add a special /var/run tmpfs mountpoint to common (#1032)

* add a special /var/run tmpfs mountpoint to common

* common-test version in tests fix

charts/library/common/Chart.yaml

@@ -15,4 +15,4 @@ maintainers:
 name: common
 sources: null
 type: library
-version: 8.0.3
+version: 8.0.4

charts/library/common/tests/persistentvolumeclaim_test.go

@@ -80,7 +80,7 @@ func (suite *PersistenceVolumeClaimTestSuite) TestMetaData() {
         "app.kubernetes.io/instance":   "common-test",
         "app.kubernetes.io/managed-by": "Helm",
         "app.kubernetes.io/name":       "common-test",
-        "app.kubernetes.io/version":"latest",
+        "app.kubernetes.io/version":"1.6.1",
         "helm.sh/chart":                "common-test-3.1.4",
     }
 

charts/library/common/values.yaml

@@ -592,6 +592,22 @@ persistence:
     # -- If the `SizeMemoryBackedVolumes` feature gate is enabled, you can
     # specify a size for memory backed volumes.
     sizeLimit:  # 1Gi
+  # -- Create an emptyDir volume to share between all containers
+  # [[ref]]https://kubernetes.io/docs/concepts/storage/volumes/#emptydir)
+  # @default -- See below
+  varrun:
+    enabled: true
+    type: emptyDir
+    mountPath: /var/run
+
+    # -- Set the medium to "Memory" to mount a tmpfs (RAM-backed filesystem) instead
+    # of the storage medium that backs the node.
+    medium: Memory
+
+    # -- If the `SizeMemoryBackedVolumes` feature gate is enabled, you can
+    # specify a size for memory backed volumes.
+    sizeLimit:  # 1Gi
+
 
   # -- Example of a hostPath mount
   # [[ref]]https://kubernetes.io/docs/concepts/storage/volumes/#hostpath)