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Health is an important aspect of a microservice architecture. Kong Mesh can use health status
to select endpoints for communication between dataplane proxies.
Orchestrators, such as Kubernetes, use service health status to manage container lifecycles.
Also, users want the service state to be observable through the GUI or CLI.
Kong Mesh supports several mechanisms to regulate traffic depending on the health of a service:
A passive Kong Mesh policy which configures a dataplane proxy to monitor its existing
mesh traffic in order to evaluate dataplane health. The dataplane can be configured to
respond to a widely configurable range of errors and events that it may detect in communication
with remote endpoints.
Configuration of centralized health probing of services, either directly by Kong Mesh Control Plane,
or by the underlying platform, such as Kubernetes. These can detect problems from the
Control Plane’s perspective, and propagate failures to the entire mesh. However, it is necessary
for the Control Plane to be available, unlike policies which operate independently on the
An active Kong Mesh policy which configures a dataplane proxy to send extra traffic
to other dataplane proxies in order to evaluate their health. The amount of extra traffic
for all dataplane proxies to actively probe each other grows quickly for large meshes. In some
meshes, Health Check can be useful for specific routes which are not frequently traversed,
but still need to detect failures quickly.