docker 部署mysql時遇到的坑

1、輸入下面命令，創建mysql容器時報錯

docker run -it\ 
-p 5678:3306\ 
--name=c_mysql\ 
-v $PWD/conf:/etc/mysql/conf.d\ 
-v $PWD/logs:/logs\ 
-v $PWD/data:/var/lib/mysql\ 
-e MYSQL_ROOT_PASSWORD=123456\ 
mysql:5.6

報錯：

unknown shorthand flag: 'p' in --p
See 'docker --help'.

原因：命令輸入不對，空格沒有打好

解決辦法：命令與命令之間最好手動空格

建議直接輸入：

docker run -id -p 5678:3306 --name=c_mysql -v $PWD/conf:/etc/mysql/conf.d -v $PWD/logs:/logs -v $PWD/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:5.6

總結：如果報錯的時候第一時間就仔細的檢查命令格式是否正確，也不會浪費那摩多時間。而且這種低級錯誤百度一般也沒有答案，只能找到其他類似的答案，最後還是回到命令上來仔細觀察之下，才把問題解決了。所以遇到問題應該自己要先思考，對於這個問題，自己能想到的所有可能造成原因有哪些，有什麼可以解決問題的辦法，嘗試完自己知道的所有方法還不行，在百度也不遲。

2、docker端口映射或啓動容器時報

現象：

[root@localhost ~]# docker run -d -p 9000:80 centos:httpd /bin/sh -c /usr/local/bin/start.sh
d5b2bd5a7bc4895a973fe61efd051847047d26385f65c278aaa09e4fa31c4d76
docker: Error response from daemon: driver failed programming external connectivity on endpoint quirky_allen (6bda693d1143657e46bee0300276aa05820da2b21a3d89441e820d1a274c48b6): (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 9000 -j DNAT --to-destination 172.17.0.2:80 ! -i docker0: iptables: No chain/target/match by that name.
(exit status 1)).

[root@localhost ~]# docker start d5b2bd5a7bc4
Error response from daemon: driver failed programming external connectivity on endpoint quirky_allen (4127da7466709fd45695a1fbe98e13c2ac30c2a554e18fb902ef5a03ba308438): (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 9000 -j DNAT --to-destination 172.17.0.2:80 ! -i docker0: iptables: No chain/target/match by that name.
(exit status 1))
Error: failed to start containers: d5b2bd5a7bc4

原因:

docker服務啓動時定義的自定義鏈DOCKER由於某種原因被清掉
重啓docker服務及可重新生成自定義鏈DOCKER

Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT)
target     prot opt source               destination        

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0           !127.0.0.0/8          ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination        
MASQUERADE  all  --  172.17.0.0/16        0.0.0.0/0          
MASQUERADE  tcp  --  172.17.0.2           172.17.0.2           tcp dpt:8080

Chain DOCKER (2 references)
target     prot opt source               destination        
RETURN     all  --  0.0.0.0/0            0.0.0.0/0          
DNAT       tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:8888 to:172.17.0.2:8080
root@router:playbook#iptables -t nat -nL
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT)
target     prot opt source               destination        

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0           !127.0.0.0/8          ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination        
MASQUERADE  all  --  172.17.0.0/16        0.0.0.0/0          
MASQUERADE  tcp  --  172.17.0.2           172.17.0.2           tcp dpt:8080

Chain DOCKER (2 references)
target     prot opt source               destination        
RETURN     all  --  0.0.0.0/0            0.0.0.0/0          
DNAT       tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:8888 to:172.17.0.2:8080

解決辦法:

重啓docker服務後再啓動容器

systemctl restart docker
docker start name