Docker – How to you disable IPv6 in Docker on CentOS7

centos7dockeripv6

I have tried the normal methods (e.g. https://wiki.centos.org/FAQ/CentOS6#head-d47139912868bcb9d754441ecb6a8a10d41781df). And even though sysctl net.ipv6.conf.default.disable_ipv6 returns 1 on my host system, it always returns 0 inside my container.

Thanks!

Best Answer

There issue in docker: #20569 In this issue there mato's comment that docker option --sysctl net.ipv6.conf.all.disable_ipv6=1 partialy fix this issue.

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Docker Security Updates – How to Handle Updates in Containers

A Docker image bundles application and "platform", that's correct. But usually the image is composed of a base image and the actual application.

So the canonical way to handle security updates is to update the base image, then rebuild your application image.

Ubuntu – Ipv6 over bridged network stops working after some time (Ubuntu LXC)

Try disabling multicast snooping:

echo -n 0 > /sys/class/net/<brif>/bridge/multicast_snooping

Or enabling multicast querier (very early):

echo -n 1 > /sys/class/net/<brif>/bridge/multicast_querier

https://askubuntu.com/a/688854/11831

Best Answer

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Ubuntu – Ipv6 over bridged network stops working after some time (Ubuntu LXC)

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