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#jenkins

2 stories

DevOps & CI/CD Bug Report

Jenkins build fails cleaning the workspace: Docker steps left root-owned files behind

Isabel Ferreira · Sep 18, 2026 · 7 min read

Every second build on our Jenkins agent failed at checkout with Permission denied while deleting node_modules. A docker run step in the pipeline had written files as root into the bind-mounted workspace. How we proved it, fixed the user mapping and made cleanup reliable.

Banner: Jenkins agent container blocked from the Docker daemon socket

DevOps & CI/CD Bug Report

Jenkins agent gets permission denied on /var/run/docker.sock after an image rebuild

John Nguyen · Jul 18, 2025 · 9 min read

Every Docker build in Jenkins started failing with permission denied on docker.sock after we rebuilt the agent image. The cause was a group ID mismatch, and the fix made us face what that socket really grants.