Docker-swarm

install

• apt update
• apt upgrade
• curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
• add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
• apt update
• apt-get install -y docker-ce docker-compose
• systemctl start docker
• systemctl enable docker

change host file

/etc/hosts

10.50.66.21 node01
10.50.66.22 node02 
10.50.66.23 node03

create swarm

node01

swarm init

node01

• docker swarm init --advertise-addr 10.50.66.21

node02

• docker swarm join --token XXXXXXXXXX 10.50.66.21:2377

node01

• docker node promote node02

node03

• docker swarm join --token XXXXXXXXXX

docker stack

• vi docker-compose.yml

version: "3.5"
services:
  web:
    image: containous/whoami
    ports:
      - "80:80"
    #    networks:
    #      - ext
    deploy:
      mode: replicated # replicate container on other swarm nodes
      replicas: 3 #number of replicas
      labels:
        - traefik.enable=true
        - traefik.port=80
        #- traefik.frontend.rule=Host:whoami.bis.info
        #- traefik.frontend.rule=Host:whoami.d-1ropa.com
        - traefik.frontend.rule=Host:whoami.98mti.de
        - traefik.frontend.passHostHeader=true
        #- traefik.frontend.rule=Host:whoami.clriser.net
        - traefik.protocol=http

• docker stack deploy -c docker-stack.yml $(basename $PWD)

• docker service ls

ID                  NAME                MODE                REPLICAS            IMAGE                      PORTS
wz126t6z1puo        whoami_web          replicated          3/3                 containous/whoami:latest   *:80->80/tcp

• docker stack example

links

• https://linuxconfig.org/how-to-configure-docker-swarm-with-multiple-docker-nodes-on-ubuntu-18-04
• https://clouding.io/kb/en-us/articles/360010288160-Docker-Swarm-on-Ubuntu-18-04
• https://geek-cookbook.funkypenguin.co.nz/recipes/nextcloud/