentation.

Considerations when deploying bare-metal workers

• Long boot times for bare-metal machines may result in deployment timeout

  The first time a bare-metal server is booted the boot time could be significantly longer that the first time a VM server is booted. This longer boot time could exceed the timeout settings of the installer. If that occurs, the deployment will fail with a timeout error. The deployment maybe restarted and completed by re-running the installer with the appropriate wait-for command. For example:

    ./openshift-install wait-for install-complete --log-level debug
  

Deploying cluster with BM workers on tenant network deployed by the installer

The initial cluster is deployed using bare-metal workers only. Bare-metal workers and control plane VMs are all attached to the tenant network provisioned by the installer.

• Requirements:

  • By default, OpenStack networks support attaching both VMs and bare-metal machines to them.
  • Ironic bare metal service can listen for, and PXE-boot machines in tenant networks

• Create install-config.yaml:

  • Set compute.[worker].platform.openstack.type to the bare-metal server flavor.

  • Set controlPlane.platform.openstack.type to the VM flavor which will be used by the control plane nodes.

    For example:

          controlPlane:
             platform:
               openstack:
                 type: <vmComputeFlavorForMasters>
    
           ... other settings
    
           compute:
           - architecture: amd64
             hyperthreading: Enabled
             name: worker
             platform:
               openstack:
                 type: <baremetalComputeFlavor>
             replicas: 3
    
           ... other settings
    

• Run the openshift installer:

  ./openshift-install create cluster --log-level debug
  

• wait for the installer to complete.

  If the installer times out waiting for the bare-metal workers to complete booting, restart the installation using the appropriate wait-for command.

Deploying cluster with BM workers on preexisting network

Initial cluster is deployed using bare-metal workers only. Bare-metal workers are attached to a preexisting network.

• Requirements:

  • An OpenStack subnet has been pre-provisioned which supports attaching both VMs and bare-metal servers to it.

• Create install-config.yaml:

  • Set compute.[worker].platform.openstack.type to the bare-metal server flavor.

  • Set controlPlane.platform.openstack.type to the VM flavor which will be used by the control plane nodes.

  • Set platform.openstack.machinesSubnet to the UUID of the pre-provisioned subnet.

    For example:

          controlPlane:
             platform:
               openstack:
                 type: <vmComputeFlavorForMasters>
    
           ... other settings
    
           compute:
           - architecture: amd64
             hyperthreading: Enabled
             name: worker
             platform:
               openstack:
                 type: <baremetalComputeFlavor>
             replicas: 3
    
           ... other settings
    
           platform:
             openstack:
               machinesSubnet: <uuidOfPreprovisionedSubnet>
    

• Run the openshift installer:

    ./openshift-install create cluster --log-level debug
  

• wait for the installer to complete.

  If the installer times out waiting for the bare-metal workers to complete booting, restart the installation using the appropriate wait-for command.

Deploying cluster with BM machines only on preexisting network

Initial cluster is deployed using bare-metal machines only for both Control Plane and Compute nodes. The cluster is deployed to a preexisting network.

• Requirements:

  • An OpenStack subnet has been pre-provisioned which supports attaching bare-metal servers to it.

• Create install-config.yaml:

  • Set compute.[worker].platform.openstack.type to a bare-metal server flavor.

  • Set controlPlane.platform.openstack.type to a bare-metal server flavor.

  • Set platform.openstack.machinesSubnet to the UUID of the pre-provisioned subnet.

    For example:

          controlPlane:
             platform:
               openstack:
                 type: <bmComputeFlavorForMasters>
    
           ... other settings
    
           compute:
           - architecture: amd64
             hyperthreading: Enabled
             name: worker
             platform:
               openstack:
                 type: <bmComputeFlavorForWorkers>
             replicas: 3
    
           ... other settings
    
           platform:
             openstack:
               machinesSubnet: <uuidOfPreprovisionedSubnet>
    

• Run the openshift installer:

    ./openshift-install create cluster --log-level debug
  

• wait for the installer to complete.

  If the installer times out waiting for the bare-metal workers to complete booting, restart the installation using the appropriate wait-for command.

Deploying cluster with mixture of VM and BM workers

Cluster is initially deployed with VM workers. BM workers are added to the cluster post initial deployment.

• Requirements:

  • By default, OpenStack networks support attaching both VMs and bare-metal machines to them.
  • Ironic bare metal service can listen for, and PXE-boot machines in tenant networks

• Create install-config.yaml:

  • Set compute.[worker].platform.openstack.type to the VM flavor which will be used for VM workers.

  • Set controlPlane.platform.openstack.type to the VM flavor which will be used by the control plane nodes.

    For example:

          controlPlane:
             platform:
               openstack:
                 type: <vmComputeFlavorForMasters>
    
           ... other settings
    
           compute:
           - architecture: amd64
             hyperthreading: Enabled
             name: worker
             platform:
               openstack:
                 type: <vmComputeFlavorForWorkers>
             replicas: 3
    

• Run the openshift installer:

    ./openshift-install create cluster --log-level debug
  

• Once the cluster is deployed and running, create and deploy a new infrastructure MachineSet using the bare-metal server flavor.

Known issues

Bare metal nodes are not supported on clusters that use Kuryr.