rhtyd closed pull request #2466: CLOUDSTACK-10305: Rare race condition in KVM
migration
URL: https://github.com/apache/cloudstack/pull/2466
This is a PR merged from a forked repository.
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diff --git
a/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtMigrateCommandWrapper.java
b/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtMigrateCommandWrapper.java
index 30f0e20ddd9..ad32759a517 100644
---
a/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtMigrateCommandWrapper.java
+++
b/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtMigrateCommandWrapper.java
@@ -172,13 +172,21 @@ Use VIR_DOMAIN_XML_SECURE (value = 1) prior to v1.0.0.
// pause vm if we meet the vm.migrate.pauseafter threshold and
not already paused
final int migratePauseAfter =
libvirtComputingResource.getMigratePauseAfter();
- if (migratePauseAfter > 0 && sleeptime > migratePauseAfter &&
dm.getInfo().state == DomainState.VIR_DOMAIN_RUNNING ) {
- s_logger.info("Pausing VM " + vmName + " due to property
vm.migrate.pauseafter setting to " + migratePauseAfter+ "ms to complete
migration");
+ if (migratePauseAfter > 0 && sleeptime > migratePauseAfter) {
+ DomainState state = null;
try {
- dm.suspend();
+ state = dm.getInfo().state;
} catch (final LibvirtException e) {
- // pause could be racy if it attempts to pause right
when vm is finished, simply warn
- s_logger.info("Failed to pause vm " + vmName + " : " +
e.getMessage());
+ s_logger.info("Couldn't get VM domain state after " +
sleeptime + "ms: " + e.getMessage());
+ }
+ if (state != null && state ==
DomainState.VIR_DOMAIN_RUNNING) {
+ try {
+ s_logger.info("Pausing VM " + vmName + " due to
property vm.migrate.pauseafter setting to " + migratePauseAfter + "ms to
complete migration");
+ dm.suspend();
+ } catch (final LibvirtException e) {
+ // pause could be racy if it attempts to pause
right when vm is finished, simply warn
+ s_logger.info("Failed to pause vm " + vmName + " :
" + e.getMessage());
+ }
}
}
}
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