|
| 1 | +provider "aws" { |
| 2 | + region = local.region |
| 3 | +} |
| 4 | + |
| 5 | +data "aws_availability_zones" "available" {} |
| 6 | + |
| 7 | +locals { |
| 8 | + name = "ex-${basename(path.cwd)}" |
| 9 | + region = "eu-west-1" |
| 10 | + |
| 11 | + vpc_cidr = "10.0.0.0/16" |
| 12 | + azs = slice(data.aws_availability_zones.available.names, 0, 3) |
| 13 | + |
| 14 | + tags = { |
| 15 | + Example = local.name |
| 16 | + GithubRepo = "terraform-aws-vpc" |
| 17 | + GithubOrg = "terraform-aws-modules" |
| 18 | + } |
| 19 | +} |
| 20 | + |
| 21 | +################################################################################ |
| 22 | +# Flow Log |
| 23 | +################################################################################ |
| 24 | + |
| 25 | +module "flow_log" { |
| 26 | + source = "../../modules/flow-log" |
| 27 | + |
| 28 | + name = local.name |
| 29 | + vpc_id = module.vpc.vpc_id |
| 30 | + |
| 31 | + tags = local.tags |
| 32 | +} |
| 33 | + |
| 34 | +module "flow_log_cloudwatch_external" { |
| 35 | + source = "../../modules/flow-log" |
| 36 | + |
| 37 | + name = "${local.name}-cloudwatch-external" |
| 38 | + vpc_id = module.vpc.vpc_id |
| 39 | + |
| 40 | + create_cloudwatch_log_group = false |
| 41 | + log_destination = aws_cloudwatch_log_group.flow_log.arn |
| 42 | + |
| 43 | + create_iam_role = false |
| 44 | + iam_role_arn = aws_iam_role.flow_log_cloudwatch.arn |
| 45 | + |
| 46 | + tags = local.tags |
| 47 | +} |
| 48 | + |
| 49 | +module "flow_log_s3" { |
| 50 | + source = "../../modules/flow-log" |
| 51 | + |
| 52 | + name = "${local.name}-s3" |
| 53 | + vpc_id = module.vpc.vpc_id |
| 54 | + |
| 55 | + log_destination_type = "s3" |
| 56 | + log_destination = module.s3_bucket.s3_bucket_arn |
| 57 | + |
| 58 | + tags = local.tags |
| 59 | +} |
| 60 | + |
| 61 | +module "flow_log_s3_parquet" { |
| 62 | + source = "../../modules/flow-log" |
| 63 | + |
| 64 | + name = "${local.name}-s3-parquet" |
| 65 | + vpc_id = module.vpc.vpc_id |
| 66 | + |
| 67 | + log_destination_type = "s3" |
| 68 | + log_destination = module.s3_bucket.s3_bucket_arn |
| 69 | + destination_options = { |
| 70 | + file_format = "parquet" |
| 71 | + hive_compatible_partitions = true |
| 72 | + per_hour_partition = true |
| 73 | + } |
| 74 | + |
| 75 | + tags = local.tags |
| 76 | +} |
| 77 | + |
| 78 | +module "disabled" { |
| 79 | + source = "../../modules/flow-log" |
| 80 | + |
| 81 | + create = false |
| 82 | +} |
| 83 | + |
| 84 | +################################################################################ |
| 85 | +# Supporting Resources |
| 86 | +################################################################################ |
| 87 | + |
| 88 | +module "vpc" { |
| 89 | + source = "../../" |
| 90 | + |
| 91 | + name = local.name |
| 92 | + cidr = local.vpc_cidr |
| 93 | + |
| 94 | + azs = local.azs |
| 95 | + private_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k)] |
| 96 | + public_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k + 4)] |
| 97 | + |
| 98 | + tags = local.tags |
| 99 | +} |
| 100 | + |
| 101 | +module "s3_bucket" { |
| 102 | + source = "terraform-aws-modules/s3-bucket/aws" |
| 103 | + version = "~> 5.0" |
| 104 | + |
| 105 | + bucket_prefix = "${local.name}-" |
| 106 | + force_destroy = true |
| 107 | + |
| 108 | + # Policy works for flow logs as well |
| 109 | + attach_waf_log_delivery_policy = true |
| 110 | + |
| 111 | + tags = local.tags |
| 112 | +} |
| 113 | + |
| 114 | +resource "aws_cloudwatch_log_group" "flow_log" { |
| 115 | + name_prefix = "/aws/flow-log/vpc/${module.vpc.vpc_id}/${local.name}-external-" |
| 116 | + |
| 117 | + retention_in_days = 7 |
| 118 | + |
| 119 | + tags = local.tags |
| 120 | +} |
| 121 | + |
| 122 | +resource "aws_iam_role" "flow_log_cloudwatch" { |
| 123 | + name_prefix = "${local.name}-external-" |
| 124 | + |
| 125 | + assume_role_policy = jsonencode({ |
| 126 | + Version = "2012-10-17" |
| 127 | + Statement = [ |
| 128 | + { |
| 129 | + Action = "sts:AssumeRole" |
| 130 | + Effect = "Allow" |
| 131 | + Sid = "VPCFlowLogsAssume" |
| 132 | + Principal = { |
| 133 | + Service = "vpc-flow-logs.amazonaws.com" |
| 134 | + } |
| 135 | + }, |
| 136 | + ] |
| 137 | + }) |
| 138 | + |
| 139 | + tags = local.tags |
| 140 | +} |
| 141 | + |
| 142 | +resource "aws_iam_role_policy" "flow_log_cloudwatch" { |
| 143 | + name_prefix = "${local.name}-external-" |
| 144 | + role = aws_iam_role.flow_log_cloudwatch.id |
| 145 | + |
| 146 | + policy = jsonencode({ |
| 147 | + Version = "2012-10-17" |
| 148 | + Statement = [ |
| 149 | + { |
| 150 | + Action = [ |
| 151 | + "logs:CreateLogGroup", |
| 152 | + "logs:CreateLogStream", |
| 153 | + "logs:PutLogEvents", |
| 154 | + "logs:DescribeLogGroups", |
| 155 | + "logs:DescribeLogStreams", |
| 156 | + ] |
| 157 | + Effect = "Allow" |
| 158 | + Resource = aws_cloudwatch_log_group.flow_log.arn |
| 159 | + }, |
| 160 | + ] |
| 161 | + }) |
| 162 | +} |
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