Enable Prometheus Formatted Metrics for Synology Docker

1. Edit /var/packages/Docker/etc/dockerd.json:

   {
     "experimental" : true,
     "metrics-addr" : "0.0.0.0:9999",
   }
   

2. Restart the Docker package

   synoservice --restart pkgctl-Docker
   

Set Custom DNS Servers

1. Edit /var/packages/Docker/etc/dockerd.json:

   {
     "dns": ["SERVER_0", "SERVER_1"]
   }
   

2. Restart the Docker package

Setup Unprivileged Docker Access

1. Add your user to the docker group:

   synogroup --add docker <your_username>
   

2. Fix permissions on the Docker socket:

   chown root:docker /var/run/docker.sock
   

Ship Docker Logs to Loki

1. Install the Loki driver plugin

   docker plugin \
     install \
     grafana/loki-docker-driver:latest \
     --alias loki \
     --grant-all-permissions
   

2. Change logger per container

   docker run \
     --log-driver=loki \
     --log-opt loki-url="LOKI_URL/loki/api/v1/push" \
     IMAGE
   

Updating Docker Loki Driver

docker plugin disable loki --force
docker plugin upgrade loki grafana/loki-docker-driver:latest --grant-all-permissions
docker plugin enable loki
synoservice --restart pkgctl-Docker