[lxc-devel] [lxc/lxc] 9f99a3: lxc-checkpoint: enable dirty memory tracking in cr...
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noreply at github.com
Tue Nov 15 15:56:56 UTC 2016
Branch: refs/heads/master
Home: https://github.com/lxc/lxc
Commit: 9f99a33fa97a81d395b6522fe7bd51e0ef6af454
https://github.com/lxc/lxc/commit/9f99a33fa97a81d395b6522fe7bd51e0ef6af454
Author: Adrian Reber <areber at redhat.com>
Date: 2016-11-15 (Tue, 15 Nov 2016)
Changed paths:
M src/lxc/criu.c
M src/lxc/tools/lxc_checkpoint.c
Log Message:
-----------
lxc-checkpoint: enable dirty memory tracking in criu
CRIU supports dirty memory tracking to take incremental checkpoints.
Incremental checkpoints are one way of reducing downtime during
migration. The first checkpoint dumps all the memory pages and the
second (and third, and fourth, ...) only dumps pages which have changed.
Most of the necessary code has already been implemented. This just adds
the existing functionality to lxc-checkpoint:
-p, --pre-dump Only pre-dump the memory of the container.
Container keeps on running and following
checkpoints will only dump the changes.
--predump-dir=DIR path to images from previous dump (relative to -D)
The following is an example from a container running CentOS 7 with psql
and tomcat:
# lxc-checkpoint -n c7 -D /tmp/cp -p
Container keeps on running
# du -h /tmp/cp
229M /tmp/cp
Sync initial checkpoint to destination
# rsync -a /tmp/cp host2:/tmp/
Sync file-system
# rsync -a /var/lib/lxc/c7 host2:/var/lib/lxc/
Final dump; container is stopped
# lxc-checkpoint -n c7 -D /tmp/cp --predump-dir=../cp -s
# du -h /tmp/cp2
90M /tmp/cp2
After transferring the second (incremental checkpoint) and the changes
to the container's file system the container can be restored on the
second host by pointing lxc-checkpoint to the second checkpoint
directory:
# lxc-checkpoint -n c7 -D /tmp/cp2 -r
Signed-off-by: Adrian Reber <areber at redhat.com>
Commit: a8bae5522a2dd4b5064baae13492bae981e9e3ca
https://github.com/lxc/lxc/commit/a8bae5522a2dd4b5064baae13492bae981e9e3ca
Author: Stéphane Graber <stgraber at stgraber.org>
Date: 2016-11-15 (Tue, 15 Nov 2016)
Changed paths:
M src/lxc/criu.c
M src/lxc/tools/lxc_checkpoint.c
Log Message:
-----------
Merge pull request #1299 from adrianreber/master
lxc-checkpoint: enable dirty memory tracking in criu
Compare: https://github.com/lxc/lxc/compare/748c52b52c6f...a8bae5522a2d
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