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// Configure remote state
terraform {
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  backend "s3" {
    bucket = "gitlab-com-infrastructure"
    key    = "terraform/aws-snowplow/terraform.tfstate"
    region = "us-east-1"
  }
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}

// Use credentials from environment or shared credentials file
provider "aws" {
  region  = "us-east-1"
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  version = "~> 2.00"
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}

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// Policies
resource "aws_iam_policy" "snowplow_collector_policy" {
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  description = "Policy the allows the collector to access other AWS services such as Kinesis."
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  name        = "snowplow-collector-policy"
  path        = "/"
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  policy = <<EOF
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{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "cloudwatch:PutMetricData"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "kinesis:*"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}
EOF
}

resource "aws_iam_policy" "snowplow_enricher_policy" {
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  description = ""
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  name        = "snowplow-enricher-policy"
  path        = "/"
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  policy = <<EOF
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{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "cloudwatch:PutMetricData"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "dynamodb:*"
            ],
            "Resource": [
                "arn:aws:dynamodb:us-east-1:855262394183:table/SnowplowEnrich-gitlab-us-east-1"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "kinesis:*"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}
EOF
}

resource "aws_iam_policy" "snowplow_s3loader_policy" {
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  description = "Policy to provide AWS access to snowplow s3loader instances such as S3, DynamoDB, and Kinesis."
  name        = "snowplow-s3loader-policy"
  path        = "/"

  policy = <<EOF
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{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "cloudwatch:PutMetricData"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "s3:*"
            ],
            "Resource": [
                "arn:aws:s3:::gitlab-com-snowplow-test-one/*"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "dynamodb:*"
            ],
            "Resource": [
                "arn:aws:dynamodb:us-east-1:855262394183:table/SnowplowS3Loader-gitlab-us-east-1"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "kinesis:*"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}
EOF
}

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// VPC
resource "aws_vpc" "snowplow_vpc" {
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  cidr_block = "10.32.0.0/16"

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  tags = {
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    Name        = "SnowPlow VPC"
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    environment = "SnowPlow"
  }
}

// Subnet
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resource "aws_subnet" "snowplow_subnet_1" {
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  vpc_id            = "${aws_vpc.snowplow_vpc.id}"
  cidr_block        = "10.32.2.0/24"
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  availability_zone = "us-east-1a"
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  tags = {
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    Name        = "SnowPlow Subnet 1"
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    environment = "SnowPlow"
  }
}
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resource "aws_subnet" "snowplow_subnet_2" {
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  vpc_id            = "${aws_vpc.snowplow_vpc.id}"
  cidr_block        = "10.32.1.0/24"
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  availability_zone = "us-east-1e"
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  tags = {
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    Name        = "SnowPlow Subnet 2"
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    environment = "SnowPlow"
  }
}

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resource "aws_subnet" "snowplow_subnet_3" {
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  vpc_id            = "${aws_vpc.snowplow_vpc.id}"
  cidr_block        = "10.32.0.0/24"
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  availability_zone = "us-east-1b"
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  tags = {
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    Name        = "SnowPlow Subnet 3"
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    environment = "SnowPlow"
  }
}

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// Internet Gateway
resource "aws_internet_gateway" "snowplow_gw" {
  vpc_id = "${aws_vpc.snowplow_vpc.id}"

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  tags = {
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    Name        = "SnowPlow Gateway"
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    environment = "SnowPlow"
  }
}

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// Routing Tables
resource "aws_route_table" "snowplow_route_table" {
  vpc_id = "${aws_vpc.snowplow_vpc.id}"

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  tags = {
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    Name        = "SnowPlow Routing Table"
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    environment = "SnowPlow"
  }
}
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resource "aws_main_route_table_association" "snowplow_main_route_table_association" {
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  vpc_id         = "${aws_vpc.snowplow_vpc.id}"
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  route_table_id = "${aws_route_table.snowplow_route_table.id}"
}

resource "aws_route" "snowplow_route" {
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  route_table_id         = "${aws_route_table.snowplow_route_table.id}"
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  destination_cidr_block = "0.0.0.0/0"
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  gateway_id             = "${aws_internet_gateway.snowplow_gw.id}"
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}

resource "aws_route_table_association" "snowplow_route_table_association_1" {
  route_table_id = "${aws_route_table.snowplow_route_table.id}"
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  subnet_id      = "${aws_subnet.snowplow_subnet_1.id}"
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}

resource "aws_route_table_association" "snowplow_route_table_association_2" {
  route_table_id = "${aws_route_table.snowplow_route_table.id}"
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  subnet_id      = "${aws_subnet.snowplow_subnet_2.id}"
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}

resource "aws_route_table_association" "snowplow_route_table_association_3" {
  route_table_id = "${aws_route_table.snowplow_route_table.id}"
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  subnet_id      = "${aws_subnet.snowplow_subnet_3.id}"
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}

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// Kinesis Streams
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resource "aws_kinesis_stream" "snowplow_raw_good" {
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  name             = "snowplow-raw-good"
  shard_count      = 1
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  retention_period = 48
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  shard_level_metrics = [
    "IncomingBytes",
    "OutgoingBytes",
  ]
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  tags = {
    environment = "SnowPlow"
  }
}

resource "aws_kinesis_stream" "snowplow_raw_bad" {
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  name             = "snowplow-raw-bad"
  shard_count      = 1
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  retention_period = 48
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  shard_level_metrics = [
    "IncomingBytes",
    "OutgoingBytes",
  ]

  tags = {
    environment = "SnowPlow"
  }
}

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resource "aws_kinesis_stream" "snowplow_enriched_bad" {
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  name             = "snowplow-enriched-bad"
  shard_count      = 1
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  retention_period = 48
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  shard_level_metrics = [
    "IncomingBytes",
    "OutgoingBytes",
  ]
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  tags = {
    environment = "SnowPlow"
  }
}

resource "aws_kinesis_stream" "snowplow_enriched_good" {
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  name             = "snowplow-enriched-good"
  shard_count      = 1
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  retention_period = 48
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  shard_level_metrics = [
    "IncomingBytes",
    "OutgoingBytes",
  ]

  tags = {
    environment = "SnowPlow"
  }
}

resource "aws_kinesis_stream" "snowplow_s3loader_bad" {
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  name             = "snowplow-s3loader-bad"
  shard_count      = 1
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  retention_period = 48
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  shard_level_metrics = [
    "IncomingBytes",
    "OutgoingBytes",
  ]

  tags = {
    environment = "SnowPlow"
  }
}
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// EC2 Launch Configs
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data "aws_ami" "amazonlinux2" {
  most_recent = true

  filter {
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    name   = "name"
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    values = ["amzn2-ami-hvm-*-x86_64-gp2"]
  }

  filter {
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    name   = "virtualization-type"
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    values = ["hvm"]
  }

  owners = ["137112412989"] # Amazon Images
}

// Security Groups

resource "aws_launch_configuration" "snowplow_collector_launch_config" {
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  image_id                    = "${data.aws_ami.amazonlinux2.id}"
  instance_type               = "t2.micro"
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  associate_public_ip_address = "true"
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  enable_monitoring           = "false"
  iam_instance_profile        = "snowplow-collector-role"
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  security_groups = [
    "sg-0270f6c10c30d8bf3",
  ]

  user_data = <<EOUD
  #!/bin/bash
  ## This has, so far, been written to run on Amazon Linux 2 AMI.
  ## Install Java 1.8
  yum -y install java-1.8.0-openjdk
  ## Set up user, group, and install location
  groupadd snowplow
  adduser --system --gid snowplow snowplow
  mkdir -p /snowplow
  mkdir -p /snowplow/config
  ## Install SnowPlow Kinesis Collector
  mkdir -p /tmp/build
  cd /tmp/build
  wget -q http://dl.bintray.com/snowplow/snowplow-generic/snowplow_scala_stream_collector_kinesis_0.15.0.zip
  unzip -d /snowplow/bin snowplow_scala_stream_collector_kinesis_0.15.0.zip
  cd /tmp
  rm -rf /tmp/build
  ## Need to copy in a config
  cat > /snowplow/config/collector.hocon <<EOF
  collector {
    interface = "0.0.0.0"
    port = "8000"
    production = true

    p3p {
      policyRef = "/w3c/p3p.xml"
      CP = "NOI DSP COR NID PSA OUR IND COM NAV STA"
    }

    crossDomain {
      enabled = true
      domains = [ "*" ]
      secure = true
    }

    cookie {
      enabled = false
      expiration = "365 days"
      name = "snwplw"
      domain = "gitlab.sinter-collect.com"
    }

    doNotTrackCookie {
      enabled = false
      name = "COLLECTOR_DO_NOT_TRACK_COOKIE_NAME"
      value = "COLLECTOR_DO_NOT_TRACK_COOKIE_VALUE"
    }

    cookieBounce {
      enabled = false
      name = "n3pc"
      fallbackNetworkUserId = "00000000-0000-4000-A000-000000000000"
      forwardedProtocolHeader = "X-Forwarded-Proto"
    }

    redirectMacro {
      enabled = false
    }

    cors {
      accessControlMaxAge = 5 seconds
    }

    rootResponse {
      enabled = false
      statusCode = 302
    }

    prometheusMetrics {
      enabled = false
    }

    streams {
      good = "snowplow-raw-good"
      bad = "snowplow-raw-bad"
      useIpAddressAsPartitionKey = true

      sink {
        enabled = kinesis
        region = "us-east-1"
        threadPoolSize = 10

        aws {
          accessKey = iam
          secretKey = iam
        }

        backoffPolicy {
          minBackoff = 10
          maxBackoff = 300000
        }
      }

      buffer {
        byteLimit = 16384
        recordLimit = 1000
        timeLimit = 10000
      }
    }
  }

  akka {
    loglevel = OFF
    loggers = ["akka.event.slf4j.Slf4jLogger"]

    http.server {
      remote-address-header = on
      raw-request-uri-header = on

      parsing {
        max-uri-length = 32768
        uri-parsing-mode = relaxed
      }
    }
  }
  EOF
  chown -R snowplow:snowplow /snowplow
  ## Star the collector service
  su snowplow -g snowplow -c '/usr/bin/java -jar /snowplow/bin/snowplow-stream-collector-kinesis-0.15.0.jar --config /snowplow/config/collector.hocon'
EOUD

  lifecycle {
    create_before_destroy = true
  }
}

resource "aws_launch_configuration" "snowplow_enricher_launch_config" {
  image_id                    = "${data.aws_ami.amazonlinux2.id}"
  instance_type               = "t2.micro"
  associate_public_ip_address = "true"
  enable_monitoring           = "false"
  iam_instance_profile        = "snowplow-enricher-role"

  security_groups = [
    "sg-0270f6c10c30d8bf3",
  ]

  user_data = <<EOUD
  #!/bin/bash
  ## This has, so far, been written to run on Amazon Linux 2 AMI.
  ## Install Java 1.8
  yum -y install java-1.8.0-openjdk
  ## Set up user, group, and install location
  groupadd snowplow
  adduser --system --gid snowplow snowplow
  mkdir -p /snowplow
  mkdir -p /snowplow/config
  ## Install SnowPlow Kinesis Collector
  mkdir -p /tmp/build
  cd /tmp/build
  wget -q http://dl.bintray.com/snowplow/snowplow-generic/snowplow_stream_enrich_kinesis_0.21.0.zip
  unzip -d /snowplow/bin snowplow_stream_enrich_kinesis_0.21.0.zip
  cd /tmp
  rm -rf /tmp/build
  ## We need an IGLU Resolver config
  cat > /snowplow/config/iglu_resolver.json <<EOJ
  {
    "schema": "iglu:com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-1",
    "data": {
      "cacheSize": 500,
      "repositories": [
        {
          "name": "Iglu Central",
          "priority": 0,
          "vendorPrefixes": [ "com.snowplowanalytics" ],
          "connection": {
            "http": {
              "uri": "http://iglucentral.com"
            }
          }
        },
        {
          "name": "Iglu Central - GCP Mirror",
          "priority": 1,
          "vendorPrefixes": [ "com.snowplowanalytics" ],
          "connection": {
            "http": {
              "uri": "http://mirror01.iglucentral.com"
            }
          }
        }
      ]
    }
  }
  EOJ
  ## Need to copy in a config
  cat > /snowplow/config/enricher.hocon <<EOF
  enrich {
    production = true

    streams {
      in {
        raw = "snowplow-raw-good"
      }

      out {
        enriched = "snowplow-enriched-good"
        bad = "snowplow-enriched-bad"
        partitionKey = "user_ipaddress"
      }

      sourceSink {
        enabled = kinesis

        aws {
          accessKey = iam
          secretKey = iam
        }

        region = "us-east-1"
        maxRecords = 10000
        initialPosition = TRIM_HORIZON
        backoffPolicy {
          minBackoff = 10
          maxBackoff = 300000
        }
      }

      buffer {
        byteLimit = 16384
        recordLimit = 1000
        timeLimit = 10000
      }

      appName = "SnowplowEnrich-gitlab-us-east-1"
    }
  }
  EOF
  chown -R snowplow:snowplow /snowplow
  ## Star the collector service
  su snowplow -g snowplow -c '/usr/bin/java -jar /snowplow/bin/snowplow-stream-enrich-kinesis-0.21.0.jar --config /snowplow/config/enricher.hocon --resolver file:/snowplow/config/iglu_resolver.json'
EOUD

  lifecycle {
    create_before_destroy = true
  }
}

resource "aws_launch_configuration" "snowplow_s3loader_launch_config" {
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  image_id                    = "${data.aws_ami.amazonlinux2.id}"
  instance_type               = "t2.micro"
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  associate_public_ip_address = "true"
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  enable_monitoring           = "false"
  iam_instance_profile        = "snowplow-s3loader-role"
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  security_groups = [
    "sg-0270f6c10c30d8bf3",
  ]

  user_data = <<EOUD
  #!/bin/bash
  ## This has, so far, been written to run on Amazon Linux 2 AMI.
  ## Install Java 1.8
  yum -y install java-1.8.0-openjdk lzop lzo-devel
  ## Set up user, group, and install location
  groupadd snowplow
  adduser --system --gid snowplow snowplow
  mkdir -p /snowplow
  mkdir -p /snowplow/config
  ## Install SnowPlow Kinesis Collector
  mkdir -p /tmp/build
  cd /tmp/build
  wget -q http://dl.bintray.com/snowplow/snowplow-generic/snowplow_s3_loader_0.6.0.zip
  unzip -d /snowplow/bin snowplow_s3_loader_0.6.0.zip
  cd /tmp
  rm -rf /tmp/build
  ## Need to copy in a config
  cat > /snowplow/config/s3loader.hocon <<EOF
  source = "kinesis"

  sink = "kinesis"

  aws {
    accessKey = "iam"
    secretKey = "iam"
  }

  nsq {
    channelName = "noidea"
    host = "snowplownsq.gitlab.com"
    port = 8085
    lookupPort = 8090
  }

  kinesis {
    initialPosition = "LATEST"
    maxRecords = 5
    region = "us-east-1"
    appName = "SnowplowS3Loader-gitlab-us-east-1"
  }

  streams {
    inStreamName = "snowplow-enriched-good"
    outStreamName = "snowplow-s3loader-bad"
    buffer {
      byteLimit = 16384
      recordLimit = 1000
      timeLimit = 10000
    }
  }

  s3 {
    region = "us-east-1"
    bucket = "gitlab-com-snowplow-test-one"
    format = "gzip"
    maxTimeout = 120000000
  }
  EOF
  chown -R snowplow:snowplow /snowplow
  ## Star the collector service
  su snowplow -g snowplow -c '/usr/bin/java -jar /snowplow/bin/snowplow-s3-loader-0.6.0.jar --config /snowplow/config/s3loader.hocon'
EOUD

  lifecycle {
    create_before_destroy = true
  }
}
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// EC2 Auto Scaling Groups
resource "aws_autoscaling_group" "snowplow_collector_autoscaling_group" {
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  launch_configuration = "${aws_launch_configuration.snowplow_collector_launch_config.id}"
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  max_size             = "3"
  min_size             = "3"

  tag {
    key                 = "environment"
    value               = "SnowPlow"
    propagate_at_launch = true
  }

  tag {
    key                 = "Name"
    value               = "SnowPlowAutoCollector"
    propagate_at_launch = true
  }
}

resource "aws_autoscaling_group" "snowplow_enricher_autoscaling_group" {
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  launch_configuration = "${aws_launch_configuration.snowplow_enricher_launch_config.id}"
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  max_size             = "3"
  min_size             = "3"

  tag {
    key                 = "environment"
    value               = "SnowPlow"
    propagate_at_launch = true
  }

  tag {
    key                 = "Name"
    value               = "SnowPlowAutoEnricher"
    propagate_at_launch = true
  }
}

resource "aws_autoscaling_group" "snowplow_s3loader_autoscaling_group" {
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  launch_configuration = "${aws_launch_configuration.snowplow_s3loader_launch_config.id}"
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  max_size             = "1"
  min_size             = "1"

  tag {
    key                 = "environment"
    value               = "SnowPlow"
    propagate_at_launch = true
  }

  tag {
    key                 = "Name"
    value               = "SnowPlowAutoS3Loader"
    propagate_at_launch = true
  }
}