Created Using Podman (markdown)

Using-Podman.md

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+[Podman](https://podman.io/) is a daemonless alternative to Docker, which is mostly compatible with Docker containers.
+
+# Creating a systemd service file
+Podman is easier to run in systemd than Docker due to its daemonless architechture. It comes with a handy generate command which can generate systemd files, here's a [good article going into more detail](https://www.redhat.com/sysadmin/podman-shareable-systemd-services).
+```sh
+$ podman run -d --name bitwarden -v /bw-data/:/data/:Z -e ROCKET_PORT=8080 -p 8080:8080 bitwardenrs/server:latest
+54502f309f3092d32b4c496ef3d099b270b2af7b5464e7cb4887bc16a4d38597
+$ podman generate systemd --name bitwarden
+# container-foo.service
+# autogenerated by Podman 1.6.2
+# Tue Nov 19 15:49:15 CET 2019
+
+[Unit]
+Description=Podman container-foo.service
+Documentation=man:podman-generate-systemd(1)
+
+[Service]
+Restart=on-failure
+ExecStart=/usr/bin/podman start bitwarden
+ExecStop=/usr/bin/podman stop -t 10 bitwarden
+KillMode=none
+Type=forking
+PIDFile=/run/user/1000/overlay-containers/54502f309f3092d32b4c496ef3d099b270b2af7b5464e7cb4887bc16a4d38597/userdata/conmon.pid
+```
+
+You can provide a `--files` flag to dedicate a specific file to output the systemd service file to. With this we can enable and start the container as any normal service file.
+```sh
+$ systemctl --user enable /etc/systemd/system/container-bitwarden.service
+$ systemctl --user start container-bitwarden.service
+```
+
+## New container every restart
+If we want to create a new container every time the service starts we can edit the service file to contain the following:
+```sh
+[Service]
+Restart=on-failure
+ExecStartPre=/usr/bin/rm -f /%t/%n-pid /%t/%n-cid
+ExecStart=/usr/bin/podman run --conmon-pidfile /%t/%n-pid --env-file=/home/spytec/Bitwarden/bitwarden.conf -d -p 8080:8080 -v /home/spytec/Bitwarden/bw-data:/data/:Z bitwardenrs/server:latest
+ExecStop=/usr/bin/podman rm -f --cid-file /%t/%n-cid
+KillMode=none
+Type=forking
+PIDFile=/%t/%n-pid
+```
+Where `bitwarden.conf` environment file can contain all the container environment values you need
+```conf
+ROCKET_PORT=8080
+```
+
+If you want the container to have a specific name, you might need to add `ExecStartPre=/usr/bin/podman rm -i -f bitwarden` if the process isn't cleaned up correctly.
+
+# Troubleshooting
+## Debugging systemd service file
+If the host goes down or the container crashes, the systemd service file should automatically stop the existing container and spin it up again. We can find the error through `journalctl --user -u container-bitwarden -t 100`. 
+
+Most of the time the errors we see can be fixed by simply upping the timeout in podman command in the service file.