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docs/doc/source/usertasks/kubernetes/migrate-releases-from-helm-v2-to-helm-v3-a6066193c2a8.rst
Keane Lim 45999f76e7 Added instructions for migrating releases from Helm v2 to Helm v3 
Change-Id: I3566f689f7c39e93e10e18caf9d4a6ee8e8f6b07
Signed-off-by: Keane Lim <keane.lim@windriver.com>
2021-10-05 10:51:36 -04:00

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Migrate Releases from Helm v2 to Helm v3

After upgrading a cluster, end users' Helm releases are not upgraded from version 2. Run a custom script to migrate the end users' Helm releases or installs to Helm v3.

  1. Install the /helm-2to3 plugin.

    ~(keystone-admin)]$ mkdir plugin
wget https://github.com/helm/helm-2to3/releases/download/v0.9.0/helm-2to3_0.9.0_linux_amd64.tar.gz
pushd plugin/
tar -xvzf ../helm-2to3_0.9.0_linux_amd64.tar.gz
mkdir bin
cp 2to3 bin
popd
export HELM_LINTER_PLUGIN_NO_INSTALL_HOOK=true
helm plugin install ./plugin

  2. Move the helm2 config to helm3.

    ~(keystone-admin)]$ helm 2to3 move config

  3. Choose a Helm v2 release to migrate.

    ~(keystone-admin)]$ helmv2-cli -- helm list -a

  4. Migrate a helm2 release, for example, myApplication.

    ~(keystone-admin)]$ ./migrate_helm_release.py myApplication

  5. Check if it migrated successfully.

    ~(keystone-admin)]$ helm list -A -a

  6. The migrated release should not appear in helm2.

    ~(keystone-admin)]$ helmv2-cli -- helm list -a