Docker lifecycle explainer pops up
Uday posted a concise breakdown of the Docker container lifecycle (Image → Created → Running → Stopped → Removed) with commands and real deploy examples, emphasizing shortcuts like 'docker run nginx' to create+start containers explained here. It’s a tidy refresher for backend infra interviews and for writing reproducible DevOps notes in a portfolio.
Uday's public GitHub repository lists 2,624 DevOps exercises covering topics from Docker to Kubernetes and AWS, underscoring the author's focus on hands‑on infra drills. (github.com) The Docker CLI reference documents that docker create constructs a writable container layer and prints the container ID without starting the container. (docs.docker.com) Docker's running guidance shows the CLI starts containers in the foreground by default and provides the --detach (-d) flag to run a container in the background. (docs.docker.com) Official and community troubleshooting guides call out additional lifecycle states beyond basic up/down — notably Paused and Dead — and surface 'dead container' removal patterns for cleanup failures. (w3tutorials.net) Common deployment examples use detached mode plus explicit port mapping; tutorials demonstrate commands like docker run -d --name my-nginx -p 80:80 nginx:1.25 for a production‑style nginx container. (oneuptime.com) Docker Engine architecture describes the daemon dockerd as the coordinator that forwards image pulls and lifecycle work to containerd, which in turn invokes runc to create the Linux process namespaces and cgroups. (docs.docker.com) Uday's repo includes hands‑on container labs such as a multi_stage_builds exercise under the topics/containers path, providing concrete practice material for interview prep and portfolio projects. (github.com)
