Pods are the smallest deployable units of computing that you can create and manage in Kubernetes. A Pod is a group of one or more containers, with shared storage and network resources, and a specification for how to run the containers. a Pod can contain init containers that run during Pod startup. a Pod is similar to a group of Docker containers with shared namespaces and shared filesystem volumes. Some Pods have init containers as well as app containers. Init containers run and complete before the app containers

Master Api server -> POD -> Container -> Docker image –> Google Registry validates and configures data for API objects, including pods and services. The API Server provides the frontend to the cluster’s shared state, which is where all of the other components interact Etcd -> POD -> Container -> Docker image –> Google Registry etcd is a distributed key-value store and the primary datastore of Kubernetes. It stores and replicates the Kubernetes cluster state. Controller mgmr -> POD ->

Docker Image is a collection of file system rootfs (base) + ufs + appfs 2. 1 COPY of image of get mounted to each container. 3. Image name is the same as repo name 4. repo can be stored in registry (dockerhub etc) 5. Docker images contains multiple file system and each file system is referred to as layer. 6. Base layer is always — root file system 7. When we create a container – all layers are merged into

wait: Block until one or more containers stop, then print their exit codes in other terminal, if we stop the container, then will get the status code 0 update: docker inspect docker update similarly we can do for other configurations as well

Create a POST on bestDevops.com and answer following questions? Install Docker in your assigned VM? Installed the Docker in the VM. — [root@ip-172-31-8-134 centos] Verification: Verify docker installation and basic commands? Self proov it – What is Container? Playing with different Docker commands:- Container Lifecycle? create -> start -> stop -> start -> restart -> pause -> unpause -> kill -> remove Create a container: Pulling a jenkins image.: start a container: stop the container start and restart pause and