CODEWITHSUNDEEP
dockerkubernetesgoogle-kubernetes-enginekubernetes-ingress
user2501711
user2501711

Reputation: 577

K8s loadbalance between different deployment/replicasets

we have a system that is having 2 endpoint based on geo-location. e.g (east_url, west_url). One of our application need to load balance between those 2 urls. In the consumer application, created 2 deployment with the same image but different environment variables such as "url=east_url", "url=west_url".

after the deployment, i have following running pod, each of them will have label: "app=consumer-app" and "region=east" or "region=west"

when i create a clusterIP service with selector: app=consumer-app, somehow it only picks up one replicaSet. I am just curious if this is actually possible in kubernates to allow Service backed up by different deployments?

Another way of doing this i can think of is to create 2 services, and have ingress controller to loadbalance it, is this possible? we are using Kong as the ingress controller. I am looking for something like openshift which can have "alternativeBackends" to serve the Route. https://docs.openshift.com/container-platform/4.1/applications/deployments/route-based-deployment-strategies.html

Upvotes: 0

Views: 102

Answers (2)

Armando Cuevas
Armando Cuevas

Reputation: 889

TL;DR: use ISTIO

With ISTIO you can create Virtual Services:

A VirtualService defines a set of traffic routing rules to apply when a host is addressed. Each routing rule defines matching criteria for traffic of a specific protocol. If the traffic is matched, then it is sent to a named destination service (or subset/version of it) defined in the registry.

The VirtualService will let you send traffic to different backends based on the URI.

Now, if you plan to perform like an A/B TEST, you can use ISTIO's (Destination Rule):[https://istio.io/docs/reference/config/networking/destination-rule/].

DestinationRule defines policies that apply to traffic intended for a service after routing has occurred.

Version specific policies can be specified by defining a named subset and overriding the settings specified at the service level

1.- If you are using GKE, the process to install ISTIO can be located in here

2.- If you are using K8s running on a Virtual Machine, the installation process can be found here

Upvotes: 0

user2501711
user2501711

Reputation: 577

I was missing a label for the east replicaSets, after i add the app:consumerAPP, it works fine now. Thanks

Upvotes: 1

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