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Bug #49938
closeddaemons bind to loopback iface
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Description
There seems to be a regression in 14.2.18 whereby in some envs OSDs will bind to 127.0.0.1.
E.g. https://lists.ceph.io/hyperkitty/list/ceph-users@ceph.io/thread/3Z5J7MYZIPM3ZUTNU4LTWADXOSZVK27R/
This was probably introduced in https://github.com/ceph/ceph/commit/89321762ad4cfdd1a68cae467181bdd1a501f14d
I don't think ifa_name contains a colon.. on my machine I tested the example code at https://man7.org/linux/man-pages/man3/getifaddrs.3.html and it outputs just `lo`
# ./a.out lo AF_PACKET (17) tx_packets = 1683333517; rx_packets = 1683333517 tx_bytes = 1685898949; rx_bytes = 1685898949 eno1 AF_PACKET (17) tx_packets = 0; rx_packets = 0 tx_bytes = 0; rx_bytes = 0 ens785f0 AF_PACKET (17) tx_packets = 3787675362; rx_packets = 4154015233 tx_bytes = 3146993958; rx_bytes = 1004572644 ens785f1 AF_PACKET (17) tx_packets = 0; rx_packets = 0 tx_bytes = 0; rx_bytes = 0 eno2 AF_PACKET (17) tx_packets = 0; rx_packets = 0 tx_bytes = 0; rx_bytes = 0 lo AF_INET (2) address: <127.0.0.1> ens785f0 AF_INET (2) address: <10.116.6.8> lo AF_INET6 (10) address: <::1> ens785f0 AF_INET6 (10) address: <fd01:1458:e00:1e::100:5> ens785f0 AF_INET6 (10) address: <fe80::bdbd:76be:63fd:a4c2%ens785f0>
So we need to also explicitly skip when the iface name is exactly 'lo'.
Marking this with critical because it can take down entire clusters if operators yum update.
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