Helm release migration from v2 to v3 (r5,r6,r7,r8,dsR6,dsR7,dsR8)

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>

doc/source/admintasks/kubernetes/migrate-releases-from-helm-v2-to-helm-v3-9984e7aa7374.rst

@@ -16,15 +16,47 @@ installs to Helm v3.
 
     .. code-block:: none
 
-        ~(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
+        helm plugin install /usr/local/share/helm/plugins/2to3
+
+#.  Fetch existing helmv2 config.
+
+    .. code-block:: none
+
+        cat >get_helmv2_config.sh<<'EOF'
+        JSONPATH='{range .items[*]}{"\n"}{@.metadata.name}:{@.metadata.deletionTimestamp}{range @.status.conditions[*]}{":"}{@.type}={@.status}{end}{end}'
+        ARMADA_PODS=( $(kubectl get pods -n armada \
+                        --kubeconfig=/etc/kubernetes/admin.conf \
+                        --selector=application=armada,component=api \
+                        --field-selector status.phase=Running \
+                        --output=jsonpath="$JSONPATH") )
+        if [ $#ARMADA_PODS[@] -eq 0 ]; then
+            echo "$NAME: ERROR - Could not find armada pod."
+            exit 1
+        fi# Get first available Running and Ready armada pod, with tiller container
+        POD=""
+        for LINE in "$ARMADA_PODS[@]"; do
+            # match only Ready pods with nil deletionTimestamp
+            if [[ $LINE =~ ::.*Ready=True ]]; then
+                # extract pod name, it is first element delimited by :
+                A=$( cut -d ':' -f 1 - <<< "$LINE" )
+                P=$A[0]
+            else
+                continue
+            fi
+            kubectl  --kubeconfig=/etc/kubernetes/admin.conf \
+                cp armada/$P:tmp/.helm "$HOME"/.helm -c tiller
+            RC=$?
+            if [ $RC -eq 0 ]; then
+                echo "$NAME: helmv2 config copied to $HOME/.helm"
+                break
+            else
+                echo "$NAME: ERROR - failed to copy helm config from helmv2 (tiller) to host. (RETURNED: $RC)"
+                exit 1
+            fi
+        done
+        EOF
+
 
 #.  Move the helm2 config to helm3.
 
@@ -42,7 +74,12 @@ installs to Helm v3.
 
     .. code-block:: none
 
-        ~(keystone-admin)]$ ./migrate_helm_release.py myApplication
+        ~(keystone-admin)]$ migrate_helm_release.py myApplication
+
+    .. note::
+
+        The script ``migrate_helm_release.py`` is part of the |prod| release
+        package.
 
 #.  Check if it migrated successfully.
 

doc/source/usertasks/kubernetes/migrate-releases-from-helm-v2-to-helm-v3-a6066193c2a8.rst

@@ -16,15 +16,47 @@ installs to Helm v3.
 
     .. code-block:: none
 
-        ~(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
+        helm plugin install /usr/local/share/helm/plugins/2to3
+
+#.  Fetch existing helmv2 config.
+
+    .. code-block:: none
+
+        cat >get_helmv2_config.sh<<'EOF'
+        JSONPATH='{range .items[*]}{"\n"}{@.metadata.name}:{@.metadata.deletionTimestamp}{range @.status.conditions[*]}{":"}{@.type}={@.status}{end}{end}'
+        ARMADA_PODS=( $(kubectl get pods -n armada \
+                        --kubeconfig=/etc/kubernetes/admin.conf \
+                        --selector=application=armada,component=api \
+                        --field-selector status.phase=Running \
+                        --output=jsonpath="$JSONPATH") )
+        if [ $#ARMADA_PODS[@] -eq 0 ]; then
+            echo "$NAME: ERROR - Could not find armada pod."
+            exit 1
+        fi# Get first available Running and Ready armada pod, with tiller container
+        POD=""
+        for LINE in "$ARMADA_PODS[@]"; do
+            # match only Ready pods with nil deletionTimestamp
+            if [[ $LINE =~ ::.*Ready=True ]]; then
+                # extract pod name, it is first element delimited by :
+                A=$( cut -d ':' -f 1 - <<< "$LINE" )
+                P=$A[0]
+            else
+                continue
+            fi
+            kubectl  --kubeconfig=/etc/kubernetes/admin.conf \
+                cp armada/$P:tmp/.helm "$HOME"/.helm -c tiller
+            RC=$?
+            if [ $RC -eq 0 ]; then
+                echo "$NAME: helmv2 config copied to $HOME/.helm"
+                break
+            else
+                echo "$NAME: ERROR - failed to copy helm config from helmv2 (tiller) to host. (RETURNED: $RC)"
+                exit 1
+            fi
+        done
+        EOF
+
 
 #.  Move the helm2 config to helm3.
 
@@ -42,7 +74,12 @@ installs to Helm v3.
 
     .. code-block:: none
 
-        ~(keystone-admin)]$ ./migrate_helm_release.py myApplication
+        ~(keystone-admin)]$ migrate_helm_release.py myApplication
+
+    .. note::
+
+        The script ``migrate_helm_release.py`` is part of the |prod| release
+        package.
 
 #.  Check if it migrated successfully.