Error establishing a database connection解决

我的这个问题。是数据库连接的问题，我没找到原因，后来用网易的镜像。可以了。

后来mysql起不来，发现是宿主机的共享卷没有权限的问题，所以mysql的容器起不来，所以只要给共享卷授权就可以了

┌──[root@liruilongs.github.io]-[~/docker]
└─$ docker ps | grep -v IMAGE | awk '{print $1}'| xargs docker rm -f
1ce97e8dc071
0d435b696a7e
┌──[root@liruilongs.github.io]-[~/docker]
└─$ docker run -dit --name=db --restart=always -v $PWD/db:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=liruilong -e WORDPRESS_DATABASE=wordpress hub.c.163.com/library/mysql
8605e77f8d50223f52619e6e349085566bc53a7e74470ac0a44340620f32abe8
┌──[root@liruilongs.github.io]-[~/docker]
└─$ docker ps
CONTAINER ID   IMAGE                         COMMAND                  CREATED         STATUS         PORTS      NAMES
8605e77f8d50   hub.c.163.com/library/mysql   "docker-entrypoint.s…"   6 seconds ago   Up 4 seconds   3306/tcp   db
┌──[root@liruilongs.github.io]-[~/docker]
└─$ docker run -itd --name=blog --restart=always -v $PWD/blog:/var/www/html -p 80 -e WORDPRESS_DB_HOST=172.17.0.2 -e WORDPRESS_DB_USER=root -e WORDPRESS_DB_PASSWORD=liruilong -e WORDPRESS_DB_NAME=wordpress hub.c.163.com/library/wordpr
ess
a90951cdac418db85e9dfd0e0890ec1590765c5770faf9893927a96ea93da9f5
┌──[root@liruilongs.github.io]-[~/docker]
└─$ docker ps
CONTAINER ID   IMAGE                             COMMAND                  CREATED         STATUS         PORTS                                     NAMES
a90951cdac41   hub.c.163.com/library/wordpress   "docker-entrypoint.s…"   3 seconds ago   Up 2 seconds   0.0.0.0:49271->80/tcp, :::49271->80/tcp   blog
8605e77f8d50   hub.c.163.com/library/mysql       "docker-entrypoint.s…"   2 minutes ago   Up 2 minutes   3306/tcp                                  db
┌──[root@liruilongs.github.io]-[~/docker]
└─$