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Wait for service to be ready

https://vadosware.io/post/so-you-need-to-wait-for-some-kubernetes-resources/ https://stackoverflow.com/questions/51079849/kubernetes-wait-for-other-pod-to-be-ready

Start example cluster:

minikube start --driver=kvm2

Deploy demo app:

kubectl apply -f deploy.yaml

Wait for client pod gets to completed state and see the logs:

minikube ssh
cat /tmp/echo/log
1647344955: SERVICE starting
1647344963: CLIENT waiting for service...
1647344969: CLIENT waiting for service...
1647344975: CLIENT waiting for service...
1647344981: CLIENT waiting for service...
1647344985: SERVICE started
1647344991: CLIENT
Hello world!
1647345004: CLIENT
Hello world!
1647345022: CLIENT
Hello world!
1647345058: CLIENT
Hello world!
1647345129: CLIENT
Hello world!
1647345231: CLIENT
Hello world!