樓上的回答已經(jīng)講的很清楚了，db服務(wù)沒(méi)有定義，在compose中l(wèi)ink并不是鏈接容器，而是服務(wù)，并且compose啟動(dòng)的時(shí)候會(huì)單獨(dú)create network ，也并不是和db-mysql在同一個(gè)網(wǎng)絡(luò)中

$docker ps

$docket network ls

$docker-compose ps

解決這個(gè)問(wèn)題，2點(diǎn)

1.把db也使用compose管理，定義在compose.yml文件中

db-mysql

.....

2.把webserver服務(wù)加入到和dbmysql一個(gè)網(wǎng)絡(luò)中

例如：

db-backup.yml

version: '3.0'

services:

# 啟動(dòng)一次備份服務(wù) ./docker-compose restart backup

backup:

image: mysql:5.7

environment:

MYSQL_HOST: mysql

MYSQL_DATABASE: package_v1

MYSQL_USER: root

MYSQL_PASSWORD: zhaojun

external_links:

- dockerprintproject_mysql-db_1:mysql

volumes:

- /etc/localtime:/etc/localtime:ro

- ./data/backup:/backup:rw

- ./dockerfiles/backup/:/app:ro

entrypoint:

- /bin/bash

command: /app/backup-default.sh

啟動(dòng)備份

[root@docker docker-print-project]# docker-compose -f db-backup.yml up

產(chǎn)品docker-compose.yml 部分服務(wù)

version: '3.0'

services:

nginx:

image: nginx:1.13.3

volumes:

#網(wǎng)站目錄

- ./app:/var/www/html

- ./dockerfiles/nginx/conf.d:/etc/nginx/conf.d:ro

- /etc/localtime:/etc/localtime:ro

- ./logs/nginx:/var/log/nginx

ports:

- "80:80"

deploy:

restart_policy:

condition: any

command: nginx -g 'daemon off;'

mysql-db:

image: mysql:5.7

volumes:

- ./data/mysql:/var/lib/mysql:rw

- /etc/localtime:/etc/localtime:ro

- ./logs/mysql:/var/lib/mysql-logs:rw

- ./dockerfiles/mysql/conf.d:/etc/mysql/conf.d:ro

environment:

MYSQL_ROOT_PASSWORD: zhaojun

MYSQL_DATABASE: package_v1

MYSQL_USER: zhaojun

MYSQL_PASSWORD: zhaojun

deploy:

restart_policy:

condition: any

docker ps

總結(jié)

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