Terraform at Wantedly (Tech-Circle #12)

Tech-Circle #12 Terraform Handson での LT 発表資料です
http://techcircle.connpass.com/event/25496/

Transcript

1. TERRAFORM

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

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2. Daisuke Fujita
   @dtan4
   Πϯλʔϯ

   @ΠϯϑϥνʔϜ
   

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5. Terraform flow
   @ Wantedly
   since May 2015
   

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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
   

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

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8. Terraform ؀ڥ
   GitHub wercker S3 remote backend
   Vagrant CoreOS Docker
   quay.io/wantedly/terraform
   3FNPUF
   -PDBM
   

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9. Terraform flow
   Terraform ίʔυΛॻ͍ͯ Pull Request Λग़͢
   

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10. Terraform flow
    Terraform ίʔυΛॻ͍ͯ Pull Request Λग़͢
    

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

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

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13. Terraform flow
    ΠϯϑϥνʔϜ͕ϨϏϡʔͯ͠ Merge
    

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14. Terraform flow
    CI Ͱ࣮؀ڥ΁ͷద༻

    (terraform apply) ͕ߦΘΕΔ
    

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15. e.g. DNS Ϩίʔυ௥Ճ
    

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16. e.g. IAM Ϣʔβ௥Ճ
    ৽͍͠։ൃϝϯόʔͷ௨աّྱ
    

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17. e.g. GitHub ্Ͱ֬ೝͰ͖ͯศར
    

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18. Terraform ಋೖͷաఔ
    

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

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

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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"
    }
    

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

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

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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
    

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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
    

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

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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
    

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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
    

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

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30. ૺ۰ͨ͠໰୊
    

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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…
    

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

    ࢓૊ΈΛ࡞Δ
    
    • खݩͰ apply Ͱ͖Δ؀ڥ
    

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33. ELB ഑ԼͷΠϯελϯε͕

    ҙਤͤͣஔ͖׵ΘΔ
    • Terraform ͷ ELB resource ͸

    ௻Δ͢ΠϯελϯεΛ໌ࣔతʹॻ͘ඞཁ͋Γ
    
    • Wantedly Ͱ͸ࣗલπʔϧͰ

    Πϯελϯεͷ૿ݮɺELB ΁ͷ௻Δ͠Λߦ͏
    
    • Terraform ίʔυͱ࣮ࡍͷ؀ڥʹࠩҟ͕ग़Δ
    

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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"]
    }
    }
    

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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
    

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36. ·ͱΊ
    

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37. ·ͱΊ
    • Wantedly ͷΠϯϑϥ͸

    Terraform Ͱ؅ཧ͞Ε͍ͯ·͢ʂ
    
    • ݱߦΠϯϑϥΛ Terraform Ͱ؅ཧ͢ΔͨΊʹ

    Terraforming ͱ͍͏πʔϧΛ։ൃ͠·ͨ͠
    
    • ͢΂ͯΛ Terraform ʹ೚͖ͤͬΓʹ͠ͳ͍
    

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