Barebones Ruby on Kubernetes test setup. Mostly following the instructions in https://kubernetes-rails.com
Build the image:
docker build --build-arg revision=$(git rev-parse HEAD) -t appsignal/kubetest:latest .
Then run it and check that it works:
docker run -p 4567:4567 appsignal/kubetest:latest
If this works you can push the image:
docker push appsignal/kubetest:latest
And run a cluster, if kubernetes is on on your local docker instance:
kubectl apply -f k8s
Check that everything is running:
kubectl get pods
And you can now open the app on http://localhost:4567.
To delete the deployment run:
kubectl delete -f k8s
To deploy the latest version of the image:
kubectl rollout restart deployment.apps/kubetest-deployment
To prod around with bash get a pod name (kubetest-deployment-7ddc65cb8b-zcrhd, for example):
kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kubetest-deployment-7ddc65cb8b-zcrhd 1/1 Running 0 5m19s 10.1.0.6 docker-desktop <none> <none>
And run:
kubectl exec -it kubetest-deployment-7ddc65cb8b-zcrhd -- bash
To tail the logs for a pod:
kubectl logs kubetest-deployment-7ddc65cb8b-zcrhd --follow