init_config:

instances:
#  - server: localhost
#    user: my_username
#    pass: my_password
#    port: 3306             # Optional
#    sock: /path/to/sock    # Connect via Unix Socket
#    defaults_file: my.cnf  # Alternate configuration mechanism
#    dimensions:                  # Optional
#        dim1:value1
#    options:               # Optional
#        replication: 0
#        galera_cluster: 1
