Chapter 3. Updating the Overcloud

This process updates the overcloud.

Prerequisites

  • You have updated the undercloud to the latest version.

3.1. Running the overcloud update preparation

The update requires running openstack overcloud update prepare command, which performs the following tasks:

  • Updates the overcloud plan to OpenStack Platform 15
  • Prepares the nodes for the update

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the update preparation command: 

    $ openstack overcloud update prepare \
    --templates \
    -r <ROLES DATA FILE> \
    -n <NETWORK DATA FILE> \
    -e <ENVIRONMENT FILE> \
    -e <ENVIRONMENT FILE> \
    ...

    Include the following options relevant to your environment:

    • Custom configuration environment files (-e)
    • If using your own custom roles, include your custom roles (roles_data) file (-r)
    • If using custom networks, include your composable network (network_data) file (-n)
  3. Wait until the update preparation completes.

3.2. Running the container image preparation

The overcloud requires the latest OpenStack Platform 15 container images before performing the update. This involves executing the container_image_prepare external update process. To execute this process, run the openstack overcloud external-update run command against tasks tagged with the container_image_prepare tag. These tasks:

  • Automatically prepare all container image configuration relevant to your environment.
  • Pull the relevant container images to your undercloud, unless you have previously disabled this option.

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the openstack overcloud external-update run command against tasks tagged with the container_image_prepare tag: 

    $ openstack overcloud external-update run --tags container_image_prepare

3.3. Updating all Controller nodes

This process updates all the Controller nodes to the latest OpenStack Platform 15 version. The process involves running the openstack overcloud update run command and including the --nodes Controller option to restrict operations to the Controller nodes only.

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the update command: 

    $ openstack overcloud update run --nodes Controller
  3. Wait until the Controller node update completes.

3.4. Updating all Compute nodes

This process updates all Compute nodes to the latest OpenStack Platform 15 version. The process involves running the openstack overcloud update run command and including the --nodes Compute option to restrict operations to the Compute nodes only.

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the update command: 

    $ openstack overcloud update run --nodes Compute
  3. Wait until the Compute node update completes.

3.5. Updating all HCI Compute nodes

This process updates the Hyperconverged Infrastructure (HCI) Compute nodes. The process involves:

  • Running the openstack overcloud update run command and including the --nodes ComputeHCI option to restrict operations to the HCI nodes only.
  • Running the openstack overcloud ceph-upgrade run command to perform an update to a containerized Red Hat Ceph Storage 3 cluster.
Note

Currently, the following combinations of Ansible with ceph-ansible are supported:

  • ansible-2.6 with ceph-ansible-3.2
  • ansible-2.4 with ceph-ansible-3.1

If your environment has ansible-2.6 with ceph-ansible-3.1, run the following commands to update ceph-ansible to the newest version: 

  # subscription-manager repos --enable=rhel-7-server-rhceph-3-tools-rpms
  # subscription-manager repos --enable=rhel-7-server-ansible-2.6-rpms
  # yum update ceph-ansible

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the update command: 

    $ openstack overcloud update run --nodes ComputeHCI
  3. Wait until the node update completes.

  4. Run the Ceph Storage update command. For example: 

    $ openstack overcloud ceph-upgrade run \
    --templates \
    -e <ENVIRONMENT FILE> \
    -e /home/stack/templates/overcloud_images.yaml

    Include the following options relevant to your environment:

    • Custom configuration environment files (-e)
    • The environment file with your container image locations (-e). Note that the update command might display a warning about using the --container-registry-file. You can ignore this warning as this option is deprecated in favor of using -e for the container image environment file.
    • If applicable, your custom roles (roles_data) file (--roles-file)
    • If applicable, your composable network (network_data) file (--networks-file)
  5. Wait until the Compute HCI node update completes.

3.6. Updating all Ceph Storage nodes

This process updates the Ceph Storage nodes. The process involves:

  • Running the openstack overcloud update run command and including the --nodes CephStorage option to restrict operations to the Ceph Storage nodes only.
  • Running the openstack overcloud external-update run command to run ceph-ansible as an external process and update the Red Hat Ceph Storage 3 containers.

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the update command: 

    $ openstack overcloud update run --nodes CephStorage
  3. Wait until the node update completes.

  4. Run the Ceph Storage container update command: 

    $ openstack overcloud external-update run --tags ceph
  5. Wait until the Ceph Storage container update completes.

3.7. Performing online database updates

Some overcloud components require an online upgrade (or migration) of their databases tables. This involves executing the online_upgrade external update process. To execute this process, run the openstack overcloud external-update run command against tasks tagged with the online_upgrade tag. This performs online database updates to the following components:

  • OpenStack Block Storage (cinder)
  • OpenStack Compute (nova)

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the openstack overcloud external-update run command against tasks tagged with the online_upgrade tag: 

    $ openstack overcloud external-update run --tags online_upgrade

3.8. Finalizing the update

The update requires a final step to update the overcloud stack. This ensures the stack’s resource structure aligns with a regular deployment of OpenStack Platform 15 and allows you to perform standard openstack overcloud deploy functions in the future.

Procedure

  1. Source the stackrc file: 

    $ source ~/stackrc

  2. Run the update finalization command: 

    $ openstack overcloud update converge \
    --templates \
    -e <ENVIRONMENT FILE> \
    -e <ENVIRONMENT FILE> \
    ...

    Include the following options relevant to your environment:

    • Custom configuration environment files (-e).
    • If applicable, your custom roles (roles_data) file (--roles-file)
    • If applicable, your composable network (network_data) file (--networks-file)
  3. Wait until the update finalization completes.