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CRIUをホスティングで試していく #hostingcasual / My CRIU Life...
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KONDO Uchio
March 22, 2019
Technology
0
400
CRIUをホスティングで試していく #hostingcasual / My CRIU Life in Progress
@ホスティングカジュアル #5
直近のイベント宣伝等を抜いています。
KONDO Uchio
March 22, 2019
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Transcript
ϗεςΟϯάͰ$3*6Λ͓͏ ۙ౻Ӊஐ࿕(.01FQBCP *OD ϗεςΟϯάΧδϡΞϧ <)BDPOJXB$3*6ਐḿ><ݕࡧ>
γχΞɾϓϦϯγύϧΤϯδχΞ ۙ౻ Ӊஐ࿕ / @udzura https://blog.udzura.jp/ Uchio Kondo ٕज़෦ ٕज़ج൫νʔϜ
ίϯςφ
None
ϗεςΟϯάʹಋೖ
Web Proxy Web Request Dispatcher FastContainer Runtime CMDB ❌ FastContainer
Killed 1. Check 2. Boot 3. Forward 4. Terminate
ϦΫΤετ Ұఆ࣌ؒͷఀࢭ ఀࢭޙͷ࣍ͷϦΫΤετͰ Ұ͔Βىಈ OHY@NSVCZ $POUBJOFST ݱࡏͷڍಈ
࠶ىಈͷίετ
None
Memory dump Network conf File descriptors cgroup params ...... CRIU
Target process Syscalls, /proc files ... Kernel $3*6ͰΠϝʔδΛ࡞ɺ͔ͦ͜Βىಈ ˞ࢀߟ
ϦΫΤετ ఀࢭޙͷ࣍ͷϦΫΤετͰ $3*6Πϝʔδ͔Βىಈ OHY@NSVCZ $3*6ಋೖ ඇಉظͰ Πϝʔδͷ࠶࡞ $POUBJOFST $3*6JNBHF
ޮՌଌఆ
ڥ Ұ෦ Bench(Bastion) Compute(Users) Web Proxy Core API CMDB 8
Core 51GB Mem 1 Core 2GB Mem
ܭଌ݁Ռ
ܭଌ݁Ռ DPOUFOUSPPUFYU
ܭଌ݁Ռ
ܭଌ݁Ռ 3FTQPOTF5JNF NT ✴"QBDIF͕Ϩεϙϯε Λฦͨ࣌ؒ͠Λൺֱɻ ✴"QBDIFͯ͢ͷϫʔ Χʔ্ཱ͕͕ͪΔલʹ ϨεϙϯεΛฦͤΔ͜ ͱ͕ޙʹΘ͔ͬͨ
࣮
ϦετΞ͞ΕͨϓϩηεΛɺ )BDPOJXBͷԼʹ͍ͨ͠ɻ Haconiwa sv-sv \- criu restore \- Container Haconiwa
sv-sv \- Haconiwa sv \- Container ௨ৗىಈ CRIUܦ༝ͷىಈ ϑοΫॲཧ ओʹ͜͜Ͱߦ͏ ʁʁʁ
ํ๏ TXSLNPEF SFTUPSFTJCMJOH shd: vagrant@pts/0 \_ -bash \_ sudo
../mruby/bin/mruby example/restore_child.rb \_ ../mruby/bin/mruby example/restore_child.rb <- libcriuΛݺͼग़ͨ͠mruby script \_ /usr/local/apache2/bin/httpd -DFOREGROUND -X <- ͜Ε͕ίϯςφϓϩηε \_ /usr/local/sbin/criu swrk 6 <- ͜Ε͕swrkϞʔυͰ্ཱ͕ͪͬͨαʔϏεͰɺ cr_restore_tasks() ͜͜ͰಡΜͰ͍Δ \_ sh -c ps auxf <- ֬ೝͷͨΊʹ system() ͨ͠ͷ \_ ps auxf
$3*6ͷTXSLNPEF w·ͣTXSLϞʔυͷઆ໌Ͱ͕͢ɺ͜ΕMJCDSJVͰؔΛݺͼग़ͨ͠ࡍʹɺ ΞυϗοΫʹDSJVόΠφϦͦͷͷΛݺͼग़ͯ͠αʔϏεΛ࡞͠ɺݟ͔͚ ্αʔϏεͳ͠ͰDSJVͷػೳΛ͏ϞʔυͰ͢ʢਤ̎ࠨʣɻ
DMPOF $-0/&@1"3&/5 $ ./clone-tarou parent --use-clone-parent [!] Hey, maybe a
new sibling is added 26627 pts/1 S+ 0:00 \_ ./clone-tarou parent --use-clone-parent 26628 pts/1 S+ 0:00 \_ clone-tarou tarou --use-clone-parent 26629 pts/1 S+ 0:00 \_ clone-tarou jirou [!] exit: PID=26628 [!] exit: PID=26629 <DMPOFͷ$-0/&@1"3&/5ϑϥάͷڍಈΛ؍͢Δ><ݕࡧ>
clone(fun, ..., CLONE_PARENT|CLONE_NEWPID) ɺΧʔωϧͷόʔδϣϯʹΑͬͯ ಈ͔ͳ͍Β͍͠ $3*6ͷίϝϯτΑΓ
ํ๏ FYFDDNEͬͪ͜Λ࠾༻ Haconiwa sv \- criu restore \- Container
Haconiwa sv \- haconiwa _restored \- Container FYFD XBJU wDSJVίϚϯυͰϦετΞ͔ͯ͠ΒɺҙͷϓϩάϥϜʹFYFDWF Ͱ͖Δ wFYFDલʹGPSLͨ͠ϓϩηεΛɺ৽͍͠ϓϩάϥϜଆͰXBJU Ͱ͖Δ
&YUFSOBMCJOENPVOUରԠ /path/to/pivot_root `- / (bind-mount self) `- /etc -> /other/etc
`- /home/foo -> /other2/home `- /var/log -> /other3/log wSPPUGTͷ֎ଆʹ͋ΔϑΝΠϧγεςϜSPPUΛCJOENPVOUͯ͠ɺ DISPPUQJWPU@SPPU ͔ͯ͠Β͑ΔΑ͏ʹ͢Δ͜ͱ͕Α͋͘Δ™ wͦ͏͍͏֎ଆͷϑΝΠϧγεςϜΛ$3*6͕ཧղͰ͖ΔΑ͏ʹ͢Δ ͜͜ʹpivot_root
&YUFSOBMCJOENPVOU͕͏·͍͔͘Μ
Φϓγϣϯ͗͢ΜͶΜ
Ṗʹͭͳ͕Βͳ͍ωοτϫʔΫ
ωοτϫʔΫϩοΫ͕1"5)͕ͳ͍ͷͰ ղআ͞Εͳ͍ɻ
ͯ͠Δʁ Hotstart Start from CRIU
Web Proxy Web Request Dispatcher FastContainer Runtime CMDB ❌ FastContainer
Killed 1. Check 2. Boot 3. Forward 4. Terminate 'BTU3FNPUF$IFDLͱ͍͏ NHFNΛར༻͍ͯͬͯ͠Δ͕ɺ ઃఆ͕มʁ
'BTU3FNPUF$IFDLͷύϥϝʔλௐ
None
IUUQTHJUIVCDPNIBDPOJXBIBDPOJXBQVMMT RJT"QS JT"DMPTFE ͦͷ΄͔ wࡉʑͱࠔͬͨ͜ͱ͕͕͋ͬͨɺׂͱҰ௨ΓରԠͰ͖ͨؾ͕͢Δɻ wԼهࢀߟΣοϒϖʔδͰ͢
ࠓޙ
ϦϦʔεͰ͖ΔΑ͏ؤுΔͧʙ OPEB͞Μ͕
(SFOBEJOFͱ͍͏ͷΛ࡞ͬͨ
None