Daily DevOps Interview Questions Day #72

Daily Interview Questions for SRE and DevOps engineers

Question of the day:

You just deployed a new microservice to production using a Helm chart from your platform team. The deployment succeeds, pods are running, health checks pass. But when you test the API, you get:

curl https://api.company.com/new-service/health
503 Service Temporarily Unavailable

You check the ingress controller logs and see:

[error] upstream timed out (110: Connection timed out) while connecting to upstream
no live upstreams while connecting to upstream

Meanwhile:

• The pods are running perfectly with 0 restarts

• kubectl port-forward to the pod works fine - the app responds