Set imagePullPolicy in the deployment templates to Always

Update prepare-release.sh so that the policy will be set to IfNotPresent
for releases.

nfd-daemonset-combined.yaml.template

@@ -68,6 +68,7 @@ spec:
               fieldRef:
                 fieldPath: spec.nodeName
           image: gcr.io/k8s-staging-nfd/node-feature-discovery:master
+          imagePullPolicy: Always
           name: nfd-master
           securityContext:
             allowPrivilegeEscalation: false
@@ -83,6 +84,7 @@ spec:
               fieldRef:
                 fieldPath: spec.nodeName
           image: gcr.io/k8s-staging-nfd/node-feature-discovery:master
+          imagePullPolicy: Always
           name: nfd-worker
           securityContext:
             allowPrivilegeEscalation: false

nfd-master.yaml.template

@@ -80,6 +80,7 @@ spec:
               fieldRef:
                 fieldPath: spec.nodeName
           image: gcr.io/k8s-staging-nfd/node-feature-discovery:master
+          imagePullPolicy: Always
           name: nfd-master
           securityContext:
             allowPrivilegeEscalation: false

nfd-prune.yaml.template

@@ -73,6 +73,7 @@ spec:
       containers:
         - name: nfd-master
           image: gcr.io/k8s-staging-nfd/node-feature-discovery:master
+          imagePullPolicy: Always
           securityContext:
             allowPrivilegeEscalation: false
             capabilities:

nfd-worker-daemonset.yaml.template

@@ -22,6 +22,7 @@ spec:
               fieldRef:
                 fieldPath: spec.nodeName
           image: gcr.io/k8s-staging-nfd/node-feature-discovery:master
+          imagePullPolicy: Always
           name: nfd-worker
           securityContext:
             allowPrivilegeEscalation: false

nfd-worker-job.yaml.template

@@ -31,6 +31,7 @@ spec:
               fieldRef:
                 fieldPath: spec.nodeName
           image: gcr.io/k8s-staging-nfd/node-feature-discovery:master
+          imagePullPolicy: Always
           name: nfd-worker
           securityContext:
             allowPrivilegeEscalation: false

scripts/prepare-release.sh

@@ -66,7 +66,9 @@ sed s"!node-feature-discovery/v.*/!node-feature-discovery/$release/!" -i README.
 
 # Patch deployment templates
 echo Patching '*.yaml.template' to use $container_image
-sed -E s",^([[:space:]]+)image:.+$,\1image: $container_image," -i *yaml.template
+sed -E -e s",^([[:space:]]+)image:.+$,\1image: $container_image," \
+       -e s",^([[:space:]]+)imagePullPolicy:.+$,\1imagePullPolicy: IfNotPresent," \
+       -i *yaml.template
 
 # Patch e2e test
 echo Patching test/e2e/node_feature_discovery.go flag defaults to k8s.gcr.io/nfd/node-feature-discovery and $release