Terraform at Wantedly (Tech-Circle #12)

Transcript

1. TERRAFORM
 at WANTEDLY 2016-01-29 Tech-Circle #12 Terraform Handson @dtan4

2. Daisuke Fujita @dtan4 Πϯλʔϯ
 @ΠϯϑϥνʔϜ

3. None
4. None

5. Terraform flow @ Wantedly since May 2015

6. Terraform Ͱ؅ཧ͍ͯ͠Δ਺ 28 resource types aws_customer_gateway aws_db_instance aws_db_parameter_group aws_db_security_group aws_db_subnet_group

   aws_elasticache_cluster aws_elasticache_subnet_group aws_elb aws_iam_group aws_iam_group_membership aws_iam_group_policy aws_iam_role aws_iam_role_policy aws_iam_user aws_iam_user_policy aws_instance aws_internet_gateway aws_network_acl aws_route_table aws_route_table_association aws_s3_bucket aws_security_group aws_subnet aws_vpc aws_vpn_connection aws_vpn_connection_route aws_vpn_gateway dnsimple_record

7. Terraform Ͱ؅ཧ͍ͯ͠Δ਺ AWS 224 DNSimple 169 393 resources

8. Terraform ؀ڥ GitHub wercker S3 remote backend Vagrant CoreOS Docker

   quay.io/wantedly/terraform 3FNPUF -PDBM

9. Terraform flow Terraform ίʔυΛॻ͍ͯ Pull Request Λग़͢

10. Terraform flow Terraform ίʔυΛॻ͍ͯ Pull Request Λग़͢

11. Terraform flow CI Ͱςετ (terraform plan) ͕૸Δ

12. Terraform flow CI Ͱςετ (terraform plan) ͕૸Δ

13. Terraform flow ΠϯϑϥνʔϜ͕ϨϏϡʔͯ͠ Merge

14. Terraform flow CI Ͱ࣮؀ڥ΁ͷద༻
 (terraform apply) ͕ߦΘΕΔ

15. e.g. DNS Ϩίʔυ௥Ճ

16. e.g. IAM Ϣʔβ௥Ճ ৽͍͠։ൃϝϯόʔͷ௨աّྱ

17. e.g. GitHub ্Ͱ֬ೝͰ͖ͯศར

18. Terraform ಋೖͷաఔ

19. ಋೖͨ͠ܦҢ • Management Console ϙνϙνۀ͔Βͷ୤٫ • ΠϯϑϥνʔϜ΁ͷ࡞ۀूத͔Βͷ୤٫ • ߏங࡞ۀͷཤྺΛ࢒͍ͨ͠ •

    ϦιʔεҰཡΛ
 ͩΕͰ΋؆୯ʹݟΒΕΔΑ͏ʹ͍ͨ͠ • Ϧιʔεෳ੡Λָʹ͍ͨ͠ • AWS ͱ DNSimple Ұॹʹѻ͑ͯศར

20. Ұ͔ΒΠϯϑϥߏங΍ϦϓϨʔεͰ͸ͳ͘ɺ
 ͍·ಈ͍͍ͯΔΠϯϑϥϦιʔε
 ΛίʔυԽ͍ͨ͠ resource "aws_instance" "app" { count = 4

    ami = "ami-408c7f28" instance_type = "t1.micro" } resource "aws_instance" "app" { count = 4 ami = "ami-408c7f28" instance_type = "t1.micro" }

21. ݱߦ؀ڥ΁ͷ Terraform ಋೖ https://github.com/hashicorp/terraform/issues/581

22. ݱߦ؀ڥ΁ͷ Terraform ಋೖ https://github.com/hashicorp/terraform/issues/581 طଘϦιʔε͔Β Terraform ίʔυ Λੜ੒͢Δػೳ͸࣮૷͞Ε͍ͯͳ͍

23. ݱߦ؀ڥ΁ͷ Terraform ಋೖ ex: hoge ͱ͍͏ S3 bucket ͕͋ͬͨͱ͖ resource

    "aws_s3_bucket" "hoge" { bucket = "hoge" acl = "private" } { "version": 1, "serial": 1, "modules": { "path": [ "root" ], "outputs": { }, "resources": { "aws_s3_bucket.hoge": { "type": "aws_s3_bucket", "primary": { "id": "hoge", "attributes": { "acl": "private", "bucket": "hoge", "id": "hoge" } } } } } } TUG UFSSBGPSNUGTUBUF

24. ݱߦ؀ڥ΁ͷ Terraform ಋೖ ex: hoge ͱ͍͏ S3 bucket ͕͋ͬͨͱ͖ resource

    "aws_s3_bucket" "hoge" { bucket = "hoge" acl = "private" } { "version": 1, "serial": 1, "modules": { "path": [ "root" ], "outputs": { }, "resources": { "aws_s3_bucket.hoge": { "type": "aws_s3_bucket", "primary": { "id": "hoge", "attributes": { "acl": "private", "bucket": "hoge", "id": "hoge" } } } } } } TUG UFSSBGPSNUGTUBUF tfstate (JSON)
 ਓྗͰॻ͘ͷ͸ݫ͍͠

25. Export existing AWS resources to Terraform style (tf, tfstate) dtan4/terraforming

26. Terraforming • طଘͷ AWS / DNSimple Ϧιʔε͔Β
 Terraform ͷίʔυ (tf,

    tfstate) Λੜ੒͢Δ
 ίϚϯυϥΠϯπʔϧ • 29छྨͷ AWS ϦιʔεʹରԠ • Wantedly ͷ Terraform ίʔυͷେ൒Λੜ੒ • Issue & Pull Request ͓·ͪͯ͠·͢ʂ dtan4/terraforming $ gem install terraforming # or $ docker pull quay.io/dtan4/terraforming
27. None

28. Terraforming • S3 buckets ͷ tf Λੜ੒ • S3 buckets

    ͷ tfstate Λੜ੒ • S3 buckets ͷ tfstate Λੜ੒͠ɺ
 طଘͷ terraform.tfstate ͱϚʔδ $ terraforming s3 $ terraforming s3 --tfstate \ --merge=/path/to/terraform.tfstate $ terraforming s3 --tfstate dtan4/terraforming

29. http://qiita.com/dtan4/items/345c56281ab0e87d6646

30. ૺ۰ͨ͠໰୊

31. terraform plan ͕৴༻ग़དྷͳ͍ • HCL ͷγϯλοΫενΣοΫͱ
 Terraform ύϥϝʔλͷνΣοΫͷΈɺ
 API ͷ

    dry-run ͸͠ͳ͍ • terraform plan ͕௨ͬͯ΋ɺύϥϝʔλ͕ AWS తʹෆਖ਼Ͱ terraform apply ʹࣦഊ͢Δ • CI Ͱʮςετʯ͍ͯ͠Δҙຯ͕…

32. terraform plan ͕৴༻ग़དྷͳ͍ • AWS ͷυΩϡϝϯτ΋ಡ·ͳ͍ͱ͍͚ͳ͍ • terraform apply ࣦഊͯ͠΋ϦΧόϦͰ͖Δ


    ࢓૊ΈΛ࡞Δ • खݩͰ apply Ͱ͖Δ؀ڥ

33. ELB ഑ԼͷΠϯελϯε͕
 ҙਤͤͣஔ͖׵ΘΔ • Terraform ͷ ELB resource ͸
 ௻Δ͢ΠϯελϯεΛ໌ࣔతʹॻ͘ඞཁ͋Γ

    • Wantedly Ͱ͸ࣗલπʔϧͰ
 Πϯελϯεͷ૿ݮɺELB ΁ͷ௻Δ͠Λߦ͏ • Terraform ίʔυͱ࣮ࡍͷ؀ڥʹࠩҟ͕ग़Δ

34. ELB ഑ԼͷΠϯελϯε͕
 ҙਤͤͣஔ͖׵ΘΔ • සൟʹΠϯελϯε͕ஔ͖׵ΘΔ ELB ͸
 Terraform Ͱ؅ཧ͠ͳ͍͜ͱʹͨ͠ •

    ֎෦Ͱಈతͳมߋ͕͋Γ͏ΔϦιʔε͸
 ͋͑ͯ؅ཧ͠ͳ͍ • Terraform v0.6.4 Ͱ ignore_changes ͕ಋೖ resource "aws_elb" "foo" { lifecycle { ignore_changes = ["instances"] } }

35. IAM Ϣʔβ࡟আͰࣦഊ • IAM ϢʔβࣗମΛফ͢લʹΫϨσϯγϟϧ΍
 ϩάΠϯϓϩϑΝΠϧΛফ͢ඞཁ͕͋Δ • Terraform ͸ͦΜͳͷ͓ߏ͍ͳ͠ʹ delete-user

    ͠Α͏ͱ͢Δ • खಈͰґଘϦιʔεΛফ্ͨ͠Ͱ apply http://docs.aws.amazon.com/ja_jp/IAM/latest/UserGuide/Using_DeletingUserFromAccount.html

36. ·ͱΊ

37. ·ͱΊ • Wantedly ͷΠϯϑϥ͸
 Terraform Ͱ؅ཧ͞Ε͍ͯ·͢ʂ • ݱߦΠϯϑϥΛ Terraform Ͱ؅ཧ͢ΔͨΊʹ


    Terraforming ͱ͍͏πʔϧΛ։ൃ͠·ͨ͠ • ͢΂ͯΛ Terraform ʹ೚͖ͤͬΓʹ͠ͳ͍