Portainer

Portainer is a lightweight sexy UI for visualizing your docker environment. It also happens to integrate well with Docker Swarm clusters, which makes it a great fit for our stack.

This is a "lightweight" recipe, because Portainer is so "lightweight". But it is shiny...

Ingredients

Docker swarm cluster with persistent shared storage
Traefik configured per design
DNS entry for the hostname you intend to use, pointed to your keepalived IP

Preparation

Setup data locations

Create a folder to store portainer's persistent data:

mkdir /var/data/portainer

Setup Docker Swarm

Create a docker swarm config file in docker-compose syntax (v3), something like this:

--8<-- "premix-cta.md"

version: "3"

services:
  app:
    image: portainer/portainer
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /var/data/portainer:/data
    networks:
      - traefik_public
    deploy:
      labels:
        - traefik.frontend.rule=Host:portainer.funkypenguin.co.nz
        - traefik.port=9000
      placement:
        constraints: [node.role == manager]
    command: -H unix:///var/run/docker.sock

networks:
  traefik_public:
    external: true

Serving

Launch Portainer stack

Launch the Portainer stack by running docker stack deploy portainer -c <path -to-docker-compose.yml>

Log into your new instance at https://YOUR-FQDN. You'll be prompted to set your admin user/password.

--8<-- "recipe-footer.md"

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