Locality-aware Load Balancing
New to Kuma? You don’t need this, Check the MeshLoadBalancingStrategy
policy instead.
In a multi-zone deployment , locality-aware load balancing instructs data plane proxies to try to keep requests within one zone. The amount of traffic that remains in one zone depends on the health of the service endpoints in that zone.
By way of example, consider a request from a service in Kuma zone east
to another
service backend
. If all of the endpoints for backend
in zone east
are healthy,
the request will be sent to one of those endpoints rather than to another zone.
As more backend
endpoints in zone east
become unhealthy, some traffic begins to flow
to backend
instances in other zones.
Locality-aware load balancing is currently implemented using Envoy priorites, see
the Envoy documentation
for more details.
Enabling locality-aware load balancing
Locality-aware load balancing is configured at the Mesh
level.
It can be enabled as follows:
apiVersion: kuma.io/v1alpha1
kind: Mesh
metadata:
name: default
spec:
routing:
localityAwareLoadBalancing: true
The configuration can be applied with kubectl apply -f [..]
.