vm虚拟机挂起后docker容器访问失败

前提，防火前全部关闭

# 关闭防火墙
systemctl stop firewalld
# 禁止开机自启
systemctl disable firewalld

解决方法

1. Docker 重启（治标不治本）

# 重启docker服务
systemctl restart docker
# docker -q 静默模式，只显示容器编号
docker start $(docker ps -qa)

2. 开启 ipv4 转发功能

echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
systemctl restart network
# 查看
sysctl net.ipv4.ip_forward
# 出现 net.ipv4.ip_forward=1 即为成功

注意：这里如果报错可尝试将MAC地址添加到 ifcfg-ens33（网卡配置文件）中

# 查看 ip
[root@cc ~]# ip addr
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:04:ca:00 brd ff:ff:ff:ff:ff:ff
    inet 192.168.138.10/24 brd 192.168.138.255 scope global noprefixroute ens33...

# 00:0c:29:04:ca:00 就是MAC地址
[root@cc ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33 
# 文件添加 HWADDR=00:0c:29:04:ca:00
# 重新启动 
systemctl restart network