There is no liveness health check for the instance. Only applicable for
instances in App Engine standard environment.
Generated from protobuf enum LIVENESS_STATE_UNSPECIFIED = 0;
UNKNOWN
Value: 1
The health checking system is aware of the instance but its health is
not known at the moment.
Generated from protobuf enum UNKNOWN = 1;
HEALTHY
Value: 2
The instance is reachable i.e. a connection to the application health
checking endpoint can be established, and conforms to the requirements
defined by the health check.
Generated from protobuf enum HEALTHY = 2;
UNHEALTHY
Value: 3
The instance is reachable, but does not conform to the requirements
defined by the health check.
Generated from protobuf enum UNHEALTHY = 3;
DRAINING
Value: 4
The instance is being drained. The existing connections to the instance
have time to complete, but the new ones are being refused.
Generated from protobuf enum DRAINING = 4;
TIMEOUT
Value: 5
The instance is unreachable i.e. a connection to the application health
checking endpoint cannot be established, or the server does not respond
within the specified timeout.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Google Cloud Appengine Admin V1 Client - Class LivenessState (2.0.4)\n\nVersion latestkeyboard_arrow_down\n\n- [2.0.4 (latest)](/php/docs/reference/cloud-appengine-admin/latest/V1.Instance.Liveness.LivenessState)\n- [2.0.3](/php/docs/reference/cloud-appengine-admin/2.0.3/V1.Instance.Liveness.LivenessState)\n- [1.3.5](/php/docs/reference/cloud-appengine-admin/1.3.5/V1.Instance.Liveness.LivenessState)\n- [1.2.2](/php/docs/reference/cloud-appengine-admin/1.2.2/V1.Instance.Liveness.LivenessState)\n- [1.1.1](/php/docs/reference/cloud-appengine-admin/1.1.1/V1.Instance.Liveness.LivenessState)\n- [1.0.6](/php/docs/reference/cloud-appengine-admin/1.0.6/V1.Instance.Liveness.LivenessState) \nReference documentation and code samples for the Google Cloud Appengine Admin V1 Client class LivenessState.\n\nLiveness health check status for Flex instances.\n\nProtobuf type `google.appengine.v1.Instance.Liveness.LivenessState`\n\nNamespace\n---------\n\nGoogle \\\\ Cloud \\\\ AppEngine \\\\ V1 \\\\ Instance \\\\ Liveness\n\nMethods\n-------\n\n### static::name\n\n### static::value\n\nConstants\n---------\n\n### LIVENESS_STATE_UNSPECIFIED\n\n Value: 0\n\nThere is no liveness health check for the instance. Only applicable for\ninstances in App Engine standard environment.\n\nGenerated from protobuf enum `LIVENESS_STATE_UNSPECIFIED = 0;`\n\n### UNKNOWN\n\n Value: 1\n\nThe health checking system is aware of the instance but its health is\nnot known at the moment.\n\nGenerated from protobuf enum `UNKNOWN = 1;`\n\n### HEALTHY\n\n Value: 2\n\nThe instance is reachable i.e. a connection to the application health\nchecking endpoint can be established, and conforms to the requirements\ndefined by the health check.\n\nGenerated from protobuf enum `HEALTHY = 2;`\n\n### UNHEALTHY\n\n Value: 3\n\nThe instance is reachable, but does not conform to the requirements\ndefined by the health check.\n\nGenerated from protobuf enum `UNHEALTHY = 3;`\n\n### DRAINING\n\n Value: 4\n\nThe instance is being drained. The existing connections to the instance\nhave time to complete, but the new ones are being refused.\n\nGenerated from protobuf enum `DRAINING = 4;`\n\n### TIMEOUT\n\n Value: 5\n\nThe instance is unreachable i.e. a connection to the application health\nchecking endpoint cannot be established, or the server does not respond\nwithin the specified timeout.\n\nGenerated from protobuf enum `TIMEOUT = 5;`"]]