Tojan – Best DevOps

What are the new major changes happend in kubernetes 1.22?

Tojan — Tue, 24 Aug 2021 13:39:19 +0000

What are the new major changes happened in Kubernetes 1.22?
Server-Side Apply made generally available
External credential providers, available by way of plug-ins
Etcd, the default back-end storage for Kubernetes has been updated to a new release (3.5.0)
Better support for developing and running on Microsoft Windows.
QoS for memory resources is available as a beta feature. The cgroups v2 API can now be used to designate how memory is allocated and isolated for pods, making it easier to deploy multiple applications that might fight each other for memory usage.

List of container runtime tools which is supported by Kubernetes?

Tojan — Tue, 24 Aug 2021 13:37:05 +0000

Docker
CRI-O
containerd

What is Kubernetes pod?

Tojan — Tue, 24 Aug 2021 13:36:22 +0000

A pod is the smallest execution unit in Kubernetes. A pod encapsulates one or more applications. Pods are ephemeral by nature, if a pod (or the node it executes on) fails, Kubernetes can automatically create a new replica of that pod to continue operations. Pods include one or more containers.

What is Docker volume and how to work with it?

Tojan — Tue, 24 Aug 2021 13:35:34 +0000

To have persistent data and to share data between containers, Docker came up with the concept of Docker Volume.
Volumes are directories that are outside of the default File System and exist as normal directories and files on the host filesystem.
As it the volume is outside the container and on host machine, data will not be lost on removal of container. New container can use the same files and directories from the volume.

What is continuous integration?

Tojan — Mon, 23 Aug 2021 17:24:23 +0000

Continuous integration is a software development process where developers integrate the new code they’ve written more frequently throughout the development cycle, adding it to the code base at least once a day. Once the code is commited to the repository, automated build, code analysis,scanning, coverage, testing are performed. Continuous feedback system is enabled to respective stakeholders to take necessary action without any delay. Overall, continuous integration helps streamline the build process, resulting in higher-quality software and more predictable delivery schedules.

Define git workflow and list down all the git workflow options

Tojan — Mon, 23 Aug 2021 17:23:28 +0000

Git workflow helps to establish common processes across the organization and streamline the software development

Centralized Git workflow
Feature branching
Trunk-based development
Personal branching
Forking

Write down steps to add new linux node of Jenkins?

Tojan — Mon, 23 Aug 2021 17:18:22 +0000

Step 1: Setup and Configure (Install Java and other required tools) the linux machine identified as node
Step 2: Generate SSH Key on Master node
Step 3. Add Public key in node machine
Step 4: Add node using Jenkins web

List down top 20 jenkins plugins

Tojan — Mon, 23 Aug 2021 17:17:21 +0000

LDAP
Role-based Authorization Strategy
Bitbucket
Bitbucket server integration
Cobertura plugin
Credentials
SSH Credentials
Jacoco
Git
JUnit
Mailer
Multibranch
Email Extension Template
SonarQube Scanner
Amazon ECR plugin
Nexus Artifact Uploader
Docker
S3 publisher
List Git Branches parameter
Kubernetes
Ansible

Git is not a file versioning tool. Its file system versioning tool. How?

Tojan — Mon, 23 Aug 2021 17:12:25 +0000

Git is not storing each and every file in the repository during the every commit. That is why it is not versioning tool.
Instead, Git looks at data more like a set of snapshots of a mini filesystem.
For every commit, Git takes a snapshot of what all your files, look like at that moment and stores a reference to that snapshot.
To be efficient, if files have not changed, Git doesn’t store the file again, just a link to the previous identical file it has already stored.