exercism / terraform

For support, please post in the new Exercism forum. New posts here will be closed.

---

Welcome to Exercism

Where to open issues

For the time being we are triaging all issues from our forum. Please start a new topic there for your issue (presuming there isn't one already). Issues opened here will be automatically closed and you will receive a message redirecting you to the forum.

Feeling uncomfortable?

If you need to report a code of conduct violation, please email us at [email protected] and include [CoC] in the subject line. We will follow up with you as a priority.

Where to find the code

The code for the website lives in exercism/website. The code for the old website is in this repository, in the v1.exercism.io branch.

Who's behind Exercism?

Read about our Team on the site: https://exercism.org/team

terraform's Issues

The master branch will be renamed to main

In line with our new org-wide policy, the master branch of this repo will be renamed to main. All open PRs will be automatically repointed.

GitHub will show you a notification about this when you look at this repo after renaming:

In case it doesn't, this is the command it suggests:

git branch -m master main
git fetch origin
git branch -u origin/main main

You may like to update the primary branch on your forks too, which you can do under Settings->Branches and clicking the pencil icon on the right-hand-side under Default Branch:

We will post a comment below when this is done. We expect it to happen within the next 12 hours.

tfvars can't be used to create different environments.

Variables are literally variables, they do not allow the creation of multiple environments.

Example: I created environments/production.tfvars, and reduced the AZ count to 2. plan now wants to delete one of the AZ in my "staging" environment.

Whole config should be wrapped in a module, and a directory-per-environment created that calls on that module.

~/P/e/t/terraform (master|✚3…1) $ cat environments/production.tfvars 
region = "eu-west-2"
az_count = 2

~/P/e/t/terraform (master|✚3…1) $ diff environments/{staging,production}.tfvars
2c2
< az_count = 3
---
> az_count = 2
~/P/e/t/terraform (master|✚3…1) $ terraform plan -var-file=environments/production.tfvars
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.

data.aws_availability_zones.available: Refreshing state...
aws_vpc.main: Refreshing state... [id=vpc-0d91d222fa72a8fa8]
aws_db_parameter_group.main: Refreshing state... [id=rds-v3]
aws_eip.private_gateways[1]: Refreshing state... [id=eipalloc-0e7cb498daf460f0b]
aws_eip.private_gateways[0]: Refreshing state... [id=eipalloc-06a70f6be28944594]
aws_eip.private_gateways[2]: Refreshing state... [id=eipalloc-07b7f8ab007308da4]
aws_internet_gateway.main: Refreshing state... [id=igw-06bf51e4ada622a35]
aws_security_group.rds: Refreshing state... [id=sg-04dd409818f91e8b1]
aws_subnet.webservers[2]: Refreshing state... [id=subnet-06a8467ea081d660f]
aws_subnet.privates[0]: Refreshing state... [id=subnet-0dbda1bac4cf7dd1f]
aws_subnet.privates[1]: Refreshing state... [id=subnet-08db7526626d6e8c9]
aws_subnet.privates[2]: Refreshing state... [id=subnet-0c4aa221e97364b6c]
aws_subnet.webservers[1]: Refreshing state... [id=subnet-083ae02cbe187a447]
aws_subnet.webservers[0]: Refreshing state... [id=subnet-0c7a7b8097c4d9cb5]
aws_route_table.webserver: Refreshing state... [id=rtb-0beeaa901f5f131cc]
aws_security_group_rule.main_rds_ingress_mysql: Refreshing state... [id=sgrule-3417809429]
aws_security_group_rule.main_rds_egress_public: Refreshing state... [id=sgrule-1657045022]
aws_db_subnet_group.main: Refreshing state... [id=v3-rds]
aws_nat_gateway.privates[0]: Refreshing state... [id=nat-009f73da3e24e9638]
aws_nat_gateway.privates[1]: Refreshing state... [id=nat-0b040f70d7da905b6]
aws_nat_gateway.privates[2]: Refreshing state... [id=nat-086a08621c32522de]
aws_route_table_association.webservers[1]: Refreshing state... [id=rtbassoc-0688a55aa3f4b9b3d]
aws_route_table_association.webservers[0]: Refreshing state... [id=rtbassoc-01b9e17a5fdc63dac]
aws_route_table_association.webservers[2]: Refreshing state... [id=rtbassoc-0d3120fd2b911c2ab]
aws_route_table.privates[0]: Refreshing state... [id=rtb-05c42f7709e05cc5d]
aws_route_table.privates[1]: Refreshing state... [id=rtb-08b98341525d521bf]
aws_route_table.privates[2]: Refreshing state... [id=rtb-0268889699936c017]
aws_db_instance.main: Refreshing state... [id=v3]
aws_route_table_association.private[0]: Refreshing state... [id=rtbassoc-028f652f4b8ce5a2c]
aws_route_table_association.private[2]: Refreshing state... [id=rtbassoc-0fc4f5d2dde4cba4c]
aws_route_table_association.private[1]: Refreshing state... [id=rtbassoc-0652b975ac88818a1]

------------------------------------------------------------------------

An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
  ~ update in-place
  - destroy
-/+ destroy and then create replacement

Terraform will perform the following actions:

  # aws_db_instance.main will be updated in-place
  ~ resource "aws_db_instance" "main" {
        address                               = "v3.cifqm9zogop9.eu-west-2.rds.amazonaws.com"
        allocated_storage                     = 20
        arn                                   = "arn:aws:rds:eu-west-2:169093608028:db:v3"
        auto_minor_version_upgrade            = true
        availability_zone                     = "eu-west-2a"
        backup_retention_period               = 0
        backup_window                         = "04:12-04:42"
        ca_cert_identifier                    = "rds-ca-2019"
        copy_tags_to_snapshot                 = false
        db_subnet_group_name                  = "v3-rds"
        delete_automated_backups              = true
        deletion_protection                   = false
        enabled_cloudwatch_logs_exports       = [
            "error",
            "slowquery",
        ]
        endpoint                              = "v3.cifqm9zogop9.eu-west-2.rds.amazonaws.com:3306"
        engine                                = "mysql"
        engine_version                        = "5.7.26"
      ~ final_snapshot_identifier             = "v3-2020-06-14-15-42-30" -> (known after apply)
        hosted_zone_id                        = "Z1TTGA775OQIYO"
        iam_database_authentication_enabled   = false
        id                                    = "v3"
        identifier                            = "v3"
        instance_class                        = "db.t3.micro"
        iops                                  = 0
        license_model                         = "general-public-license"
        maintenance_window                    = "wed:02:26-wed:02:56"
        max_allocated_storage                 = 0
        monitoring_interval                   = 0
        multi_az                              = false
        name                                  = "exercism_v3"
        option_group_name                     = "default:mysql-5-7"
        parameter_group_name                  = "rds-v3"
        password                              = (sensitive value)
        performance_insights_enabled          = false
        performance_insights_retention_period = 0
        port                                  = 3306
        publicly_accessible                   = false
        replicas                              = []
        resource_id                           = "db-VYKKITLQB2SXO7IKUSL7SVAEPQ"
        security_group_names                  = []
        skip_final_snapshot                   = false
        status                                = "available"
        storage_encrypted                     = false
        storage_type                          = "gp2"
        tags                                  = {
            "Name" = "v3"
        }
        username                              = "exercism_v3"
        vpc_security_group_ids                = [
            "sg-04dd409818f91e8b1",
        ]
    }

  # aws_db_subnet_group.main will be updated in-place
  ~ resource "aws_db_subnet_group" "main" {
        arn         = "arn:aws:rds:eu-west-2:169093608028:subgrp:v3-rds"
        description = "Managed by Terraform"
        id          = "v3-rds"
        name        = "v3-rds"
      ~ subnet_ids  = [
          - "subnet-06a8467ea081d660f",
          - "subnet-083ae02cbe187a447",
          - "subnet-0c7a7b8097c4d9cb5",
        ] -> (known after apply)
        tags        = {
            "Name" = "v3"
        }
    }

  # aws_eip.private_gateways[2] will be destroyed
  - resource "aws_eip" "private_gateways" {
      - association_id    = "eipassoc-f86bb904" -> null
      - domain            = "vpc" -> null
      - id                = "eipalloc-07b7f8ab007308da4" -> null
      - network_interface = "eni-0f6cb79fe277146fc" -> null
      - private_dns       = "ip-10-1-8-22.eu-west-2.compute.internal" -> null
      - private_ip        = "10.1.8.22" -> null
      - public_dns        = "ec2-35-178-143-190.eu-west-2.compute.amazonaws.com" -> null
      - public_ip         = "35.178.143.190" -> null
      - public_ipv4_pool  = "amazon" -> null
      - tags              = {
          - "Name" = "v3 private eu-west-2c"
        } -> null
      - vpc               = true -> null
    }

  # aws_nat_gateway.privates[0] must be replaced
-/+ resource "aws_nat_gateway" "privates" {
        allocation_id        = "eipalloc-06a70f6be28944594"
      ~ id                   = "nat-009f73da3e24e9638" -> (known after apply)
      ~ network_interface_id = "eni-096cdc536971cb673" -> (known after apply)
      ~ private_ip           = "10.1.6.239" -> (known after apply)
      ~ public_ip            = "18.132.112.62" -> (known after apply)
      ~ subnet_id            = "subnet-0dbda1bac4cf7dd1f" -> (known after apply) # forces replacement
        tags                 = {
            "Name" = "v3 private eu-west-2a"
        }
    }

  # aws_nat_gateway.privates[1] must be replaced
-/+ resource "aws_nat_gateway" "privates" {
        allocation_id        = "eipalloc-0e7cb498daf460f0b"
      ~ id                   = "nat-0b040f70d7da905b6" -> (known after apply)
      ~ network_interface_id = "eni-0efee13a5ba1aa889" -> (known after apply)
      ~ private_ip           = "10.1.7.96" -> (known after apply)
      ~ public_ip            = "3.9.163.245" -> (known after apply)
      ~ subnet_id            = "subnet-08db7526626d6e8c9" -> (known after apply) # forces replacement
        tags                 = {
            "Name" = "v3 private eu-west-2b"
        }
    }

  # aws_nat_gateway.privates[2] will be destroyed
  - resource "aws_nat_gateway" "privates" {
      - allocation_id        = "eipalloc-07b7f8ab007308da4" -> null
      - id                   = "nat-086a08621c32522de" -> null
      - network_interface_id = "eni-0f6cb79fe277146fc" -> null
      - private_ip           = "10.1.8.22" -> null
      - public_ip            = "35.178.143.190" -> null
      - subnet_id            = "subnet-0c4aa221e97364b6c" -> null
      - tags                 = {
          - "Name" = "v3 private eu-west-2c"
        } -> null
    }

  # aws_route_table.privates[0] will be updated in-place
  ~ resource "aws_route_table" "privates" {
        id               = "rtb-05c42f7709e05cc5d"
        owner_id         = "169093608028"
        propagating_vgws = []
      ~ route            = [
          - {
              - cidr_block                = "0.0.0.0/0"
              - egress_only_gateway_id    = ""
              - gateway_id                = ""
              - instance_id               = ""
              - ipv6_cidr_block           = ""
              - nat_gateway_id            = "nat-009f73da3e24e9638"
              - network_interface_id      = ""
              - transit_gateway_id        = ""
              - vpc_peering_connection_id = ""
            },
            {
                cidr_block                = "0.0.0.0/0"
                egress_only_gateway_id    = ""
                gateway_id                = ""
                instance_id               = ""
                ipv6_cidr_block           = ""
                nat_gateway_id            = (known after apply)
                network_interface_id      = ""
                transit_gateway_id        = ""
                vpc_peering_connection_id = ""
            },
        ]
        tags             = {
            "Name" = "v3 private eu-west-2a"
        }
        vpc_id           = "vpc-0d91d222fa72a8fa8"
    }

  # aws_route_table.privates[1] will be updated in-place
  ~ resource "aws_route_table" "privates" {
        id               = "rtb-08b98341525d521bf"
        owner_id         = "169093608028"
        propagating_vgws = []
      ~ route            = [
          - {
              - cidr_block                = "0.0.0.0/0"
              - egress_only_gateway_id    = ""
              - gateway_id                = ""
              - instance_id               = ""
              - ipv6_cidr_block           = ""
              - nat_gateway_id            = "nat-0b040f70d7da905b6"
              - network_interface_id      = ""
              - transit_gateway_id        = ""
              - vpc_peering_connection_id = ""
            },
            {
                cidr_block                = "0.0.0.0/0"
                egress_only_gateway_id    = ""
                gateway_id                = ""
                instance_id               = ""
                ipv6_cidr_block           = ""
                nat_gateway_id            = (known after apply)
                network_interface_id      = ""
                transit_gateway_id        = ""
                vpc_peering_connection_id = ""
            },
        ]
        tags             = {
            "Name" = "v3 private eu-west-2b"
        }
        vpc_id           = "vpc-0d91d222fa72a8fa8"
    }

  # aws_route_table.privates[2] will be destroyed
  - resource "aws_route_table" "privates" {
      - id               = "rtb-0268889699936c017" -> null
      - owner_id         = "169093608028" -> null
      - propagating_vgws = [] -> null
      - route            = [
          - {
              - cidr_block                = "0.0.0.0/0"
              - egress_only_gateway_id    = ""
              - gateway_id                = ""
              - instance_id               = ""
              - ipv6_cidr_block           = ""
              - nat_gateway_id            = "nat-086a08621c32522de"
              - network_interface_id      = ""
              - transit_gateway_id        = ""
              - vpc_peering_connection_id = ""
            },
        ] -> null
      - tags             = {
          - "Name" = "v3 private eu-west-2c"
        } -> null
      - vpc_id           = "vpc-0d91d222fa72a8fa8" -> null
    }

  # aws_route_table_association.private[0] must be replaced
-/+ resource "aws_route_table_association" "private" {
      ~ id             = "rtbassoc-028f652f4b8ce5a2c" -> (known after apply)
        route_table_id = "rtb-05c42f7709e05cc5d"
      ~ subnet_id      = "subnet-0dbda1bac4cf7dd1f" -> (known after apply) # forces replacement
    }

  # aws_route_table_association.private[1] must be replaced
-/+ resource "aws_route_table_association" "private" {
      ~ id             = "rtbassoc-0652b975ac88818a1" -> (known after apply)
        route_table_id = "rtb-08b98341525d521bf"
      ~ subnet_id      = "subnet-08db7526626d6e8c9" -> (known after apply) # forces replacement
    }

  # aws_route_table_association.private[2] will be destroyed
  - resource "aws_route_table_association" "private" {
      - id             = "rtbassoc-0fc4f5d2dde4cba4c" -> null
      - route_table_id = "rtb-0268889699936c017" -> null
      - subnet_id      = "subnet-0c4aa221e97364b6c" -> null
    }

  # aws_route_table_association.webservers[0] must be replaced
-/+ resource "aws_route_table_association" "webservers" {
      ~ id             = "rtbassoc-01b9e17a5fdc63dac" -> (known after apply)
        route_table_id = "rtb-0beeaa901f5f131cc"
      ~ subnet_id      = "subnet-0c7a7b8097c4d9cb5" -> (known after apply) # forces replacement
    }

  # aws_route_table_association.webservers[1] must be replaced
-/+ resource "aws_route_table_association" "webservers" {
      ~ id             = "rtbassoc-0688a55aa3f4b9b3d" -> (known after apply)
        route_table_id = "rtb-0beeaa901f5f131cc"
      ~ subnet_id      = "subnet-083ae02cbe187a447" -> (known after apply) # forces replacement
    }

  # aws_route_table_association.webservers[2] will be destroyed
  - resource "aws_route_table_association" "webservers" {
      - id             = "rtbassoc-0d3120fd2b911c2ab" -> null
      - route_table_id = "rtb-0beeaa901f5f131cc" -> null
      - subnet_id      = "subnet-06a8467ea081d660f" -> null
    }

  # aws_subnet.privates[0] must be replaced
-/+ resource "aws_subnet" "privates" {
      ~ arn                             = "arn:aws:ec2:eu-west-2:169093608028:subnet/subnet-0dbda1bac4cf7dd1f" -> (known after apply)
        assign_ipv6_address_on_creation = false
        availability_zone               = "eu-west-2a"
      ~ availability_zone_id            = "euw2-az2" -> (known after apply)
      ~ cidr_block                      = "10.1.6.0/24" -> "10.1.4.0/24" # forces replacement
      ~ id                              = "subnet-0dbda1bac4cf7dd1f" -> (known after apply)
      + ipv6_cidr_block                 = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
        map_public_ip_on_launch         = false
      ~ owner_id                        = "169093608028" -> (known after apply)
        tags                            = {
            "Name" = "v3 private eu-west-2a"
        }
        vpc_id                          = "vpc-0d91d222fa72a8fa8"
    }

  # aws_subnet.privates[1] must be replaced
-/+ resource "aws_subnet" "privates" {
      ~ arn                             = "arn:aws:ec2:eu-west-2:169093608028:subnet/subnet-08db7526626d6e8c9" -> (known after apply)
        assign_ipv6_address_on_creation = false
        availability_zone               = "eu-west-2b"
      ~ availability_zone_id            = "euw2-az3" -> (known after apply)
      ~ cidr_block                      = "10.1.7.0/24" -> "10.1.5.0/24" # forces replacement
      ~ id                              = "subnet-08db7526626d6e8c9" -> (known after apply)
      + ipv6_cidr_block                 = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
        map_public_ip_on_launch         = false
      ~ owner_id                        = "169093608028" -> (known after apply)
        tags                            = {
            "Name" = "v3 private eu-west-2b"
        }
        vpc_id                          = "vpc-0d91d222fa72a8fa8"
    }

  # aws_subnet.privates[2] will be destroyed
  - resource "aws_subnet" "privates" {
      - arn                             = "arn:aws:ec2:eu-west-2:169093608028:subnet/subnet-0c4aa221e97364b6c" -> null
      - assign_ipv6_address_on_creation = false -> null
      - availability_zone               = "eu-west-2c" -> null
      - availability_zone_id            = "euw2-az1" -> null
      - cidr_block                      = "10.1.8.0/24" -> null
      - id                              = "subnet-0c4aa221e97364b6c" -> null
      - map_public_ip_on_launch         = false -> null
      - owner_id                        = "169093608028" -> null
      - tags                            = {
          - "Name" = "v3 private eu-west-2c"
        } -> null
      - vpc_id                          = "vpc-0d91d222fa72a8fa8" -> null
    }

  # aws_subnet.webservers[0] must be replaced
-/+ resource "aws_subnet" "webservers" {
      ~ arn                             = "arn:aws:ec2:eu-west-2:169093608028:subnet/subnet-0c7a7b8097c4d9cb5" -> (known after apply)
        assign_ipv6_address_on_creation = false
        availability_zone               = "eu-west-2a"
      ~ availability_zone_id            = "euw2-az2" -> (known after apply)
      ~ cidr_block                      = "10.1.3.0/24" -> "10.1.2.0/24" # forces replacement
      ~ id                              = "subnet-0c7a7b8097c4d9cb5" -> (known after apply)
      + ipv6_cidr_block                 = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
        map_public_ip_on_launch         = false
      ~ owner_id                        = "169093608028" -> (known after apply)
        tags                            = {
            "Name" = "private 0"
        }
        vpc_id                          = "vpc-0d91d222fa72a8fa8"
    }

  # aws_subnet.webservers[1] must be replaced
-/+ resource "aws_subnet" "webservers" {
      ~ arn                             = "arn:aws:ec2:eu-west-2:169093608028:subnet/subnet-083ae02cbe187a447" -> (known after apply)
        assign_ipv6_address_on_creation = false
        availability_zone               = "eu-west-2b"
      ~ availability_zone_id            = "euw2-az3" -> (known after apply)
      ~ cidr_block                      = "10.1.4.0/24" -> "10.1.3.0/24" # forces replacement
      ~ id                              = "subnet-083ae02cbe187a447" -> (known after apply)
      + ipv6_cidr_block                 = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
        map_public_ip_on_launch         = false
      ~ owner_id                        = "169093608028" -> (known after apply)
        tags                            = {
            "Name" = "private 1"
        }
        vpc_id                          = "vpc-0d91d222fa72a8fa8"
    }

  # aws_subnet.webservers[2] will be destroyed
  - resource "aws_subnet" "webservers" {
      - arn                             = "arn:aws:ec2:eu-west-2:169093608028:subnet/subnet-06a8467ea081d660f" -> null
      - assign_ipv6_address_on_creation = false -> null
      - availability_zone               = "eu-west-2c" -> null
      - availability_zone_id            = "euw2-az1" -> null
      - cidr_block                      = "10.1.5.0/24" -> null
      - id                              = "subnet-06a8467ea081d660f" -> null
      - map_public_ip_on_launch         = false -> null
      - owner_id                        = "169093608028" -> null
      - tags                            = {
          - "Name" = "private 2"
        } -> null
      - vpc_id                          = "vpc-0d91d222fa72a8fa8" -> null
    }

Plan: 10 to add, 4 to change, 17 to destroy.

------------------------------------------------------------------------

Note: You didn't specify an "-out" parameter to save this plan, so Terraform
can't guarantee that exactly these actions will be performed if
"terraform apply" is subsequently run.