Re: RBD volume not made available to Xen virtual guest on openSUSE 15.2 (with libvirt 6.0.0)

It's QEMU 4.2.1-lp152.9.6.1. I've tried updating it from the Open Build Service repos but there's too many version conflicts. Marcel On 26/10/20 9:02 pm, Ján Tomko wrote: > On a Friday in 2020, Marcel Juffermans wrote: >> Hi there, >> >> Since upgrading to openSUSE 15.2 (which includes libvirt 6.0.0) the >> virtual guests don't get their RBD disks made available to them. On >> openSUSE 15.1 (which includes libvirt 5.1.0) that worked fine. The >> XML is as follows: >> > > [...] > >> I tried to strace libvirtd. The results are as follows: >> >> On openSUSE 15.2 with libvirt 6.0.0 (not working), we see this: >> >> 1682  openat(AT_FDCWD, >> "rbd:guests/mytwotel-a:id=libvirt:key=AQCAUpBbrcaiFxAA1sztXPbkdW1L54i99oUpyA==:auth_supported=cephx\\;none", >> O_RDWR|O_CLOEXEC) = -1 ENOENT (No such file or directory) >> 1682  rt_sigprocmask(SIG_BLOCK, NULL, [BUS USR1 ALRM IO], 8) = 0 >> 1682  mmap(NULL, 1052672, PROT_READ|PROT_WRITE, >> MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f538aefd000 >> 1682  mprotect(0x7f538aefd000, 4096, PROT_NONE <unfinished ...> >> 1682  <... mprotect resumed>)           = 0 >> 1682  rt_sigprocmask(SIG_SETMASK, [BUS USR1 ALRM IO], [BUS USR1 ALRM >> IO], 8) = 0 >> 1682  rt_sigprocmask(SIG_BLOCK, NULL, [BUS USR1 ALRM IO], 8) = 0 >> 1682  mmap(NULL, 1052672, PROT_READ|PROT_WRITE, >> MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...> >> 1682  <... mmap resumed>)               = 0x7f538adfc000 >> 1682  mprotect(0x7f538adfc000, 4096, PROT_NONE <unfinished ...> >> 1682  <... mprotect resumed>)           = 0 >> 1682  rt_sigprocmask(SIG_SETMASK, [BUS USR1 ALRM IO], <unfinished ...> >> 1682  <... rt_sigprocmask resumed>[BUS USR1 ALRM IO], 8) = 0 >> 1682  write(2, "qemu-system-i386: failed to crea"..., 232 >> <unfinished ...> >> ... >> >> On the other hand, on openSUSE 15.1 with libvirt 5.1.0 (working), we >> see this: >> >> 16267 openat(AT_FDCWD, >> "rbd:guests/mytwotel-a:id=libvirt:key=AQCAUpBbrcaiFxAA1sztXPbkdW1L54i99oUpyA==:auth_supported=cephx\\;none", >> O_RDONLY|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory) >> 16267 >> stat("rbd:guests/mytwotel-a:id=libvirt:key=AQCAUpBbrcaiFxAA1sztXPbkdW1L54i99oUpyA==:auth_supported=cephx\\;none", >> 0x7fff83e2e2b0) = -1 ENOENT (No such file or directory) >> 16267 access("/usr/lib64/qemu/block-rbd.so", F_OK) = 0 >> 16267 stat("/usr/lib64/qemu/block-rbd.so", {st_mode=S_IFREG|0644, >> st_size=27448, ...}) = 0 >> 16267 openat(AT_FDCWD, "/usr/lib64/qemu/block-rbd.so", >> O_RDONLY|O_CLOEXEC) = 60 >> 16267 read(60, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 >> &\0\0\0\0\0\0"..., 832) = 832 >> 16267 fstat(60, {st_mode=S_IFREG|0644, st_size=27448, ...}) = 0 >> 16267 mmap(NULL, 2122672, PROT_READ|PROT_EXEC, >> MAP_PRIVATE|MAP_DENYWRITE, 60, 0) = 0x7f8e6030f000 >> 16267 mprotect(0x7f8e60315000, 2093056, PROT_NONE) = 0 >> 16267 mmap(0x7f8e60514000, 8192, PROT_READ|PROT_WRITE, >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 60, 0x5000) = 0x7f8e60514000 >> 16267 close(60)                         = 0 >> ... >> >> Note that the latter opens "/usr/lib64/qemu/block-rbd.so". That >> library *does* exist on openSUSE 15.2 but it doesn't seem to be used. >> > > The error message comes from QEMU, what QEMU version are you using? > > Jano > >> I've tried to update libvirt to a newer version using the Open Build >> Service repos, but then ran into so many conflicting versions that I >> gave up. >> >> At this point I'm stuck. Does anyone have an idea I can try? >> >> Many thanks, >> >> Marcel >> >> >> >> >> >>