DevOps and continuous delivery in Software Engineering - Step-by-Step Execution

Concept Flow - DevOps and continuous delivery

Developer writes code

↓

Code committed to repository

↓

Automated build triggered

↓

Automated tests run

↓

If tests pass

→Package and deploy to staging

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Manual or automated approval

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Deploy to production

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Monitor and feedback

↩Back to Developer writes code

This flow shows how code moves from development to production automatically with testing and approvals, enabling fast and reliable software delivery.

Execution Sample

Software Engineering

1. Developer commits code
2. CI server builds code
3. Tests run automatically
4. If tests pass, deploy to staging
5. After approval, deploy to production

This sequence automates building, testing, and deploying software to deliver updates quickly and safely.

Analysis Table

Step	Action	Result	Next Step
1	Developer commits code	Code added to repository	Trigger build
2	CI server builds code	Build successful	Run tests
3	Automated tests run	Tests pass	Deploy to staging
4	Deploy to staging	App available in staging	Approval for production
5	Approval given	Ready for production deploy	Deploy to production
6	Deploy to production	App live for users	Monitor and feedback
7	Monitor app	Collect feedback and errors	Developer fixes issues or adds features
8	Developer commits code	Cycle repeats	Trigger build

💡 Process repeats continuously to deliver updates quickly and reliably.

State Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	After Step 5	After Step 6	After Step 7
Code State	No new code	Committed to repo	Built successfully	Tests passed	Deployed to staging	Approved for production	Deployed to production	Monitored and feedback collected
Deployment Status	No deployment	No deployment	No deployment	No deployment	Staging deployment	Ready for production	Production deployment	Running in production

Key Insights - 3 Insights

Why do automated tests run before deployment?

Automated tests ensure the code works correctly before it reaches users. As shown in step 3 of the execution_table, tests must pass to proceed to deployment, preventing broken software from being released.

What happens if tests fail during the process?

If tests fail, the process stops and does not deploy. This is implied in the execution_table where only 'Tests pass' leads to deployment. Developers must fix issues before continuing.

Why is there a staging deployment before production?

Staging allows testing in an environment similar to production without affecting real users. Step 4 shows deployment to staging, which helps catch issues early and gain approval before live release.

Visual Quiz - 3 Questions

Look at the execution_table, what is the result after step 3?

A Code committed

B Build failed

C Tests pass

D Deployed to production

💡 Hint

Check the 'Result' column for step 3 in the execution_table.

At which step does the deployment to production happen?

A Step 6

B Step 2

C Step 4

D Step 1

💡 Hint

Look for 'Deploy to production' in the 'Action' column of the execution_table.

If tests fail at step 3, what happens next?

A Deploy to staging anyway

B Process stops, no deployment

C Deploy directly to production

D Skip tests and build again

💡 Hint

Refer to key_moments about test failures and the execution_table flow.

Concept Snapshot

DevOps and continuous delivery automate software build, test, and deployment.
Code is committed, built, and tested automatically.
Passing tests trigger deployment to staging.
After approval, code deploys to production.
Monitoring feedback closes the loop for improvements.

Full Transcript

DevOps and continuous delivery is a process where developers write and commit code, which triggers an automated build and test sequence. If tests pass, the code is deployed first to a staging environment for further checks and approval. Once approved, the code is deployed to production where users can access it. Monitoring tools collect feedback and errors, which helps developers improve the software continuously. This cycle repeats to deliver updates quickly and reliably.