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# platform-toolboxs
Slackbot
05/23/2023, 1:25 AMThis message was deleted.
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Aakash Singhal
05/29/2023, 1:19 PMCan you please elaborate the use case and also the reason to eliminate ELB.
One vague solution that I can think at the top of my head is to create two EKS cluster and do a VPC peering. Expose ingress controller of tier-2 service as node port service on private IP of the machine.
Aakash Singhal
05/29/2023, 1:26 PMTo achieve sometime like what taterate is trying to implement:
1. Expose both clusters ingress service as nodePort service.
2. Create one application load balancer(will be used by both the clusters).
3. Create target group for both the clusters,
4. Use AWS load balancer controller to create target group binding object and add nodes in the relavent cluster.
5. Attach the target groups(for both cluster) to your load balancers listener.
6. Since you're using an application load balancer, based on host header you can either route the traffic to tier1 cluster or tier2 cluster.
@Anshul Garg Hope this helps.
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Anshul Garg
05/30/2023, 12:20 AM@Aakash Singhal thanks for response but we are trying to expose of tier1 eks cluster via ALB and tier2 cluster should get connected via tier1. A common ALB shdnt be shared in between both the clusters
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Aakash Singhal
05/30/2023, 5:45 AMso will tier2 cluster we exposed via some ingress(not load balancer) or you want all the services in tier2 cluster be reachable from tier1 cluster on cluterIP(or service name)?
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Anshul Garg
05/31/2023, 12:34 AMActually we want all the services in tier2 cluster should be reachable from tier1 cluster via service name. We don't want LoadBalancer between tier1 & tier2
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Aakash Singhal
05/31/2023, 9:52 AMI haven’t used it but I guess, vpc peering and istio should be able to do this. Let me see if I can find a good blog for this.
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Anshul Garg
06/03/2023, 11:00 AMI think this should be possible using Multi-Primary approach
So, Istio Operator configurations in both the tier1 & tier2 cluster should have common "meshID" and "network"
Something as explained in https://istio.io/latest/docs/setup/install/multicluster/multi-primary/
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