networkd: make s-n-wait-online wait for at least one routable interface #482
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Generally, we should be waiting on "routable" state (instead of "degraded") when we have static IP/dhcp4/dhcp6/RA. Our spec defines "at least one interface MUST be up on the link layer and have received layer 3 (IP) configuration" (ignoring link-local). We now start two separate "systemd-networkd-wait-online" processes. One waiting for "carrier" & "degraded" interfaces, not using "--any". Another one waiting just for "routable" interfaces, combined with "--any". Both blocking "network-online.target".
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It seems to be working as intended.
I just left one thought about bonds. I'm not sure if we should wait for carrier on all the members by default. The system doesn't need to have carrier on all the bond members to be online.
But to have it waiting for any member we'd need to create groups of members for each bond and have one call to wait-online --any for each group... maybe we could consider that in the future. Maybe we should recommend that bond members should be optional.
Right, I think this edge cases was not considered in the spec. But issuing a log message about it is probably a good first step. Further improvements can then be done as follow-up PRs. PTAL, I added two new isolated commits on top of the current branch (the 2nd begin some small, unrelated refactoring). |
Description
wait-online: wait for 'routable' state, if corresponding IPs are defined
Generally, we should be waiting on "routable" state (instead of "degraded") when we have static IP/dhcp4/dhcp6/RA.
Our spec defines "at least one interface MUST be up on the link layer and have received layer 3 (IP) configuration" (ignoring link-local).
We now start two separate
systemd-networkd-wait-onlineprocesses. One waiting for "carrier" & "degraded" interfaces (including the "routable" ones), not using "--any". Another one waiting just for "routable" interfaces, combined with "--any". Both blocking "network-online.target".This is an extension of #456
FR-7838
Checklist
make checksuccessfully.make check-coverage).