Adding nodes to an existing cluster

  1. In the existing cluster profile, add host lines to specify the additional node(s).

    EXAMPLE: You have this existing cluster profile, ~/.continuum/adam/profile.d/profile.yaml:

    name: profile
    provider: bare
    
    bare:
      username: centos
      # password: password  # Optional
      port: 22
      keypair: ~/.ssh/my-private-key
      nodes:
      - host: node1.company.com
      - host: node2.company.com
      - host: node3.company.com
      - host: node4.company.com
    

    You want to add the following nodes:

    • node10.company.com
    • node11.company.com
    • node12.company.com

    Assuming these nodes use the same authentication mode as the existing nodes, add a host line for each node:

    name: profile
    provider: bare
    
    bare:
      username: centos
      # password: password  # Optional
      port: 22
      keypair: ~/.ssh/my-private-key
      nodes:
      - host: node1.company.com
      - host: node2.company.com
      - host: node3.company.com
      - host: node4.company.com
      - host: node10.company.com
      - host: node11.company.com
      - host: node12.company.com
    
  2. Run the adam up command to provision the cluster.

    EXAMPLE: To use the profile named “profile” to provision the cluster named “cluster”, run:

    $ adam up -n cluster profile
    

    You are prompted to overwrite the cluster definition file located at ~/.continuum/adam/cluster.d/cluster.yaml to include the newly defined nodes.

    During the provisioning process, Adam will install on the new nodes and will not reinstall on the previously defined nodes.