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[Bug 1815993] Re: drive-backup with iscsi will cause vm disk no response
From: |
Thomas Huth |
Subject: |
[Bug 1815993] Re: drive-backup with iscsi will cause vm disk no response |
Date: |
Tue, 20 Apr 2021 08:20:12 -0000 |
The QEMU project is currently considering to move its bug tracking to another
system. For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state
back to "New" within the next 60 days, otherwise this report will be marked as
"Expired". Or mark it as "Fix Released" if the problem has been solved with a
newer version of QEMU already. Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1815993
Title:
drive-backup with iscsi will cause vm disk no response
Status in QEMU:
Incomplete
Bug description:
virsh qemu-monitor-command ${DOMAIN} '{ "execute" : "drive-backup" ,
"arguments" : { "device" : "drive-virtio-disk0" , "sync" : "top" ,
"target" : "iscsi://192.168.1.100:3260/iqn.2019-01.com.iaas/0" } }'
When the drive-backup is running, I manually crash the iscsi server(or
interrupt network, eg. iptables -j DROP).
Then after less than 1 minute:
virsh qemu-monitor-command ${DOMAIN} --pretty '{ "execute": "query-block" }'
will block and no any response, until timeout. This is still excusable.
But, the disk(drive-virtio-disk0)will occur the same situation:in vm os, the
disk will block and no any response.
In other words, when qemu and iscsi-server lose contact, It will cause
the vm unable.
---
Host: centos 7.5
qemu version: ovirt-4.2(qemu-2.12.0)
qemu command line: qemu-system-x86_64 -name guest=test,debug-threads=on -S
-object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-190-test./master-key.aes
-machine pc-i440fx-3.1,accel=kvm,usb=off,dump-guest-core=off,mem-merge=off -m
1024 -mem-prealloc -mem-path /dev/hugepages1G/libvirt/qemu/190-test -realtime
mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid
1c8611c2-a18a-4b1c-b40b-9d82040eafa4 -smbios type=1,manufacturer=IaaS
-no-user-config -nodefaults -chardev socket,id=charmonitor,fd=31,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown
-boot menu=on,strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 -drive
file=/opt/vol/sas/fb0c7c37-13e7-41fe-b3f8-f0fbaaeec7ce,format=qcow2,if=none,id=drive-virtio-disk0,cache=writeback
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=on
-drive
file=/opt/vol/sas/bde66671-536d-49cd-8b46-a4f1ea7be513,format=qcow2,if=none,id=drive-virtio-disk1,cache=writeback
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk1,id=virtio-disk1,write-cache=on
-netdev tap,fd=33,id=hostnet0,vhost=on,vhostfd=34 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=00:85:45:3e:d4:3a,bus=pci.0,addr=0x6
-chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0
-chardev socket,id=charchannel0,fd=35,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 -vnc 0.0.0.0:0,password -device
cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 -msg timestamp=on
iscsi:
yum -y install targetcli python-rtslib
systemctl start target
systemctl enable target
targetcli /iscsi create iqn.2019-01.com.iaas
targetcli /iscsi/iqn.2019-01.com.iaas/tpg1 set attribute
authentication=0 demo_mode_write_protect=0 generate_node_acls=1
targetcli /iscsi/iqn.2019-01.com.iaas/tpg1/portals create 192.168.1.100 3260
targetcli /backstores/fileio create testfile1 /backup/file1 2G
targetcli /iscsi/iqn.2019-01.com.iaas/tpg1/luns create
/backstores/fileio/testfile1
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