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TerraformとCloudFormationどちらを採用すべき?
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Fukazawa Shun
May 19, 2021
Programming
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19k
TerraformとCloudFormationどちらを採用すべき?
AKIBA.AWS ONLINE #03 -IaC を語りたい 編-
での登壇資料
Fukazawa Shun
May 19, 2021
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Transcript
None
5FSSBGPSNͱ$MPVE'PSNBUJPO ͲͪΒΛ࠾༻͖͢ʁ ਂᖒ ढ़ʢ'VLB[BXB4IVOʣ "84ࣄۀຊ෦ίϯαϧςΟϯά෦
3 ⾃⼰紹介 ਂᖒ ढ़ʢFukazawa Shunʣ クラスメソッド株式会社 AWS事業本部コンサルティング部 @shun_quartet #AKIBAAWS
4 ϓϩϩʔά 5FSSBGPSN PS $MPVEGPSNBUJPO
5 جຊతͳબఆ݅ͱͯ͠ • ·ͣબఆʹ͓͚Δલఏͱͯ͠ʜ • ೲͱͯ͠ࢦఆ͕͋Δ͔ • ϝϯόʔͰϝϯςՄೳ͔ • ෳࡶͳͷɺ࠷ઌͳͷ͕ྑ͍ͷͰͳ͍
• ࠾༻ٕͨ͠ज़ͷಛੑΛνʔϜͰཧղ͠ӡ༻͍͚ͯ͠Δ͔
6 両者の違いって︖ 基本的な違い
7 $MPVEGPSNBUJPOʹ͍ͭͯ • "84͕ఏڙ • :BNM͔KTPOͰهड़ • "84্Ͱ࣮ߦ • *".ϩʔϧΛ༻ͨ͠ηΩϡΞͳೝূ
Ec2Instance: Type: AWS::EC2::Instance Properties: ImageId: Fn::FindInMap: - "RegionMap" - Ref: "AWS::Region" - "AMI"
8 5FSSBGPSNʹ͍ͭͯ • )BTIJ$PSQ͕ఏڙ • )$-Ͱهड़ • ϩʔΧϧ1$ͷϚγϯ্Ͱ࣮ߦ • ΩʔͷཧΛݕ౼͢Δඞཁ͕͋Δ
• &$ͷ"84αʔϏε্Ͱͷ࣮ߦεΠονϩʔϧ ͰηΩϡΞͳೝূ͕Մೳ resource "aws_instance" "web" { ami = data.aws_ami.ubuntu.id instance_type = "t3.micro" tags = { Name = "HelloWorld" } }
9 ྆ऀͷҧ͍ͬͯʁ ྆ऀͷ۩ମతͳ ಛΛݟ͍͖ͯ·͠ΐ͏ʂ
10 両者の違いって︖ 異なるリージョンへのデプロイ
11 ҟͳΔϦʔδϣϯͷσϓϩΠ • 4UBDL4FUT IUUQTEPDTBXTBNB[PODPNKB@KQ"84$MPVE'PSNBUJPOMBUFTU6TFS(VJEFTUBDLTFUTDPODFQUTIUNM • ҟͳΔϦʔδϣϯʹϦιʔεΛ࡞ߋ৽আ͢Δػೳ • ҟͳΔΞΧϯτʹσϓϩΠՄೳ Region
Region Region Stack sets stack stack stack アカウントA アカウントB
12 ҟͳΔϦʔδϣϯͷσϓϩΠ • ҟͳΔ1SPWJEFSΛ༻͍Δ IUUQTXXXUFSSBGPSNJPEPDTQSPWJEFSTJOEFYIUNM Region Region Region Provider A
Provider B Provider C provider aws { region = "ap-northeast-1” } provider aws { region = "us-east-1" alias = "use1" } resource "aws_instance" "web" { 〜〜〜 } resource "aws_instance" "web_use1" { provider = aws.use1 〜〜〜 }
13 ҟͳΔϦʔδϣϯͷσϓϩΠ • "84Ͱͷ*B$Ͱ͋Ε$MPVEGPSNBUJPOͷํ͕ҟͳΔϦʔ δϣϯ ΞΧϯτʹσϓϩΠ͍͢͠ • ϚϧνϦʔδϣϯγεςϜͰͳͯ͘ηΩϡϦςΟͷ߹Ͱ"84$POGJH"NB[PO (VBSE%VUZΛશͯͷϦʔδϣϯʹల։͍ͨ͠ͱ͍ͬͨधཁʹରԠ͍͢͠ •
5FSSBGPSN1SPWJEFSΛΓସ͑Δ͜ͱ͕Ͱ͖ΔނͷϝϦοτɻ
14 異なるIaaSへのデプロイ 異なるIaaSへのデプロイ
15 ҟͳΔ*BB4ͷσϓϩΠ • $MPVEGPSNBUJPO"84ͷαʔϏεͷͨΊଞͷϓ ϥοτϑΥʔϜͷσϓϩΠରԠ͍ͯ͠ͳ͍ • 5FSSBGPSN1SPWJEFSΛΓସ͑Δ͜ͱͰҟͳΔ *BB4ʹσϓϩΠ͕ߦ͑Δ • "84
• ($1 • "[VSF ʜ
16 差分検出 差分検出
17 ࠩݕग़ • *B$Ͱཧ͍ͯ͠Δͷͷɺ͍ͭख࡞ۀͰڥΛमਖ਼ ͯ͠͠·͏͜ͱΑ͋͘Δ • ڥͱίʔυ͕ဃͯ͠͠·ͬͨࡍͷݕग़ͲͷΑ͏ʹߦ͏͔ʁ
18 ࠩݕग़ • $MPVEGPSNBUJPOͷ߹ɺυϦϑτݕग़ͱ͍͏ػೳ͕͋Δ IUUQTEPDTBXTBNB[PODPNKB@KQ"84$MPVE'PSNBUJPOMBUFTU6TFS(VJEFEFUFDUESJGUTUBDLIUNM • ڥͱίʔυͷဃΛࣗಈͰݕग़͢Δػೳ • $POGJHϧʔϧͱΈ߹ΘͤͨΓͯ͠௨Մೳ Stack
VPC NAT gateway Instance Instance ≒ AWS Config EventBridge
19 ࠩݕग़ • 5FSSBGPSNͷ߹ɺ1MBOίϚϯυΛ࣮ߦͯ͠4UBUFͱͷࠩ Λൺֱ͢Δ IUUQTXXXUFSSBGPSNJPEPDTDMJDPNNBOETQMBOIUNM • ΦϓγϣϯΛ͚Δ͜ͱͰίʔϧόοΫ͔Βࠩͷݕग़͕Մೳ VPC NAT
gateway Instance Instance ≒ $ terraform plan -detailed-exitcode
20 ࠩݕग़ • 5FSSBGPSNͷ߹ɺࣗಈԽ͍ͨ͠߹࡞ΓࠐΈ͕ඞཁʹͳΔ • $MPVEGPSNBUJPOͩͱࠩݕग़"84ͷϚωʔδυαʔϏε ʹدͤΔ͜ͱ͕Ͱ͖Δ
21 両者の違いって︖ ロジック
22 ϩδοΫ • ಉ͡ϦιʔεΛෳ࡞͍ͨ͠߹ɺΓมʹΑͬͯΞ ΫγϣϯΛม͍͑ͨέʔε͋Δ • ྫɿ มʹ֨ೲ͞Ε͍ͯΔ";͚ͩ4VCOFUΛ࡞͍ͨ͠ • ϩδοΫͷ࣮ͲͷΑ͏ʹߦ͏͔
23 ϩδοΫ • $MPVEGPSNBUJPOͷ߹ • $POEJUJPOTηΫγϣϯΛ༻͢Δ • ༻Մೳͳؔ • 'O"OE
• 'O&RVBMT • 'O*G • 'O/PU • 'O0S Description: "Template.” Parameters: EnvType: Type: String AllowedValues: - prod - test Conditions: CreateProdResources: !Equals - !Ref EnvType - prod Resources: 〜〜〜 Outputs: 〜〜〜
24 ϩδοΫ • 5FSSBGPSNͷ߹ • ߏମΛ༻͍ͨ܁Γฦ͠ॲཧ • ࡾ߲ԋࢉࢠ • ΈࠐΈؔ
• ͍ΘΏΔϓϩάϥϜݴޠʹ ͍ۙهड़ • ذॲཧͳ͍ dynamic "origin_group" { for_each = var.load_balancer_origin_groups content { name = origin_group.key dynamic "origin" { for_each = origin_group.value.origins content { hostname = origin.value.hostname } } } } variable "load_balancer_origin_groups" { type = map(object({ origins = set(object({ hostname = string })) })) }
25 排他制御 排他制御
26 ഉଞ੍ޚ • ಉ࣮࣌ߦ͞Εͨ࣌ʹ4UBDLPS4UBUF্͕ॻ͖͞Εͯ͠·͏͜ͱ ͳ͍ͷ͔ʁ • ෳਓͰӡ༻͍ͯ͠ΔࡍʹॏཁͳϙΠϯτɻɻ
27 ഉଞ੍ޚ • $MPVEGPSNBUJPOͷ߹ • ࣮ߦத$3&"5&@*/@130(3&44εςʔλεʹͳΔ • $3&"5&@*/@130(3&44ͷ࠷தมߋෆՄ
28 ഉଞ੍ޚ • 5FSSBGPSNͷ߹ • 4UBUFΛͲ͜ʹஔ͘ͷ͔ʹΑͬͯҟͳΔ • IUUQTXXXUFSSBGPSNJPEPDTMBOHVBHFTFUUJOHTCBDLFOETJOEF YIUNM •
%ZOBNP%#MPDLΛ༻͍Δ͜ͱ͕Ͱ͖Εഉଞ੍ޚՄೳ • IUUQTXXXUFSSBGPSNJPEPDTMBOHVBHFTUBUFMPDLJOHIUNM
29 両者の違いって︖ バージョン管理
30 όʔδϣϯཧ • όʔδϣϯΛ͏·͘ཧ͢Δඞཁ͕͋Δ • ϝϯόʔͷ࣮ߦڥࠩҧ • ࠷৽ͷैͱݱߦҡ࣋
31 όʔδϣϯཧ • $MPVEGPSNBUJPOͷ߹ • "84ͷαʔϏεͳͷͰ͍ΘΏΔόʔδϣϯͷ֓೦͕ͳ͍ • ςϯϓϨʔτόʔδϣϯଘࡏ͢Δͷͷɺݱ࣌Ͱ͔͠ ͳ͍ͷͰόʔδϣϯཧͷඞཁ͕ͳ͍ •
IUUQTEPDTBXTBNB[PODPNKB@KQ"84$MPVE'PSNBUJPOMBUFTU6 TFS(VJEFGPSNBUWFSTJPOTUSVDUVSFIUNM
32 όʔδϣϯཧ • 5FSSBGPSNͷ߹ • 5FSSBGPSNͦͷͷͱ1SPWJEFSͷόʔδϣϯΛཧ͢Δ • 5FSSBGPSNͷόʔδϣϯUGFOWͰཧ • IUUQTHJUIVCDPNUGVUJMTUGFOW
• 1SPWJEFSSFRVJSFE@QSPWJEFSTͰࢦఆ • ࠷ۙUFSSBGPSNMPDLIDMͱ͍͏QSPWJEFSͷMPDLϑΝΠϧొ • IUUQTXXXUFSSBGPSNJPEPDTMBOHVBHFQSPWJEFSTSFRVJSFNFOUTIUNM • ͍ΘΏΔϓϩάϥϛϯάݴޠͷόʔδϣϯཧʹ͍ۙ
33 開発ツール 開発ツール
34 ։ൃπʔϧ • γϯλοΫεΤϥʔ։ൃஈ֊Ͱݕ͍ͨ͠ • σϓϩΠ͔ͯ͠ΒΤϥʔͩͱ໘ • *%&ʹΈࠐΊΔ։ൃิॿπʔϧ͋Δͷ͔ʁʁ
35 ։ൃπʔϧ • $MPVEGPSNBUJPO • $GOMJOU • IUUQTBXTBNB[PODPNKQCMPHTOFXTHJUQSFDPNNJUWBMJEBUJPOPGBXT DMPVEGPSNBUJPOUFNQMBUFTXJUIDGOMJOU •
ҎԼͷΑ͏ͳνΣοΫΛࣗಈͰͯ͘͠ΕΔ • ਖ਼͍͠ܗࣜʢ:BNM PS+TPOʣͰॻ͚͍ͯΔ͔ • όάͳ͍͔ʢଘࡏ͠ͳ͍มࢀরɺฦΓͷظʣ • ଞͷ࣮ํ๏ͷఏҊʢϋʔυίʔυͷճආʣ • *%&ʢ74$PEFʣͷϓϥάΠϯ͋Δ • IUUQTHJUIVCDPNBXTTDSJQUJOHHVZDGPSN74$PEF
36 ։ൃπʔϧ • 5FSSBGPSN • ίϚϯυΦϓγϣϯʹࣗಈิਖ਼ػೳ͕͋Δ • IUUQTXXXUFSSBGPSNJPEPDTDMJDPNNBOETGNUIUNM • อଘ࣌ʹ͜ͷίϚϯυΛ࣮ߦ͢ΕࣗಈͰߏจमਖ਼
• -JOUFSπʔϧଘࡏ • IUUQTHJUIVCDPNUFSSBGPSNMJOUFSTUGMJOU • ίʔυ͕ηΩϡϦςΟతʹͳ͍͔ΛνΣοΫ͢Δπʔϧ • ྫɿηΩϡϦςΟάϧʔϓ͕શ։Ͱઃఆ͞Ε͍ͯΔ • IUUQTHJUIVCDPNUGTFDUGTFD • *%&ͷϓϥάΠϯ͋Δ • 74$PEF 1Z$IBSN $ terraform fmt
37 まとめ まとめ
38 ·ͱΊ • $MPVEGPSNBUJPO • ෳࡶͳॲཧͷهड़͍͠ • ͋·Γෳࡶʹͯ͠͠·͏ͱݟʹ͘͘ͳΔ͜ͱ • "84ͱͷੑ͕ߴ͘ɺؔ࿈αʔϏεଟ͍
• ҟͳΔϦʔδϣϯͷσϓϩΠɺڥͱͷဃݕग़ • 5FSSBGPSN • ಉ͡ߏจͰҧ͏*BB4ʹσϓϩΠͰ͖Δ • 1SPWJEFS͕Γସ͑ΒΕΔނͷϝϦοτ • ߏจόʔδϣϯཧ͕ϓϩάϥϛϯάݴޠʹ͍ۙ • ϓϩάϥϜܦݧͷ͋ΔํೃછΈ͍͔͢
39 ऴΘΓ օ͞Μͷૉఢͳ *B$ϥΠϑΛԠԉͯ͠·͢ʂ
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