Docker问题：容器互连时访问宿主机出现“No route to host”的问题

男娘i 2021-10-16 00:52 422阅读 0赞

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#### Docker问题：容器互连时访问宿主机出现“No route to host”的问题 ####

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#### 问题： ####

环境：`CentOS`、离线安装的`docker`环境  
场景：博主在用离线镜像`tar`包安装`mysql`后，运行并在`Windows`上用`Navicat`和`java`项目都可以连接上，但是将项目打包成镜像部署到服务器上启动时，报错了，两条错误信息：

*  1.The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
 *  2.No route to host

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个人估计是网络配置的原因，创建docker服务后，docker会有一个默认的内部网络，`172.17.0.1`  
查看网络信息，命令：`ip a`

[root@localhost server]# ip a
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
        link/ether 02:42:93:3b:ac:9f brd ff:ff:ff:ff:ff:ff
        inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
           valid_lft forever preferred_lft forever
        inet6 fe80::42:93ff:fe3b:ac9f/64 scope link noprefixroute 
           valid_lft forever preferred_lft forever

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#### 解决方法：依次执行以下命令即可 ####

nmcli connection modify docker0 connection.zone trusted
    
    systemctl stop NetworkManager.service
    
    firewall-cmd --permanent --zone=trusted --change-interface=docker0
    
    systemctl start NetworkManager.service
    
    nmcli connection modify docker0 connection.zone trusted
    
    systemctl restart docker.service

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执行完上面的命令后，再启动前面创建的容器即可

参考博客：https://blog.csdn.net/iouczp/article/details/80300500

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##### 相关博客：[离线安装docker服务][docker]. #####

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[docker]: https://blog.csdn.net/qq_25112523/article/details/99753189