part4

Question 1

have you deployed any cluster managed by AWS? please explain ?

Answer 1

for production, we AWS EKS cluster and if there is a need for staging environment to have a cluster, we leverage Kops.

Question 2

what are load balancers in AWS, briefly explain which one you have used.

Answer 2

Load Balancers distribute incoming traffic across multiple targets, such as EC2 instances, containers, or Lambda functions, to ensure high availability and fault tolerance.

I used ALB in a project where it routed traffic to EC2 instances based on path-based rules. For example, API traffic (/api) was directed to a backend service, while static content (/static) was served from another.

Question 3

have you used SonarQube ? if yes share why it is important.

Answer 3

• Yes, I have used SonarQube in my projects. It’s an open-source platform for continuous code quality inspection. It helps detect bugs, vulnerabilities, code smells, and maintainability issues in codebases
• In one of my projects, we integrated SonarQube into our Jenkins CI pipeline. Every time a developer pushed code to the repository, the pipeline ran a SonarQube scan to analyze the code for bugs, vulnerabilities, and maintainability issues.

Question 4

how do you handle incidents in your team?

Answer 4

we set up alert rules from monitoring systems, if anything happens the on call engineer gets a phone call or email. then we go back and figure out what happened and how to prevent it from happening in the future.

Question 5

How do you validate a variable file in terraform ?

Answer 5

we can use a validation block in which we mention the conditions that have to be met during the plan phase.

Question 6

explain CMD and entry point in docker, are they the same or different ?

Answer 6

• Entrypoint [“echo” “hello”]
• CMD [“echo” “hello’]
• CMD[“echo”]
  Entrypoint [“hello”]

Question 7

multiple EC2 instances in ASG are getting terminated how do you debug this issue ?

Answer 7

• run the top command to see cpu utilization
• ## run a free -m to see the memory left

Question 8

what is terraform state lock .

Answer 8

state locking is a mechanism that prevents multiple processes or users from simultaneously making changes to the same state file

Question 9

How do you enable notification for job success or failure in Jenkins ?

Answer 9

As a main communication tool, i have used slack.
- First find out if there is a plugin that needs to be installed
- Then configure the pipeline accordingly to send notifications on failure or success.

Question 10

what do you think is the future towards your DevOps journey ?

Answer 10

There are some technologies that i am not very competent in, and i look forward in solidifying my knowledge on them, and keep on learning. Work closely with my seniors and implement some of these technologies whhere needed.