The instance is being drained. The existing connections to the instance
have time to complete, but the new ones are being refused.
Healthy
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.
Timeout
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.
Unhealthy
The instance is reachable, but does not conform to the requirements
defined by the health check.
Unknown
The health checking system is aware of the instance but its health is
not known at the moment.
Unspecified
There is no liveness health check for the instance. Only applicable for
instances in App Engine standard environment.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThis webpage provides documentation for the \u003ccode\u003eInstance.Types.Liveness.Types.LivenessState\u003c/code\u003e enum within the Google Cloud App Engine v1 API, detailing the various liveness health check statuses for Flex instances.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation is versioned, with links available for versions ranging from 1.0.0 to 2.4.0, where 2.4.0 represents the latest version.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eLivenessState\u003c/code\u003e enum defines six possible states: \u003ccode\u003eDraining\u003c/code\u003e, \u003ccode\u003eHealthy\u003c/code\u003e, \u003ccode\u003eTimeout\u003c/code\u003e, \u003ccode\u003eUnhealthy\u003c/code\u003e, \u003ccode\u003eUnknown\u003c/code\u003e, and \u003ccode\u003eUnspecified\u003c/code\u003e, each reflecting a different condition of an instance's health check.\u003c/p\u003e\n"],["\u003cp\u003eEach state is accompanied by a description that clarifies its specific meaning and implications within the context of the health checking process.\u003c/p\u003e\n"],["\u003cp\u003eThe namespace for this documentation is \u003ccode\u003eGoogle.Cloud.AppEngine.V1\u003c/code\u003e, and it's found within the \u003ccode\u003eGoogle.Cloud.AppEngine.V1.dll\u003c/code\u003e assembly.\u003c/p\u003e\n"]]],[],null,[]]
