6 solutions for network failure in Docker container

6 solutions for network failure in Docker container

Note: The following method is a solution that allows you to ping the public IP in the container. If you cannot ping the public IP, the host may not be able to access the Internet (try ping 8.8.8.8)

1. Use the –net:host option

sudo docker run --net:host --name ubuntu_bash -i -t ubuntu:latest /bin/bash

2. Use –dns option

sudo docker run --dns 8.8.8.8 --dns 8.8.4.4 --name ubuntu_bash -i -t ubuntu:latest /bin/bash

3. Change DNS server

vi /etc/default/docker
Remove the # sign before "docker_OPTS="–dns 8.8.8.8 --dns 8.8.4.4""

4. No need for dnsmasq

vi /etc/NetworkManager/NetworkManager.conf
Add a # before dns=dnsmasq to comment it out

sudo restart network-manager
sudo restart docker

5. Rebuild the docker0 network

pkill docker #Terminate the process iptables -t nat -F #Clear all chains in the nat table ifconfig docker0 down #Stop the docker default bridge brctl delbr docker0 #Delete the bridge docker -d

6. Modify /etc/hosts directly in docker

Summarize

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