On Tue, Mar 27, 2018 at 09:57:13AM +0200, Olaf Hering wrote:
To rescue this bug from the noise in a subthread:
If a hostname resolves to more than one address and the host currently configured itself for just IPv4, doing a bind() to some IPv6 address will fail. As a result an error is returned instead of continuing with the next item in 'runp'.
Mär 20 09:35:52 macintyre-old libvirtd[4527]: 2018-03-20 08:35:52.521+0000: 4531: error : virNetSocketNewListenTCP:389 : Unable to bind to port: Cannot assign requested address
After further debugging:
27672 16:04:46.774906 socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP) = 35 27672 16:04:46.775041 setsockopt(35, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 27672 16:04:46.775172 setsockopt(35, SOL_IPV6, IPV6_V6ONLY, [1], 4) = 0 27672 16:04:46.775302 bind(35, {sa_family=AF_INET6, sin6_port=htons(49152), inet_pton(AF_INET6, "2620:113:80c0:8000:10:161:8:197", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 EADDRNOTAVAIL (Cannot assign requested address) 27672 16:04:46.775455 gettid() = 27672 27672 16:04:46.775590 write(4, "2018-03-20 15:04:46.775+0000: 27672: error : virNetSocketNewListenTCP:389 : Unable to bind to port: Cannot assign requested address\n", 132) = 132 27672 16:04:46.775742 gettid() = 27672 27672 16:04:46.775875 write(4, "2018-03-20 15:04:46.775+0000: 27672: info : virObjectUnref:350 : OBJECT_UNREF: obj=0x7fa4bc003530\n", 98) = 98 27672 16:04:46.776026 gettid() = 27672
So for some reason libvirtd tries to bind to ipv6 even if the host does not have that ipv6 address at this point, only the link-local address. Not sure if there is a way to detect that within libvirt. Perhaps it should just move on with the runp list and try the next one?
It looks like the virNetSocketNewListenTCP only treats EAFNOSUPPORT as an error to continue with - everything else is fatal. At very least we need to add EADDRNOTAVAIL too. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|