[ccache] Shared ccache directory between docker containers

Ragnar Rova ragnar.rova at gmail.com
Fri Feb 5 11:18:31 UTC 2016

I made sure hostname is unique now.

On Fri, Feb 5, 2016 at 12:05 PM, Ragnar Rova <ragnar.rova at gmail.com> wrote:

> Hello list.
> Is it safe to share the ccache directory between docker containers wrt to
> locking?
> We use host mounts (i.e. not volumes) like this:
> docker run -v
> /var/tmp/docker-build-ccache:/var/tmp/docker-build-ccache my-compile-job
> We sometimes see issues when simultaneous jobs are run.
> docker storage Driver: aufs
> Backing Filesystem: extfs
> ccache version 3.1.10
> ccache: FATAL: Failed to open
> /var/tmp/docker-build-ccache/tmp/tmp.cpp_stderr.docker-host.21810: No such
> file or directory
> The hostname of these concurrent containers is the same. PID:s in docker
> are translated (they are in their own PID namespace).

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