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authorChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
commit3e4c5a6261770bced301b5e74233e7866166ea5b (patch)
tree9379fddaba693ef8a045da06efee8529baa5f6f4 /gitlab/issues_text/target_missing/host_missing/accel_missing/1183
parente5634e2806195bee44407853c4bf8776f7abfa4f (diff)
downloadqemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.tar.gz
qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.zip
clean up repository
Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/1183')
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diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/1183 b/gitlab/issues_text/target_missing/host_missing/accel_missing/1183
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@@ -1,131 +0,0 @@
-KVM crash due to qcow2 out of space condition during virsh-snapshot creation
-Description of problem:
-virsh snapshot failed due to out of space condition (into the qcow2 image ?)
-
-libvirt log:
-
-```
-2022-08-27T06:41:41.164368Z qemu-kvm-one: terminating on signal 15 from pid 1782 (/usr/sbin/libvirtd)
-2022-08-27T06:41:41.172667Z qemu-kvm-one: Failed to flush the L2 table cache: Input/output error
-2022-08-27T06:41:41.172692Z qemu-kvm-one: Failed to flush the refcount block cache: Input/output error
-```
-Steps to reproduce:
-1. not possible for that moment - i did resize/increase the qcow2 image - 
-now its running again.
-Additional information:
-as i saw - there was a very old qemu-snapshot, which was not properly deleted.
-After removing this snapshot, i did reszie the image.
-I do suppose, this could be one reason the image (qcow2) got full ?
-
-Because all is THIN  i was not aware of it (fs level ok, storage layer ok).
-Is there any tool, how free space in a thin qcow2 file can be monitored ?
-
-
-
-```
-PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin \
-HOME=/var/lib/libvirt/qemu/domain-13-one-89 \
-XDG_DATA_HOME=/var/lib/libvirt/qemu/domain-13-one-89/.local/share \
-XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain-13-one-89/.cache \
-XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain-13-one-89/.config \
-QEMU_AUDIO_DRV=none \
-/usr/bin/qemu-kvm-one \
--name guest=one-89,debug-threads=on \
--S \
--object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-13-one-89/master-key.aes \
--machine pc-i440fx-rhel7.6.0,accel=kvm,usb=off,dump-guest-core=off \
--cpu qemu64 \
--m 8192 \
--overcommit mem-lock=off \
--smp 4,sockets=4,cores=1,threads=1 \
--uuid 8c920c7f-f687-4c47-bfc7-671425c7436b \
--no-user-config \
--nodefaults \
--chardev socket,id=charmonitor,fd=40,server,nowait \
--mon chardev=charmonitor,id=monitor,mode=control \
--rtc base=utc \
--no-shutdown \
--boot strict=on \
--device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
--device virtio-scsi-pci,id=scsi0,num_queues=1,bus=pci.0,addr=0x4 \
--device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 \
--blockdev '{"driver":"file","filename":"/var/lib/one//xxxx/disk.0","aio":"threads","node-name":"libvirt-3-storage","cache":{"direct":false,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
--blockdev '{"node-name":"libvirt-3-format","read-only":false,"discard":"unmap","cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-3-storage","backing":null}' \
--device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,device_id=drive-scsi0-0-0-0,drive=libvirt-3-format,id=scsi0-0-0-0,bootindex=1,write-cache=off \
--blockdev '{"driver":"file","filename":"/var/lib/one//xxxx/disk.1","aio":"threads","node-name":"libvirt-2-storage","cache":{"direct":false,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
--blockdev '{"node-name":"libvirt-2-format","read-only":false,"discard":"unmap","cache":{"direct":false,"no-flush":false},"driver":"qcow2","file":"libvirt-2-storage","backing":null}' \
--device scsi-hd,bus=scsi0.0,channel=0,scsi-id=1,lun=0,device_id=drive-scsi0-0-1-0,drive=libvirt-2-format,id=scsi0-0-1-0,write-cache=off \
--blockdev '{"driver":"file","filename":"/var/lib/one//xxxx/disk.2","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
--blockdev '{"node-name":"libvirt-1-format","read-only":true,"driver":"raw","file":"libvirt-1-storage"}' \
--device ide-cd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0 \
--netdev tap,fd=42,id=hostnet0 \
--device e1000,netdev=hostnet0,id=net0,mac=02:00:c0:a8:02:17,bus=pci.0,addr=0x3 \
--chardev socket,id=charchannel0,fd=43,server,nowait \
--device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 \
--vnc 0.0.0.0:89 \
--device cirrus-vga,id=video0,bus=pci.0,addr=0x2 \
--device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 \
--sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
--msg timestamp=on
-```
-
-as the time of the crash the qcow2 status was:
-(so i'm not sure the issue is about a space problem or a bug in qemu):
-
-```
-qemu-img info xxx/0/xxx
-image: xxx/0/xxx
-file format: qcow2
-virtual size: 1.46 TiB (1610612736000 bytes)
-disk size: 988 GiB
-cluster_size: 65536
-Snapshot list:
-ID        TAG               VM SIZE                DATE     VM CLOCK     ICOUNT
-112       snap-111              0 B 2022-03-11 01:59:15 49:07:53.846
-282       snap-281              0 B 2022-08-20 01:59:17538:16:30.416
-283       snap-282              0 B 2022-08-21 01:59:16562:10:40.759
-284       snap-283              0 B 2022-08-22 01:59:16585:59:16.170
-285       snap-284              0 B 2022-08-23 01:59:16609:51:44.825
-286       snap-285              0 B 2022-08-24 01:59:16633:45:32.243
-287       snap-286              0 B 2022-08-25 01:59:16657:36:44.718
-288       snap-287              0 B 2022-08-26 01:59:16681:29:00.793
-Format specific information:
-    compat: 1.1
-    compression type: zlib
-    lazy refcounts: false
-    refcount bits: 16
-    corrupt: false
-    extended l2: false
-root@proxpve1:~#  qemu-img check xxxx/0/xxx
-No errors were found on the image.
-15252433/24576000 = 62.06% allocated, 6.32% fragmented, 0.00% compressed clusters
-Image end offset: 1062936117248
-
-1rst (OS) Disk on the VM:
-------------------------------------------
-file format: qcow2
-virtual size: 100 GiB (107374182400 bytes)
-disk size: 190 GiB
-cluster_size: 65536
-Snapshot list:
-ID        TAG               VM SIZE                DATE     VM CLOCK     ICOUNT
-282       snap-281          7.66 GiB 2022-08-20 01:59:17538:16:30.416
-283       snap-282          7.6 GiB 2022-08-21 01:59:16562:10:40.759
-284       snap-283          7.62 GiB 2022-08-22 01:59:16585:59:16.170
-285       snap-284          7.65 GiB 2022-08-23 01:59:16609:51:44.825
-286       snap-285          7.62 GiB 2022-08-24 01:59:16633:45:32.243
-287       snap-286          7.63 GiB 2022-08-25 01:59:16657:36:44.718
-288       snap-287          7.65 GiB 2022-08-26 01:59:16681:29:00.793
-Format specific information:
-    compat: 1.1
-    compression type: zlib
-    lazy refcounts: false
-    refcount bits: 16
-    corrupt: false
-    extended l2: false
-
-
-No errors were found on the image.
-782257/1638400 = 47.75% allocated, 22.16% fragmented, 0.00% compressed clusters
-Image end offset: 315680292864
-```