DCAE Health Check

OOM Deployment

In OOM deployments, DCAE healthchecks are performed by a separate service–dcae-healthcheck. This service is packaged into a Docker image (onap/org.onap.dcaegen2.deployments.healthcheck-container), which is built in the healthcheck-container module in the dcaegen2/deployments repository.

The service is deployed with a Helm chart (oom/kubernetes/dcaegen2/charts/dcae-healthcheck) when DCAE is deployed using OOM.

The dcae-healthcheck container runs a service that exposes a simple Web API. In response to request, the service checks Kubernetes to verify that all of the expected DCAE platform and service components are in a ready state. The service has a fixed list of platform and service components that are normally deployed when DCAE is first installed, including components deployed with Helm charts and components deployed using Cloudify blueprints. In addition, beginning with the Dublin release, the healthcheck service tracks and checks components that are deployed dynamically using Cloudify blueprints after the initial DCAE installation.

The healthcheck service is exposed as a Kubernetes ClusterIP Service named dcae-healthcheck. The service can be queried for status as shown below.

$ curl dcae-healthcheck
{
  "type": "summary",
  "count": 14,
  "ready": 14,
  "items": [
     {
       "name": "dev-dcaegen2-dcae-cloudify-manager",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dev-dcaegen2-dcae-config-binding-service",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dev-dcaegen2-dcae-inventory-api",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dev-dcaegen2-dcae-servicechange-handler",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dev-dcaegen2-dcae-deployment-handler",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dev-dcaegen2-dcae-policy-handler",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-dcae-ves-collector",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-dcae-tca-analytics",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-dcae-prh",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-dcae-hv-ves-collector",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-dcae-dashboard",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-dcae-snmptrap-collector",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-holmes-engine-mgmt",
       "ready": 1,
       "unavailable": 0
     },
     {
       "name": "dep-holmes-rule-mgmt",
       "ready": 1,
       "unavailable": 0
     }
   ]
 }