go-plugin creates each secrets plugin's control socket under the process
TMPDIR (/tmp/pluginNNN by default). The daily systemd-tmpfiles-clean
deletes aged /tmp files, severing the socket of a long-lived plugin while
its process keeps running, so every request fails with rpc Unavailable /
dial unix /tmp/pluginNNN: no such file until a reload respawns it. This
took out the litellm engine (terraform-vault#112); the risk is shared by
every OpenBao plugin (gpg, rancher, gitea, ...).
Add a vault.service drop-in setting TMPDIR to a per-start RuntimeDirectory
on /run (tmpfs, no age-based cleanup), so plugin sockets can never be
reaped. The drop-in notifies a vault restart so the new TMPDIR takes
effect and plugins respawn with sockets under /run.
Claude-Session: https://claude.ai/code/session_01JUoARVdmhxKQHyyyp1pxeT
unkinben