mirror of
https://github.com/apache/cloudstack.git
synced 2025-10-26 08:42:29 +01:00
0fbf5006b8
Feature Specification: https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=95653548 Live storage migration on KVM under these conditions: From source and destination hosts within the same cluster From NFS primary storage to NFS cluster-wide primary storage Source NFS and destination NFS storage mounted on hosts In order to enable this functionality, database should be updated in order to enable live storage capacibilty for KVM, if previous conditions are met. This is due to existing conflicts between qemu and libvirt versions. This has been tested on CentOS 6 hosts. Additional notes: To use this feature set the storage_motion_supported=1 in the hypervisor_capability table for KVM. This is done by default as the feature may not work in some environments, read below. This feature of online storage+VM migration for KVM will only work with CentOS6 and possible Ubuntu as KVM hosts but not with CentOS7 due to: https://bugs.centos.org/view.php?id=14026 https://bugzilla.redhat.com/show_bug.cgi?id=1219541 On CentOS7 the error we see is: " error: unable to execute QEMU command 'migrate': this feature or command is not currently supported" (reference https://ask.openstack.org/en/question/94186/live-migration-unable-to-execute-qemu-command-migrate/). Reading through various lists looks like the migrate feature with qemu may be available with paid versions of RHEL-EV but not centos7 however this works with CentOS6. Fix for CentOS 7: Create repo file on /etc/yum.repos.d/: [qemu-kvm-rhev] name=oVirt rebuilds of qemu-kvm-rhev baseurl=http://resources.ovirt.org/pub/ovirt-3.5/rpm/el7Server/ mirrorlist=http://resources.ovirt.org/pub/yum-repo/mirrorlist-ovirt-3.5-el7Server enabled=1 skip_if_unavailable=1 gpgcheck=0 yum install qemu-kvm-common-ev-2.3.0-29.1.el7.x86_64 qemu-kvm-ev-2.3.0-29.1.el7.x86_64 qemu-img-ev-2.3.0-29.1.el7.x86_64 Reboot host Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>