Set securityContext for deployer and ui

When pod security policies are used, the default restricted policy does
not allow root permissions. Even when a more permissive policy is
assigned to the service account, we need to inform k8s that we need root
permissions so that the correct policy can be selected.

Signed-off-by: Aaron Spettl <aaron@spettl.de>

chart/templates/deployment-driver.yaml

@@ -79,3 +79,5 @@ spec:
       - name: {{ .Values.defaultSettings.registrySecret }}
       {{- end }}
       serviceAccountName: longhorn-service-account
+      securityContext:
+        runAsUser: 0

chart/templates/deployment-ui.yaml

@@ -19,6 +19,8 @@ spec:
       - name: longhorn-ui
         image: "{{ .Values.image.longhorn.ui }}:{{ .Values.image.longhorn.uiTag }}"
         imagePullPolicy: Always
+        securityContext:
+          runAsUser: 0
         ports:
         - containerPort: 8000
           name: http

deploy/longhorn.yaml

@@ -348,6 +348,8 @@ spec:
       - name: longhorn-ui
         image: longhornio/longhorn-ui:v0.8.1
         imagePullPolicy: Always
+        securityContext:
+          runAsUser: 0
         ports:
         - containerPort: 8000
           name: http
@@ -439,6 +441,8 @@ spec:
       #imagePullSecrets:
       #- name:
       serviceAccountName: longhorn-service-account
+      securityContext:
+        runAsUser: 0
 ---
 kind: StorageClass
 apiVersion: storage.k8s.io/v1