adds support for arm64 to microbot example of the kubernetes-worker charm

cluster/juju/layers/kubernetes-worker/actions/microbot

@@ -21,7 +21,7 @@ from charmhelpers.core.hookenv import action_get
 from charmhelpers.core.hookenv import action_set
 from charmhelpers.core.hookenv import unit_public_ip
 from charms.templating.jinja2 import render
-from subprocess import call
+from subprocess import call, check_output
 
 os.environ['PATH'] += os.pathsep + os.path.join(os.sep, 'snap', 'bin')
 
@@ -30,6 +30,9 @@ context['replicas'] = action_get('replicas')
 context['delete'] = action_get('delete')
 context['public_address'] = unit_public_ip()
 
+arch = check_output(['dpkg', '--print-architecture']).rstrip()
+context['arch'] = arch.decode('utf-8')
+
 if not context['replicas']:
     context['replicas'] = 3
 

cluster/juju/layers/kubernetes-worker/templates/microbot-example.yaml

@@ -18,7 +18,7 @@ spec:
         app: microbot
     spec:
       containers:
-      - image: dontrebootme/microbot:v1
+      - image: cdkbot/microbot-{{ arch }}:latest
         imagePullPolicy: ""
         name: microbot
         ports: