Terraform at Wantedly

Transcript

1. 1.

   TERRAFORM
 at WANTEDLY 2015-08-05 HashiCorp Tools Meetup @dtan4

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   Daisuke Fujita @dtan4 Πϯλʔϯ
 @ΠϯϑϥνʔϜ

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   None
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   HashiCorp in Wantedly Terraform Vagrant Packer

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   ࠓ೔࿩͢͜ͱ Wantedly Ͱͷ
 Terraform ӡ༻ࣄྫ

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   Terraform flow @ Wantedly since May 2015

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   Terraform Ͱ؅ཧ͍ͯ͠Δ਺ 27 resource types aws_customer_gateway aws_db_instance 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
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   Terraform Ͱ؅ཧ͍ͯ͠Δ਺ AWS 199 DNSimple 155 354 resources

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   Terraform ؀ڥ GitHub wercker S3 remote backend Vagrant CoreOS Docker

   quay.io/wantedly/terraform 3FNPUF -PDBM
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    Terraform flow Terraform ίʔυΛॻ͍ͯ Pull Request Λग़͢

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    Terraform flow Terraform ίʔυΛॻ͍ͯ Pull Request Λग़͢

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    Terraform flow CI Ͱςετ (terraform plan) ͕૸Δ

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    Terraform flow CI Ͱςετ (terraform plan) ͕૸Δ

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    Terraform flow ΠϯϑϥνʔϜ͕ϨϏϡʔͯ͠ Merge

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

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

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    e.g. DNS Ϩίʔυ௥Ճ

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    e.g. IAM Ϣʔβ௥Ճ

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    e.g. GitHub ্Ͱ֬ೝͰ͖ͯศར

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    Terraform ಋೖͷաఔ

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

    ϦιʔεҰཡΛ
 ͩΕͰ΋؆୯ʹݟΒΕΔΑ͏ʹ͍ͨ͠ • Ϧιʔεෳ੡Λָʹ͍ͨ͠
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    Ұ͔ΒΠϯϑϥߏங΍ϦϓϨʔεͰ͸ͳ͘ɺ
 ͍·ಈ͍͍ͯΔΠϯϑϥϦιʔε
 ΛίʔυԽ͍ͨ͠

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

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    ݱߦ؀ڥ΁ͷ Terraform ಋೖ https://github.com/hashicorp/terraform/issues/581 طଘϦιʔεͷ Terraform ίʔυԽ͸
 ࣮૷͞Ε͍ͯͳ͍

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

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

    tfstate) Λੜ੒͢Δ
 ίϚϯυϥΠϯπʔϧ • 24छྨͷ AWS ϦιʔεʹରԠ • Wantedly ͷ Terraform ίʔυͷେ൒Λੜ੒ • Issue & Pull Request ͓·ͪͯ͠·͢ʂ dtan4/terraforming $ gem install terraforming # or $ docker pull quay.io/dtan4/terraforming
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    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
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    http://qiita.com/dtan4/items/345c56281ab0e87d6646

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    ૺ۰ͨ͠໰୊

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

    dry-run ͸͠ͳ͍ • terraform plan ͕௨ͬͯ΋ɺύϥϝʔλ͕ AWS తʹෆਖ਼Ͱ terraform apply ʹࣦഊ͢Δ • CI Ͱʮςετʯ͍ͯ͠Δҙຯ͕…
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    terraform plan ͕৴༻ग़དྷͳ͍ • AWS ͷυΩϡϝϯτ΋ಡ·ͳ͍ͱ͍͚ͳ͍ • terraform apply ࣦഊͯ͠΋ϦΧόϦͰ͖Δ


    ࢓૊ΈΛ࡞Δ • खݩͰ apply Ͱ͖Δ؀ڥ
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    ELB ഑ԼͷΠϯελϯε͕
 ҙਤͤͣஔ͖׵ΘΔ • Terraform ͷ ELB resource ͸
 ௻Δ͢ΠϯελϯεΛ໌ࣔతʹॻ͘ඞཁ͋Γ

    • Wantedly Ͱ͸ࣗલπʔϧͰ
 Πϯελϯεͷ૿ݮɺELB ΁ͷ௻Δ͠Λߦ͏ • Terraform ίʔυͱ࣮ࡍͷ؀ڥʹࠩҟ͕ग़Δ
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    ELB ഑ԼͷΠϯελϯε͕
 ҙਤͤͣஔ͖׵ΘΔ • සൟʹΠϯελϯε͕ஔ͖׵ΘΔ ELB ͸
 Terraform Ͱ؅ཧ͠ͳ͍͜ͱʹͨ͠ •

    ֎෦Ͱಈతͳมߋ͕͋Γ͏ΔϦιʔε͸
 ͋͑ͯ؅ཧ͠ͳ͍
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    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
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    ·ͱΊ

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


    Terraforming ͱ͍͏πʔϧΛ։ൃ͠·ͨ͠ • ͢΂ͯΛ Terraform ʹ೚͖ͤͬΓʹ͠ͳ͍