[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH COLO-Frame v17 16/34] COLO failover: Introduce a new
From: |
zhanghailiang |
Subject: |
[Qemu-devel] [PATCH COLO-Frame v17 16/34] COLO failover: Introduce a new command to trigger a failover |
Date: |
Fri, 3 Jun 2016 15:52:28 +0800 |
We leave users to choose whatever heartbeat solution they want, if the heartbeat
is lost, or other errors they detect, they can use experimental command
'x_colo_lost_heartbeat' to tell COLO to do failover, COLO will do operations
accordingly.
For example, if the command is sent to the PVM, the Primary side will
exit COLO mode and take over operation. If sent to the Secondary, the
secondary will run failover work, then take over server operation to
become the new Primary.
Cc: Luiz Capitulino <address@hidden>
Cc: Eric Blake <address@hidden>
Cc: Markus Armbruster <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Li Zhijian <address@hidden>
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
---
v16:
- Fix compile broken due to missing osdep.h
v13:
- Add Reviewed-by tag
v11:
- Add more comments for x-colo-lost-heartbeat command (Eric's suggestion)
- Return 'enum' instead of 'int' for get_colo_mode() (Eric's suggestion)
v10:
- Rename command colo_lost_hearbeat to experimental 'x_colo_lost_heartbeat'
---
hmp-commands.hx | 15 +++++++++++++++
hmp.c | 8 ++++++++
hmp.h | 1 +
include/migration/colo.h | 3 +++
include/migration/failover.h | 20 ++++++++++++++++++++
migration/Makefile.objs | 2 +-
migration/colo-comm.c | 11 +++++++++++
migration/colo-failover.c | 42 ++++++++++++++++++++++++++++++++++++++++++
migration/colo.c | 1 +
qapi-schema.json | 29 +++++++++++++++++++++++++++++
qmp-commands.hx | 19 +++++++++++++++++++
stubs/migration-colo.c | 8 ++++++++
12 files changed, 158 insertions(+), 1 deletion(-)
create mode 100644 include/migration/failover.h
create mode 100644 migration/colo-failover.c
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 98b4b1a..4ea22a2 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1039,6 +1039,21 @@ migration (or once already in postcopy).
ETEXI
{
+ .name = "x_colo_lost_heartbeat",
+ .args_type = "",
+ .params = "",
+ .help = "Tell COLO that heartbeat is lost,\n\t\t\t"
+ "a failover or takeover is needed.",
+ .mhandler.cmd = hmp_x_colo_lost_heartbeat,
+ },
+
+STEXI
address@hidden x_colo_lost_heartbeat
address@hidden x_colo_lost_heartbeat
+Tell COLO that heartbeat is lost, a failover or takeover is needed.
+ETEXI
+
+ {
.name = "client_migrate_info",
.args_type =
"protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
.params = "protocol hostname port tls-port cert-subject",
diff --git a/hmp.c b/hmp.c
index 05174b9..d03f1a6 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1353,6 +1353,14 @@ void hmp_migrate_start_postcopy(Monitor *mon, const
QDict *qdict)
hmp_handle_error(mon, &err);
}
+void hmp_x_colo_lost_heartbeat(Monitor *mon, const QDict *qdict)
+{
+ Error *err = NULL;
+
+ qmp_x_colo_lost_heartbeat(&err);
+ hmp_handle_error(mon, &err);
+}
+
void hmp_set_password(Monitor *mon, const QDict *qdict)
{
const char *protocol = qdict_get_str(qdict, "protocol");
diff --git a/hmp.h b/hmp.h
index 093d65f..5d979fd 100644
--- a/hmp.h
+++ b/hmp.h
@@ -70,6 +70,7 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict
*qdict);
void hmp_migrate_set_cache_size(Monitor *mon, const QDict *qdict);
void hmp_client_migrate_info(Monitor *mon, const QDict *qdict);
void hmp_migrate_start_postcopy(Monitor *mon, const QDict *qdict);
+void hmp_x_colo_lost_heartbeat(Monitor *mon, const QDict *qdict);
void hmp_set_password(Monitor *mon, const QDict *qdict);
void hmp_expire_password(Monitor *mon, const QDict *qdict);
void hmp_eject(Monitor *mon, const QDict *qdict);
diff --git a/include/migration/colo.h b/include/migration/colo.h
index b40676c..e9ac2c3 100644
--- a/include/migration/colo.h
+++ b/include/migration/colo.h
@@ -17,6 +17,7 @@
#include "migration/migration.h"
#include "qemu/coroutine_int.h"
#include "qemu/thread.h"
+#include "qemu/main-loop.h"
bool colo_supported(void);
void colo_info_init(void);
@@ -29,4 +30,6 @@ bool migration_incoming_enable_colo(void);
void migration_incoming_exit_colo(void);
void *colo_process_incoming_thread(void *opaque);
bool migration_incoming_in_colo_state(void);
+
+COLOMode get_colo_mode(void);
#endif
diff --git a/include/migration/failover.h b/include/migration/failover.h
new file mode 100644
index 0000000..3274735
--- /dev/null
+++ b/include/migration/failover.h
@@ -0,0 +1,20 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO.,LTD.
+ * Copyright (c) 2016 FUJITSU LIMITED
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_FAILOVER_H
+#define QEMU_FAILOVER_H
+
+#include "qemu-common.h"
+
+void failover_request_active(Error **errp);
+
+#endif
diff --git a/migration/Makefile.objs b/migration/Makefile.objs
index 4bbe9ab..3f3e237 100644
--- a/migration/Makefile.objs
+++ b/migration/Makefile.objs
@@ -1,7 +1,7 @@
common-obj-y += migration.o socket.o fd.o exec.o
common-obj-y += tls.o
-common-obj-$(CONFIG_COLO) += colo.o
common-obj-y += colo-comm.o
+common-obj-$(CONFIG_COLO) += colo.o colo-failover.o
common-obj-y += vmstate.o
common-obj-y += qemu-file.o
common-obj-y += qemu-file-channel.o
diff --git a/migration/colo-comm.c b/migration/colo-comm.c
index 1a36893..716a4f7 100644
--- a/migration/colo-comm.c
+++ b/migration/colo-comm.c
@@ -21,6 +21,17 @@ typedef struct {
static COLOInfo colo_info;
+COLOMode get_colo_mode(void)
+{
+ if (migration_in_colo_state()) {
+ return COLO_MODE_PRIMARY;
+ } else if (migration_incoming_in_colo_state()) {
+ return COLO_MODE_SECONDARY;
+ } else {
+ return COLO_MODE_UNKNOWN;
+ }
+}
+
static void colo_info_pre_save(void *opaque)
{
COLOInfo *s = opaque;
diff --git a/migration/colo-failover.c b/migration/colo-failover.c
new file mode 100644
index 0000000..413675d
--- /dev/null
+++ b/migration/colo-failover.c
@@ -0,0 +1,42 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 FUJITSU LIMITED
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "migration/colo.h"
+#include "migration/failover.h"
+#include "qmp-commands.h"
+#include "qapi/qmp/qerror.h"
+
+static QEMUBH *failover_bh;
+
+static void colo_failover_bh(void *opaque)
+{
+ qemu_bh_delete(failover_bh);
+ failover_bh = NULL;
+ /*TODO: Do failover work */
+}
+
+void failover_request_active(Error **errp)
+{
+ failover_bh = qemu_bh_new(colo_failover_bh, NULL);
+ qemu_bh_schedule(failover_bh);
+}
+
+void qmp_x_colo_lost_heartbeat(Error **errp)
+{
+ if (get_colo_mode() == COLO_MODE_UNKNOWN) {
+ error_setg(errp, QERR_FEATURE_DISABLED, "colo");
+ return;
+ }
+
+ failover_request_active(errp);
+}
diff --git a/migration/colo.c b/migration/colo.c
index 47718e7..c087be8 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -18,6 +18,7 @@
#include "trace.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
+#include "migration/failover.h"
#define COLO_BUFFER_BASE_SIZE (4 * 1024 * 1024)
diff --git a/qapi-schema.json b/qapi-schema.json
index 08e64fe..07d3fcb 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -814,6 +814,35 @@
'vmstate-send', 'vmstate-size', 'vmstate-received',
'vmstate-loaded' ] }
+##
+# @COLOMode
+#
+# The colo mode
+#
+# @unknown: unknown mode
+#
+# @primary: master side
+#
+# @secondary: slave side
+#
+# Since: 2.7
+##
+{ 'enum': 'COLOMode',
+ 'data': [ 'unknown', 'primary', 'secondary'] }
+
+##
+# @x-colo-lost-heartbeat
+#
+# Tell qemu that heartbeat is lost, request it to do takeover procedures.
+# If this command is sent to the PVM, the Primary side will exit COLO mode.
+# If sent to the Secondary, the Secondary side will run failover work,
+# then takes over server operation to become the service VM.
+#
+# Since: 2.7
+##
+{ 'command': 'x-colo-lost-heartbeat' }
+
+##
# @MouseInfo:
#
# Information about a mouse device.
diff --git a/qmp-commands.hx b/qmp-commands.hx
index e70eae5..4f6efdd 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -803,6 +803,25 @@ Example:
EQMP
{
+ .name = "x-colo-lost-heartbeat",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_marshal_x_colo_lost_heartbeat,
+ },
+
+SQMP
+x-colo-lost-heartbeat
+--------------------
+
+Tell COLO that heartbeat is lost, a failover or takeover is needed.
+
+Example:
+
+-> { "execute": "x-colo-lost-heartbeat" }
+<- { "return": {} }
+
+EQMP
+
+ {
.name = "client_migrate_info",
.args_type =
"protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
.params = "protocol hostname port tls-port cert-subject",
diff --git a/stubs/migration-colo.c b/stubs/migration-colo.c
index 7b72395..7811764 100644
--- a/stubs/migration-colo.c
+++ b/stubs/migration-colo.c
@@ -12,6 +12,7 @@
#include "qemu/osdep.h"
#include "migration/colo.h"
+#include "qmp-commands.h"
bool colo_supported(void)
{
@@ -36,3 +37,10 @@ void *colo_process_incoming_thread(void *opaque)
{
return NULL;
}
+
+void qmp_x_colo_lost_heartbeat(Error **errp)
+{
+ error_setg(errp, "COLO is not supported, please rerun configure"
+ " with --enable-colo option in order to support"
+ " COLO feature");
+}
--
1.8.3.1
- [Qemu-devel] [PATCH COLO-Frame v17 03/34] COLO: migrate colo related info to secondary node, (continued)
- [Qemu-devel] [PATCH COLO-Frame v17 03/34] COLO: migrate colo related info to secondary node, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 11/34] ram/COLO: Record the dirty pages that SVM received, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 18/34] COLO: Implement failover work for Primary VM, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 22/34] COLO failover: Don't do failover during loading VM's state, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 29/34] COLO: Split qemu_savevm_state_begin out of checkpoint process, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 28/34] COLO: Separate the process of saving/loading ram and device state, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 25/34] savevm: Introduce two helper functions for save/find loadvm_handlers entry, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 19/34] COLO: Implement failover work for Secondary VM, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 24/34] COLO: Update the global runstate after going into colo state, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 05/34] migration: Integrate COLO checkpoint process into loadvm, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 16/34] COLO failover: Introduce a new command to trigger a failover,
zhanghailiang <=
- [Qemu-devel] [PATCH COLO-Frame v17 17/34] COLO failover: Introduce state to record failover process, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 31/34] net: Add notifier/callback for netdev init, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 34/34] COLO: Add block replication into colo process, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 30/34] filter-buffer: Accept zero interval, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 23/34] COLO: Process shutdown command for VM in COLO state, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 20/34] qmp event: Add COLO_EXIT event to notify users while exited from COLO, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 33/34] COLO: Control the status of buffer filters for PVM, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 32/34] COLO/filter: Add each netdev a buffer filter, zhanghailiang, 2016/06/03
- [Qemu-devel] [PATCH COLO-Frame v17 26/34] migration/savevm: Add new helpers to process the different stages of loadvm, zhanghailiang, 2016/06/03
- Re: [Qemu-devel] [PATCH COLO-Frame v17 00/34] COarse-grain LOck-stepping(COLO) Virtual Machines for Non-stop Service (FT), Dr. David Alan Gilbert, 2016/06/07