Commit 03a22aeb authored by Matt Holt's avatar Matt Holt

Merge pull request #683 from klingtnet/feat/systemd

systemd unit file
parents 18332df3 6c2bf36d
# systemd unit for caddy
Please do not hesitate to ask [me](mailto:klingt.net+caddy@gmail.com) if you've any questions.
## Quickstart
- install the unit configuration file: `cp caddy@.service /etc/systemd/system`
- reload the systemd daemon: `systemctl deamon-reload`
- make sure to [configure](#configuration) the service unit before starting caddy
- start caddy: `systemctl start caddy@someuser`
- enable the service (automatically start on boot): `systemctl enable caddy@someuser`
- the `.caddy` folder will be created inside the users home directory that runs caddy, i.e. `/home/someuser/.caddy` for `systemctl start caddy@someuser`
## Configuration
- do not edit the systemd unit directly, use systemd's builtin tools:
- `systemctl edit caddy@` to make user local modifications to the service unit
- `systemctl edit --full caddy@` to make system-wide modifications
- in most cases it's enough to adapt the `ExecStart` directive:
- `systemctl edit caddy@`
- systemd needs absolute paths, therefore make sure that the path to caddy is correct
- example:
```ini
[Service]
; reset the original setting
ExecStart=
ExecStart=/usr/bin/caddy -conf="/etc/caddy/myCaddy.conf" -agree -email="my@mail.address"
```
- to view your configuration use `systemctl cat caddy@`
- double check the permissions of your web root path to make sure that caddy can access it as its run user and group
## Tips
- use `log stdout` and `errors stderr` in your Caddyfile to make use of `journalctl`
- `journalctl` is systemd's log query tool
- lets say you want all the log entries for caddy since the last boot beginning from the last entry: `journalctl --reverse --boot --unit caddy@someuser`
- maybe you want to follow caddys log output: `journalctl -fu caddy@someuser`
- to send a signal to a service units main PID, e.g. let caddy reload its config: `systemctl kill --signal=USR1 caddy@someuser`
; see `man systemd.unit` for configuration details
; the man section also explains *specifiers* `%x`
[Unit]
Description=Caddy HTTP/2 web server %I
Documentation=https://caddyserver.com/docs
After=network.target
[Service]
; run user and group for caddy
User=%i
Group=http
ExecStart=/usr/bin/caddy -agree=true -conf=/etc/caddy/Caddyfile
Restart=on-failure
; create a private temp folder that is not shared with other processes
PrivateTmp=true
; limit the number of file descriptors, see `man systemd.exec` for more limit settings
LimitNOFILE=8192
[Install]
WantedBy=multi-user.target
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