document systemd-tmpfiles

_toc.yml

@@ -84,6 +84,7 @@ chapters:
               - file: admin-guide/configuration/files/afs
               - file: admin-guide/configuration/files/mount
               - file: admin-guide/configuration/files/distribute_files
+              - file: admin-guide/configuration/files/systemd_tmpfiles
               - file: admin-guide/configuration/files/partitioning
               - file: admin-guide/configuration/files/resize_vm_disk
               - file: admin-guide/configuration/files/nfs_server

admin-guide/configuration/files/systemd_tmpfiles.md

@@ -0,0 +1,30 @@
+# systemd-tmpfiles
+
+[`systemd-tmpfiles`](https://www.freedesktop.org/software/systemd/man/latest/systemd-tmpfiles.html) can be used to create, delete, and clean up files and directories.
+The system-wide configuration is in [`/etc/tmpfiles.d/*.conf`](https://www.freedesktop.org/software/systemd/man/latest/tmpfiles.d.html).
+
+
+## Hiera Configuration
+
+In Hiera below `profile::tmpfiles:` you can set several use cases (here `podman`) with individual configuration at `content` which contains the full configuration as documented in [`tmpfiles.d(5)`](https://www.freedesktop.org/software/systemd/man/latest/tmpfiles.d.html):
+
+```
+profile::tmpfiles:
+  podman:
+    content: |
+      # This file is distributed by Puppet: profile::tmpfiles
+      #   See tmpfiles.d(5) for details
+
+      # Remove podman temporary directories on each boot
+      # https://github.com/containers/podman/discussions/23193
+      R! /tmp/containers-user-*
+      R! /tmp/podman-run-*
+```
+
+To undo above configuration requires
+
+```
+profile::tmpfiles:
+  podman:
+    ensure: absent
+```