Master Docker Deployment: From Installation to Advanced Container Management

Docker Installation

Install Docker on CentOS by removing old versions, adding the yum repository, installing packages, starting the service and verifying with docker ps.

Common Docker Commands

docker pull – download images

docker run – create and start a container (example:

docker run -d --name mysql -p 3306:3306 -e TZ=Asia/Shanghai -e MYSQL_ROOT_PASSWORD=123 mysql

)

docker ps – list running containers

docker stop / start / rm – manage container lifecycle

docker logs – view container output

Data Volumes

Use -v to mount host directories or Docker volumes, allowing persistent data and configuration sharing between host and container. Example mounting /var/lib/docker/volumes/html/_data to /usr/share/nginx/html for Nginx.

Custom Images and Dockerfile

Create a Dockerfile with instructions such as FROM , COPY , RUN , EXPOSE , and ENTRYPOINT to build layered images. Build with docker build -t myapp:1.0 . and run the image.

Networking

Create a user‑defined bridge network ( docker network create mynet) and connect containers with aliases so they can reach each other by name without IP addresses.

Project Deployment

Package a Java application into a JAR, write a Dockerfile, build the image, and run it with port mapping. Deploy a static front‑end using an Nginx container with volume mounts for html and conf directories.

Docker Compose

Define services (MySQL, application, Nginx) in a docker-compose.yml file, specifying container_name, ports, environment, volumes, and networks. Use docker compose up -d to start all services together.