Can we use nfs volume plugin to maintain the High Availability and Disaster Recovery among the kubernetes cluster?
I am running the pod with MongoDB. Getting the error
chown: changing ownership of '/data/db': Operation not permitted .
Cloud any body, Please suggest me how to resolve the error? (or)
Is any alternative volume plugin is suggestible to achieve HA- DR in kubernetes cluster?
chown: changing ownership of '/data/db': Operation not permitted .
You'll want to either launch the mongo container as root, so that you can chown the directory, or if the image prohibits it (as some images already have a USER mongo clause that prohibits the container from escalating privileges back up to root), then one of two things: supersede the user with a securityContext stanza in containers: or use an initContainer: to preemptively change the target folder to be the mongo UID:
Approach #1:
containers:
- name: mongo
image: mongo:something
securityContext:
runAsUser: 0(which may require altering your cluster's config to permit such a thing to appear in a PodSpec)
Approach #2 (which is the one I use with Elasticsearch images):
initContainers:
- name: chmod-er
image: busybox:latest
command:
- /bin/chown
- -R
- "1000" # or whatever the mongo UID is, use string "1000" not 1000 due to yaml
- /data/db
volumeMounts:
- name: mongo-data # or whatever
mountPath: /data/db
containers:
- name: mongo # then run your container as before