How about RLIMIT_NPROC, or memory exhaustion? On Jan 17, 2013, at 12:47 AM, Matthew Anderson <matthewa@xxxxxxxxxxxx> wrote: > Hi Audrey, > > I did try your suggestion beforehand and it doesn't appear to fix the issue. > > [root@KVM04 ~]# cat /proc/sys/kernel/threads-max > 2549635 > [root@KVM04 ~]# echo 5549635 > /proc/sys/kernel/threads-max > [root@KVM04 ~]# virsh start EX03 > error: Failed to start domain EX03 > error: internal error Process exited while reading console log output: char device redirected to /dev/pts/23 > Thread::try_create(): pthread_create failed with error 11common/Thread.cc: In function 'void Thread::create(size_t)' thread 7f5ec9706960 time 2013-01-17 16:46:50.935681 > common/Thread.cc: 110: FAILED assert(ret == 0) > ceph version 0.56.1 (e4a541624df62ef353e754391cbbb707f54b16f7) > 1: (()+0x2aaa8f) [0x7f5ec6a89a8f] > 2: (SafeTimer::init()+0x95) [0x7f5ec6973575] > 3: (librados::RadosClient::connect()+0x72c) [0x7f5ec69099dc] > 4: (()+0xa0290) [0x7f5ec97c8290] > 5: (()+0x879dd) [0x7f5ec97af9dd] > 6: (()+0x87c1b) [0x7f5ec97afc1b] > 7: (()+0x87ae1) [0x7f5ec97afae1] > 8: (()+0x87d50) [0x7f5ec97afd50] > 9: (()+0xb37b2) [0x7f5ec97db7b2] > 10: (()+0x1e83eb) [0x7f5ec99103eb] > 11: (()+0x1ab54a) [0x7f5ec98d354a] > 12: (main()+0x9da) [0x7f5ec9913a3a] > 13: (__libc_start_main()+0xfd) [0x7f5ec5755cdd] > 14: (()+0x710b9) [0x7f5ec97990b9] > NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this. > terminate called after > > > > -----Original Message----- > From: Andrey Korolyov [mailto:andrey@xxxxxxx] > Sent: Thursday, 17 January 2013 4:42 PM > To: Matthew Anderson > Cc: ceph-devel@xxxxxxxxxxxxxxx > Subject: Re: Single host VM limit when using RBD > > Hi Matthew, > > Seems to a low value in /proc/sys/kernel/threads-max value. > > On Thu, Jan 17, 2013 at 12:37 PM, Matthew Anderson <matthewa@xxxxxxxxxxxx> wrote: >> I've run into a limit on the maximum number of RBD backed VM's that I'm able to run on a single host. I have 20 VM's (21 RBD volumes open) running on a single host and when booting the 21st machine I get the below error from libvirt/QEMU. I'm able to shut down a VM and start another in it's place so there seems to be a hard limit on the amount of volumes I'm able to have open. I did some googling and the error 11 from pthread_create seems to mean 'resource unavailable' so I'm probably running into a thread limit of some sort. I did try increasing the max_thread kernel option but nothing changed. I moved a few VM's to a different empty host and they start with no issues at all. >> >> This machine has 4 OSD's running on it in addition to the 20 VM's. Kernel 3.7.1. Ceph 0.56.1 and QEMU 1.3.0. There is currently 65GB of 96GB free ram and no swap. >> >> Can anyone suggest where the limit might be or anything I can do to narrow down the problem? >> >> Thanks >> -Matt >> ------------------------- >> >> Error starting domain: internal error Process exited while reading >> console log output: char device redirected to /dev/pts/23 >> Thread::try_create(): pthread_create failed with error >> 11common/Thread.cc: In function 'void Thread::create(size_t)' thread >> 7f4eb5a65960 time 2013-01-17 02:32:58.096437 >> common/Thread.cc: 110: FAILED assert(ret == 0) ceph version 0.56.1 >> (e4a541624df62ef353e754391cbbb707f54b16f7) >> 1: (()+0x2aaa8f) [0x7f4eb2de8a8f] >> 2: (SafeTimer::init()+0x95) [0x7f4eb2cd2575] >> 3: (librados::RadosClient::connect()+0x72c) [0x7f4eb2c689dc] >> 4: (()+0xa0290) [0x7f4eb5b27290] >> 5: (()+0x879dd) [0x7f4eb5b0e9dd] >> 6: (()+0x87c1b) [0x7f4eb5b0ec1b] >> 7: (()+0x87ae1) [0x7f4eb5b0eae1] >> 8: (()+0x87d50) [0x7f4eb5b0ed50] >> 9: (()+0xb37b2) [0x7f4eb5b3a7b2] >> 10: (()+0x1e83eb) [0x7f4eb5c6f3eb] >> 11: (()+0x1ab54a) [0x7f4eb5c3254a] >> 12: (main()+0x9da) [0x7f4eb5c72a3a] >> 13: (__libc_start_main()+0xfd) [0x7f4eb1ab4cdd] >> 14: (()+0x710b9) [0x7f4eb5af80b9] >> NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this. >> terminate called after >> >> Traceback (most recent call last): >> File "/usr/share/virt-manager/virtManager/asyncjob.py", line 96, in cb_wrapper >> callback(asyncjob, *args, **kwargs) >> File "/usr/share/virt-manager/virtManager/asyncjob.py", line 117, in tmpcb >> callback(*args, **kwargs) >> File "/usr/share/virt-manager/virtManager/domain.py", line 1090, in startup >> self._backend.create() >> File "/usr/lib/python2.7/dist-packages/libvirt.py", line 620, in create >> if ret == -1: raise libvirtError ('virDomainCreate() failed', >> dom=self) >> libvirtError: internal error Process exited while reading console log >> output: char device redirected to /dev/pts/23 >> Thread::try_create(): pthread_create failed with error >> 11common/Thread.cc: In function 'void Thread::create(size_t)' thread >> 7f4eb5a65960 time 2013-01-17 02:32:58.096437 >> common/Thread.cc: 110: FAILED assert(ret == 0) ceph version 0.56.1 >> (e4a541624df62ef353e754391cbbb707f54b16f7) >> 1: (()+0x2aaa8f) [0x7f4eb2de8a8f] >> 2: (SafeTimer::init()+0x95) [0x7f4eb2cd2575] >> 3: (librados::RadosClient::connect()+0x72c) [0x7f4eb2c689dc] >> 4: (()+0xa0290) [0x7f4eb5b27290] >> 5: (()+0x879dd) [0x7f4eb5b0e9dd] >> 6: (()+0x87c1b) [0x7f4eb5b0ec1b] >> 7: (()+0x87ae1) [0x7f4eb5b0eae1] >> 8: (()+0x87d50) [0x7f4eb5b0ed50] >> 9: (()+0xb37b2) [0x7f4eb5b3a7b2] >> 10: (()+0x1e83eb) [0x7f4eb5c6f3eb] >> 11: (()+0x1ab54a) [0x7f4eb5c3254a] >> 12: (main()+0x9da) [0x7f4eb5c72a3a] >> 13: (__libc_start_main()+0xfd) [0x7f4eb1ab4cdd] >> 14: (()+0x710b9) [0x7f4eb5af80b9] >> NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this. >> terminate called after >> >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" >> in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo >> info at http://vger.kernel.org/majordomo-info.html > N�����r��y���b�X��ǧv�^�){.n�+���z�]z�{ay� ʇڙ�,j��f���h���z� �w��� ���j:+v���w�j�m��������zZ+��ݢj"��!�i -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
