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コンテナたちを計測すること ~ ロリポップ!マネージドクラウドの裏側 ~ /wip-how-t...
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KONDO Uchio
September 29, 2017
Technology
4
6.1k
コンテナたちを計測すること ~ ロリポップ!マネージドクラウドの裏側 ~ /wip-how-to-get-container-metrics
Cookpad Tech Kitchen #12
KONDO Uchio
September 29, 2017
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Transcript
dϩϦϙοϓʂϚωʔδυΫϥυͷཪଆd ۙ౻Ӊஐ࿕(.01FQBCP *OD $PPLQBE5FDI,JUDIFO ίϯςφͨͪΛܭଌ͢Δ͜ͱ
ΤϯδχΞ ۙ౻Ӊஐ࿕!VE[VSB ٕज़෦ٕज़ج൫νʔϜ ͖ͳϥʔϝϯΒʔΊΜཾ (.0ϖύϘॴଐ ͬͯΔ3VCZɺNSVCZɺίϯςφ Γ͍ͨγεςϜϓϩάϥϛϯάɺ-JOVY֦ு
ࢹɾܭଌʹ͍ͭͯɺࠓ ࢼߦࡨޡ͕ଓ͍͍ͯ·͕͢ ࠓݕূͷաఔΛڞ༗͠·͢
ϩϦϙοϓʂϚωʔδυΫϥυ IUUQTNDMPMJQPQKQ ΞϧϑΝςετத
IUUQTNDMPMJQPQKQ ΞϧϑΝςετத ˞͝ڵຯͷ͋ΔํձͰΛֻ͓͚Լ͍͞
ࢹͱ
*5ΠϯϑϥͷࢹͱɺຊॻͰ࣍ͷ௨Γఆ ٛ͠·͢ɻ োൃੜͷ༗ແΛҰఆظؒͰΓͳ֬͘ೝ͢ Δ͜ͱɻ ʰ*5Πϯϑϥࢹ<࣮ફ>ೖʱΑΓ
ࢹɾϝτϦΫεͷత wӡ༻ͱͯ͠ wαʔϏεμϯʹ͙͢ʹؾ͖͍ͨɻ·ͨɺ෮چΛૉૣ͍ͨ͘͠ wαʔϏεͷػೳͱͯ͠ wίϯςφͷෛՙঢ়گɺোঢ়ଶʹͳ͍ͬͯΔ͔൱͔ͳͲɻ·ͨͦͷ ཤྺΛͪΌΜͱՄࢹԽͯ͠ఏڙͰ͖Δͱخ͍͠ wˠͦͷͨΊʹɺϝτϦΫεΛܭଌɺࢹɺෆਖ਼ͳঢ়ଶͷ࣌Ξϥʔ τͳͲΛ͋͛ΒΕΔΑ͏ʹ͠ͳ͚ΕͳΒͳ͍ɻ
ࢹͷͨΊʹ ·ͣܭଌ͠ͳ͍ͱ͍͚ͳ͍
ࠓɺࠔ͍ͬͯΔ͜ͱ wίϯςφී௨ͷ7.ͷࢹͷΑ͏ʹ͍͔ͳ͍ͱ͜Ζ͋Δ wˠϓϩηεʢ܈ʣͳͷͰ-"ͷΑ͏ͳఆ൪ͷ͕औΕͳ͔ͬͨΓͳͲ wίϯςφϗεςΟϯάͰ͋Δ͜ͱɺ·ͨϚΠΫϩαʔϏεతͰ͋Δ͜ ͱʹΑΔɺͭͷʮʯͷ͕͋Δ
ʮίϯςφʯͷ wϚωʔδυΫϥυɺίϯςφΛར༻ͨ͠ߴूੵϓϥοτϑΥʔϜ Ͱ͋Δɻ͢ͳΘͪɺίϯςφ͕ͱͯଟ͍ɻ w͔͠ɺ'BTU$POUBJOFSΛ࠾༻͍ͯ͠ΔͳͲɺίϯςφىಈ͠ଓ͚ ΔΘ͚Ͱͳ͍ɻ·ͨɺҰͭ࣌ͷυϝΠϯʹඥͮ͘ίϯςφͷม ΘΔɻ wͨ͘͞Μ͋ΔͷͰɺूΊΔͱɺ͔Γ͘͢ݟͤΔ͕͋Δ
ʮίϯϙʔωϯτʯͷ wԿ͔ର֎ൃද͍ͯ͠Δ௨ΓɺϚωʔδυΫϥυίϯϙʔωϯτ ͕ଟ͘ɺϚΠΫϩαʔϏεతʹΈ߹Θ͍ͬͯ͞Δ wʮαΠτ͕ݟ͑ͳ͍ʯͷΑ͏ͳ߹ʹɺݪҼͱߟ͑ΒΕΔՕॴͷಛఆ ͕͘͠ɺΤϥʔτϥοΩϯάʹ՝͕͋Δɻ wϘτϧωοΫͷಛఆͳͲಉ༷
গͣͭ͠ɺ֎ງΛຒΊΔ ͦΜͳઓ͍ͷաఔΛ͠·͢
ͲΜͳ͕औΕΔ͔ʁ
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ࢀߟ wͦʔ͍ͩ͞ΜͷࢿྉΑΓɺجຊతͳγεςϜʹؔΘΔϝτϦοΫ IUUQTPVEBJIBUFOBCMPHDPNFOUSZ
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ʮDHSPVQ5FO'PSXBSEʯͰݕࡧ͢Δͱຊޠͷղઆ͕ɻɻɻ root@compute-1:~# cat /sys/fs/cgroup/cpu/$CONTAINER/cpu.stat nr_periods 140373 nr_throttled 25 throttled_time 1112602844
ωοτϫʔΫʹؔ͢ΔϝτϦΫε wݪଇɺίϯςφࣗͷ/FUXPSL/BNFTQBDFʹॴଐ͢Δ w/FUXPSL/BNFTQBDFͲ͏͠ʢࢠ͔ΒʣɺWFUIσόΠεΛܦ༝ ͯ͠௨৴͢Δ͜ͱʹͳΔ wͦͷWFUIσόΠεʹؔ͢Δز͔ͭͱΔखஈ͕͋Δ wJGUPQͷΑ͏ͳίϚϯυɺQSPDOFUEFWϑΝΠϧ wϓϩηε୯ҐͷωοτϫʔΫใQSPD1*%OFU\EFW UDQ VEQ ^
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ϦΫΤεττϥοΩϯά w͋ΔαʔόΛ௨ա͢Δ͝ͱʹಛఆͷϔομʔʹ࣌ؒΛه͍ͯ͘͠ wDG9'PSXBSEFE'PSϔομʔ w3BDLͷൃΛਅࣅͯɺϚʔΧʔΛωετ͍ͯ͘͠ͷͲ͏͔ʁ wίϯϙωϯτ͝ͱͷܦա͕࣌ؒΘ͔ΔΑ͏ʹͳΓɺϘτϧωοΫͳͲ ͕Θ͔ΔɻͦΕͦ͜(SBGBOBͳͲͰՄࢹԽͯ͠ྑ͍ wΤϥʔτϥοΩϯάʹԠ༻Ͱ͖Δʁ IUUQTQZMPOTXFCGSBNFXPSLSFBEUIFEPDTJPFOWSDDPODFQUTIUNM
DGޚࣾͷࢄτϨʔγϯάج൫ wؾʹͳΓ·͢ IUUQUFDIMJGFDPPLQBEDPNFOUSZ
σʔλΛཷΊࠐΉ
େ·͔ͳΞʔΩςΫνϟ wूΊΔˠஷΊΔˠՄࢹԽ͢Δ wσʔλͷอଘઌ1SPNFUIFVT wՄࢹԽ(SBGBOB wσʔλΤʔδΣϯτD"EWJTPSNUBJMɺࣗ࡞FYQPSUFS
1SPNFUIFVT (SBGBOB &YQPSUFS &YQPSUFS &YQPSUFS $POUBJOFS $POUBJOFS $POUBJOFS $POUBJOFS $POUBJOFS
"1*͚1SPYZ ूܭϝτϦΫεͷάϧʔϓผʹ FYQPSUFSΛ༻ҙ Ϣʔβ༷μογϡϘʔυ ʢ։ൃதʣ ӡ༻ΤϯδχΞ σΟϨΫλʔͳͲ "MFSUNBOBHFS
1SPNFUIFVTͷ࠾༻ w(PPHMFͷ#PSHNPOʹӨڹΛड͚ͨࢹπʔϧ w#PSHNPOͷհ43&ຊʹ͋Δͦ͏ wΠϯετʔϧʢجຊతʹϫϯόΠφϦΛඋ͢Ε0,ʣɺ ӡ༻ʢجຊతʹΦϯϝϞϦʴϩʔΧϧετϨʔδʣ͕༰қ wॊೈͳσʔλߏͱߴػೳͳΫΤϦ w"MFSU࿈ܞ͕༰қ w(SBGBOBͳͲՄࢹԽπʔϧ֤छFYQPSUFS͕ἧ͍ͬͯΔ
1SPNFUIFVTͱ(SBGBOBͷ࿈ܞ w(SBGBOBઆ໌ͷඞཁͳ͍΄Ͳͷఆ൪μογϡϘʔυ wެࣜʹυΩϡϝϯτ͕͋Δ wIUUQTQSPNFUIFVTJPEPDTWJTVBMJ[BUJPOHSBGBOB w1SPNFUIFVTͷΫΤϦΛͦͷ·Μ·ॻ͚ͨΓͯ͠ศརײ͕ߴ͍
Մ༻ੑͷߟ͑ํ w1SPNFUIFVT֤ϊʔυͷFYQPSUFS͔ΒσʔλΛQVMM͍ͯ͘͠ελΠ ϧΛͱ͍ͬͯΔʢDG/BHJPT /31&4BB4ܕࢹʣ wͦͷͨΊ"DUJWF"DUJWFߏΛऔΕಉ͡σʔλʹͳΓɺߏͱ ͍͏͜ͱʹͳΔɻ wSFGIUUQTHJUIVCDPNQSPNFUIFVTQSPNFUIFVTJTTVFT
4FSWJDF%JTDPWFSZ wϊʔυ͔ΒQVMM͢ΔͷͰɺ1SPNFUIFVTϊʔυ͕Ͳ͜ʹ͋Δͷ͔ͱ ͍͏ใΛ͍࣋ͬͯͳ͍ͱ͍͚ͳ͍ɻ w4FSWJDF%JTDPWFSZͷͨΊͷํ๏ࣗମ͍͔ͭ͋͘Δɻ wϑΝΠϧϕʔεɺ%/4ϕʔεɺ"840QFO4UBDLͳͲ%ZOBNJD*OGSB ͚ઃఆɺ͋Δ͍.BSBUIPO$POTVMͱ࿈ܞՄೳ
FYQPSUFSͷ֓೦ʹ͍ͭͯ wσʔλΛऔΓ͍ͨϊʔυʹɺFYQPSUFSͱݴ͏ܾ·ͬͨϑΥʔϚοτͰ σʔλΛు͖ग़͢ਓΛৗற͓ͤͯ͘͞ʢ࣮ଶIUUQ"1*ʣɻ w1SPNFUIFVTɺ4FSWJDF%JTDPWFSZΛͯ͠ɺͦͷFYQPSUFSʹΞΫη ε͠ɺఆظతʹσʔλΛಘΔ wFYQPSUFSɺطʹ࣮͞Ε͍ͯΔͷͨ͘͞Μ͋Δ͠ɺ ࣗͰ࣮͢Δ͜ͱՄೳɻ
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D"EWJTPSͰ)BDPOJXBͷϝτϦΫεΛऔΔ
D"EWJTPSͰ)BDPOJXBͷϝτϦΫεΛऔΔ
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ܭଌͷର w$16ϝϞϦར༻ͷࢹɾܭଌ wωοτϫʔΫͷࢹɾܭଌ w*0σΟεΫͷࢹɾܭଌ wϦΫΤετͷτϨʔγϯά wίϯςφϛυϧΣΞͷϩά (PPHMFπʔϧ܈ͷΤίγεςϜ͕ศརɻ ˡD"EWJTFSͰऔΕΔ ˡD"EWJTFSͰ͢ΕऔΕΔ ˡ·ͩཁݕ౼
ˡNUBJMͰָͰ͖Δ ˡώοʢOHY@NSVCZͳͲͰؤுΕͦ͏ʣ
FYQPSUFSࣗ࡞ wͱ͍͑ɺࣗ࡞Ұͭͷख (PͳͲͳΒ1SPNFUIFVTެࣜͷϥΠϒϥϦ͕͑Δ طଘׂ࣮͕ͱ๛ ͦͦɺຬ͖ͨ͢ϑΥʔϚοτ͕୯७ wIUUQTQSPNFUIFVTJPEPDTJOTUSVNFOUJOHXSJUJOH@FYQPSUFST ΨΠυΛݟͳ͕Βɺ͋ͱطଘ࣮ΛோΊͯॻ͘ͱྑͦ͞͏
FYQPSUFSͱ1SPNFUIFVTͷ࿈ܞ w4FSWJDF%JTDPWFSZͷதͰ$POTVMͱͷ૬ੑྑ͍ͱ͍͏ࢲݟ wFYQPSUFSଆͰɺ$POTVMͷTFSWJDFDIFDLΛՃˠಛఆͷαʔϏεΛ 1SPNFUIFVT͔ΒσΟεΧόϦɺ͕ඇৗʹ༰қʹͳ͍ͬͯΔ wྫ͑ҰʹෳFYQPSUFSͳͲ؆୯ͩ͠ɺFYQPSUFSͷՃআɺ ࢮ׆ࢹ$POTVMʹΔ͜ͱͰߟ͑ͳͯ͘ࡁΉ
͜ΜͳTFSWJDFఆٛΛॻ͚ wεοͱ+0*/͢Δ wศར { "service": { "name": "node_exporter", "tags": [
"development" ], "port": 9100, "checks": [ { "id": "ping", "tcp": "localhost:9100", "interval": "15s", "timeout": "1s" } ] } }
͜ͷষ·ͱΊ wʮσʔλͷஷΊͲ͜Ζʯʹ1SPNFUIFVTΛਅΜதʹਾ͑Δ w1SPNFUIFVTͷΤίγεςϜڧ͍ɻ w͍͟ͱͳΕཉ͍͠σʔλࣗͰऔΓʹߦ͘ w͜ΕΒͷͭͳ͗ʹ$POTVM͕ศར
ࠓޙΓ͍ͨ͜ͱ
ࠓޙΓ͍ͨ͜ͱ wूΊΔͱ͜Ζ·ͰԿͱ͔ͳΓͦ͏ wཷΊࠐΜͩσʔλͷ׆༻ʹ͍ͭͯ w"MFSUNBOBHFSͷ֓೦ʢࠓলུʣ wҟৗݕͷࣗಈԽɺՄࢹԽͳͲ
ҟৗݕͷࣗಈԽɺՄࢹԽ wίϯςφʹؔ͢ΔϝτϦοΫεɺ$.%#ܦ༝ͰूͰ͖Δঢ়ଶ wϓϩδΣΫτ͝ͱͷσʔλΛूΊͯԿ͔Ͱ͖ͳ͍͔ 1SPKFDUT EPNBJO $POUBJOFST $*% DPOUBJOFSJE $POUBJOFST $*%
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