Healthcheck causes errors in rootless mode

When trying to run a container using podman as an unprivileged user (rootless mode), the healthcheck that was added in 2.4.0 causes the container to produce error messages as the container is created.

This looks to have now been addressed in podman (handling healthchecks in rootless mode), but that is not present in at least the versions available to CentOS 7 and Ubuntu 18.04.

To mitigate the healthcheck errors it is possible to remove it using --health-cmd none:

This shows the next issues that would be encountered (expectation of reserved port usage inside the container), suggestions to resolve those issues are in :

Suggested improvements are as follows:

• Run the internal Alertmanager on a non-standard port, which allows them to run alongside each other

• Run all of the internal services on non-standard, non-privileged ports and do not use wildcard bind addresses

• Provide an entrypoint that either reads a definition file, or ENV variables to set addresses and ports