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.