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Docker Swarm

About docker swarm​

  • Cluster management integrated with Docker Engine
  • Decentralized design
  • Declarative service model
  • Scaling
  • Desired state reconciliation
  • Multi-host networking
  • Service discovery
  • Load balancing
  • Secure by default
  • Rolling updates

Prerequisite​

  • Docker Engine installed
  • Port enable for comunicate each node
    • TCP: 2376
    • TCP: 2377
    • TCP/UDP: 7946
    • UDP: 4789

Command reference​

  • docker swarm init for Initialize a swarm mode

    command: docker swarm init [OPTIONS]

    options:

    • --advertise-addr : Advertised address (format: <ip|interface>[:port])

    • --autolock : Enable manager autolocking (requiring an unlock key to start a stopped manager)

    • --availability : Availability of the node (“active”|”pause”|”drain”)

    • --cert-expiry : Validity period for node certificates (ns|us|ms|s|m|h)

    • --data-path-addr : Address or interface to use for data path traffic (format: <ip|interface>)

    • --data-path-port : Port number to use for data path traffic (1024 - 49151). If no value is set or is set to 0, the default port (4789) is used.

    • --default-addr-pool : default address pool in CIDR format

    • --default-addr-pool-mask-length : default address pool subnet mask length

    • --dispatcher-heartbeat : Dispatcher heartbeat period (ns|us|ms|s|m|h)

    • --external-ca : Specifications of one or more certificate signing endpoints

    • --force-new-cluster : Force create a new cluster from current state

    • --listen-addr : Listen address (format: <ip|interface>[:port])

    • --max-snapshots : Number of additional Raft snapshots to retain

    • --snapshot-interval : Number of log entries between Raft snapshots

    • --task-history-limit : Task history retention limit

      reference : https://docs.docker.com/engine/reference/commandline/swarm_init

  • docker swarm join for join a swarm as a node and/or manager

    command: docker swarm join [OPTIONS] HOST:PORT

    options:

    • --advertise-addr : Advertised address (format: <ip|interface>[:port])

    • --availability : Availability of the node (“active”|”pause”|”drain”)

    • --data-path-addr : Address or interface to use for data path traffic (format: <ip|interface>)

    • --listen-addr : Listen address (format: <ip|interface>[:port])

    • --token : Token for entry into the swarm

      reference: https://docs.docker.com/engine/reference/commandline/swarm_join/

There are still have more reference to this snippets

  • docker stack
  • docker service