k8s-gcp-geo-distribution

Routing traffic based on user geo-location using Kubernetes(K8s) and Google Cloud Platform(GCP) infrastructure.

APP has 2 different versions (determined by env var APP_COUNTRY) Override by K8s(spec.containers.env):

• US
• UAE

Each version placed on a K8s deployment<->service.

Diagram:

K8s resources:

NAME                              READY   STATUS    RESTARTS   AGE
pod/deploy-uae-5979b498c4-267r4   1/1     Running   0          9s
pod/deploy-uae-5979b498c4-r986l   1/1     Running   0          9s
pod/deploy-us-77db5f8549-mrtpc    1/1     Running   0          9s
pod/deploy-us-77db5f8549-xv57c    1/1     Running   0          9s

NAME              TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
service/srv-uae   LoadBalancer   10.108.10.19     <pending>     80:30730/TCP   9s
service/srv-us    LoadBalancer   10.105.232.173   <pending>     80:31591/TCP   9s

NAME                         READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/deploy-uae   2/2     2            2           9s
deployment.apps/deploy-us    2/2     2            2           9s

NAME                                    DESIRED   CURRENT   READY   AGE
replicaset.apps/deploy-uae-5979b498c4   2         2         2       9s
replicaset.apps/deploy-us-77db5f8549    2         2         2       9s

NAME                                CLASS   HOSTS                 ADDRESS   PORTS   AGE
ingress.networking.k8s.io/ing-geo   nginx   k8s-ingress-url.com             80      9s

Routing:

• 1st method: (costly solution)
  • Used GCP function and node package geoip-lite(based on maxmind) for locating the user ip country and routing the traffic to k8s ingress paths /us or /uae.
    • GCP function 2nd-gen has more Runtime, build, connections and security settings such as Concurrency(Maximum concurrent requests per instance).
  • Improvements:
    • Replace GCP function with lower price solution
    • DB update mechanism, Caching maxmind calls, ..
    • ...
• Other methods: investigating ingress-nginx custom annotation and other solutions