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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/462.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/462.toml | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/462.toml b/gitlab/issues/target_missing/host_missing/accel_missing/462.toml new file mode 100644 index 000000000..30880c6a0 --- /dev/null +++ b/gitlab/issues/target_missing/host_missing/accel_missing/462.toml @@ -0,0 +1,53 @@ +id = 462 +title = "mirror: the block-job-cancel command can put qemu to the endless error loop" +state = "closed" +created_at = "2021-07-06T18:00:07.848Z" +closed_at = "2023-02-06T09:38:41.178Z" +labels = ["Storage"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/462" +host-os = "n/a" +host-arch = "n/a" +qemu-version = "n/a" +guest-os = "n/a" +guest-arch = "n/a" +description = """If the destination VM will crash (or network is down) right before the completion of the block device mirroring job (`block-job-cancel`), then there will be a possibility to put QEMU in the error loop.""" +reproduce = """1. Run both QEMU VMs: source + target. +2. On the target side prepare NBD server for blockdev mirroring process by using QMP commands similar to the one below: +``` +{"execute": "nbd-server-start", "arguments": { "addr": { "data": { "host": "::", "port": "49153" }, "type": "inet" } } } +{ "execute": "nbd-server-add", "arguments": { "device": "drive_main01", "writable": true } } +``` +3. On the source side, prepare VM for the migration and start driver mirror job: +``` +{"execute":"migrate-set-capabilities","arguments":{"capabilities":[{"capability":"pause-before-switchover","state":true}]}} +{ "execute": "drive-mirror", "arguments": { "device": "drive_main01", "mode": "existing", "job-id": "job0", "target": "nbd:127.0.0.1:49153:exportname=drive_main01", "sync": "top", "on-source-error": "stop", "on-target-error": "stop", "format": "raw", "speed": 0 } } +``` +4. On the source side wait for the `BLOCK_JOB_READY` event: +``` +{"timestamp": {"seconds": 1625586327, "microseconds": 833805}, "event": "BLOCK_JOB_READY", "data": {"device": "job0", "len": 21474836480, "offset": 21474836480, "speed": 0, "type": "mirror"}} +``` +5. Start migration on the source side: +``` +{ "execute": "migrate", "arguments": { "uri": "tcp:127.0.0.1:8091" } } +``` +6. Wait for the `pre-switchover` state of the migration: +``` +{ "execute": "query-migrate" } +{"return": {"expected-downtime": 300, "status": "pre-switchover", "setup-time": 3, "total-time": 11343, "ram": {"total": 8725020672, "postcopy-requests": 0, "dirty-sync-count": 2, "multifd-bytes": 0, "pages-per-second": 39550, "page-size": 4096, "remaining": 2871296, "mbps": 1073.7734399999999, "transferred": 963647065, "duplicate": 1899491, "dirty-pages-rate": 84, "skipped": 0, "normal-bytes": 944705536, "normal": 230641}}} +``` +7. Kill target QEMU to reproduce an issue. +8. Cancel the job on the source side: +``` +{ "execute": "block-job-cancel", "arguments": { "device": "job0" } } +``` + +Got the endless errror loop: +``` +... +{"timestamp": {"seconds": 1625586487, "microseconds": 413847}, "event": "BLOCK_JOB_ERROR", "data": {"device": "job0", "operation": "write", "action": "stop"}} +{"timestamp": {"seconds": 1625586487, "microseconds": 413865}, "event": "BLOCK_JOB_ERROR", "data": {"device": "job0", "operation": "write", "action": "stop"}} +{"timestamp": {"seconds": 1625586487, "microseconds": 413885}, "event": "BLOCK_JOB_ERROR", "data": {"device": "job0", "operation": "write", "action": "stop"}} +... +``` +Source qemu could be stopped only by using SIGKILL.""" +additional = "n/a" |