This is adapted from: https://cluster-api.sigs.k8s.io/tasks/upgrading-clusters.html

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To upgrade major versions you will need to follow the https://stfc.atlassian.net/wiki/spaces/CLOUDKB/pages/285704256/Cluster+API+Upgrade#Upgrade-Clusterctl-and-CAPI-components section first then https://stfc.atlassian.net/wiki/spaces/CLOUDKB/pages/285704256/Cluster+API+Upgrade#UpgradingUpgrade#Kubernetes-KubernetesImage-Majorand-Version-Upgrades for each hop.

Overview

This process assumes the administrator is doing a full upgrade of all components. These can be upgraded independently with the caveat that the Infrastructure layer supports the version of Kubernetes planned: https://cluster-api.sigs.k8s.io/reference/versions

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• Validate that the upgrade is valid and apply the command provided by clusterctl

Kubernetes Image and Version Upgrades

Without minor version upgrade

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You’ll need to upgrade VM images and Kubernetes version to the latest patch version available

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before doing any major upgrades:

I.e. if you’re on 1.100.12 upgrade to the latest 1.100.x, this ensures any bug-fixes are applied which could prevent later upgrades.

For major and minor

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upgrades

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:

• Lookup the latest image build for Kubernetes, this can be found in images section of the web interface

• Edit the kubernetesVersion in user-values.yaml

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• to

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• match the image name

• Edit the machineImage in user-values.yaml

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• to

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• use the latest patch release

helm upgrade <cluster_name> capi/openstack-cluster -f values.yaml -f clouds.yaml -f user-values.yaml -f flavors.yaml -n clusters

• Wait for the rollout of new infra to complete

  • The rollout can be monitored with kubectl get kcp -A and kubectl get md -A

  • Machine details can be found in kubectl get machines -A and kubectl get openstackmachines -A

With minor version upgrade

• Upgrade to the Repeat for each major upgrade step

  • You can only do a single major upgrade at a time, e.g. 1.100.12 to 1.101.4, then 1.102.6

Troubleshooting

On the management cluster

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