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Merge pull request 'add docs how to create a systemd unit for babelweb2' (#29) from mark22k/docs:babelweb2_systemd into master 

Reviewed-on: https://codeberg.org/CRXN/docs/pulls/29
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Marek Küthe 2023-01-11 07:23:40 +00:00
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docs/routing/babeld/babelweb2.md
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@ -20,4 +20,46 @@ Now you have an executable program `babelweb2`.
By default, the web interface runs on port 8080. You can also specify a different endpoint with the `-http` parameter.
babelweb2 uses the local configuration interface of babeld. This must have been activated beforehand. babeld assumes that this is active on `[::1]:33123`. Alternatively, you can specify the endpoint with the `-node=` flag.
## Install as Systemd Unit
In order to install babelweb2 as a systemd unit, we must first install the necessary files into the system. For this we can execute the following commands in the babelweb2 git directory:
```
sudo cp babelweb2 /usr/local/bin
sudo mkdir -p /usr/share/babelweb2/
sudo cp -r ./static/ /usr/share/babelweb2/
```
After that we create the unit file `/etc/systemd/system/babelweb2.service`:
```
[Unit]
Description=Yet Another Monitoring Tool for the Babel routing daemon
Documentation=https://github.com/Vivena/babelweb2
[Service]
LimitNOFILE=1048576
LimitNPROC=512
DynamicUser=yes
EnvironmentFile=/etc/default/babelweb2
ExecStart=/usr/local/bin/babelweb2 -http $PORT -static $STATIC_DIR
ExecReload=/bin/kill -SIGUSR1 $MAINPID
Restart=on-failure
[Install]
WantedBy=multi-user.target
```
After that you can reload the units:
```
systemctl daemon-reload
```
For babelweb2 to work, we still need to specify the arguments. For this we can create an environment file `/etc/default/babelweb2`:
```
PORT=:<port>
STATIC_DIR=/usr/share/babelweb2/static/
```
Here we replace `<port>` with the port on which the Babelweb2 interface should be available. The default is 8080, but you can also use 33124, for example.
babelweb2 uses the local configuration interface of babeld. This must have been activated beforehand. babeld assumes that this is active on `[::1]:33123`. Alternatively, you can specify the endpoint with the `-node` flag.