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Swarm provider

About

The Swarm provider is closely linked to the Docker provider except that it allows you to analyze the services of your Swarm cluster defined in the Diun configuration to extract the images found and check for updates on the registry.

Quick start

In this section we quickly go over a basic stack using your local swarm cluster.

First of all, let's create a Diun configuration we named diun.yml:

watch:
  workers: 20
  schedule: "*/30 * * * *"

providers:
  swarm:
    myswarm:

Here we use a single Swarm provider with a minimum configuration to analyze labeled containers (watch by default disabled), of your local Swarm cluster.

Now let's create a simple stack for Diun:

version: "3.5"

services:
  diun:
    image: crazymax/diun:latest
    volumes:
      - "./data:/data"
      - "./diun.yml:/diun.yml:ro"
      - "/var/run/docker.sock:/var/run/docker.sock"
    environment:
      - "TZ=Europe/Paris"
      - "LOG_LEVEL=info"
      - "LOG_JSON=false"
    deploy:
      placement:
        constraints:
          - node.role == manager

And another one with a simple service:

version: "3.5"

services:
  nginx:
    image: nginx
    ports:
      - target: 80
        published: 80
        protocol: udp
    deploy:
      mode: replicated
      replicas: 2
      labels:
        - "diun.enable=true"
        - "diun.watch_repo=true"

As an example we use nginx Docker image. A few labels are added to configure the image analysis of this service for Diun. We can now start these 2 stacks:

docker stack deploy -c diun.yml diun
docker stack deploy -c nginx.yml nginx

And watch logs of Diun service:

$ docker service logs -f diun_diun
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:19:57 CET INF Starting Diun dev
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:19:57 CET INF Starting Diun...
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:19:57 CET INF Found 1 swarm provider(s) to analyze...
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:19:59 CET INF New image found id=myswarm image=docker.io/library/nginx:latest provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:01 CET INF New image found id=myswarm image=docker.io/library/nginx:1.9 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:01 CET INF New image found id=myswarm image=docker.io/library/nginx:1.9.4 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:01 CET INF New image found id=myswarm image=docker.io/library/nginx:1.9.8 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:01 CET INF New image found id=myswarm image=docker.io/library/nginx:1.9.7 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:01 CET INF New image found id=myswarm image=docker.io/library/nginx:1.9.9 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:01 CET INF New image found id=myswarm image=docker.io/library/nginx:1.9.6 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:01 CET INF New image found id=myswarm image=docker.io/library/nginx:1.9.5 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:mainline-alpine provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:alpine-perl provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:stable-perl provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:stable-alpine-perl provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:1 provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:perl provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:mainline-alpine-perl provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:stable provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:mainline-perl provider=swarm
diun_diun.1.i1l4yuiafq6y@docker-desktop    | Sat, 14 Dec 2019 16:20:02 CET INF New image found id=myswarm image=docker.io/library/nginx:mainline provider=swarm
...

Configuration

You can configure more finely the way to analyze the image of your service as for the Docker provider with Docker labels.