Hello, prawns!
I launch a container (docker version 18.06.1 build e68fc7a) in Ali CVM, and the command is as follows:
docker run --detach -it --publish 3030:3000/tcp -v : --name --restart always centos:latest /bin/bash
Container starts successfully and, docker ps-a has no problem checking port mapping:
netstat -ntpl3030TCP6:
3030
:
0.0.0.0/03030:
iptablesseliunx:
I guess this problem is the reason why your host does not have a public network ip
didn't take a closer look at it just now. Docker's port mapping is implemented using iptables, and you use the iptables-L command to display the filter table by default. There is no reference point. You can use the iptables-save command.
Bash telnet
,WARNING: IPv4 forwarding is disabled. Networking will not work.
1-sharp vim /usr/lib/sysctl.d/00-system.conf
2net.ipv4.ip_forward=1
3-sharp systemctl restart network
my environment and situation are similar to those of the landlord. I would like to ask: why is it that this machine can communicate with telnet, but not with public network ip?
I guess you may be using a mirrored docker, from another machine. You need to delete the existing docker and then rebuild the docker. Or there is a possibility that the network segment of your docker conflicts with that of the host.
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