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Bug #53496
closedcephadm: list-networks swallows /128 networks, breaking the orchestrator ("Filtered out host mon1: does not belong to mon public_network")
Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
% Done:
0%
Source:
Tags:
Backport:
quincy,pacific
Regression:
Yes
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
Commit 1897d1cd15af ("mgr/cephadm: update list-networks to report interface names too", backported to Pacific as 3237e485ef5f) made cephadm skip over route entries without a mask (implicit /128) in the `ip -6 route ls` output.
This breaks setups that are doing routing to the host, with IP addresses configured on the loopback interface (with /128 mask). When the mgr picks up a cephadm binary containing that commit, it stops considering mon hosts as belonging to the configured public network:
log_channel(cephadm) log [INF] : Filtered out host mon1: does not belong to mon public_network (2001:67c:295c:1001:d191:923a:8db5:46ce/128,2001:67c:295c:1001:20ef:f1ea:ea76:55a8/128,2001:67c:295c:1001:f591:a8bc:fbb5:c8a1/128)
Example `ip -6 route ls` output from affected systems looks like the following:
::1 dev lo proto kernel metric 256 pref medium
2001:67c:295c:1001:20ef:f1ea:ea76:55a8 dev lo proto kernel metric 256 pref medium
fe80::/64 dev enp3s0f0 proto kernel metric 100 pref medium
fe80::/64 dev enp3s0f1 proto kernel metric 101 pref medium
default proto bgp metric 20 pref medium
nexthop via fe80::1e34:daff:fe29:bc53 dev enp3s0f1 weight 1
nexthop via fe80::1e34:daff:fe29:c053 dev enp3s0f0 weight 1
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