Access container via hostname instead of IP address
by Marcel van Leeuwen
Hi community,
I use Podman on CentOS 7.9 based distro. I use ClearOS 7.9 for my needs. Now I’m dabbling with Podman and have the following question when I used Docker I could use the hostname to call for another container instead of the IP address. How is this done with Podman? I must admit I’m not very experienced with using Docker or Podman on the CLI. I know some basic stuff but enjoy learning.
Regards,
Marcel van Leeuwen
9 months, 2 weeks
Python process unable to write files
by Josh Berkus
All,
I'm porting a legacy app to containers, and having an issue where
apparently it can't write files while running in podman.
Is there any reason why a python process, or child process, running as
container-root would be unable to write to either the ephemeral
filesystem of the container, or to mounted volumes?
Basically, here's the situation:
- pyhton app with many child processes
- all of them run as container-root
- app is supposed to write logs to files (yes, I know)
- app does not write any logs to any files; in fact, the log-dir
initialization appears to fail (no error messages, though, because it's
not logging)
- one other process which is supposed to write cache to a dir does not do so
- all of these directories are under /app/ a directory COPYd into the
image definition, not /var/ or home
- have tried both with these dirs as local to the container, and as
mounted volumes on the host system
- if I exec in to the container as container-root, I can write files to
those dirs
- SELinux denial log on the host does not show any denials
It is entirely possible that this is a problem with the legacy app and
is not a podman thing at all. I'm asking here because I want to
eliminate podman as a potential cause of the problem.
--
-- Josh Berkus
Kubernetes Community Architect
OSPO, OCTO
9 months, 3 weeks
