Setup Docker Swarm test environment using Multipass - dcm4che/dcm4chee-arc-light GitHub Wiki

Multipass is a tool to generate cloud-style Ubuntu VMs on Linux, macOS, and Windows.

  1. Install Multipass

    Multipass’s installation method differs based on one's platforms

  2. Prepare a Cloud-init YAML file docker-cloud-config.yaml:

    #cloud-config
    
    apt:
      sources:
        docker.list:
          source: deb [arch=amd64] https://download.docker.com/linux/ubuntu $RELEASE stable
          keyid: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
    
    packages:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg-agent
      - software-properties-common
      - docker-ce
      - docker-ce-cli
      - containerd.io
    
    # Enable ipv4 forwarding, required on CIS hardened machines
    write_files:
      - path: /etc/sysctl.d/enabled_ipv4_forwarding.conf
        content: |
          net.ipv4.conf.all.forwarding=1
    
    # create the docker group
    groups:
      - docker
    
    # Add default auto created user to docker group
    system_info:
      default_user:
        groups: [docker]

    to facilitate installation of Docker Engine on launching a new VM.

    On Linux, docker-cloud-config.yaml have to be located in the user's home directory to be accessible by the Multipass Snap application.

  3. Create and start a new VM with installed Docker Engine for each node (e.g.):

    $ multipass launch -n arc-node -d 10G -m 4G --cloud-init docker-cloud-config.yaml
    Launched: arc-node
    $ multipass launch -n db-node -d 10G -m 4G --cloud-init docker-cloud-config.yaml
    Launched: db-node
    $ multipass launch -n elk-node -d 10G -m 4G --cloud-init docker-cloud-config.yaml
    Launched: elk-node

    with

    • -d 10G - allocating 10 GB diskspace for the created VM (default: 5G)
    • -m 4G - allocating 4 GB of memory for the created VM (default: 1G)

    See

    $ multipass launch -h
    Usage: multipass launch [options] [[<remote:>]<image> | <url>]
    Create and start a new instance.
    
    Options:
      -h, --help                            Displays help on commandline options
      -v, --verbose                         Increase logging verbosity. Repeat the
                                            'v' in the short option for more detail.
                                            Maximum verbosity is obtained with 4 (or
                                            more) v's, i.e. -vvvv.
      -c, --cpus <cpus>                     Number of CPUs to allocate.
                                            Minimum: 1, default: 1.
      -d, --disk <disk>                     Disk space to allocate. Positive
                                            integers, in bytes, or with K, M, G
                                            suffix.
                                            Minimum: 512M, default: 5G.
      -m, --mem <mem>                       Amount of memory to allocate. Positive
                                            integers, in bytes, or with K, M, G
                                            suffix.
                                            Minimum: 128M, default: 1G.
      -n, --name <name>                     Name for the instance. If it is
                                            'primary' (the configured primary
                                            instance name), the user's home
                                            directory is mounted inside the newly
                                            launched instance, in 'Home'.
      --cloud-init <file> | <url>           Path or URL to a user-data cloud-init
                                            configuration, or '-' for stdin
      --network <spec>                      Add a network interface to the
                                            instance, where <spec> is in the
                                            "key=value,key=value" format, with the
                                            following keys available:
                                             name: the network to connect to
                                            (required), use the networks command for
                                            a list of possible values, or use
                                            'bridged' to use the interface
                                            configured via `multipass set
                                            local.bridged-network`.
                                             mode: auto|manual (default: auto)
                                             mac: hardware address (default:
                                            random).
                                            You can also use a shortcut of "<name>"
                                            to mean "name=<name>".
      --bridged                             Adds one `--network bridged` network.
      --mount <local-path>:<instance-path>  Mount a local directory inside the
                                            instance. If <instance-path> is omitted,
                                            the mount point will be the same as the
                                            absolute path of <local-path>
      --timeout <timeout>                   Maximum time, in seconds, to wait for
                                            the command to complete. Note that some
                                            background operations may continue
                                            beyond that. By default, instance
                                            startup and initialization is limited to
                                            5 minutes each.
    
    Arguments:
      image                                 Optional image to launch. If omitted,
                                            then the default Ubuntu LTS will be
                                            used.
                                            <remote> can be either ‘release’ or
                                            ‘daily‘. If <remote> is omitted,
                                            ‘release’ will be used.
                                            <image> can be a partial image hash or
                                            an Ubuntu release version, codename or
                                            alias.
                                            <url> is a custom image URL that is in
                                            http://, https://, or file:// format.

    for all available options.

  4. List created instances and add entries in your DNS or hosts file:

    $ multipass list
    Name                    State             IPv4             Image
    arc-node                Running           10.109.53.4      Ubuntu 20.04 LTS
                                              172.19.0.1
                                              172.17.0.1
    db-node                 Running           10.109.53.75     Ubuntu 20.04 LTS
                                              172.17.0.1
                                              172.19.0.1
    elk-node                Running           10.109.53.139    Ubuntu 20.04 LTS
                                              172.19.0.1
                                              172.17.0.1
    $ sudo -i
    # cat >> /etc/hosts << EOF
    10.109.53.4   arc-node
    10.109.53.75  db-node
    10.109.53.139 elk-node
    EOF
    # exit
    logout
  5. Transfer node specific configuration scripts (e.g. init-arc-node.sh, init-db-node.sh, init-elk-node.sh, docker-compose.yml, to the new created VMs (e.g.):

    $ multipass transfer init-arc-node.sh docker-compose.yml docker-compose.env arc-node:
    $ multipass transfer init-db-node.sh db-node:
    $ multipass transfer init-elk-node.sh elk-node:
  6. Open a shell prompt on each instance and run the node specific initialization script as root:

    $ multipass shell arc-node
       Welcome to Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-124-generic x86_64)
    ...
    ubuntu@arc-node$ sudo bash -v ~ubuntu/init-arc-node.sh 
    ...
    $ multipass shell db-node
       Welcome to Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-124-generic x86_64)
    ...
    ubuntu@db-node$ sudo bash -v ~ubuntu/init-db-node.sh 
    ...
    $ multipass shell elk-node
       Welcome to Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-124-generic x86_64)
    ...
    ubuntu@elk-node$ sudo bash -v ~ubuntu/init-elk-node.sh 
    ...
  7. Initialize a Docker Swarm in the shell prompt of the node acting as swarm manager:

    ubuntu@arc-node:~$ docker swarm init
    Swarm initialized: current node (reney80x2dbg82aqh5b5130zc) is now a manager.
    
    To add a worker to this swarm, run the following command:
    
        docker swarm join --token SWMTKN-1-4rceln8o0wwcmoqjv67wg17svij7mzj3kkyhrnbk4f1tejz8eu-3lxvhgmmzv1gbmmvpkir4wz9m 10.109.53.4:2377
    
    To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

    and add other nodes as worker to the swarm by invoking above command in their shell prompts:

    ubuntu@db-node:~$ docker swarm join --token SWMTKN-1-4rceln8o0wwcmoqjv67wg17svij7mzj3kkyhrnbk4f1tejz8eu-3lxvhgmmzv1gbmmvpkir4wz9m 10.109.53.4:2377
    This node joined a swarm as a worker.
    ubuntu@elk-node:~$ docker swarm join --token SWMTKN-1-4rceln8o0wwcmoqjv67wg17svij7mzj3kkyhrnbk4f1tejz8eu-3lxvhgmmzv1gbmmvpkir4wz9m 10.109.53.4:2377
    This node joined a swarm as a worker.
  8. Now you are ready to create services individually or deploy stacks of services at the node acting as swarm manager (e.g):

    ubuntu@arc-node:~$ docker stack deploy -c docker-compose.yml dcm4che
    Creating network dcm4che_default
    Creating service dcm4che_arc
    Creating service dcm4che_elasticsearch
    Creating service dcm4che_kibana
    Creating service dcm4che_logstash
    Creating service dcm4che_ldap
    Creating service dcm4che_keycloak
    Creating service dcm4che_oauth2-proxy
    Creating service dcm4che_db
  9. You may stop and restart created VMs by (e.g.)

    $ multipass stop arc-node db-node elk-node
    $ multipass start arc-node db-node elk-node
  10. You may delete and finally purge created VMs by (e.g.)

    $ multipass delete -p arc-node db-node elk-node
⚠️ **GitHub.com Fallback** ⚠️