Terraform Swarm Okami

This Terraform project is intended to be used as a template for deploying an opinionated Swarm cluster. It provides :

• Ingress routing via Traefik preconfigured for cloudflare SSL DNS challenge for wildcard domain
• Complete monitoring with Prometheus, all next tools are already configured for being monitored
• Grafana for dashboards
• MySQL + PostgresSQL databases
• UI web managers, as Portainer, phpMyAdmin, pgAdmin

Prepare cluster

If using Hetzner as VPS provider, you can use it on top of Terraform Hcloud Swarm.

Ensure to have initiated swarm cluster and update nodes with following self-explanatory labels:

docker node update --label-add manager=true swarm-manager-01
docker node update --label-add proxy=true swarm-manager-01
docker node update --label-add monitoring=true swarm-manager-01
docker node update --label-add run=true swarm-worker-01
docker node update --label-add run=true swarm-worker-02
docker node update --label-add db=true swarm-storage-01

Ensure to have the following docker config /etc/docker/daemon.json on all nodes:

{
    "default-network-opts": {
        "overlay": {
            "com.docker.network.driver.mtu": "1450"
        }
    },
    "metrics-addr": "0.0.0.0:9323"
}

The com.docker.network.driver.mtu is required for avoiding MTU issues with Hetzner cloud. Use metrics-addr to obtain all Prometheus metrics from all services.