T6477: Add documentation for telegraf loki output

README.md

@@ -94,7 +94,7 @@ $ git clone https://github.com/vyos/vyos-documentation.git
 
 $ cd vyos-documentation
 
-$ docker run --rm -it -v "$(pwd)":/vyos -w /vyos/docs -e GOSU_UID=$(id -u) -e GOSU_GID=$(id -g) vyos/vyos-documentation make html
+$ docker run --platform linux/amd64 --rm -it -v "$(pwd)":/vyos:Z -w /vyos/docs -e GOSU_UID=$(id -u) -e GOSU_GID=$(id -g) vyos/vyos-documentation make html
 
 # For sphinx autobuild
 $ docker run --rm -it -p 8000:8000 -v "$(pwd)":/vyos -w /vyos/docs -e GOSU_UID=$(id -u) -e GOSU_GID=$(id -g) vyos/vyos-documentation make livehtml

docs/configuration/service/monitoring.rst

@@ -130,6 +130,36 @@ and logs from your routers.
    Remote URL
 
 
+Loki
+====
+
+Telegraf can be used to send logs to Loki using tags as labels.
+
+.. cfgcmd:: set service monitoring telegraf loki port <port>
+
+   Remote Loki port
+
+   Default is 3100
+
+.. cfgcmd:: set service monitoring telegraf loki url <url>
+
+   Remote Loki url
+
+.. cfgcmd:: set service monitoring telegraf loki authentication username <username>
+.. cfgcmd:: set service monitoring telegraf loki authentication password <password>
+
+   HTTP basic authentication.
+
+   If either is set both must be set.
+
+.. cfgcmd:: set service monitoring telegraf loki metric-name-label <label>
+
+   Label to use for the metric name when sending metrics.
+
+   If set to an empty string, the label will not be added.
+   This is NOT recommended, as it makes it impossible to differentiate
+   between multiple metrics.
+
 Example
 =======