tldr/pages/common/docker-swarm.md

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# docker swarm
> A container orchestration tool.
> More information: <https://docs.docker.com/engine/swarm/>.
- Initialize a swarm cluster:
`docker swarm init`
- Display the token to join a manager or a worker:
`docker swarm join-token {{worker|manager}}`
- Join a new node to the cluster:
`docker swarm join --token {{token}} {{manager_node_url:2377}}`
- Remove a worker from the swarm (run inside the worker node):
`docker swarm leave`
- Display the current CA certificate in PEM format:
`docker swarm ca`
- Rotate the current CA certificate and display the new certificate:
`docker swarm ca --rotate`
- Change the valid period for node certificates:
`docker swarm update --cert-expiry {{hours}}h{{minutes}}m{{seconds}}s`