4:20 a.m.
From: Cristian Klein <cristiklein(a)gmail.com>
Signed-off-by: Cristian Klein <cristiklein(a)gmail.com>
Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com>
---
Notes:
Version 2:
- no change
tools/virsh-domain.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/virsh.pod | 11 ++++++++++-
2 files changed, 65 insertions(+), 1 deletion(-)
diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index f3f4b8b..bcb6809 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -9623,6 +9623,10 @@ static const vshCmdOptDef opts_migrate[] = {
.type = VSH_OT_BOOL,
.help = N_("abort on soft errors during migration")
},
+ {.name = "postcopy",
+ .type = VSH_OT_BOOL,
+ .help = N_("enable post-copy migration; switch to it using migrate-postcopy
command")
+ },
{.name = "migrateuri",
.type = VSH_OT_STRING,
.help = N_("migration URI, usually can be omitted")
@@ -9789,6 +9793,9 @@ doMigrate(void *opaque)
if (vshCommandOptBool(cmd, "abort-on-error"))
flags |= VIR_MIGRATE_ABORT_ON_ERROR;
+ if (vshCommandOptBool(cmd, "postcopy"))
+ flags |= VIR_MIGRATE_POSTCOPY;
+
if (flags & VIR_MIGRATE_PEER2PEER || vshCommandOptBool(cmd, "direct"))
{
if (virDomainMigrateToURI3(dom, desturi, params, nparams, flags) == 0)
ret = '0';
@@ -10092,6 +10099,48 @@ cmdMigrateGetMaxSpeed(vshControl *ctl, const vshCmd *cmd)
}
/*
+ * "migrate-postcopy" command
+ */
+static const vshCmdInfo info_migrate_postcopy[] = {
+ {.name = "help",
+ .data = N_("Switch running migration from pre-copy to post-copy")
+ },
+ {.name = "desc",
+ .data = N_("Switch running migration from pre-copy to post-copy. "
+ "The migration must have been started with --postcopy
option.")
+ },
+ {.name = NULL}
+};
+
+static const vshCmdOptDef opts_migrate_postcopy[] = {
+ {.name = "domain",
+ .type = VSH_OT_DATA,
+ .flags = VSH_OFLAG_REQ,
+ .help = N_("domain name, id or uuid")
+ },
+ {.name = NULL}
+};
+
+static bool
+cmdMigratePostCopy(vshControl *ctl, const vshCmd *cmd)
+{
+ virDomainPtr dom;
+ bool ret = false;
+
+ if (!(dom = virshCommandOptDomain(ctl, cmd, NULL)))
+ return false;
+
+ if (virDomainMigrateStartPostCopy(dom, 0) < 0)
+ goto cleanup;
+
+ ret = true;
+
+ cleanup:
+ virDomainFree(dom);
+ return ret;
+}
+
+/*
* "domdisplay" command
*/
static const vshCmdInfo info_domdisplay[] = {
@@ -12902,6 +12951,12 @@ const vshCmdDef domManagementCmds[] = {
.info = info_migrate_getspeed,
.flags = 0
},
+ {.name = "migrate-postcopy",
+ .handler = cmdMigratePostCopy,
+ .opts = opts_migrate_postcopy,
+ .info = info_migrate_postcopy,
+ .flags = 0
+ },
{.name = "numatune",
.handler = cmdNumatune,
.opts = opts_numatune,
diff --git a/tools/virsh.pod b/tools/virsh.pod
index e830c59..109c608 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1529,7 +1529,7 @@ to the I<uri> namespace is displayed instead of being
modified.
=item B<migrate> [I<--live>] [I<--offline>] [I<--direct>]
[I<--p2p> [I<--tunnelled>]]
[I<--persistent>] [I<--undefinesource>] [I<--suspend>]
[I<--copy-storage-all>]
[I<--copy-storage-inc>] [I<--change-protection>] [I<--unsafe>]
[I<--verbose>]
-[I<--compressed>] [I<--abort-on-error>] [I<--auto-converge>]
+[I<--compressed>] [I<--abort-on-error>] [I<--auto-converge>]
[I<--postcopy>]
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>]
@@ -1559,6 +1559,10 @@ 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.
+I<--postcopy> enables post-copy logic in migration, but does not
+actually start post-copy, i.e., migration is started in pre-copy mode.
+Once migration is running, the user may switch to post-copy using the
+B<migrate-postcopy> command sent from another virsh instance.
B<Note>: Individual hypervisors usually do not support all possible types of
migration. For example, QEMU does not support direct migration.
@@ -1689,6 +1693,11 @@ reject the value or convert it to the maximum value allowed.
Get the maximum migration bandwidth (in MiB/s) for a domain.
+=item B<migrate-postcopy> I<domain>
+
+Switch the current migration from pre-copy to post-copy. This is only
+supported for a migration started with I<--postcopy> option.
+
=item B<numatune> I<domain> [I<--mode> B<mode>]
[I<--nodeset> B<nodeset>]
[[I<--config>] [I<--live>] | [I<--current>]]
--
2.7.0