IPv6 networking: mention --flannel-ipv6-masq in dual stack and single stack ipv6 section #330
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brandond
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Oct 4, 2024
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Thanks for the PR! Please sign-off your commit for DCO. |
Signed-off-by: recursivetree <recursivetreemail@gmail.com>
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Should be done, thanks. I've also opened an issue because the requirement for |
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I run a cluster in dual stack mode using a cidr from the ULA range following the dual stack docs. Using these instructions, I noticed that pods use their pod IP for (cluster-external) outgoing connections, in this case meaning a ULA address, which obviously does not work. What I intended is that they use the host's address. After some googling, I found the
--flannel-ipv6-masqoption that does what I want. It is documented in the flannel section: https://docs.k3s.io/networking/basic-network-options#flannel-options. However, I think this should also be mentioned in the dual stack and single stack sections, as it is not given that people also read the flannel section.This PR adds a mention of the need to add
--flannel-ipv6-masqif using unroutable IPv6 ranges for a cluster.I'd argue this use case is relatively common. For example, on many cloud platforms you just get a /64 or even a /128, so using something like ULAs is probablly a must.