Health Check API

This feature is in development and as such will continue to change. Please check the documentation and release notes for updates.

The overall health of a LogScale system is determined by a set of individual health checks. For more information about our health checks references for the individual checks see the Health Checks page.

Status API

This is a publicly available endpoint meant for external monitoring systems and load balancers. It returns a status value (OK, WARN, or DOWN) and the current version of the LogScale node. The version can be handy when automating deployments to check that the new version is actually running. The version is also available for humans in the UI, at the bottom on the front page.

http
GET /api/v1/status

The endpoint will return HTTP status code 200 if LogScale is running, and code 503 service unavailable when the status is DOWN.

The response contains JSON like this: 

{
   "status": status,
   "version": version-string
}

Example

shell
$ curl 'http://humio-host:8080/api/v1/status'
{"status":"OK","version":"1.9.0--build-3034--sha-34fd501fe"}

Health API

This endpoint is targeted for manual use with cURL or similar command line tools, and can be used to quickly obtain information on the overall health of the system and the individual checks. Only root users can access the endpoint.

http
GET /api/v1/health

Returns HTTP status code "200 OK" when the health state is either OK or WARN and "503 service unavailable" when one or more health checks are in DOWN state.

Example

shell
$ curl -u user:user-token https://humio-host:8080/api/v1/health
OK - everything is working
  Uptime: 5m58s (358s)
  Humio version: 1.9.0--build-3034--sha-34fd501fe
  Health Check Documentation: https://docs.humio.com/cluster-management/health-checks

Individual checks (DOWN=0 WARN=0 OK=5):
  backup-disk-usage [OK]: used=61.17% total=234792128512b free=91180826624b path=/mnt/backup/humio
  event-latency-p99 [OK]: p99=10.268s min=0.004s p50=0.939s p95=5.896s max=10.364s size=103
  not-alive-count [OK]: not-alive=0 number-of-nodes=1
  primary-disk-usage [OK]: used=61.17% total=234792128512b free=91180826624b path=/var/local/humio
  secondary-disk-usage [OK - not enabled]:

Health API (JSON)

This API provides the same information as the Health API, but as JSON data. This is meant for machine use, scripting, or automation.

http
GET /api/v1/health-json

The JSON output is loosely defined as follows:

json
status := {"status": status,
          "statusMessage": "some status description,
          "uptime": "5m58s (358s)",
          "version": "1.9.0--build-3034--sha-34fd501fe",
          "oks": [check, ...],
          "warnings": [check, ...],
          "downs": [check, ...]
         }

check := {"name": "some name",
         "status": status,
         "statusMessage": "some status description",
         "fields": {"field": "value", ...}
        }
status := "OK" | "WARN" | "ERROR"

Example

Here's an example:

shell
$ curl -u user:user-token https://humio-host:8080/api/v1/health-json

Returns:

json
{
  "downs": [],
  "oks": [
    {
      "fields": {
        "free": "90692845568b",
        "path": "/mnt/backup/humio",
        "total": "234792128512b",
        "used": "61.37%"
      },
      "name": "backup-disk-usage",
      "status": "OK",
      "statusMessage": ""
    },
    {
      "fields": {
        "max": "0.167s",
        "min": "0.001s",
        "p50": "0.075s",
        "p95": "0.126s",
        "p99": "0.153s",
        "size": "1341"
      },
      "name": "event-latency-p99",
      "status": "OK",
      "statusMessage": ""
    },
    {
      "fields": {
        "not-alive": "0",
        "number-of-nodes": "1"
      },
      "name": "not-alive-count",
      "status": "OK",
      "statusMessage": ""
    },
    {
      "fields": {
        "free": "90692845568b",
        "path": "/var/local/humio",
        "total": "234792128512b",
        "used": "61.37%"
      },
      "name": "primary-disk-usage",
      "status": "OK",
      "statusMessage": ""
    },
    {
      "fields": {},
      "name": "secondary-disk-usage",
      "status": "OK",
      "statusMessage": "not enabled"
    }
  ],
  "status": "OK",
  "statusMessage": "everything is working",
  "uptime": "4m19s (259s)",
  "version": "0.0.0-DEV",
  "warnings": []
}