Docker 之WARNING: IPv4 forwarding is disabled. Networking will not work. 解决办法

Posted 2022-06-18 在奋斗的大道

今天在本地安装完Docker ,然后启动abh1nav/dockerui 镜像，提示如下错误信息：

[root@localhost home]# docker run -d --privileged --name dockerui -p 9000:9000 -v /var/run/docker.sock:/var/run/docker.sock abh1nav/dockerui
WARNING: IPv4 forwarding is disabled. Networking will not work.
97f024c55d667e6b2ea6efa0e019a1118358f396f3bc112adf2d77a7fc17a95a

造成此类问题原因：因Vmware 网桥配置没有开启转发功能，需要编辑/etc/sysctl.conf,添加net.ipv4.ip_forward=1即可。

MobaXterm 实际操作:

#配置转发
[root@localhost etc]# vim /etc/sysctl.conf
#重启网络服务，让配置生效
[root@localhost etc]# systemctl restart network
#查看是否成功,如果返回为“net.ipv4.ip_forward = 1”则表示成功
[root@localhost etc]# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1
# 重新启动docker 服务
[root@localhost etc]# systemctl restart docker
# 查看docker 服务状态
[root@localhost etc]# systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: active (running) since 三 2022-06-15 15:07:39 CST; 14s ago
     Docs: https://docs.docker.com
 Main PID: 89956 (dockerd)
    Tasks: 19
   Memory: 21.2M
   CGroup: /system.slice/docker.service
           ├─89956 /usr/bin/dockerd
           └─89963 docker-containerd --config /var/run/docker/containerd/containerd.toml
******
# 查看正在运行的容器
[root@localhost etc]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
# 查看所有运行的容器记录
[root@localhost etc]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                          PORTS               NAMES
97f024c55d66        abh1nav/dockerui    "./dockerui"             26 minutes ago      Exited (2) About a minute ago                       dockerui
6c94b90f2ca7        centos              "/bin/sh -c 'while t…"   3 hours ago         Exited (137) 58 seconds ago                         friendly_noyce
c587f4387b92        c20987f18b13        "docker-entrypoint.s…"   4 hours ago         Exited (1) 4 hours ago                              upbeat_rosalind
38f095df58c1        c20987f18b13        "docker-entrypoint.s…"   4 hours ago         Exited (0) 4 hours ago                              youthful_clarke
a7963718f711        c20987f18b13        "docker-entrypoint.s…"   4 hours ago         Exited (1) 4 hours ago                              friendly_kepler
# 重新启动指定容器
[root@localhost etc]# docker restart 97f024c55d66
97f024c55d66
# 查看正在运行的容器
[root@localhost etc]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                    NAMES
97f024c55d66        abh1nav/dockerui    "./dockerui"        28 minutes ago      Up 7 seconds        0.0.0.0:9000->9000/tcp   dockerui
[root@localhost etc]#

核心指令片段：

vim /etc/sysctl.conf
 
#配置转发
net.ipv4.ip_forward=1
 
#重启服务，让配置生效
systemctl restart network
 
#查看是否成功,如果返回为“net.ipv4.ip_forward = 1”则表示成功
 
sysctl net.ipv4.ip_forward