LibclusterDB

Automatic cluster formation/healing for Elixir applications using database heartbeat.

This is a database heartbeat strategy for libcluster. It currently supports identifying nodes based on Mongodb.

Installation

def application do
  [
    applications: [
      :libcluster_db,
      ...
    ],
  ...
  ]

def deps do
  [{:libcluster_db, github: "exosite/libcluster_db", branch: "master"}]
end

An example configuration

The configuration for libcluster_db can also be described as a spec for the clustering topologies and strategies which will be used. (Now only Mongodb heartbeat implementation.)

Mongodb

Mongodb heartbeat implementation. We support this format to get the setting values from environment variables. Like this: {:system, "MONGODB_URL", "mongodb://localhost:27017/cluster_heartbeat"}

config :libcluster,
  topologies: [
    example: [
      strategy: ClusterDB.Strategy.Mongo,
      config: [
        mongodb: [
          url: "mongodb://localhost:27017/cluster_heartbeat",
          type: :unknown,
          pool_handler: DBConnection.Poolboy,
          collection_name: "node_status"
        ],
        heartbeat: [interval: 1000, delay_tolerance: 1000],
      ],
    ]
  ]