The only reliable way of getting logs from the container at all times
is to let conmon be the logging agent.
Unfortunately, the k8s-file format does not handle multiline output
very well, which is something we often see on the stdout/stderr of
containers.
Therefore, add proper syslog support to conmon instead, and make sure
that podman knows enough about it to pass the information along to
conmon.
This is a complete redesign of how the system creates/deletes containers
from the running-config. Containers are now removed synchronously from
confd before any interfaces they may be using are removed, and created
in parallel, using a Finit task, well after confd has finished setting
up interfaces.
The logic previously provided by execd to retry container create on any
route/address changes, or periodically every 60 seconds, is now handled
by a new 'setup' command in the container wrapper script.
Additionally, container create is now split in wget/curl/podman pull of
the image and 'podman create'. This to both consolidate image fetching
and improve user feedback since most of the retry logic (above) revolves
around the image download.
Fixes#835
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Disable the default "podman pull" retry value. We use execd to retry
"podman create" on failure. Wihtout this change, a single container
can block start of other containers by 3 * 20 seconds. Now we only
block max 20 seconds before we try starting the next container.
Modern versions of podman (>= 5.0) have this --retry option, but it
does not have CNI, so this is a temporary workaround.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Joachim Wiberg