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Hazelcast

Hazelcast with clustering configuration based off the official Hazelcast Docker image. Uses
multicast to automatically form a cluster.

Environment Variables

The default parameters can be overridden by setting environment variables on the container using the docker run -e flag.

  • HZ_PORT - Port to bind to.
  • HZ_PUBLIC_HOST - Public hostname to advertise to the cluster.
  • HZ_PUBLIC_PORT - Public port to advertise to the cluster. Defaults to $HZ_PORT
  • HZ_GROUP_NAME - Group name to avoid different clusters from joining each other.
  • HZ_GROUP_PASSWORD - Password required to join the cluster.

Deployment

Deployment and clustering config examples.

Marathon

{
  "id": "/myproduct/mysubsystem/hazelcast",
  "container": {
    "type": "DOCKER",
    "docker": {
      "image": "meltwater/hazelcast:latest"
    }
  },
  "ports": [
    5701
  ],
  "env": {
    "HZ_PORT": "${PORT_5701}",
    "HZ_PUBLIC_HOST": "${HOST}",
    "HZ_GROUP_NAME": "mygroup",
    "HZ_GROUP_PASSWORD": "secret"
  },
  "instances": 3,
  "healthChecks": [
    {
      "protocol": "TCP",
      "portIndex": 0,
      "gracePeriodSeconds": 15,
      "intervalSeconds": 10,
      "timeoutSeconds": 20,
      "maxConsecutiveFailures": 3
    }
  ]
}

Puppet Hiera

Using the garethr-docker module

classes:
  - docker::run_instance

docker::run_instance:
  'hazelcast':
    image: 'meltwater/hazelcast:latest'
    net: 'host'
    env:
      - "HZ_GROUP_NAME=mygroup"
      - "HZ_GROUP_PASSWORD=secret"

Command Line

docker run --net=host \
  -e HZ_GROUP_NAME=mygroup \
  -e HZ_GROUP_PASSWORD=secret \
  meltwater/hazelcast:latest
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meltwater
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