CODEWITHSUNDEEP
dockerkubernetes
Gomo
Gomo

Reputation: 47

How do multiple containers access the directory in other container

How do multiple containers(create from same image) access the directory(packaged in the image) in other container? There are some ways not elegant:

  1. Mount directory into a shared volume or host path. When a container changed files in the directory, other containers will perceive it. Is there any idea to make shared volume working like copy-on-write?
  2. Create a volume for each container, and copy directory into the volume. In this way, the directory have to save multiple copies in disk.

I've browsed this problem [https://stackoverflow.com/questions/29550736/can-i-mount-docker-host-directory-as-copy-on-write-overlay], I don't want containers to run in privileged mode. Is there a better idea?

Upvotes: 0

Views: 2042

Answers (1)

queeg
queeg

Reputation: 9384

Per design one container cannot access the files inside another container. You will need to store the data outside of a container, then mount it via volume mount or bind mount. Alternatively you could try to perform some NFS/SMB/... mount of shared storage inside the container.

This is completely independent from running a container in host mode.

Upvotes: 3

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