Docker Modify docker Storage Location Modify Container Image Size Limit Operation

The new version seems to be dying, so it is not recommended.

No, you can modify the storage location directly by soft connection.

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 was obsolete after version 17.0, and now data-root is advocated

Additional knowledge: The docker orchestration tool uses docker-compose

Installing 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 configuration file, comment out metalink, uncomment baseurl

Operation command

compose Operation Container (1 must enter the profile directory)

Background startup container: docker-compose up-d

View container performance: docker-compose ps

Stop and delete container: docker-compose down

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

Stop startup container: docker-compose stop; docker-compose start

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

Summary:

Operation docker-compose1 must operate under the configuration file docker-compose. yml file path

Format 1 Be sure to note that this space is a space

Configuration file

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", which defaults to bridging

Actual combat: simulating the establishment of personal blog

wordpress Free Blog 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 ) To 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