Connecting to Kubernetes cluster on AWS internal network
I have two Kubernetes clusters in AWS, each in it's own VPC.
- Cluster1 in VPC1
- Cluster2 in VPC2
I want to do http(s) requests from cluster1 into cluster2 through a VPC peering. The VPC peering is setup and I can ping hosts from Cluster1 to hosts in Cluster2 currently.
How can I create a service that I can connect to from Cluster1 in Cluster2. I have experience setting up services using external ELBs and the like, but not for traffic internally in this above scenario.
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2 Answers
You can create internal LoadBalancer.
All you need to do is to create a regular service of type LoadBalancer and annotate it with the following annotation:
service.beta.kubernetes.io/aws-load-balancer-internal: "true"Use an internal loadbalancer.
apiVersion: v1
kind: Service
metadata:
name: cluster2-service
namespace: test
annotations:
service.beta.kubernetes.io/aws-load-balancer-internal: "true"That will instruct the CNI to allocate the elb on a private subnet, which should make services behind it in the cluster reachable from the other vpc.