[CI:DOCS] docs: generate systemd: XDG_RUNTIME_DIR

[vrothberg]

A conversation on the customer portal suggests that to add an extra note
about the requirement of XDG_RUNTIME_DIR to be set.

Signed-off-by: Valentin Rothberg [email protected]

[openshift-ci]

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[vrothberg]

@containers/podman-maintainers PTAL

[Luap99]

What's so special about podman generate systemd that it requires setting XDG_RUNTIME_DIR? Shouldn't this apply to all rootless podman commands?

[vrothberg]

What's so special about podman generate systemd that it requires setting XDG_RUNTIME_DIR?

There was a customer issue where this information would have helped the customer to immediately resolve the issue.

Shouldn't this apply to all rootless podman commands?

Yes and no. Podman is able to figure out the path on its own, if the variable isn't set. The man pages for generate systemd, however, need systemctl and journalctl to work which in turn require the variable to be set.

[rhatdan]

LGTM

[Luap99]

Thanks for clarification.

/lgtm