Ensure that holder-update DaemonSet pods are restarted on script changes

We add the script's md5sum as an annotation to the DaemonSet pod
template to force Kubernetes to recreate the pods when we modify the
script.

Author: simu

component/restart-holder-ds.libsonnet

@@ -94,6 +94,11 @@ local daemonset = kube.DaemonSet('syn-holder-updater') {
   },
   spec+: {
     template+: {
+      metadata+: {
+        annotations+: {
+          'script-checksum': std.md5(script),
+        },
+      },
       spec+: {
         serviceAccountName: serviceaccount.metadata.name,
         containers_: {

tests/golden/cephfs/rook-ceph/rook-ceph/50_restart_holder_ds.yaml

@@ -123,7 +123,8 @@ spec:
       name: syn-holder-updater
   template:
     metadata:
-      annotations: {}
+      annotations:
+        script-checksum: 488da91788ef6e501cece9d3d67ff8b0
       labels:
         app.kubernetes.io/component: rook-ceph
         app.kubernetes.io/managed-by: commodore

tests/golden/defaults/rook-ceph/rook-ceph/50_restart_holder_ds.yaml

@@ -123,7 +123,8 @@ spec:
       name: syn-holder-updater
   template:
     metadata:
-      annotations: {}
+      annotations:
+        script-checksum: 488da91788ef6e501cece9d3d67ff8b0
       labels:
         app.kubernetes.io/component: rook-ceph
         app.kubernetes.io/managed-by: commodore

tests/golden/openshift4/rook-ceph/rook-ceph/50_restart_holder_ds.yaml

@@ -123,7 +123,8 @@ spec:
       name: syn-holder-updater
   template:
     metadata:
-      annotations: {}
+      annotations:
+        script-checksum: 488da91788ef6e501cece9d3d67ff8b0
       labels:
         app.kubernetes.io/component: rook-ceph
         app.kubernetes.io/managed-by: commodore