Our stories include a poorly prepared Kafka in Docker, an unexpected network issue for ZooKeeper & ClickHouse, a faulty hardware in the data center, and the PgSQL database optimization.
Sometimes you might need to make changes directly in etcd data of your Kubernetes cluster. Here is our experience in solving network issues using an enhanced version of etcdhelper tool.
Why we have ConfigMaps in Kubernetes? How they are organized and what happens when they change? How can you monitor these changes?
How we have moved a running Cassandra instance between Kubernetes clusters and changed the K8s operator to manage it.
Tutorial to create self-signed certificates and regular SSL certs validated by HTTP and DNS methods of Let's Encrypt ACME server for your Kubernetes clusters.
Our real-life cases and recommendations for making graceful shutdown in Kubernetes applications run on NGINX, PHP-FPM and more.
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