Already on GitHub? Resource: aws_flow_log. just a follow-up question @acdha: did the workaround not behave as expected in Terraform 0.13 vs. 0.12? Three years ago, we have been doing cloud infrastructures with Terraform 0.11. AWS VPC provides features that help with security using security groups, network access control list, flow logs. We will configure publishing of the collected data to Amazon CloudWatch Logs group but S3 can also be used as destination. AWS defines flow log as: VPC Flow Logs is a feature that enables you to capture information about the IP traffic going to and from network interfaces in your VPC. hashicorp/terraform-provider-aws latest version 3.14.1. If you need to have VPC Flow Logs for subnet or ENI, you have to manage it outside of this module with aws_flow_log resource. A terraform module to set up your AWS account with the reasonably secure configuration baseline. This module supports enabling or disabling VPC Flow Logs for entire VPC. For more information, see Flow log records . What else can I do to troubleshoot this? That is exactly what I did and it’s working well. Flow log data can be published to Amazon CloudWatch Logs or Amazon S3. Flow Logs enables you to capture information about the IP traffic going to and from network interfaces in your VPC. After you've created a flow log, you can retrieve and view its data in the chosen destination. The log group will be created approximately 15 minutes after you create a new Flow Log. This module is meant for use with Terraform 0.12. Terraform in the IBM Cloud Schematics service is used to create all of the resources except the flow log collector, which is created using the ibmcloud cli. In the meantime I would recommend using a replace method like described here #14214 (comment) to handle the perpetual diff. This account is configured the same way with AWS-KMS on the S3 bucket. After releasing 0.13, people faced a lot of instability and crashes. Update: When the S3 bucket is reconfigured to use AES-256 as the default encryption (instead of KMS) the VPC flow logs get written normally. By default, the record includes values for the different components of the IP flow, including the source, destination, and protocol. And the result of aws ec2 describe-flow-logs: Curiously, it works fine in my second "sandbox" AWS account where I exclusively use the AWS web console, never Terraform. Provides a VPC/Subnet/ENI Flow Log to capture IP traffic for a specific network interface, subnet, or VPC. terraform-aws-vpc / vpc-flow-logs.tf Go to file Go to file T; Go to line L; Copy path Cannot retrieve contributors at this time. The correct syntax for that would be aws.other-ca-central-1 (with a period rather than a dash), and in Terraform 0.12 you don't need to quote those references although Terraform 0.12 will accept it if you do, for compatibility with 0.11. – Martin Atkins Nov 6 '19 at 15:43 string "VPC-Flow-Logs-Publisher" no: vpc_iam_role_policy_name: The name of the IAM Role Policy which VPC Flow Logs will use. string "VPC-Flow-Logs-Publish-Policy" no: vpc_log_group_name: The name of CloudWatch Logs group to which VPC Flow Logs are delivered. If the flow log captures data for a VPC, the flow log publishes flow log records for all of the network interfaces in the selected VPC. When we create a VPC, we must specify a … Use an early-bird release. Please enable Javascript to use this application S3 bucket policy includes statements to allow VPC flow logs delivery from delivery.logs.amazonaws.com as written in Publishing flow logs to Amazon S3. Note to future self (and others): to have the aws_cloudwatch_log_group data source behave on-par with the resource's ARN handling, this would need to be handled in the next major release as it introduces a breaking-change. Default encryption is enabled and and Custom KMS arn is selected. Have a question about this project? # Terraform template to have VPC flow logs be sent to AWS Lambda: provider "aws" {region = "us-west-2"} resource "aws_cloudwatch_log_group" "vpc_flow_log_group" {name = "vpc-flow-log-group" retention_in_days = 1} resource "aws_flow_log" "vpc_flow_log" {# log_group_name needs to exist before hand See the modules directory for the various sub modules usage. On this page Terraform module for enabling flow logs for vpc and subnets. Conditional creation Sometimes you need to have a way to create VPC resources conditionally but Terraform does not allow to use count inside module block, so the solution is to specify argument create_vpc . Flow logs can be configured to capture all traffic, only traffic that is accepted, or only traffic that is rejected. The aws_flow_log Terraform resource is configured exactly according to the documentation. This project is part of our comprehensive "SweetOps" approach towards DevOps. Turns out I was missing one very important line in my KMS key policy: Now it works fine, and my full policy looks like this: Click here to upload your image 1&1 11 . Enabling VPC Flow Logs. The aws_flow_log Terraform resource is configured exactly according to the documentation. New Flow Logs will appear in the Flow Logs tab of the VPC dashboard. The flow log will capture IP traffic information for a given VPC, subnet, or Elastic Network Interface (ENI). Most configurations are based on CIS Amazon Web Services Foundations v1.2.0. Conditional creation The Flow Logs are saved into log groups in CloudWatch Logs. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Compatibility. Flow log data can be published to Amazon CloudWatch Logs or Amazon S3. The text was updated successfully, but these errors were encountered: Hi @acdha, thank you for creating this issue. Protokolle werden an eine CloudWatch-Protokollgruppe gesendet. Bietet ein VPC / Subnetz / ENI-Ablaufprotokoll zum Erfassen des IP-Verkehrs für eine bestimmte Netzwerkschnittstelle, ein bestimmtes Subnetz oder eine bestimmte VPC. (max 2 MiB). You signed in with another tab or window. Deliver VPC Flow Logs to S3 when you require simple, cost-effective archiving of your log events. Sure thing @acdha! aws_flow_log. Example Usage ... $ terraform import aws_flow_log.test_flow_log fl-1a2b3c4d. We’ll occasionally send you account related emails. Even after trying many permutations of policies for KMS and the S3 bucket, the flow logger still always ends up in Access error status. This module is meant for use with Terraform 0.12. It's definitely not hard to work around so I wonder whether this could be perhaps addressed by simply updating the documentation (it seems like more trouble than it'd be worth to add something like an accessor which trims it). After I believe the diff occurs b/c #14214 removed the trailing suffix in the cloudwatch_log_group resource, but not in the data-source and behind the scenes, the aws_flow_log resource automatically trims the configured log_destination value's :* suffix as seen here. VPC Flow Log allows to capture IP traffic for a specific network interface (ENI), subnet, or entire VPC. Alternatively, our recommendation is to use Amazon S3, as this provides the easiest method of scalability and log … When you create a flow log, you can use the default format for the flow log record, or you can specify a custo… 030-create-vpc.sh creates the VPC, subnets, instances and flow log collectors. aws_flow_log. If you or someone who comes across this issue wants to submit a PR with the documentation update we'll be happy to review it 😄, I'm going to leave this issue open in the meantime as it can still be addressed in the data-source code but further down the line in the next major release 👍. Usage You can go to the examples folder, however the usage of the module could be like this in your own main.tf file: We waited literally years for Terraform 0.12 that brought for loops, dynamic expressions and HCL revamp, but we did not get promised iterations on modules, which were released with Terraform 0.13. Overview Documentation ... aws_ flow_ log aws_ internet_ gateway aws_ main_ route_ table_ association aws_ nat_ gateway aws_ network_ acl ... vpc_id - (Optional) The ID of the requester VPC of the specific VPC Peering Connection to retrieve. The logs can be published to Amazon CloudWatch Logs or an S3 bucket. If you haven't upgraded and need a Terraform 0.11.x-compatible version of this module, the last released version intended for Terraform 0.11.x is 0.8.0. You can access them via the CloudWatch Logs dashboard. So it's definitely a KMS problem. Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request, If you are interested in working on this issue or have submitted a pull request, please leave a comment, Terraform would update the flog log once and not attempt to recreate it on every run. I'm at a loss here. Configuration in this directory creates a set of VPC resources with VPC Flow Logs enabled in different configurations: Terraform module for enabling flow logs for vpc and subnets. The name of the IAM Role which VPC Flow Logs will use. See the modules directory for the various sub modules usage. KMS key policy includes a statement that allows usage by VPC Flow logs as instructed by Required CMK key policy for use with SSE-KMS buckets. AWS VPC flow logs. Terraform 0.11 . Sub modules are provided for creating individual vpc, subnets, and routes. Enable VPC Flow Logs with the default VPC in all regions. Compatibility. I'm using Terraform and trying to set up automatic export of VPC flow logs into an S3 bucket in the same AWS account and region (ca-central-1) that has default encryption turned on with AWS-KMS (using a CMK). By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. By default, each record captures a network internet protocol (IP) traffic flow (characterized by a 5-tuple on a per network interface basis) that occurs within an aggregation interval, also referred to as a capture window. ... Terraform thinks you want to … ... $ terraform import aws_flow_log.test_flow_log fl-1a2b3c4d Terraform 0.11.7 . Published 7 days ago. Both accounts seem to have the same configuration, so I can't figure out why it works in the sandbox, but fails in my terraformed account. VPC Flow logs can be sent to either CloudWatch Logs or an S3 Bucket. 6 comments Labels. Log groups can be subscribed to a Kinesis Stream for analysis with AWS Lambda. VPC Flow Logs is an AWS feature which makes it possible to capture IP traffic information traversing the network interfaces in the VPC. Logs are sent to a CloudWatch Log Group or a S3 Bucket. privacy statement. Most configurations are based on CIS Amazon Web Services Foundations v1.3.0 and AWS Foundational Security Best Practices v1.0.0. AWS defines flow log as: VPC Flow Logs is a feature that enables you to capture information about the IP traffic going to and from network interfaces in your VPC. After the script completes, check out the flow log collector configuration in the IBM Cloud Console. By clicking “Sign up for GitHub”, you agree to our terms of service and terraform-aws-cloudwatch-flow-logs. It's … This Terraform Module creates a VPC flow log. So it's definitely a KMS problem. Terraform Aws Secure Baseline is a terraform module to set up your AWS account with the secure baseline configuration based on CIS Amazon Web Services Foundations.. Terraform Module Registry. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy, 2020 Stack Exchange, Inc. user contributions under cc by-sa, https://devops.stackexchange.com/questions/11623/troubleshooting-vpc-flow-logs-with-an-s3-bucket-using-sse-kms-encryption-with-cm/11624#11624, Troubleshooting VPC flow logs with an S3 bucket using SSE-KMS encryption with CMK, Required CMK key policy for use with SSE-KMS buckets. Sign in A flow log record represents a network flow in your VPC. aws_flow_log. Update: When the S3 bucket is reconfigured to use AES-256 as the default encryption (instead of KMS) the VPC flow logs get written normally. A terraform module to set up your AWS account with the reasonably secure configuration baseline. VPC Flow Log. If you need to have VPC Flow Logs for subnet or ENI, you have to manage it outside of this module with awsflowlog resource. Registry . The fugue.resources function allows all resources of both types to be collected.. To create an Amazon S3 bucket for use with flow logs, see Create a Bucket in the … to your account, This is new in Terraform 0.13 and did not happen with 0.12.29 and the AWS provider 3.20, I was not expecting to see this with #14214 having shipped in 3.0.0. 101 lines (77 sloc) 3.31 KB Raw Blame. You can also provide a link from the web. Successfully merging a pull request may close this issue. VPC flow logs don’t make sense without a VPC and therefore are good candidates to be included in a VPC module. Sub modules are provided for creating individual vpc, subnets, and routes. This rule determines if a VPC is valid by ensure there is a flow log resource that references it. VPC with enabled VPC flow log to S3 and CloudWatch logs. Proporciona un registro de flujo VPC / Subnet / ENI para capturar el tráfico de IP para una interfaz de red, subred o VPC específica. breaking-change documentation enhancement service/cloudwatch service/cloudwatchlogs service/ec2. If you need to have VPC Flow Logs for subnet or ENI, you have to manage it outside of this module with aws_flow_log resource. The usage of lines such as resource = vpcs[_] Act as for loops, iterating overall each resource in the list. CloudFormation, Terraform, and AWS CLI Templates: Enable VPC Flow Logs for an existing VPC, subnet or network interface. Take advantage of the different storage classes of S3, such as Amazon S3 Standard-Infrequent Access, or write custom data processing applications using other solutions, such as Amazon Athena. The is_valid_vpc function uses the same feature.. string "default-vpc-flow-logs" no Conditional creation Sometimes you need to have a way to create VPC resources conditionally but Terraform does not allow to use count inside module block, so the solution is to specify argument create_vpc .