Docker Modify Docker storage location Modify container image size limit operation

This seems to be no longer possible with the new version and is not recommended.

If not, you can directly use soft link to modify the storage location.

vim /usr/lib/systemd/system/docker.service

ExecStart=/usr/bin/dockerd --graph=/work/docker_data 
--storage-driver devicemapper 
--storage-opt dm.loopdatasize=1000G 
--storage-opt dm.loopmetadatasize=10G 
--storage-opt dm.fs=ext4 
--storage-opt dm.basesize=100G 
-H fd:// --containerd=/run/containerd/containerd.sock

Supplement 2020.07.29

–graph is deprecated after version 17.0. Now it is recommended to use –data-root

Additional knowledge: Docker orchestration tool uses docker-compose

Install docker-compose

yum install -y epel-release

yum install -y python-pip

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple docker-compose==1.24.1

# If python-pip reports an error

vim /etc/yum.repos.d/epel.repo Modify the configuration file, comment out metalink, and uncomment baseurl

Operation Command

Compose operation container (be sure to enter the configuration file directory)

Start the container in the background: docker-compose up -d

Check the running status of the container: docker-compose ps

Stop and delete the container: docker-compose down

Stop and remove the container and delete the volume: docker-compose down --volumes

Stop and start the container: docker-compose stop; docker-compose start

Use of docker-compose exec: docker-compose exec redis bash

Summarize:

To operate docker-compose, you must operate in the path of the configuration file docker-compose.yml

Be sure to pay attention to the format, the space should be a space

Configuration Files

docker-compose.yml

version: '3'
services:
 nginx:
 image: mycentos:nginx
 ports:
 - "8080:80"
 volumes:
 - /home:/usr/local/nginx/html
 - /var/logs/nginx/logs:/usr/local/nginx/logs
 command: /usr/local/nginx/sbin/nginx -g "deamon off;"
 
 redis:
 image: mycentos:redis
 ports:
 - "6380:6379"

If you change to host mode, remove ports and add network_mode: "host", the default is bridge

Practice: Simulate the construction of a personal blog

wordpress free blogging platform

docker-compose.yml

version: '3.3'
services:
 db:
 image:mysql:5.7
 volumes:
 -db_data:/var/lib/mysql
 restart: always
 environment:
 # Specify environment variables docker -itd -e MYSQL_ROOT_PASSWORD= somewordpress
 MYSQL_ROOT_PASSWORD: somewordpress
 MYSQL_DATABASE: wordpress
 MYSQL_USER: wordpress
 MYSQL_PASSWORD: wordpress
 
 wordpress:
 depends_on: # 1. Start the above db (dependency) first before it can be installed 2. docker link
 -db
 image: wordpress:latest
 ports:
 - "8000:80"
 restart: always
 environment:
 WORDPRESS_DB_HOST: db:3306
 WORDPRESS_DB_USER: wordpress
 WORDPRESS_DB_PASSWORD: wordpress
 WORDPRESS_DB_NAME: wordpress
volumes:
 db_data: {}
 # Corresponding to the top volumes:

Find Volume Label

docker volume ls

docker volume inspect <volume-id>

Mountpoint host path

The corresponding is /var/lib/mysql

The above Docker changes the docker storage location and changes the container image size limit operation is all the content that the editor shares with you. I hope it can give you a reference. I also hope that you will support 123WORDPRESS.COM.