kubectl attach kubectl exec We can attach to the main process run by the container, which is not always bash. Which is the PID1. It allows us to execute any process within the container Attach to the one running (no choice) Run any command you want to execute.

We use PKI certificates for authentication over TLS in Kubernetes. If we install Kubernetes with “kubeadm” command, the certificates that your cluster requires are automatically generated. You can also generate our own certificates. How Certificates are used in Kubernetes Cluster: Client certificates for the kubelet to authenticate to the API server Server certificate for the API server endpoint Client certificates for administrators of the cluster to authenticate to the API server Client certificates for the API server to talk to

What is Kubernetes?— Launched by Google— Part of CNCF— Written in golang— Kubernetes is a container orchestrator, and helps to manage containerized applications— Helps in workload placement on different nodes— Does infrastructure abstraction— Maintains desired state. Why Kubernetes?— speed of deployment— ability of absorb changes— ability to recover quickly— We can deploy a scalable solution using kubernetes— hide complexity in the cluster How Kubernetes works?Components of Kubernetes: kube-apiserver — front-end to the control plane.— expose the Rest API— uses JSON