On 2015/8/5 19:24, Dr. David Alan Gilbert wrote:
* zhanghailiang (zhang.zhanghaili...@huawei.com) wrote:
This is the 8th version of COLO.
Here is only COLO frame part, include: VM checkpoint,
failover, proxy API, block replication API, not include block replication.
The block part is treated as a separate series.
As usual, we provide 'basic' and 'developing' branches in github:
https://github.com/coloft/qemu/commits/colo-v1.5-basic
https://github.com/coloft/qemu/commits/colo-v1.5-developing (more features)
The 'basic' branch is exactly the same with this patch series,
We will keep this series simple as possible, just for easy review.
The extra features in colo-v1.5-developing branch:
1) Separate ram and device save/load process to reduce size of extra memory
used during checkpoint
2) Live migrate part of dirty pages to slave during sleep time.
3) You get the statistic info about checkpoint by command 'info migrate'
I'm hitting a problem that I think is due to the new global_state section
that Juan recently added; if I cause a failover I hit:
ERROR: invalid runstate transition: 'colo' -> 'prelaunch'
(on the secondary).
I think the problem is that, the global_state is only sent for any 'unusual'
states,
so in the first migration that gets done at startup, 'prelaunch' is included in
the stream
in the global state, but then for later checkpoints the global_state probably
isn't
sent.
I hacked around it by making global_state_needed return false; I guess
we need to find a better fix!
Yes, it is an known problem, i will look into it later, thanks.
Please reference to the follow link to test COLO.
http://wiki.qemu.org/Features/COLO.
COLO is a totally new feature which is still in early stage,
your comments and feedback are warmly welcomed.
NOTE:
We have decided to re-implement the colo proxy in userspace (In qemu exactly).
you can find the discussion about why & how to realize the colo proxy in qemu
from the follow link:
http://lists.nongnu.org/archive/html/qemu-devel/2015-07/msg04069.html
TODO:
1. COLO function switch on/off
2. The capability of continuous FT
3. Optimize the performance.
v8:
- Move some global variables into MigrationIncomingState and MigrationState
- Move some cleanup work form colo thread and colo incoming thread into failover
BH function and also fix the code logic for the cleanup work.
- fix the bug that colo thread and colo incoming thread possibly block in the
socket 'recv' call when do failover work.
- Optimize colo_flush_ram_cache()
- Add migration state for incoming side, we use the state to verify if migration
incoming side is in COLO state or not (Patch 5).
- Drop the patch 'COLO: Disable qdev hotplug when VM is in COLO mode', since it
is not correct.
zhanghailiang (34):
configure: Add parameter for configure to enable/disable COLO support
migration: Introduce capability 'colo' to migration
COLO: migrate colo related info to slave
colo-comm/migration: skip colo info section for special cases
migration: Add state records for migration incoming
migration: Integrate COLO checkpoint process into migration
migration: Integrate COLO checkpoint process into loadvm
COLO: Implement colo checkpoint protocol
COLO: Add a new RunState RUN_STATE_COLO
QEMUSizedBuffer: Introduce two help functions for qsb
COLO: Save VM state to slave when do checkpoint
COLO RAM: Load PVM's dirty page into SVM's RAM cache temporarily
COLO VMstate: Load VM state into qsb before restore it
arch_init: Start to trace dirty pages of SVM
COLO RAM: Flush cached RAM into SVM's memory
COLO failover: Introduce a new command to trigger a failover
COLO failover: Introduce state to record failover process
COLO failover: Implement COLO primary/secondary vm failover work
qmp event: Add event notification for COLO error
COLO failover: Don't do failover during loading VM's state
COLO: Add new command parameter 'forward_nic' 'colo_script' for net
COLO NIC: Init/remove colo nic devices when add/cleanup tap devices
tap: Make launch_script() public
COLO NIC: Implement colo nic device interface configure()
colo-nic: Handle secondary VM's original net device configure
COLO NIC: Implement colo nic init/destroy function
COLO NIC: Some init work related with proxy module
COLO: Handle nfnetlink message from proxy module
COLO: Do checkpoint according to the result of packets comparation
COLO: Improve checkpoint efficiency by do additional periodic
checkpoint
COLO: Add colo-set-checkpoint-period command
COLO NIC: Implement NIC checkpoint and failover
COLO: Implement shutdown checkpoint
COLO: Add block replication into colo process
configure | 33 +-
docs/qmp/qmp-events.txt | 16 +
hmp-commands.hx | 30 ++
hmp.c | 15 +
hmp.h | 2 +
include/exec/cpu-all.h | 1 +
include/migration/colo.h | 45 +++
include/migration/failover.h | 33 ++
include/migration/migration.h | 19 +
include/migration/qemu-file.h | 3 +-
include/net/colo-nic.h | 37 ++
include/net/net.h | 2 +
include/net/tap.h | 19 +
include/sysemu/sysemu.h | 3 +
migration/Makefile.objs | 2 +
migration/colo-comm.c | 75 ++++
migration/colo-failover.c | 83 +++++
migration/colo.c | 805 ++++++++++++++++++++++++++++++++++++++++++
migration/migration.c | 116 ++++--
migration/qemu-file-buf.c | 58 +++
migration/ram.c | 242 ++++++++++++-
migration/savevm.c | 2 +-
net/Makefile.objs | 1 +
net/colo-nic.c | 457 ++++++++++++++++++++++++
net/net.c | 2 +
net/tap.c | 90 +++--
qapi-schema.json | 58 ++-
qapi/event.json | 15 +
qemu-options.hx | 7 +
qmp-commands.hx | 42 +++
scripts/colo-proxy-script.sh | 145 ++++++++
stubs/Makefile.objs | 1 +
stubs/migration-colo.c | 58 +++
trace-events | 10 +
vl.c | 37 +-
35 files changed, 2474 insertions(+), 90 deletions(-)
create mode 100644 include/migration/colo.h
create mode 100644 include/migration/failover.h
create mode 100644 include/net/colo-nic.h
create mode 100644 migration/colo-comm.c
create mode 100644 migration/colo-failover.c
create mode 100644 migration/colo.c
create mode 100644 net/colo-nic.c
create mode 100755 scripts/colo-proxy-script.sh
create mode 100644 stubs/migration-colo.c
--
1.8.3.1
--
Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
.
