add support for persistence.subPath option (#263)

Hello,

PR adds a `persistence.subPath` option to provide user more flexibility on mounting the `data` PV.
https://kubernetes.io/docs/concepts/storage/volumes/#using-subpath

The setting is similar to e.g. `primary.persistence.subPath` in MariaDB helm chart:
https://github.com/bitnami/charts/tree/master/bitnami/mariadb

Co-authored-by: Aleksey Sergey <sergey.aleksey90@gmail.com>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/263
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Reviewed-by: luhahn <luhahn@noreply.gitea.io>
Co-authored-by: aleksey.sergey <aleksey.sergey@noreply.gitea.io>
Co-committed-by: aleksey.sergey <aleksey.sergey@noreply.gitea.io>

README.md

@@ -581,7 +581,7 @@ gitea:
 | `extraVolumeMounts`                         | Additional volume mounts for the Gitea containers                    | `{}`    |
 | `initPreScript`                             | Bash script copied verbatim to start of init container               |         |
 | `podSecurityContext.fsGroup`                | Set the shared file system group for all containers                  | 1000    |
-| `containerSecurityContext`                  | Run init and gitea containers as a specific securityContext          | `{}`    |
+| `containerSecurityContext`                  | Run init and Gitea containers as a specific securityContext          | `{}`    |
 | `schedulerName`                             | Use an alternate scheduler, e.g. "stork"                             |         |
 
 ### Image
@@ -602,6 +602,7 @@ gitea:
 | `persistence.size`          | Size for persistence to store repo information             | `10Gi`  |
 | `persistence.accessModes`   | AccessMode for persistence                                 |         |
 | `persistence.storageClass`  | Storage class for repository persistence                   |         |
+| `persistence.subPath`       | Subdirectory of the volume to mount at                     |         |
 | `persistence.labels`        | Labels for the persistence volume claim to be created      | `{}`    |
 | `persistence.annotations`   | Annotations for the persistence volume claim to be created | `{}`    |
 

templates/gitea/statefulset.yaml

@@ -62,6 +62,9 @@ spec:
               mountPath: /tmp
             - name: data
               mountPath: /data
+              {{- if .Values.persistence.subPath }}
+              subPath: {{ .Values.persistence.subPath }}
+              {{- end }}
             {{- if .Values.extraVolumeMounts }}
             {{- toYaml .Values.extraVolumeMounts | nindent 12 }}
             {{- end }}
@@ -89,6 +92,9 @@ spec:
               mountPath: /tmp
             - name: data
               mountPath: /data
+              {{- if .Values.persistence.subPath }}
+              subPath: {{ .Values.persistence.subPath }}
+              {{- end }}
             {{- if .Values.extraVolumeMounts }}
             {{- toYaml .Values.extraVolumeMounts | nindent 12 }}
             {{- end }}
@@ -161,6 +167,9 @@ spec:
               mountPath: /tmp
             - name: data
               mountPath: /data
+              {{- if .Values.persistence.subPath }}
+              subPath: {{ .Values.persistence.subPath }}
+              {{- end }}
             {{- if .Values.extraVolumeMounts }}
             {{- toYaml .Values.extraVolumeMounts | nindent 12 }}
             {{- end }}
@@ -227,6 +236,9 @@ spec:
               mountPath: /tmp
             - name: data
               mountPath: /data
+              {{- if .Values.persistence.subPath }}
+              subPath: {{ .Values.persistence.subPath }}
+              {{- end }}
             {{- if .Values.extraVolumeMounts }}
             {{- toYaml .Values.extraVolumeMounts | nindent 12 }}
             {{- end }}

values.yaml

@@ -121,6 +121,7 @@ persistence:
   labels: {}
   annotations: {}
   # storageClass:
+  # subPath:
 
 # additional volumes to add to the Gitea statefulset.
 extraVolumes: