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virsh: selective block device migration

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Add `virsh migrate' option `--migrate-disks' that allows CLI user to
explicitly specify block devices to migrate.

Signed-off-by: Pavel Boldin <pboldin@mirantis.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Pavel Boldin 2015-06-16 01:42:11 +03:00 committed by Michal Privoznik
parent 93a19e283e
commit a4e92f9e14
2 changed files with 35 additions and 9 deletions
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23
tools/virsh-domain.c
View File

@ -9806,6 +9806,10 @@ static const vshCmdOptDef opts_migrate[] = {
.type = VSH_OT_STRING,
.help = N_("filename containing updated XML for the target")
},
{.name = "migrate-disks",
.type = VSH_OT_STRING,
.help = N_("comma separated list of disks to be migrated")
},
{.name = NULL}
};
@ -9865,6 +9869,25 @@ doMigrate(void *opaque)
VIR_MIGRATE_PARAM_DEST_NAME, opt) < 0)
goto save_error;
if (vshCommandOptStringReq(ctl, cmd, "migrate-disks", &opt) < 0)
goto out;
if (opt) {
char **val = NULL;
val = virStringSplit(opt, ",", 0);
if (virTypedParamsAddStringList(&params,
&nparams,
&maxparams,
VIR_MIGRATE_PARAM_MIGRATE_DISKS,
(const char **)val) < 0) {
VIR_FREE(val);
goto save_error;
}
VIR_FREE(val);
}
if (vshCommandOptStringReq(ctl, cmd, "xml", &opt) < 0)
goto out;
if (opt) {

21
tools/virsh.pod
View File

@ -1521,6 +1521,7 @@ to the I<uri> namespace is displayed instead of being modified.
[I<--compressed>] [I<--abort-on-error>] [I<--auto-converge>]
I<domain> I<desturi> [I<migrateuri>] [I<graphicsuri>] [I<listen-address>]
[I<dname>] [I<--timeout> B<seconds>] [I<--xml> B<file>]
[I<--migrate-disks> B<disk-list>]
Migrate domain to another host. Add I<--live> for live migration; <--p2p>
for peer-2-peer migration; I<--direct> for direct migration; or I<--tunnelled>
@ -1536,15 +1537,17 @@ with incremental copy (same base image shared between source and destination).
In both cases the disk images have to exist on destination host, the
I<--copy-storage-...> options only tell libvirt to transfer data from the
images on source host to the images found at the same place on the destination
host. I<--change-protection> enforces that no incompatible configuration
changes will be made to the domain while the migration is underway; this flag
is implicitly enabled when supported by the hypervisor, but can be explicitly
used to reject the migration if the hypervisor lacks change protection
support. I<--verbose> displays the progress of migration. I<--compressed>
activates compression of memory pages that have to be transferred repeatedly
during live migration. I<--abort-on-error> cancels the migration if a soft
error (for example I/O error) happens during the migration. I<--auto-converge>
forces convergence during live migration.
host. By default only non-shared non-readonly images are transferred. Use
I<--migrate-disks> to explicitly specify a list of disk targets to
transfer via the comma separated B<disk-list> argument. I<--change-protection>
enforces that no incompatible configuration changes will be made to the domain
while the migration is underway; this flag is implicitly enabled when supported
by the hypervisor, but can be explicitly used to reject the migration if the
hypervisor lacks change protection support. I<--verbose> displays the progress
of migration. I<--compressed> activates compression of memory pages that have
to be transferred repeatedly during live migration. I<--abort-on-error> cancels
the migration if a soft error (for example I/O error) happens during the
migration. I<--auto-converge> forces convergence during live migration.
B<Note>: Individual hypervisors usually do not support all possible types of
migration. For example, QEMU does not support direct migration.