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Example of using an init container chown the data in a pvc as a pod starts.
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# Example of using an init container chown the data in a pvc as a pod starts. Useful for migrating | |
# which user and group your containers run as. | |
# Works by having an init container mount your data, chmod it before it's consumed by your main container. | |
--- | |
apiVersion: apps/v1 | |
kind: StatefulSet | |
metadata: | |
name: mysql-statefull | |
spec: | |
podManagementPolicy: OrderedReady | |
replicas: 1 | |
revisionHistoryLimit: 3 | |
selector: | |
matchLabels: | |
app: mysql | |
serviceName: mysql | |
template: | |
metadata: | |
labels: | |
app: mysql | |
spec: | |
initContainers: | |
- name: chowner-mysql-vol-01 | |
image: registry.hub.docker.com/library/alpine:3.12.0 | |
# This is where the magic hapens, find files with old UID (1004) and chown with new UID (1005) and GID (2005) | |
command: ["find", "/mnt", "-user", "1004", "-group", "2004", "-exec", "chown", "1005:2005", "{}", "+"] | |
securityContext: | |
readOnlyRootFilesystem: true | |
capabilities: | |
drop: ["all"] | |
add: ["CHOWN"] | |
runAsUser: 0 | |
runAsNonRoot: false | |
volumeMounts: | |
- name: mysql-vol-01 | |
mountPath: /mnt | |
containers: | |
- name: mysql | |
env: | |
# Use secret in real usage | |
- name: MYSQL_ROOT_PASSWORD | |
value: password | |
image: registry.hub.docker.com/library/mysql:8.0.21 | |
ports: | |
- containerPort: 3306 | |
name: mysql | |
protocol: TCP | |
securityContext: | |
allowPrivilegeEscalation: false | |
volumeMounts: | |
- name: mysql-vol-01 | |
mountPath: /var/lib/mysql | |
securityContext: | |
runAsUser: 1005 | |
runAsGroup: 2005 | |
runAsNonRoot: true | |
fsGroup: 3005 | |
terminationGracePeriodSeconds: 10 | |
volumeClaimTemplates: | |
- apiVersion: v1 | |
kind: PersistentVolumeClaim | |
metadata: | |
name: mysql-vol-01 | |
spec: | |
accessModes: | |
- ReadWriteMany | |
resources: | |
requests: | |
storage: 1Gi | |
volumeMode: Filesystem |
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