what's missing from upstream kernel containers?
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Containers in the upstream kernel(as compared to VZ kernel)
Kir Kolyshkin, Sergey Bronnikov
Who we are?
OpenVZ is an open source implementation of Linux containers
Kir Kolyshkin - leading OpenVZ for 10 years
Sergey Bronnikov - community manager of OpenVZ project
OpenVZ contribution to the Linux kernel:
2000+ commits
, FIXME: 2.6.18 vs 2.6.32, 2.6.32 vs 3.11FIXME: upstream (http://openvz.org/File:Kernel_patches_stats.png)
: namespaces (pid, ipc, network) CRIU cgroups controllers
http://openvz.org/File:Kernel_patches_stats.png
OpenVZ -- , . "", . , , network namespaces -- " ", . TCP/IP , , , , . , , .. -- "", OpenVZ.
, -. linux-kernel@ , , , , , , , -- , , . "" OpenVZ . , "" , ( , ).http://k001.livejournal.com/774225.html
OpenVZ ? ! , (, , 1700 , , , , ).
, PID namespace. , , , , , , . , , , , , -- , . , , . , , , . , , , . , , , -- , , .
? ? ? , -- OpenVZ , , , OpenVZ, . ? , , . , , 60 80% -- ( 20-30%, ).http://ru-openvz.livejournal.com/1970.html
Is OpenVZ kernel upstreamed yet?
Yes!
About 60%
Biggest pieces:NET and PID namespaces
Memory cgroup, device cgroup
CRIU
NFS virtualization
Virtuozzo kernel changes (LOC)
This slide show amount of patchset for three
Things we (still) need to add 1/2
Ploop and related ext4 changes
Memory management and accountingbackport of kmemcg
idle memory tracking (for vcmmd)
network buffers memory accounting
OOM killer virtualization
/sys and /proc virtualization
Things we (still) need to add 2/2
Network: venet, iptables (marks)
FUSE upstream backports
Printk virtualization
/dev/console virtualization
Time namespace (for monotonic timers wrt migration)
Misc legacy (vziolimit, vzlist, vzredir, vznetstat, beancounters...) Beancounters: numiptent, numfile, numproc
Any patches? Questions?
Kir Kolyshkin [email protected], @kolyshkinSergey Bronnikov [email protected], @estet
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HEAD16
; Patchset
RHEL5 (2.6.18)264641
RHEL6 (2.6.32)202746
RHEL7 (3.10)66324
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Click to edit the outline text formatSecond Outline LevelThird Outline LevelFourth Outline LevelFifth Outline LevelSixth Outline Level
Seventh Outline LevelBody Level One
Body Level Two
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Click to edit the outline text formatSecond Outline LevelThird Outline LevelFourth Outline LevelFifth Outline LevelSixth Outline Level
Seventh Outline LevelBody Level One
Body Level Two
Body Level Three
Body Level Four
Body Level Five