docker 启动mysql问题，You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQ

dokcer启动mysql时，无法启动成功，查看日志报错为You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD

[root@localhost /]# docker run -dit mysql --restart always -e MYSQL_DATABASE="zabbix" -e MYSQL_USER="zabbix" -e MYSQL_PASSWORD="zabbix_pwd" -e MYSQL_ROOT_PASSWORD="root_pwd" mysql-zabbix
5d6dadbf889fd7f3f6cfec8e45dc12a5560b9e8ccc4973dceaf3eb2cea34451b
[root@localhost /]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
c5557254c6d9        tomcat              "catalina.sh run"   43 minutes ago      Up 28 minutes       8080/tcp            fervent_goldstine
[root@localhost /]# docker logs 5d6dadbf889fd7f3f6cfec8e45dc12a5560b9e8ccc4973dceaf3eb2cea34451b
2019-12-13 09:39:38+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.18-1debian9 started.
2019-12-13 09:39:39+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
2019-12-13 09:39:39+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.18-1debian9 started.
2019-12-13 09:39:39+00:00 [ERROR] [Entrypoint]: Database is uninitialized and password option is not specified
        You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD

    通过查找文档，在使用mysql镜像的时候需要提供mysql用户名和密码，如果是使用root用户登录的时候，需要提供root用户的密码。提供密码的方式很简单，就是使用docker run 的-e 指令，但是有在启动的时候已对指定了相关参数为什么还是不行呢。

[root@localhost /]# docker run -dit --restart always -e MYSQL_DATABASE="zabbix" -e MYSQL_USER="zabbix" -e MYSQL_PASSWORD="zabbix_pwd" -e MYSQL_ROOT_PASSWORD="root_pwd" mysql
ce1a2d4fbaef8aeb7ff4d788c834c744a39c1cee37fa574da2bfff07d699c151
[root@localhost /]# 
[root@localhost /]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                 NAMES
ce1a2d4fbaef        mysql               "docker-entrypoint.s…"   3 seconds ago       Up 2 seconds        3306/tcp, 33060/tcp   recursing_mcnulty
c5557254c6d9        tomcat              "catalina.sh run"        53 minutes ago      Up 38 minutes       8080/tcp              fervent_goldstine

发现自己范了一个低级错误，参数应该在容器之前添加，有时候顺序还是很重要的。