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  • WARNING: IPv4 forwarding is disabled. Networking will not work.

    1:Test environment

    [root@docker-node1 ~]# cat /etc/redhat-release 
    CentOS Linux release 7.5.1804 (Core) 
    [root@docker-node1 ~]# uname -r
    3.10.0-862.2.3.el7.x86_64
    [root@docker-node1 ~]# cat /etc/os-release 
    NAME="CentOS Linux"
    VERSION="7 (Core)"
    ID="centos"
    ID_LIKE="rhel fedora"
    

    2:WARNING

    [root@docker-node1 ~]# docker ps -a
    CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
    [root@docker-node1 ~]# docker run -it -d --name rhel01 centos bash
    WARNING: IPv4 forwarding is disabled. Networking will not work.
    379dc7446fb41541fc8d9fd6786ba573c5b9e7a67f077e36eab5747a7bceff42
    

    3:Solution

    [root@docker-node1 ~]# sysctl net.ipv4.ip_forward
    net.ipv4.ip_forward = 0
    [root@docker-node1 ~]# cat /etc/sysctl.conf 
    net.ipv4.ip_forward=1
    [root@docker-node1 ~]# systemctl restart network.service 
    [root@docker-node1 ~]# sysctl net.ipv4.ip_forward
    net.ipv4.ip_forward = 1
    

    4:Success

    [root@docker-node1 ~]# docker run -it -d --name rhel01 centos bash
    773cb6d6143c1d4b7e69236c04b18e3164b92048d7fe0d57aaa074dd6ad2e34c
    [root@docker-node1 ~]# docker ps -a
    CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
    773cb6d6143c        centos              "bash"              12 seconds ago      Up 12 seconds                           rhel01
    

      

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  • 原文地址:https://www.cnblogs.com/xilong-devops/p/9140393.html
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