Add maintenance script.

Author: mnlipp

dev-example/.gitignore

@@ -1,3 +1,4 @@
 /test-vm-ci.yaml
 /kubeconfig.yaml
 /crds/
+/.vm-operator-cmd.rc

dev-example/pool-action.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+function usage() {
+  cat >&2 <<EOF
+Usage: $0 pool-name action
+Applys action to all VMs in the pool.
+
+  --context                   Context to be passed to kubectl (required)
+  -n, --namespace             Namespace to be passed to kubectl
+EOF
+  exit 1  
+}
+
+unset pool
+unset action
+unset context
+namespace=default
+
+if [ -r .vm-operator-cmd.rc ]; then
+  . .vm-operator-cmd.rc
+fi
+
+while [ "$#" -gt 0 ]; do
+  case "$1" in
+    --context) shift; context="$1";;
+    --context=*) IFS='=' read -r option value <<< "$1"; context="$value";;
+    -n|--namespace) shift; namespace="$1";;
+    -*) echo >&2 "Unknown option: $1"; exit 1;;
+    *) if [ ! -v pool ]; then
+         pool="$1"
+       elif [ ! -v action ]; then
+         action="$1"
+       else
+         usage
+       fi;;
+  esac
+  shift
+done
+
+if [ ! -v pool -o ! -v "action" -o ! -v context ]; then
+  echo >&2 "Missing arguments or context not set."
+  echo >&2
+  usage
+fi
+case "$action" in
+  "start"|"stop"|"delete"|"delete-disks") ;;
+  *) usage;;
+esac
+
+kubectl --context="$context" -n "$namespace" get vms -o json \
+  | jq -r '.items[] | select(.spec.pools | contains(["'${pool}'"])) | .metadata.name' \
+| while read vmName; do
+    case "$action" in
+      start) kubectl --context="$context" -n "$namespace" patch vms "$vmName" \
+        --type='merge' -p '{"spec":{"vm":{"state":"Running"}}}';;
+      stop) kubectl --context="$context" -n "$namespace" patch vms "$vmName" \
+        --type='merge' -p '{"spec":{"vm":{"state":"Stopped"}}}';;
+      delete) kubectl --context="$context" -n "$namespace" delete vm/"$vmName";;
+      delete-disks) kubectl --context="$context" -n "$namespace" delete \
+        pvc -l app.kubernetes.io/instance="$vmName" ;;
+    esac
+done