How to perform health checks in HERE Anonymizer Self-Hosted

As HERE Anonymizer Self-Hosted application is using Apache Flink, a basic health check is performed by checking if Apache Flink has a healthy JobManager. Use the Flink REST API which to perform health checks.

Basic health check

If you have the quick start example running, send a GET request to http://localhost:8081/jobs/overview.

To perform a health check on a running cluster, replace localhost with the external IP address mapped to your jobmanager-ui.

A response of a healthy deployment contains the RUNNING keyword.

Response example:

{
    "jobs": [
        {
            "jid": "d70aac68f9b58f277bdc24948f48a811",
            "name": "HERE Anonymizer",
            "state": "RUNNING",
            "start-time": 1675071141724,
            "end-time": -1,
            "duration": 9723,
            "last-modification": 1675071143604,
            "tasks": {
                "total": 1,
                "created": 0,
                "scheduled": 0,
                "deploying": 0,
                "running": 1,
                "finished": 0,
                "canceling": 0,
                "canceled": 0,
                "failed": 0,
                "reconciling": 0,
                "initializing": 0
            }
        }
    ]
}

Advanced health check

See the Flink REST API for information on getting advanced metrics.

If you're running the quick start example, follow this link to see the memory and CPU usage of TaskManagers: http://localhost:8081/taskmanagers/metrics?get=Status.JVM.CPU.Load,Status.JVM.Memory.Heap.Used,Status.JVM.Memory.Heap.Max Response example:

[
    {
        "id": "Status.JVM.CPU.Load",
        "min": 0.0010543425734744981,
        "max": 0.0010543425734744981,
        "avg": 0.0010543425734744981,
        "sum": 0.0010543425734744981
    },
    {
        "id": "Status.JVM.Memory.Heap.Used",
        "min": 1.25612544E8,
        "max": 1.25612544E8,
        "avg": 1.25612544E8,
        "sum": 1.25612544E8
    },
    {
        "id": "Status.JVM.Memory.Heap.Max",
        "min": 5.36870912E8,
        "max": 5.36870912E8,
        "avg": 5.36870912E8,
        "sum": 5.36870912E8
    }
]