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* This allows setting up Flow Logs on the Infrastructure VPC, with either/both S3 and CloudWatch destinations. If the S3 destination is deployed, it will also deploy the compatible Glue table/database for AThena, so that we can easily query the logs. An Athena workgroup has also been created, where we can create useful stored queries (The athena output goes to the logging bucket).
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,13 @@ | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Sid": "", | ||
| "Effect": "Allow", | ||
| "Principal": { | ||
| "Service": ${services} | ||
| }, | ||
| "Action": "sts:AssumeRole" | ||
| } | ||
| ] | ||
| } |
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|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Action": [ | ||
| "logs:CreateLogGroup", | ||
| "logs:CreateLogStream", | ||
| "logs:PutLogEvents", | ||
| "logs:DescribeLogGroups", | ||
| "logs:DescribeLogStreams" | ||
| ], | ||
| "Effect": "Allow", | ||
| "Resource": "*" | ||
| } | ||
| ] | ||
| } |
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policies/kms-key-policy-statements/cloudwatch-logs-allow.json.tpl
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| %{if log_group_arn != ""}{ | ||
| "Effect": "Allow", | ||
| "Principal": { | ||
| "Service": "logs.amazonaws.com" | ||
| }, | ||
| "Action": [ | ||
| "kms:Encrypt*", | ||
| "kms:Decrypt*", | ||
| "kms:ReEncrypt*", | ||
| "kms:GenerateDataKey*", | ||
| "kms:Describe*" | ||
| ], | ||
| "Resource": "*", | ||
| "Condition": { | ||
| "ArnEquals": { | ||
| "kms:EncryptionContext:aws:logs:arn": "${log_group_arn}" | ||
| } | ||
| } | ||
| }%{endif} |
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policies/kms-key-policy-statements/log-delivery-allow.json.tpl
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| @@ -0,0 +1,22 @@ | ||
| %{if account_id != ""}{ | ||
| "Effect": "Allow", | ||
| "Principal": { | ||
| "Service": [ "delivery.logs.amazonaws.com" ] | ||
| }, | ||
| "Action": [ | ||
| "kms:Encrypt", | ||
| "kms:Decrypt", | ||
| "kms:ReEncrypt*", | ||
| "kms:GenerateDataKey*", | ||
| "kms:DescribeKey" | ||
| ], | ||
| "Resource": "*", | ||
| "Condition": { | ||
| "StringEquals": { | ||
| "aws:SourceAccount": ["${account_id}"] | ||
| }, | ||
| "ArnLike": { | ||
| "aws:SourceArn": ["arn:aws:logs:${region}:${account_id}:*"] | ||
| } | ||
| } | ||
| }%{endif} |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| resource "aws_athena_workgroup" "infrastructure_vpc_flow_logs" { | ||
| count = local.infrastructure_vpc_flow_logs_s3_with_athena ? 1 : 0 | ||
|
|
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| name = "${local.resource_prefix}-infrastructure-vpc-flow-logs" | ||
|
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| configuration { | ||
| enforce_workgroup_configuration = true | ||
| publish_cloudwatch_metrics_enabled = true | ||
|
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| result_configuration { | ||
| output_location = "s3://${aws_s3_bucket.infrastructure_logs[0].bucket}/${local.infrastructure_vpc_flow_logs_s3_key_prefix}-athena-output" | ||
|
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| encryption_configuration { | ||
| encryption_option = local.infrastructure_kms_encryption ? "SSE_KMS" : "SSE_S3" | ||
| kms_key_arn = local.infrastructure_kms_encryption ? aws_kms_key.infrastructure[0].arn : null | ||
| } | ||
| } | ||
| } | ||
| } |
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| resource "aws_cloudwatch_log_group" "infrastructure_vpc_flow_logs" { | ||
| count = local.infrastructure_vpc_flow_logs_cloudwatch_logs ? 1 : 0 | ||
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| name = "${local.resource_prefix}-infrastructure-vpc-flow-logs" | ||
| retention_in_days = local.infrastructure_vpc_flow_logs_retention | ||
| kms_key_id = local.infrastructure_kms_encryption ? aws_kms_key.infrastructure[0].arn : null | ||
| skip_destroy = true | ||
| } | ||
|
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| resource "aws_iam_role" "infrastructure_vpc_flow_logs" { | ||
| count = local.infrastructure_vpc_flow_logs_cloudwatch_logs ? 1 : 0 | ||
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| name = "${local.resource_prefix}-infrastructure-vpc-flow-logs" | ||
| assume_role_policy = templatefile("${path.root}/policies/assume-roles/service-principle-standard.json.tpl", { | ||
| services = jsonencode(["vpc-flow-logs.amazonaws.com"]) | ||
| }) | ||
| } | ||
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| resource "aws_iam_role_policy" "infrastructure_vpc_flow_logs_allow_cloudwatch_rw" { | ||
| count = local.infrastructure_vpc_flow_logs_cloudwatch_logs ? 1 : 0 | ||
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| name = "${local.resource_prefix}-ecs-vpc-flow-logs-cloudwatch-logs-rw" | ||
| role = aws_iam_role.infrastructure_vpc_flow_logs[0].id | ||
| policy = templatefile("${path.root}/policies/cloudwatch-logs-rw.json.tpl", {}) | ||
| } | ||
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| resource "aws_flow_log" "infrastructure_vpc_flow_logs_cloudwatch" { | ||
| count = local.infrastructure_vpc_flow_logs_cloudwatch_logs ? 1 : 0 | ||
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| iam_role_arn = aws_iam_role.infrastructure_vpc_flow_logs[0].id | ||
| log_destination = aws_cloudwatch_log_group.infrastructure_vpc_flow_logs[0].arn | ||
| traffic_type = local.infrastructure_vpc_flow_logs_traffic_type | ||
| vpc_id = aws_vpc.infrastructure[0].id | ||
| } |
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|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| resource "aws_glue_catalog_database" "infrastructure_vpc_flow_logs" { | ||
| count = local.infrastructure_vpc_flow_logs_s3_with_athena ? 1 : 0 | ||
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| name = "${replace(local.resource_prefix, "-", "_")}_infrastructure_vpc_logs" | ||
| description = "Database for ${local.resource_prefix} VPC flow log tables to be queried with Athena" | ||
| } | ||
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| resource "aws_glue_catalog_table" "infrastructure_vpc_flow_logs" { | ||
| count = local.infrastructure_vpc_flow_logs_s3_with_athena ? 1 : 0 | ||
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| name = "${replace(local.resource_prefix, "-", "_")}_infrastructure_vpc_logs" | ||
| database_name = aws_glue_catalog_database.infrastructure_vpc_flow_logs[0].name | ||
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| dynamic "partition_keys" { | ||
| for_each = local.infrastructure_vpc_flow_logs_glue_table_partition_keys | ||
| content { | ||
| name = partition_keys.key | ||
| type = partition_keys.value | ||
| } | ||
| } | ||
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| parameters = { | ||
| comment = "VPC Flow logs table for ${local.resource_prefix} infrastructure VPC" | ||
| EXTERNAL = "TRUE" | ||
| "skip.header.line.count" = "1" | ||
| "projection.enabled" = "true" | ||
| "projection.region.type" = "enum" | ||
| "projection.region.values" = local.aws_region | ||
| "projection.day.type" = "date" | ||
| "projection.day.range" = "2023/01/01,NOW" | ||
| "projection.day.format" = "yyyy/MM/dd" | ||
| "projection.hour.type" = "integer" | ||
| "projection.hour.range" = "00,23" | ||
| "projection.hour.digits" = "2" | ||
| "storage.location.template" = "s3://${aws_s3_bucket.infrastructure_logs[0].id}/${local.infrastructure_vpc_flow_logs_s3_key_prefix}/AWSLogs/${local.aws_account_id}/vpcflowlogs/$${region}/$${day}/$${hour}" | ||
| } | ||
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| storage_descriptor { | ||
| input_format = "org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat" | ||
| output_format = "org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat" | ||
| location = "s3://${aws_s3_bucket.infrastructure_logs[0].id}/${local.infrastructure_vpc_flow_logs_s3_key_prefix}/AWSLogs/${local.aws_account_id}/vpcflowlogs" | ||
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| ser_de_info { | ||
| parameters = { | ||
| "serialization.format" = "1" | ||
| } | ||
| serialization_library = "org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe" | ||
| } | ||
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| dynamic "columns" { | ||
| for_each = local.infrastructure_vpc_flow_logs_glue_table_columns | ||
| content { | ||
| name = columns.key | ||
| type = columns.value | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| resource "aws_flow_log" "infrastructure_vpc_flow_logs_s3" { | ||
| count = local.infrastructure_vpc_flow_logs_s3_with_athena ? 1 : 0 | ||
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| log_destination_type = "s3" | ||
| log_destination = "${aws_s3_bucket.infrastructure_logs[0].arn}/${local.infrastructure_vpc_flow_logs_s3_key_prefix}" | ||
| traffic_type = local.infrastructure_vpc_flow_logs_traffic_type | ||
| vpc_id = aws_vpc.infrastructure[0].id | ||
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| destination_options { | ||
| file_format = "parquet" | ||
| per_hour_partition = true | ||
| } | ||
| } |