[libvirt PATCH 0/2] tests: Don't assume IPv4 connectivity is available
I started looking into this after seeing
FAIL: virnetsockettest
======================
TEST: virnetsockettest
1) Socket TCP/IPv4 Accept ... libvirt: XML-RPC error : Unable to
resolve address '127.0.0.1' service '5672': Address family for hostname
not supported
FAILED
2) Socket TCP/IPv6 Accept ... OK
3) Socket TCP/IPv4+IPv6 Accept ... OK
4) Socket TCP/IPv4+IPv6 Accept ... OK
5) Socket UNIX Accept ... OK
6) Socket UNIX Addrs ... OK
7) Socket External Command /dev/zero ... OK
8) Socket External Command /dev/does-not-exist ... libvirt: XML-RPC error : End of
file while reading data: /bin/cat: /dev/does-not-exist: No such file or directory:
Input/output error
OK
9) SSH test 1 ... OK
10) SSH test 2 ... OK
11) SSH test 3 ... OK
12) SSH test 4 ... libvirt: XML-RPC error : End of
file while reading data: Cannot connect to host nosuchhost: Input/output error
OK
13) SSH test 5 ... libvirt: XML-RPC error : End of
file while reading data: : Input/output error
OK
14) SSH test 6 ... OK
15) SSH test 7 ... OK
during a Debian package build.
Full log:
https://buildd.debian.org/status/fetch.php?pkg=libvirt&arch=armel&...
Just a few days ago, this issue was discussed in
https://lists.debian.org/debian-devel/2020/07/msg00070.html
and libvirt was mentioned explicitly as a package that could be
affected by it.
Reproducing the issue is quite simple: just remove all IPv4
addresses *except* the one assigned to 'lo', and you'll see it
immediately. The problem seems to be that, in this configuration,
virNetSocketCheckProtocols() reports that both IPv4 and IPv6 are
available, but XML-RPC is apparently not happy with that.
I'm pretty bad at networking, so I'm reporting this in the hope that
someone else will figure it out O:-)
Anyway, there's another scenario that I found while digging: if you
remove *all* IPv4 addresses, *including* the one assigned to 'lo',
you get a different failure. My patch addresses this last one.
Andrea Bolognani (2):
tests: Don't assume IPv4 connectivity is available
tests: Minimize variable scope
tests/virnetsockettest.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
--
2.25.4