root@pve52:~# pveceph createmon
monmaptool: monmap file /tmp/monmap
monmaptool: generated fsid dfb8148a-a472-4097-ba2e-62ba040788e4
epoch 0
fsid dfb8148a-a472-4097-ba2e-62ba040788e4
last_changed 2017-07-21 14:22:37.088764
created 2017-07-21 14:22:37.088764
0: 192.168.100.48:6789/0 mon.0
monmaptool: writing epoch 0 to /tmp/monmap (1 monitors)
ceph-mon: set fsid to c0a78bb3-afd4-410c-845a-9db2b15690a5
*** Caught signal (Illegal instruction) **
 in thread 7fcf53aacc80 thread_name:ceph-mon
 ceph version 12.1.0 (330b5d17d66c6c05b08ebc129d3e6e8f92f73c60) luminous (dev)
 1: (()+0x82bcc2) [0x558368d1ccc2]
 2: (()+0x110c0) [0x7fcf52e650c0]
 3: (rocksdb::VersionBuilder::SaveTo(rocksdb::VersionStorageInfo*)+0x871) [0x558368eddcc1]
 4: (rocksdb::VersionSet::Recover(std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, bool)+0x26bc) [0x558368dc514c]
 5: (rocksdb::DBImpl::Recover(std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, bool, bool, bool)+0x11f) [0x558368d8c31f]
 6: (rocksdb::DB::Open(rocksdb::DBOptions const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, std::vector<rocksdb::ColumnFamilyHandle*, std::allocator<rocksdb::ColumnFamilyHandle*> >*, rocksdb::DB**)+0xe40) [0x558368d8dd90]
 7: (rocksdb::DB::Open(rocksdb::Options const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, rocksdb::DB**)+0x698) [0x558368d8f5f8]
 8: (RocksDBStore::do_open(std::ostream&, bool)+0x68e) [0x55836892600e]
 9: (RocksDBStore::create_and_open(std::ostream&)+0xd7) [0x5583689275c7]
 10: (MonitorDBStore::create_and_open(std::ostream&)+0xe3) [0x558368807c83]
 11: (main()+0x7ef) [0x5583687764af]
 12: (__libc_start_main()+0xf1) [0x7fcf502792b1]
 13: (_start()+0x2a) [0x558368804dba]
2017-07-21 14:22:37.292555 7fcf53aacc80 -1 *** Caught signal (Illegal instruction) **
 in thread 7fcf53aacc80 thread_name:ceph-mon

 ceph version 12.1.0 (330b5d17d66c6c05b08ebc129d3e6e8f92f73c60) luminous (dev)
 1: (()+0x82bcc2) [0x558368d1ccc2]
 2: (()+0x110c0) [0x7fcf52e650c0]
 3: (rocksdb::VersionBuilder::SaveTo(rocksdb::VersionStorageInfo*)+0x871) [0x558368eddcc1]
 4: (rocksdb::VersionSet::Recover(std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, bool)+0x26bc) [0x558368dc514c]
 5: (rocksdb::DBImpl::Recover(std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, bool, bool, bool)+0x11f) [0x558368d8c31f]
 6: (rocksdb::DB::Open(rocksdb::DBOptions const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, std::vector<rocksdb::ColumnFamilyHandle*, std::allocator<rocksdb::ColumnFamilyHandle*> >*, rocksdb::DB**)+0xe40) [0x558368d8dd90]
 7: (rocksdb::DB::Open(rocksdb::Options const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, rocksdb::DB**)+0x698) [0x558368d8f5f8]
 8: (RocksDBStore::do_open(std::ostream&, bool)+0x68e) [0x55836892600e]
 9: (RocksDBStore::create_and_open(std::ostream&)+0xd7) [0x5583689275c7]
 10: (MonitorDBStore::create_and_open(std::ostream&)+0xe3) [0x558368807c83]
 11: (main()+0x7ef) [0x5583687764af]
 12: (__libc_start_main()+0xf1) [0x7fcf502792b1]
 13: (_start()+0x2a) [0x558368804dba]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.

     0> 2017-07-21 14:22:37.292555 7fcf53aacc80 -1 *** Caught signal (Illegal instruction) **
 in thread 7fcf53aacc80 thread_name:ceph-mon

 ceph version 12.1.0 (330b5d17d66c6c05b08ebc129d3e6e8f92f73c60) luminous (dev)
 1: (()+0x82bcc2) [0x558368d1ccc2]
 2: (()+0x110c0) [0x7fcf52e650c0]
 3: (rocksdb::VersionBuilder::SaveTo(rocksdb::VersionStorageInfo*)+0x871) [0x558368eddcc1]
 4: (rocksdb::VersionSet::Recover(std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, bool)+0x26bc) [0x558368dc514c]
 5: (rocksdb::DBImpl::Recover(std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, bool, bool, bool)+0x11f) [0x558368d8c31f]
 6: (rocksdb::DB::Open(rocksdb::DBOptions const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::vector<rocksdb::ColumnFamilyDescriptor, std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, std::vector<rocksdb::ColumnFamilyHandle*, std::allocator<rocksdb::ColumnFamilyHandle*> >*, rocksdb::DB**)+0xe40) [0x558368d8dd90]
 7: (rocksdb::DB::Open(rocksdb::Options const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, rocksdb::DB**)+0x698) [0x558368d8f5f8]
 8: (RocksDBStore::do_open(std::ostream&, bool)+0x68e) [0x55836892600e]
 9: (RocksDBStore::create_and_open(std::ostream&)+0xd7) [0x5583689275c7]
 10: (MonitorDBStore::create_and_open(std::ostream&)+0xe3) [0x558368807c83]
 11: (main()+0x7ef) [0x5583687764af]
 12: (__libc_start_main()+0xf1) [0x7fcf502792b1]
 13: (_start()+0x2a) [0x558368804dba]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.

command 'ceph-mon --mkfs -i 0 --monmap /tmp/monmap --keyring /etc/pve/priv/ceph.mon.keyring' failed: got signal 4

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CPU: Core 2 Duo E6550 @ 2.33 GHz