Miro Hrončok wrote: > Hi, since our Koji builds have disabled internet access, I want to do the > same, so I have more Koji consistent builds. > > I have the following in /etc/mock/site-defaults.cfg: > > config_opts['use_host_resolv'] = True # or False, no difference > config_opts['rpmbuild_networking'] = False > > The internet doesn't work (desired), but has large timeouts (undesired). > > This is especially tedious when building Python packages that use > intershpinx and they try to fetch stuff from the internet during build (it > fails, but that's OK). For each such request, the build is prolonged for ~1 > minute. I have Python packages that try to download (and fail) 10+ > intershpinx inventories during build. That's 10+ minutes waiting for > something that'll fail anyway. I've been adding hacks to sphinx calls to > make intersphinx timeout sooner, but it's unnecessary clutter in the spec. > > So I decided to test this. I've added the following to the spec: > > time curl http://example.com/ > > Here are the times: > > * my mock: real 0m56.595s Could not resolve host > * Koji: real 0m0.030s Could not resolve host > > This seems to be just about resolving hosts. See with IP address: > > time curl http://1.1.1.1/ > > * my mock: real 2m10.953s Connection timed out > * Koji: real 2m11.337s Connection timed out > > > Is there a trick to make resolving fail early? Most likely this is due to systemd-nspawn copying /etc/resolv.conf from the host to the chroot (despite the mock use_host_resolv setting). Take a look for that in an affected chroot. Assuming your issue is due to the resolv.conf, it's filed as https://bugzilla.redhat.com/1514028. Support was added in mock-1.4.10 to bind mount a file as well as a directory. The plan is to use that support to bind mount an empty resolv.conf in the chroot when use_host_resolv is true, to override the host copy that systemd-nspawn populates. It should be possible to manually override the resolv.conf now by bind mounting an empty file on /etc/resolv.conf in the chroot. I've been meaning to play with this, but have not made time to do it until just now. I thought something like this would work: touch /etc/mock/empty echo "config_opts['plugin_conf']['bind_mount_opts']['dirs'].append(('/etc/mock/empty', '/etc/resolv.conf'))" >> /etc/mock/site-defaults.cfg But testing this briefly, the host resolv.conf still ends up in the chroot. I'm probably overlooking something obvious. At least, I hope I am. -- Todd ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ No one ever went broke underestimating the taste of the American public. -- H. L. Mencken
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