enable network on ipv6-only hosts #208
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The networkd template explicitly disables IPv6-connectivity. When connecting to a host, the attempt to use IPv6 results in -ENETUNREACH from the guest kernel. If the host is IPv6-only, the host kernel likewise makes attempts to use IPv4 result in -ENETUNREACH. Hence fakemachine has dysfunctional network when invoked on an IPv6-only host. Closes: go-debos#207 Signed-off-by: Helmut Grohne <[email protected]>
| @@ -301,9 +301,6 @@ Type=ether | |||
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| [Network] | |||
| DHCP=ipv4 | |||
| # Disable link-local address to speedup boot | |||
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Does this cause any slow-down as per the comment above ?
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It quite definitely causes a slow-down. Not sure how much. To me the question is more of whether it works at all. I cannot use debos at all as a result of this problem.
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Sorry for the late reply - I've been too busy to do any debos maintainance. Can you check if adding MaxAttempts=10 (with the original LinkLocalAddressing=no) and possibly IPv6AcceptRA=yes works for ipv6-only host & for regular host ?
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LinkLocal=no with IPv6AcceptRA seems wrong; Just doing ipv6 link local addressing would make more sense;
Mind ofcourse this change was done in 2017 so things in systemd might have changed quite a bit. In particular the behaviour of networkd-wait-online could well have changed to not wait for all address families (which i think was the reason for the slowdown)
@helmutg when you say definitely a slowdown; Is that something that you actually noticed during usage or more an expectation :)
The networkd template explicitly disables IPv6-connectivity. When connecting to a host, the attempt to use IPv6 results in -ENETUNREACH from the guest kernel. If the host is IPv6-only, the host kernel likewise makes attempts to use IPv4 result in -ENETUNREACH. Hence fakemachine has dysfunctional network when invoked on an IPv6-only host.
Closes: #207