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コンテナをSpot Fleetで起動するという選択肢
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Kazuma Watanabe
December 14, 2016
Technology
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コンテナをSpot Fleetで起動するという選択肢
JAWS-UG コンテナ支部 #7
Kazuma Watanabe
December 14, 2016
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Transcript
ίϯςφΛSpot FleetͰ ্ཱͪ͛Δͱ͍͏બࢶ JAWS-UG ίϯςφࢧ෦ #7 @wata727
@wata727 • Kazuma Watanabe • Engineer in Actcat, Inc. •
AWS Solution Architect • https://twitter.com/wata727_
Containers in SideCI
Sandbox Containers • ࣮ߦڥΛίϯςφԽ͙ͯ͢͠ഁغ͢Δ • 5,000 containers / day EPDLFS
Ubuntu Host GitHub Clone Comment
Sandbox Containers • ࣮ߦڥΛίϯςφԽ͙ͯ͢͠ഁغ͢Δ • 5,000 containers / day EPDLFS
Ubuntu Host GitHub Clone Comment
Spot Fleet ?
εϙοτΠϯελϯεΛ ຊ൪ͰͬͯΔํʁ ʢ༧: 10%ʣ ※ه: 5%͘Β͍Ͱͨ͠
Amazon Spot Instance • ༧උͷEC2ίϯϐϡʔςΟϯάੑೳʹೖࡳ • ͓͍҆ʂʂʂ • ͱ͋Δc4.2xlargeͷྫ: $0.39
→ $0.06 ڻ͖ͷ
ͨͩ͠… • ೖࡳՁ֨ΛԼճΔͱམͪΔ • ߴ͘ͳͬͨΒผͷϓʔϧʢAZͱΠϯελϯε λΠϓͷΈ߹ΘͤʣͷεϙοτΠϯελϯ εΛىಈ͢Δ is ͍͠ •
ͦΜͳʹ͍ͳ͍͔…
Spot Fleet • εϙοτΠϯελϯεͷλʔήοτ༰ྔΛҡ ࣋͢ΔͨΊͷΈ • Ճྉۚແ͠ • ஈ͕ߴಅͨ͠ΒɺผͷϓʔϧͰҰ൪͍҆ε ϙοτΠϯελϯε͕ࣗಈͰ্ཱ͕ͪΔ
Spot Fleetͷઓུ • lowest: બͨ͠தͰৗʹҰ൪͍҆ϓʔϧ͔Β ىಈ͢Δɺ͍͕҆ߴಅ͢Δͱશ෦མͪΔ • diversified: ՄೳͳݶΓϓʔϧΛࢄͭͭ͠ɺ ͍҆ॱʹىಈ͢Δɺߴ͍ͱ͖͋Δ͕ɺ
Խͱߴಅ࣌ͷϦεΫܰݮ͕ظͰ͖Δ
͡Ί͔ͨ • ެࣜͷνϡʔτϦΞϧ͕͔ͳΓஸೡͳͷͰɺ ͦΕʹैͬͯ࡞ͬͯΈΔͱྑͦ͞͏ • ͦΕ͢Β໘ͳਓ • https://github.com/wata727/ tf_aws_ecs_on_spotfleet
Demo
Spot Fleet in SideCI
EC2ΛSpot Fleetʹ͠·ͨ͠
Spot Fleetʹ͢ΔͨΊʹ • ಥવΠϯελϯε͕མͪͯࠔΒͳ͍Α͏ʹ ઃܭ͢ΔʢϦτϥΠͱ͔ʣ • ىಈͨ͠Βɺ͙͢ʹαʔϏεΠϯͰ͖ΔΑ͏ ʹϢʔβσʔλͱ͔ઃఆ͓ͯ͘͠ • େମAutoScalingʹඞཁͳͷͱಉ͡ɺඞવత
ʹোʹڧ͍ઃܭʹͳΔ
҆ఆͯ͠Քಇͤ͞ΔͨΊͷTips • diversifiedͱlowestͰ͚Δ
҆ఆͯ͠Քಇͤ͞ΔͨΊͷTips • Spot Fleet ؒͷೖࡳՁ֨ʹࠩΛ͚ͭΔ • ೖࡳՁ֨Λ͑ͨ࣌ͰผͷҰ൪͍҆ϓʔϧ ͔ΒΠϯελϯε͕ىಈ͢Δ͜ͱΛར༻͢Δ • ೖࡳՁ͕͚֨҆ΕɺఆظతʹҰ൪͍҆Πϯ
ελϯεϓʔϧͷ࠶ׂΓ͕ͯߦΘΕΔ
Ձ֨҆ͨ͘͠Β͙͢མͪͳ͍ʁ • EC2ͷ՝ۚ୯Ґ1࣌ؒ͝ͱ͔ͩΒɺִ͍ؒ Ͱ࠶ىಈͨ͠Β༨ܭʹߴ͘ͳΔΜ͡Ό… • ࣮ىಈ1࣌ؒҎʹεϙοτՁ֨ͷߴಅͰڧ ੍λʔϛωʔτ͞Εͨ߹ର֎ʹͳΔ • http://aws.typepad.com/sajp/2016/11/aws- black-belt-online-seminar-amazon-ec2-spot-
instances.html
Ͱɺ҆ఆͯ͠·͔͢ʁ • ҙ֎ͱ҆ఆͯ͠·͢ • 2िؒ͘Β͍ฏؾͰੜ͖ͬͯΔΠϯελϯε ͞Μ͍·ͨ͠
ͱ͋Δm4.2xlargeͷ1
Spot Fleet ӡ༻Ͱ ϋϚͬͨ͜ͱ
ಥવͷىಈΤϥʔ • Spot FleetͰΠϯελϯε͕ىಈ͠ͳ͘ͳͬͨ • VPCͰIPΞυϨε͕֬อͰ͖ͯͳ͍…ʁ • ͦΜͳഅࣛͳͱࢥ͍ͭͭVPCΛ֬ೝ
ʊਓਓਓਓਓਓਓਓਓਓʊ ʼɹར༻ՄೳͳIP: 1ɹʻ ʉY^Y^Y^Y^Y^Y^Y^Yʉ
VPCͷIP͕ރׇ • /25Ͱ128͋ΔͣͷIP͕ރׇ • ݪҼେྔʹੜ͞Ε͍ͯͨENI (!) • TerraformͰىಈͨ͠Spot Fleetಛఆͷ݅ ԼͰ
DeleteOnTermination ͕falseͷΠϯελ ϯεΛىಈ͢Δ
PR͛·ͨ͠ • ͰϚʔδ͞ΕΔ༧ײແ͠
Ձ֨ͷҟৗͳཚߴԼ • Ұ࣌ظɺͬͯΔϓʔϧͷஈ͕ݢฒΈߴಅ ͯ͠શવ҆ఆͯ͠ΠϯελϯεΛ֬อͰ͖ͳ ͍࣌ظ͕͋ͬͨ • ΦϯσϚϯυฒྻىಈͯ྇͗͠·ͨ͠ • ถେ౷ྖબͷλΠϛϯά͕͔ؔͯͨ͠…
diversifiedͳͷʹภΔ • ͳ͔ͥdiversifiedͰىಈ͢ΔΠϯελϯε͕ಉ ͡ϓʔϧ͔Βىಈ͍ͯ͠Δ • AWSͷํʹฉ͍ͨͱ͜Ζɺࢄ͢ΔͳΒ3 Ҏ্ඞཁΒ͍͠ • ఆظతʹΠϯελϯεΛআͰ͖Εɺ࠷҆ ͷϓʔϧ͔Βىಈ͢ΔͷͰࢄ͢Δ͔…ʁ
Chaos Monkeyͷػӡ
ͪͳΈʹ • Chaos Monkey in Lambda͋ΔΑ
·ͱΊ
·ͱΊ • ͓҆͘ͳΔͷͪΖΜɺෆྀͷোΛఆ ͨ͠ઃܭΛ༨ّͳ͘͞ΕΔͷͰɺΞʔΩςΫ νϟ͕ڧਟʹͳΔ • ੲεϙοτΠϯελϯεҰ࣌తͳόον ॲཧ͖͕ͩͬͨɺSpot Fleet͕ঢ়گΛม͑ͨ •
࠷ߴͳͷͰΈΜͳ͓͏ʂʂ