diff options
Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/1117')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/1117 | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/1117 b/gitlab/issues_text/target_missing/host_missing/accel_missing/1117 deleted file mode 100644 index 28648ef95..000000000 --- a/gitlab/issues_text/target_missing/host_missing/accel_missing/1117 +++ /dev/null @@ -1,95 +0,0 @@ -migration corrupts qcow2 metadata when "backing file: json:{" is involve -Description of problem: -the bug happens when you have a qcow2 with backing file in json format -image: 2.qcow2 -[...] -backing file: json:{"driver": "qcow2", "file": { "driver": "file", "filename": "1.qcow2"}} -backing file format: qcow2 -[...] -if you want to migrate a VM that have that kind of qcow2 attached, the migration is gonna corrupted qcow2 metadata in memory and info block will look like this -json:{\"backing\": {\"backing\": {\"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"0.qcow2\"}}, \"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"1.qcow2\"}}, \"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"2.qcow2\"}} -later if you execute blockdev-snapshot-sync, the corrupt json will be write to the new qcow2 resulting with a unusable qcow2 -Steps to reproduce: -/opt/qemu-7.0.0/bin/qemu-img create -f qcow2 0.qcow2 64G -/opt/qemu-7.0.0/bin/qemu-img create -F qcow2 -f qcow2 -b 'json:{"driver": "qcow2", "file": { "driver": "file", "filename": "0.qcow2"}}' 1.qcow2 -/opt/qemu-7.0.0/bin/qemu-img create -F qcow2 -f qcow2 -b 'json:{"driver": "qcow2", "file": { "driver": "file", "filename": "1.qcow2"}}' 2.qcow2 - -#VM1 -/opt/qemu-7.0.0/bin/qemu-system-x86_64 -enable-kvm -drive if=virtio,file=2.qcow2,node-name=drive0 -qmp stdio -display none - -#VM2 -/opt/qemu-7.0.0/bin/qemu-system-x86_64 -enable-kvm -drive if=virtio,file=2.qcow2,node-name=drive0 -qmp stdio -display none -incoming tcp::8082 - - -#VM1 INFO BLOCK -{"QMP": {"version": {"qemu": {"micro": 0, "minor": 0, "major": 7}, "package": ""}, "capabilities": ["oob"]}} -{ "execute": "qmp_capabilities" } -{"return": {}} -{ "execute": "human-monitor-command", "arguments": {'command-line': 'info block'} } -{"return": "virtio0 (drive0): 2.qcow2 (qcow2)\r\n Attached to: /machine/peripheral-anon/device[0]/virtio-backend\r\n Cache mode: writethrough\r\n Backing file: 1.qcow2 (chain depth: 2)\r\n\r\nide1-cd0: [not inserted]\r\n Attached to: /machine/unattached/device[24]\r\n Removable device: not locked, tray closed\r\n\r\nfloppy0: [not inserted]\r\n Attached to: /machine/unattached/device[17]\r\n Removable device: not locked, tray closed\r\n\r\nsd0: [not inserted]\r\n Removable device: not locked, tray closed\r\n"} - -#VM1 MIGRATE -{ "execute": "migrate", "arguments": { "uri": "tcp:localhost:8082" } } -{"return": {}} -{"timestamp": {"seconds": 1658491019, "microseconds": 233177}, "event": "STOP"} - - -#VM2 INFO BLOCK -{"QMP": {"version": {"qemu": {"micro": 0, "minor": 0, "major": 7}, "package": ""}, "capabilities": ["oob"]}} -{ "execute": "qmp_capabilities" } -{"return": {}} -{ "execute": "human-monitor-command", "arguments": {'command-line': 'info block'} } -{"return": "virtio0 (drive0): 2.qcow2 (qcow2)\r\n Attached to: /machine/peripheral-anon/device[0]/virtio-backend\r\n Cache mode: writeback\r\n Backing file: 1.qcow2 (chain depth: 2)\r\n\r\nide1-cd0: [not inserted]\r\n Attached to: /machine/unattached/device[24]\r\n Removable device: not locked, tray closed\r\n\r\nfloppy0: [not inserted]\r\n Attached to: /machine/unattached/device[17]\r\n Removable device: not locked, tray closed\r\n\r\nsd0: [not inserted]\r\n Removable device: not locked, tray closed\r\n"} - -#VM2 MIGRATE -{"timestamp": {"seconds": 1658491019, "microseconds": 249760}, "event": "RESUME"} - -#VM2 MIGRATION DONE, INFO BLOCK -{ "execute": "human-monitor-command", "arguments": {'command-line': 'info block'} } -{"return": "virtio0 (drive0): json:{\"backing\": {\"backing\": {\"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"0.qcow2\"}}, \"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"1.qcow2\"}}, \"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"2.qcow2\"}} (qcow2)\r\n Attached to: /machine/peripheral-anon/device[0]/virtio-backend\r\n Cache mode: writethrough\r\n Backing file: json:{\"backing\": {\"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"0.qcow2\"}}, \"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"1.qcow2\"}} (chain depth: 2)\r\n\r\nide1-cd0: [not inserted]\r\n Attached to: /machine/unattached/device[24]\r\n Removable device: not locked, tray closed\r\n\r\nfloppy0: [not inserted]\r\n Attached to: /machine/unattached/device[17]\r\n Removable device: not locked, tray closed\r\n\r\nsd0: [not inserted]\r\n Removable device: not locked, tray closed\r\n"} - - -#VM2 SNAPSHOT AFTER MIGRATION -{ "execute": "blockdev-snapshot-sync", "arguments": { "format": "qcow2", "snapshot-file": "3.qcow2", "node-name": "drive0", "snapshot-node-name": "drive0-snap" }} -Formatting '3.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=68719476736 backing_file=json:{"backing": {"backing": {"driver": "qcow2",, "file": {"driver": "file",, "filename": "0.qcow2"}},, "driver": "qcow2",, "file": {"driver": "file",, "filename": "1.qcow2"}},, "driver": "qcow2",, "file": {"driver": "file",, "filename": "2.qcow2"}} backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16 -{"return": {}} - - -#VM2 INFO BLOCK AFTER SNAPSHOT -{ "execute": "human-monitor-command", "arguments": {'command-line': 'info block'} } -{"return": "virtio0 (drive0-snap): 3.qcow2 (qcow2)\r\n Attached to: /machine/peripheral-anon/device[0]/virtio-backend\r\n Cache mode: writethrough\r\n Backing file: json:{\"backing\": {\"backing\": {\"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"0.qcow2\"}}, \"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"1.qcow2\"}}, \"driver\": \"qcow2\", \"file\": {\"driver\": \"file\", \"filename\": \"2.qcow2\"}} (chain depth: 3)\r\n\r\nide1-cd0: [not inserted]\r\n Attached to: /machine/unattached/device[24]\r\n Removable device: not locked, tray closed\r\n\r\nfloppy0: [not inserted]\r\n Attached to: /machine/unattached/device[17]\r\n Removable device: not locked, tray closed\r\n\r\nsd0: [not inserted]\r\n Removable device: not locked, tray closed\r\n"} - - - -#INFO -/opt/qemu-7.0.0/bin/qemu-img info --backing-chain 3.qcow2 -qemu-img: Could not open 'json:{"backing": {"backing": {"driver": "qcow2", "file": {"driver": "file", "filename": "0.qcow2"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "1.qcow2"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "2.qcow2"}}': Block format 'qcow2' does not support the option 'backing.backing.driver' -Additional information: -Even if the bug is scary it's very simple to fix it - -/opt/qemu-7.0.0/bin/qemu-img info --backing-chain 3.qcow2 -qemu-img: Could not open 'json:{"backing": {"backing": {"driver": "qcow2", "file": {"driver": "file", "filename": "0.qcow2"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "1.qcow2"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "2.qcow2"}}': Block format 'qcow2' does not support the option 'backing.backing.driver' - -root@lenovo2:/data# /opt/qemu-7.0.0/bin/qemu-img rebase -f qcow2 -F qcow2 -u -b 2.qcow2 3.qcow2 -root@lenovo2:/data# /opt/qemu-7.0.0/bin/qemu-img info --backing-chain 3.qcow2 -image: 3.qcow2 -file format: qcow2 -virtual size: 64 GiB (68719476736 bytes) -disk size: 24 KiB -cluster_size: 65536 -backing file: 2.qcow2 -backing file format: qcow2 -Format specific information: - compat: 1.1 - compression type: zlib - lazy refcounts: false - refcount bits: 16 - corrupt: false - extended l2: false - -image: 2.qcow2 -file format: qcow2 -virtual size: 64 GiB (68719476736 bytes) -disk size: 24 KiB -cluster_size: 65536 -[..........] |