DCA Pratical Guide:

All teoric content from -> https://github.com/Evalle/DCA/blob/master/README.md

Orchestration

• Init a swarm cluster

$ docker swarm init --advertise-addr $(hostname -i)

• Init a swarm cluster with autolock

$ docker swarm init --autolock --advertise-addr $(hostname -i)

• Get a token for manager nodes

$ docker swarm join-token manager

• Get a token for worker nodes

$ docker swarm join-token worker

• List all nodes in cluster

$ docker node ls

• Update cluster with autolock

$ docker swarm update --autolock=true

• List services

$ docker service ls

• Create a service

$ docker service create --replicas 1 --name helloworld alpine ping docker.com

• List ID, container name, docker image, node when is running, desired state, current state, last error and ports allocation

$ docker service ps helloworld

• List a full detail to a service

$ docker service inspect --pretty helloworld

• Remove a service

$ docker service rm helloworld

• Content - nginx-phpfpm.yml

version: '3'

services:
  nginx:
    image: nginx
    ports:
      - 8080:80
  php-fpm:
    image: bitnami/php-fpm
    ports:
      - 8081:80

• Deploy a stack

$ docker stack deploy --compose-file nginx-phpfpm.yml mystack

• List services running in stack

$ docker stack services mystack

• Filter a specific service in stack

$ docker stack services --filter name=mystack_nginx mystack

• Filter some services in stack

$ docker stack services --filter name=mystack_nginx --filter name=mystack_php-fpm mystack

• List ID, mode and replicas from stack

$ docker stack services --format "{{.ID}}: {{.Mode}} {{.Replicas}}" mystack

• List ID, name and replicas from stack

$ docker stack services --format "ID: {{.ID}} Name: {{.Name}} Instances: {{.Replicas}}" mystack

• Scale one service

$ docker service scale mystack_nginx=10

• Scale two services in the same command

$ docker service scale mystack_php-fpm=5 helloworld=5