Munin v3 (master)

Munin v3 is currently in beta stage, use at your own risk. The protcol is compatible to Munin v1 and Munin v2 nodes, so you don't have to update them.

Munin v3 contains a built-in minimal webserver that generates graphs on-demand so it should use less resources than Munin v2 nodes with the default graph_strategy (cron).

You can either use it behind a reverse proxy (e.g. nginx) so you can have other virtual hosts on the server or expose it directly to the internet.

Volumes

• /var/lib/munin used to store the collected data
• /var/log/munin used to store logs
• /usr/local/etc/munin/munin-conf.d to add your own configuration

Ports

• 4948 - Munin HTTP server

Usage examples

Create a directory to store your data and configuration files:

mkdir -p /var/volumes/munin/lib
mkdir -p /var/volumes/munin/conf

Make sure the lib directory is writable for munin (uid 1000).

Create a configuration file for munin, e.g (/var/volumes/munin/conf/hosts.conf):

[bauerj.eu;moonraker.bauerj.eu]
    address moonraker.bauerj.eu
    port 4949

Directly connected to the internet

If you use docker-compose:

  munin:
    image: bauerj/munin-v3:0.3b4
    ports:
      - "80:4948"
    volumes:
      - /var/volumes/munin/lib:/var/lib/munin
      - /var/volumes/munin/conf:/usr/local/etc/munin/munin-conf.d

Or using docker run:

docker run --name munin -v '/var/volumes/munin/lib:/var/lib/munin' -v '/var/volumes/munin/conf:/usr/local/etc/munin/munin-conf.d' -p '80:4948' bauerj/munin-v3:0.3b3

With a reverse proxy

In most cases, you want to use a reverse proxy to connect to munin. If you want to use nginx, you can use something like this:

server {
    server_name munin.bauerj.eu;
    location / {
        proxy_pass http://munin:4948;
    }
}

If nginx is running inside a docker container, make sure to link munin to your nginx container.

Demo

You can find a live demo of the current development version of munin here.