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

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 > > > > > >