Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now ReplicaSet: A ReplicaSet’s purpose is to maintain a stable set of replica Pods running at any given time. As such, it is often used to guarantee the availability of a specified number of identical Pods. There are many ways we can use replicasets such that always required number of pods running is guarangteed. While

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Kubernetes works with Kubernetes cluster and a control plane. Kubernetes cluster is a combination of nodes with atleast one Master node and a worked node. Control plane components: Api Server: Provides Api to connect to worker nodes Cluster store (etcd): Persistant storage of cluster state and it stores data in key and value pair

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Kubernetes is an open source tool to manage containerized applications, it was initially developed by Google. Kubernetes solves the problem of managing containers to automatically scale-up/ scale-down when the nodes having the container fails, so it will deliver the required performance with the desired number of services are always running. Kubernetes also provides the

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Multiple services can be defined and run together making it easier to run. Can make all the services up and down at a time. Can make even a single service up/down Multiple isolated environments on a single host Preserve volume data when containers are created Only recreate containers that have changed Variables and moving

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now 5 Differences between CMD and ENTRYPOINT with example CMD Entrypoint the executable command will be replaced by the command 1. The executable command can’t be changedgiven while running the container We can’t pass the arguments for the CMD command 2. The commands passed while running the container will be appended to the RUN command

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now What about if you 2 CMD? It will remove the intermediate container and take the latest changes. FROM ubuntu MAINTAINER Rajesh Kumar << rajesh@scmgalaxy.com>> ENV DEBIAN_FRONTEND=noninteractive RUN apt-get update RUN apt-get -y install tzdata RUN apt-get install git -y && apt-get install -yq apache2 CMD echo “Hello world” CMD echo “Hi” result: Hi Last

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now What is docker update and docker wait? Explain with example commands. Docker Update:Update the container configuration like cpu, memory, restart policy, etc. docker update –kernel-memory 512M rameshdocker update –restart=on-failure:3 rameshdocker update –cpus 2 rameshdocker update –restart=no ramesh Docker Wait: Block until one or more containers stop, then print their exit codes. docker wait ramesh127docker

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now What is diff between docker pause/unpause and stop/kill? Docker Pause will suspend all the process inside a container by sending SIGSTOP command, where as in Docker stop the main process will receive SIGTERM and after a grace period it receives SIGKILL. SIGSTOP is the pause signal. The only behavior is to pause the process;

Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now What is Docker? Docker provides a platform for running applications in a containerized approach, where in each container have a file system, pid map and own network. Docker directly interacts with kernel to create mount, pid map, network and a user for each application. Below are the docker components. Docker Engine Docker Engine is