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This is the schema definition for a valid yaml file. For AWS, this file is passed in through user-data.

portworx:
  config:
    clusterid: "unique_cluster_id"
    mgtiface: "enp5s0f0"
    dataiface: "enp5s0f1"
    kvdb:
    - etcd:http://etcd0.yourdomain.com:4001
    - etcd:http://etcd1.yourdomain.com:4001
    loggingurl: ""
    alertingurl: ""
    storage:
      devices:
      - vol-0743df7bf5657dad8
      - vol-0055e5913b79fb49d

Definitions

clusterid: Globally unique cluster ID. Ex: ""07ea5dc0-4e9a-11e6-b2fd-0242ac110003"". Must be either assigned by PX-Enterprise or guaranteed to be unique

mgtiface: Host ethernet interface used for Management traffic connecting to the 'loggingurl' endpoint. Primarily used for statistics, configuration and control-path. Ex: "enp5s0f0"

dataiface: Host ethernet interface used for backend activity, such as replication and resync. Ex: "enp5s0f1"

loggingurl: Endpoint used communicating to PX-Enterpise control (aka "Lighthouse"). Primary use is system statistics. Ex: "http://lighthouse.portworx.com/api/stats/listen"

kvdb: Array of endpoints used for the key-value database. Must be reachable and refer to 'etcd' or 'consul'.

 Ex:  
    kvdb: 
    - etcd:http://etcd0.yourdomain.com:4001
    - etcd:http://etcd1.yourdomain.com:4001

For 'consul', an example would be:

Ex:
    kvdb:
        consul:http://consul.yourdomain.com:8500

storage: Array of devices to be used as part of the PX Storage Fabric. This can be either volume-ids for cloud providers or path to attached devices.

Ex:
    storage:
      devices:
      - vol-0743df7bf5657dad8
      - vol-0055e5913b79fb49d

Or for attached devices:

Ex:
    storage:
      devices:
      - /dev/xvdg
      - /dev/xvdh