[New Data Source]: add `aws_flow_log` and `aws_cloudwatch_log_subscription_filter`

[lorenzophys]

Description

I am currently implementing a logs observability solution. This implementation requires both a flow log object and a subscription filter for the log group. Having these data sources available would greatly facilitate this process by allowing users to retrieve the necessary information directly within their Terraform configurations.

They both already have a resource block, but lack a data source.

Based on the AWS SDK:

1. aws_cloudwatch_log_subscription_filter attributes: destination_arn, distribution, filter_pattern, log_group_name, role_arn, tags
2. aws_flow_log attributes: flow_logs_status, log_destination, log_destination_type, log_format, log_group_name, max_aggregation_interval, traffic_type, tags

I would be happy to help you implement this.

Requested Resource(s) and/or Data Source(s)

• aws_flow_log
• aws_cloudwatch_log_subscription_filter

Potential Terraform Configuration

# Based on:
# 1. https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/ec2@v1.27.0#DescribeFlowLogsInput
# 2. https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs@v1.27.0#DescribeSubscriptionFiltersInput

data "aws_flow_log" "example" {
  flow_log_id = "fl-1234567890abcdef"
}

data "aws_cloudwatch_log_subscription_filter" "example" {
  log_group_name = "my-log-group"
  filter_name    = "my-subscription-filter"
}

References

1. https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs@v1.27.0/types#SubscriptionFilter
2. https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/ec2@v1.27.0/types#FlowLog

Would you like to implement a fix?

Yes

[github-actions[bot]]

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