This is what I'm doing on my CentOS 7/KVM/virtlib server: rbd create --size 20G pool/vm.mydomain.com rbd map pool/vm.mydomain.com --name client.admin virt-install --name vm.mydomain.com --ram 2048 --disk path=/dev/rbd/pool/vm.mydomain.com --vcpus 1 --os-type linux --os-variant rhel6 --network bridge=dmz --graphics none --console pty,target_type=serial --location http://repo.mydomain.com/centos/7/os/x86_64 --extra-args "ip=en0:dhcp ks=http://repo.mydomain.com/ks/ks.cfg.vm console=ttyS0 ksdevice=eth0 inst.repo=http://10.0.10.5/http://repo.mydomain.com/centos/7/os/x86_64"; And then it creates partitions, filesystems (xfs), and starts installing packages. 9 times out of 10 it hangs while installing packages. And I have no idea why. I can't kill the VM. Trying to destroy it shows: virsh # destroy vm.mydomain.com error: Failed to destroy domain vm.mydomain.com error: Failed to terminate process 19629 with SIGKILL: Device or resource busy and then virsh ls shows: virsh ls shows: 127 vm.mydomain.com in shutdown The log for this vm in /var/log/libvirt/qemu/vm.mydomain.com contains only: 2017-02-06 08:14:12.256+0000: starting up libvirt version: 2.0.0, package: 10.el7_3.2 (CentOS BuildSystem <http://bugs.centos.org>, 2016-12-06-19:53:38, c1bm.rdu2.centos.org), qemu version: 1.5.3 (qemu-kvm-1.5.3-105.el7_2.7), hostname: cpu01.mydomain.com LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -name secclass2.mydomain.com -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu SandyBridge,+vme,+f16c,+rdrand,+fsgsbase,+smep,+erms -m 2048 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 5dadf01e-b996-411f-b95f-26ce6b790bae -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-127-secclass2.mydomain./monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-reboot -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -kernel /var/lib/libvirt/boot/virtinst-vmlinuz.9Ax4zt -initrd /var/lib/libvirt/boot/virtinst-initrd.img.ALJE43 -append 'ip=en0:dhcp ks=http://util1.mydomain.com/ks/ks.cfg.vm. console=ttyS0 ksdevice=eth0 inst.repo=http://10.0.10.5/http://util1.mydomain.com/centos/7/os/x86_64 method=http://util1.mydomain.com/centos/7/os/x86_64' -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive file=/dev/rbd/security-class/secclass2.mydomain.com,format=raw,if=none,id=drive-virtio-disk0,cache=none,aio=native -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=55,id=hostnet0,vhost=on,vhostfd=57 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:87:d2:12,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-127-secclass2.mydomain./org.qemu.guest_agent.0,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 -device usb-tablet,id=input0,bus=usb.0,port=1 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on char device redirected to /dev/pts/24 (label charserial0) qemu: terminating on signal 15 from pid 23385 Any ideas? If this is a libvirt/kvm problem I'll take it to the appropriate forum but we can install into iscsi LUNs with no problem at all. Someone on IRC mentioned mkfs discard starting a zero on the rbd image which can take a long time but that should be doable in background and not hang the whole VM forever, right? Thanks for any insight you can provide! -- Tracy Reed
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