0fed2391b4
Add step missing in procedure and a note explaining where the procedure should be run. Remove references to CLI Change-Id: I83d11285bbb59356ee86fc86638814be78ecad8d Signed-off-by: Elisamara Aoki Goncalves <elisamaraaoki.goncalves@windriver.com>
95 lines
3.0 KiB
ReStructuredText
95 lines
3.0 KiB
ReStructuredText
.. _migrate-releases-from-helm-v2-to-helm-v3-9984e7aa7374:
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========================================
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Migrate Releases from Helm v2 to Helm v3
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========================================
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.. rubric:: |context|
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After upgrading a cluster, end users' Helm releases are not upgraded from
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version 2. Run a custom script to migrate the end users' Helm releases or
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installs to Helm v3.
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.. rubric:: |proc|
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#. Install the /helm-2to3 plugin.
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.. code-block:: none
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export HELM_LINTER_PLUGIN_NO_INSTALL_HOOK=true
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helm plugin install /usr/local/share/helm/plugins/2to3
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#. Fetch existing helmv2 config.
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.. code-block:: none
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cat >get_helmv2_config.sh<<'EOF'
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JSONPATH='{range .items[*]}{"\n"}{@.metadata.name}:{@.metadata.deletionTimestamp}{range @.status.conditions[*]}{":"}{@.type}={@.status}{end}{end}'
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ARMADA_PODS=( $(kubectl get pods -n armada \
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--kubeconfig=/etc/kubernetes/admin.conf \
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--selector=application=armada,component=api \
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--field-selector status.phase=Running \
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--output=jsonpath="$JSONPATH") )
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if [ $#ARMADA_PODS[@] -eq 0 ]; then
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echo "$NAME: ERROR - Could not find armada pod."
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exit 1
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fi# Get first available Running and Ready armada pod, with tiller container
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POD=""
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for LINE in "$ARMADA_PODS[@]"; do
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# match only Ready pods with nil deletionTimestamp
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if [[ $LINE =~ ::.*Ready=True ]]; then
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# extract pod name, it is first element delimited by :
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A=$( cut -d ':' -f 1 - <<< "$LINE" )
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P=$A[0]
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else
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continue
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fi
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kubectl --kubeconfig=/etc/kubernetes/admin.conf \
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cp armada/$P:tmp/.helm "$HOME"/.helm -c tiller
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RC=$?
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if [ $RC -eq 0 ]; then
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echo "$NAME: helmv2 config copied to $HOME/.helm"
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break
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else
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echo "$NAME: ERROR - failed to copy helm config from helmv2 (tiller) to host. (RETURNED: $RC)"
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exit 1
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fi
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done
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EOF
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#. Move the helm2 config to helm3.
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.. code-block:: none
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~(keystone-admin)]$ helm 2to3 move config
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#. Choose a Helm v2 release to migrate.
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.. code-block:: none
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~(keystone-admin)]$ helmv2-cli -- helm list -a
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#. Migrate a helm2 release, for example, myApplication.
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.. code-block:: none
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~(keystone-admin)]$ migrate_helm_release.py myApplication
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.. note::
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The script ``migrate_helm_release.py`` is part of the |prod| release
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package.
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#. Check if it migrated successfully.
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.. code-block:: none
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~(keystone-admin)]$ helm list -A -a
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#. The migrated release should not appear in helm2.
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.. code-block:: none
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~(keystone-admin)]$ helmv2-cli -- helm list -a
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