Make PersistentVolume local path configurable (#1088)

* Make PersistentVolume local path configurable

* update volumeLocalPath in README

* Use volumeLocalPath variable instead of root object reference

helm-charts/easegress/README.md

@@ -66,6 +66,7 @@ The following table lists the configurable parameters of the MegaEase Easegress
 | service.adminPort | int | `31255` | nodePort for egctl access. |
 | cluster.primaryReplicas | int | `1` | number of easegress service that persists cluster data to disk |
 | cluster.volumeType | string | `emptyDir` | `emptyDir`: use pods internal filesystem that is not persisted when pod crashes. Use `emptyDir` only when primaryReplicas is 1. | `persistentVolume`, create as many persistenVolumes and persistentVolumeClaims as there are nodeHostnames.
+| cluster.volumeLocalPath | string | `/opt/easegress` | local path of persistenVolume on nodes |
 | cluster.nodeHostnames | list | `[]` | nodeHostnames are hostnames of VMs/Kubernetes nodes. Only used when `volumeType: persistentVolume`. Note that this require nodes to be static. |
 | secondaryReplicas | int | `0` | number of easegress service that not persists cluster data to disk. |
 | log.path | string | `/opt/easegress/log` | log path inside container |

helm-charts/easegress/templates/PersistentVolume.yaml

@@ -1,4 +1,5 @@
 {{- if eq .Values.cluster.volumeType "persistentVolume" }}
+{{- $volumeLocalPath := .Values.cluster.volumeLocalPath -}}
 {{- range $i, $hostname := .Values.cluster.nodeHostnames }}
 apiVersion: v1
 kind: PersistentVolume
@@ -13,7 +14,7 @@ spec:
  persistentVolumeReclaimPolicy: Delete
  storageClassName: easegress-storage
  local:
- path: /opt/easegress
+ path: {{$volumeLocalPath}}
  nodeAffinity:
  required:
  nodeSelectorTerms:

helm-charts/easegress/values.yaml

@@ -16,6 +16,7 @@ image:
 cluster:
  primaryReplicas: 1 # or 3,5,7
  volumeType: emptyDir # or persistentVolume
+ volumeLocalPath: /opt/easegress
  # nodeHostnames are hostnames of VMs/Kubernetes nodes. Only used when `volumeType: persistentVolume`.
  # Note that this require nodes to be static.
  nodeHostnames: