Re: Access journal log files within Docker Container using sd-journal API

[Sebastian Borchers <sebastian@xxxxxxxxxxxxx>]

Hello,

> Does "journalctl --file=…" work?
>       
      You mean inside the container, right? 
      I installed systemd in the container and tried the following
      command:

journalctl --file /var/log/journal/<machine-id>/system.journal

and it printed: Failed to open files: Protocol not supported

So no, it does indeed not work.

Sebastian

On 09/03/2021 10:36, Lennart Poettering wrote:

> On Di, 09.03.21 10:24, Sebastian Borchers (sebastian@xxxxxxxxxxxxx) wrote:
>
> > Hello,
> >
> > I have a question. I am trying to read journald log files within a
> > docker container on a host that is using systemd.
> > Inside the container, systemd is NOT running. I want to use a library
> > that uses the sd-journal API to read the logs within the container.
> >
> > I tried the following docker cmd:
> >
> > /docker run --rm --interactive --tty \//
> > //        --net host \//
> > //        //--privileged \//
> > //        //-v /run:/run \//
> > //        -v /var:/var \//
> > //        --mount type=bind,source=/sys/fs/cgroup,target=/sys/fs/cgroup \//
> > //        --mount type=bind,source=/sys/fs/fuse,target=/sys/fs/fuse \
> >         myContainer:latest
> > /
> >
> > When running my code inside this container, though, the log files are
> > always empty.
> > Running the same code on my host machine correctly yields the log files.
> >       
> Does "journalctl --file=…" work?
>
>
> Lennart
>
> --
> Lennart Poettering, Berlin
>     
  

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