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Created March 12, 2022 20:30
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docker-swarm.md

Docker Swarm

Install

$ sudo apt-get update
$ sudo apt-get install ca-certificates curl gnupg lsb-release
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
$ echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io

https://get.docker.com/

Info

Open protocols and ports between the hosts The following ports must be available. On some systems, these ports are open by default.

TCP port 2377 for cluster management communications TCP and UDP port 7946 for communication among nodes UDP port 4789 for overlay network traffic If you plan on creating an overlay network with encryption (--opt encrypted), you also need to ensure ip protocol 50 (ESP) traffic is allowed.

Create Swarm Cluster

manager$ docker swarm init --advertise-addr <MANAGER-IP>
worker$ docker swarm join --token <TOKEN> <MANAGER-IP>:2377

docker info

$ docker info

docker node

# muestra info de los nodos que forman parte del clúster
$ docker node ls

# muestra un listado de los contenedores ejecutándose en el cluster
$ docker node ps
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