How can you see if there have been any changes, who rolled out what?

To find out if there have been changes and who deployed them, version control systems and CI/CD tools are usually used.

For example, in Git, you can view the commit history:

git log --oneline --author=username

To view the latest deployments in Kubernetes, you can use:

kubectl rollout history deployment/deployment_name

Also, in CI/CD systems (Jenkins, GitLab CI, GitHub Actions), there are logs and a history of runs where you can see who and when triggered a deployment pipeline.

If a monitoring or logging system is used (e.g., ELK, Prometheus), information about deployment events can also be found there.