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Yandex Application Load Balancer

Method getTargetStates

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Returns the statuses of all targets of the specified backend group in all their availability zones.

HTTP request

GET https://alb.api.cloud.yandex.net/apploadbalancer/v1/loadBalancers/{loadBalancerId}/targetStates/{backendGroupId}/{targetGroupId}

Path parameters

Parameter Description
loadBalancerId Required. ID of the application load balancer that the backend group is attributed to.
backendGroupId Required. ID of the backend group that the target group is attributed to.
targetGroupId Required. ID of the target group to get target states of.

Response

HTTP Code: 200 - OK

{
  "targetStates": [
    {
      "status": {
        "zoneStatuses": [
          {
            "zoneId": "string",
            "status": "string",
            "failedActiveHc": true
          }
        ]
      },
      "target": {
        "subnetId": "string",
        "ipAddress": "string"
      }
    }
  ]
}
Field Description
targetStates[] object

A target state resource.
targetStates[].
status		 object

Health of the target, i.e. its statuses in all availability zones.

Health of the target.
targetStates[].
status.
zoneStatuses[]		 object

Health of the target in the availability zone.
targetStates[].
status.
zoneStatuses[].
zoneId		 string

Required. ID of the availability zone.
targetStates[].
status.
zoneStatuses[].
status		 string

Status of the target in the availability zone.

Supported target statuses.

  • HEALTHY: All of the health checks specified in healthchecks or healthchecks are passed (the number depends on the healthyThreshold setting) and the target is ready to receive traffic.
  • PARTIALLY_HEALTHY: Some of the health checks specified in healthchecks or healthchecks failed (the number depends on the unhealthyThreshold setting). The target is ready to receive traffic from the load balancer nodes which, based on their health checks, consider the target healthy.
  • UNHEALTHY: All of the health checks specified in healthchecks or healthchecks failed (the number depends on the unhealthyThreshold setting) and the target is not receiving traffic.
  • DRAINING: Target is being deleted and the application load balancer is no longer sending traffic to this target.
targetStates[].
status.
zoneStatuses[].
failedActiveHc		 boolean (boolean)

Indicates whether the target has been marked UNHEALTHY due to failing active health checks, which determine target statuses as configured in healthchecks or healthchecks.

Currently the only type of health checks is active, as described above. Passive health checks, which determine the health of a target based on its responses to production requests (HTTP 5xx status codes, connection errors etc.), are not implemented yet.
targetStates[].
target		 object

Required. Target.

A target resource. For details about the concept, see documentation.
targetStates[].
target.
subnetId		 string

ID of the subnet that the target is connected to.
targetStates[].
target.
ipAddress		 string

IP address of the target.
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