Chapter 3. Upgrading the Undercloud

Procedure

1. Log in to director as the stack user.

2. Disable the current OpenStack Platform repository:

   $ sudo subscription-manager repos --disable=rhel-7-server-openstack-12-rpms

3. Set the RHEL version to RHEL 7.9:

   $ sudo subscription-manager release --set=7.9

4. Enable the new OpenStack Platform repository:

   $ sudo subscription-manager repos --enable=rhel-7-server-openstack-13-rpms

5. Re-enable updates to the overcloud base images:

   $ sudo yum-config-manager --setopt=exclude= --save

6. Run yum to upgrade the director’s main packages:

   $ sudo yum update -y python-tripleoclient

7. Run the following command to upgrade the undercloud:

   $ openstack undercloud upgrade

8. Wait until the undercloud upgrade process completes.

9. Reboot the undercloud to update the operating system’s kernel and other system packages:

   $ sudo reboot

10. Wait until the node boots.

Procedure

1. Source the undercloud access details:

   $ source ~/stackrc

2. Remove any existing images from the images directory on the stack user’s home (/home/stack/images):

   $ rm -rf ~/images/*

3. Extract the archives:

   $ cd ~/images
   $ for i in /usr/share/rhosp-director-images/overcloud-full-latest-13.0.tar /usr/share/rhosp-director-images/ironic-python-agent-latest-13.0.tar; do tar -xvf $i; done
   $ cd ~

4. Import the latest images into the director:

   $ openstack overcloud image upload --update-existing --image-path /home/stack/images/

5. Configure your nodes to use the new images:

   $ openstack overcloud node configure $(openstack baremetal node list -c UUID -f value)

6. Verify the existence of the new images:

   $ openstack image list
   $ ls -l /httpboot

Procedure

1. Install the openstack-tripleo-heat-templates-compat package:

   $ sudo yum install openstack-tripleo-heat-templates-compat

   This installs the previous templates in the compat directory of your Heat template collection (/usr/share/openstack-tripleo-heat-templates/compat) and also creates a link to compat named after the previous version (pike). These templates are backwards compatible with the upgraded director, which means you can use the latest version of the director to install an overcloud of the previous version.

2. Create a temporary copy of the core Heat templates:

   $ cp -a /usr/share/openstack-tripleo-heat-templates /tmp/osp13

3. Move the previous version into its own directory:

   $ mv /tmp/osp13/compat /tmp/osp12

4. Perform a diff on the contents of both directories:

   $ diff -urN /tmp/osp12 /tmp/osp13

   This shows the core template changes from one version to the next. These changes provide an idea of what should occur during the overcloud upgrade.