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qemu: Add pause-before-switchover migration capability

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This new capability enables a pause before device state serialization so
that we can finish all block jobs without racing with the end of the
migration. The pause is indicated by "pre-switchover" state. Once we're
done QEMU enters "device" migration state.

This patch just defines the new capability and QEMU migration states and
their mapping to our job states.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Jiri Denemark 2017-10-20 10:11:32 +02:00
parent b5ec33b832
commit 6addde24be
6 changed files with 21 additions and 2 deletions
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1
src/qemu/qemu_domain.c
View File

@ -423,6 +423,7 @@ qemuDomainJobStatusToType(qemuDomainJobStatus status)
case QEMU_DOMAIN_JOB_STATUS_MIGRATING:
case QEMU_DOMAIN_JOB_STATUS_QEMU_COMPLETED:
case QEMU_DOMAIN_JOB_STATUS_POSTCOPY:
case QEMU_DOMAIN_JOB_STATUS_PAUSED:
return VIR_DOMAIN_JOB_UNBOUNDED;
case QEMU_DOMAIN_JOB_STATUS_COMPLETED:

1
src/qemu/qemu_domain.h
View File

@ -103,6 +103,7 @@ typedef enum {
QEMU_DOMAIN_JOB_STATUS_ACTIVE,
QEMU_DOMAIN_JOB_STATUS_MIGRATING,
QEMU_DOMAIN_JOB_STATUS_QEMU_COMPLETED,
QEMU_DOMAIN_JOB_STATUS_PAUSED,
QEMU_DOMAIN_JOB_STATUS_POSTCOPY,
QEMU_DOMAIN_JOB_STATUS_COMPLETED,
QEMU_DOMAIN_JOB_STATUS_FAILED,

11
src/qemu/qemu_migration.c
View File

@ -1366,6 +1366,14 @@ qemuMigrationUpdateJobType(qemuDomainJobInfoPtr jobInfo)
jobInfo->status = QEMU_DOMAIN_JOB_STATUS_CANCELED;
break;
case QEMU_MONITOR_MIGRATION_STATUS_PRE_SWITCHOVER:
jobInfo->status = QEMU_DOMAIN_JOB_STATUS_PAUSED;
break;
case QEMU_MONITOR_MIGRATION_STATUS_DEVICE:
jobInfo->status = QEMU_DOMAIN_JOB_STATUS_MIGRATING;
break;
case QEMU_MONITOR_MIGRATION_STATUS_SETUP:
case QEMU_MONITOR_MIGRATION_STATUS_ACTIVE:
case QEMU_MONITOR_MIGRATION_STATUS_CANCELLING:
@ -1459,6 +1467,7 @@ qemuMigrationCheckJobStatus(virQEMUDriverPtr driver,
case QEMU_DOMAIN_JOB_STATUS_MIGRATING:
case QEMU_DOMAIN_JOB_STATUS_QEMU_COMPLETED:
case QEMU_DOMAIN_JOB_STATUS_POSTCOPY:
case QEMU_DOMAIN_JOB_STATUS_PAUSED:
break;
}
@ -1474,6 +1483,7 @@ enum qemuMigrationCompletedFlags {
QEMU_MIGRATION_COMPLETED_ABORT_ON_ERROR = (1 << 0),
QEMU_MIGRATION_COMPLETED_CHECK_STORAGE = (1 << 1),
QEMU_MIGRATION_COMPLETED_POSTCOPY = (1 << 2),
QEMU_MIGRATION_COMPLETED_PRE_SWITCHOVER = (1 << 3),
};
@ -1534,6 +1544,7 @@ qemuMigrationCompleted(virQEMUDriverPtr driver,
switch (jobInfo->status) {
case QEMU_DOMAIN_JOB_STATUS_MIGRATING:
case QEMU_DOMAIN_JOB_STATUS_POSTCOPY:
case QEMU_DOMAIN_JOB_STATUS_PAUSED:
/* The migration was aborted by us rather than QEMU itself. */
jobInfo->status = QEMU_DOMAIN_JOB_STATUS_FAILED;
return -2;

5
src/qemu/qemu_monitor.c
View File

@ -172,14 +172,15 @@ VIR_ONCE_GLOBAL_INIT(qemuMonitor)
VIR_ENUM_IMPL(qemuMonitorMigrationStatus,
QEMU_MONITOR_MIGRATION_STATUS_LAST,
"inactive", "setup",
"active", "postcopy-active",
"active", "pre-switchover",
"device", "postcopy-active",
"completed", "failed",
"cancelling", "cancelled")
VIR_ENUM_IMPL(qemuMonitorMigrationCaps,
QEMU_MONITOR_MIGRATION_CAPS_LAST,
"xbzrle", "auto-converge", "rdma-pin-all", "events",
"postcopy-ram", "compress")
"postcopy-ram", "compress", "pause-before-switchover")
VIR_ENUM_IMPL(qemuMonitorVMStatus,
QEMU_MONITOR_VM_STATUS_LAST,

3
src/qemu/qemu_monitor.h
View File

@ -641,6 +641,8 @@ typedef enum {
QEMU_MONITOR_MIGRATION_STATUS_INACTIVE,
QEMU_MONITOR_MIGRATION_STATUS_SETUP,
QEMU_MONITOR_MIGRATION_STATUS_ACTIVE,
QEMU_MONITOR_MIGRATION_STATUS_PRE_SWITCHOVER,
QEMU_MONITOR_MIGRATION_STATUS_DEVICE,
QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY,
QEMU_MONITOR_MIGRATION_STATUS_COMPLETED,
QEMU_MONITOR_MIGRATION_STATUS_ERROR,
@ -706,6 +708,7 @@ typedef enum {
QEMU_MONITOR_MIGRATION_CAPS_EVENTS,
QEMU_MONITOR_MIGRATION_CAPS_POSTCOPY,
QEMU_MONITOR_MIGRATION_CAPS_COMPRESS,
QEMU_MONITOR_MIGRATION_CAPS_PAUSE_BEFORE_SWITCHOVER,
QEMU_MONITOR_MIGRATION_CAPS_LAST
} qemuMonitorMigrationCaps;

2
src/qemu/qemu_monitor_json.c
View File

@ -2846,6 +2846,8 @@ qemuMonitorJSONGetMigrationStatsReply(virJSONValuePtr reply,
case QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY:
case QEMU_MONITOR_MIGRATION_STATUS_COMPLETED:
case QEMU_MONITOR_MIGRATION_STATUS_CANCELLING:
case QEMU_MONITOR_MIGRATION_STATUS_PRE_SWITCHOVER:
case QEMU_MONITOR_MIGRATION_STATUS_DEVICE:
ram = virJSONValueObjectGetObject(ret, "ram");
if (!ram) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",