This module is meant for use with Terraform 0.12. 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. The name of the IAM Role which VPC Flow Logs will use. 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 This module is meant for use with Terraform 0.12. 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. VPC Flow logs can be sent to either CloudWatch Logs or an S3 Bucket. privacy statement. Sub modules are provided for creating individual vpc, subnets, and routes. The is_valid_vpc function uses the same feature.. Compatibility. When we create a VPC, we must specify a … breaking-change documentation enhancement service/cloudwatch service/cloudwatchlogs service/ec2. Successfully merging a pull request may close this issue. A terraform module to set up your AWS account with the reasonably secure configuration baseline. Compatibility. On this page Default encryption is enabled and and Custom KMS arn is selected. 6 comments Labels. The text was updated successfully, but these errors were encountered: Hi @acdha, thank you for creating this issue. Log groups can be subscribed to a Kinesis Stream for analysis with AWS Lambda. After releasing 0.13, people faced a lot of instability and crashes. VPC flow logs don’t make sense without a VPC and therefore are good candidates to be included in a VPC module. You can access them via the CloudWatch Logs dashboard. terraform-aws-cloudwatch-flow-logs. After aws_flow_log. The Flow Logs are saved into log groups in CloudWatch Logs. In the meantime I would recommend using a replace method like described here #14214 (comment) to handle the perpetual diff. Provides a VPC/Subnet/ENI Flow Log to capture IP traffic for a specific network interface, subnet, or VPC. The aws_flow_log Terraform resource is configured exactly according to the documentation. 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. That is exactly what I did and it’s working well. For more information, see Flow log records . 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. 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. 030-create-vpc.sh creates the VPC, subnets, instances and flow log collectors. 1&1 11 . # 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 Flow logs can be configured to capture all traffic, only traffic that is accepted, or only traffic that is rejected. ... Terraform thinks you want to … Most configurations are based on CIS Amazon Web Services Foundations v1.3.0 and AWS Foundational Security Best Practices v1.0.0. We’ll occasionally send you account related emails. I'm at a loss here. After the script completes, check out the flow log collector configuration in the IBM Cloud Console. Flow log data can be published to Amazon CloudWatch Logs or Amazon S3. See the modules directory for the various sub modules usage. (max 2 MiB). AWS VPC provides features that help with security using security groups, network access control list, flow logs. string "default-vpc-flow-logs" no This rule determines if a VPC is valid by ensure there is a flow log resource that references it. AWS VPC flow logs. To create an Amazon S3 bucket for use with flow logs, see Create a Bucket in the … 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. Sure thing @acdha! After you've created a flow log, you can retrieve and view its data in the chosen destination. Protokolle werden an eine CloudWatch-Protokollgruppe gesendet. See the modules directory for the various sub modules usage. aws_flow_log. Example Usage ... $ terraform import aws_flow_log.test_flow_log fl-1a2b3c4d. This module supports enabling or disabling VPC Flow Logs for entire VPC. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. When you create a flow log, you can use the default format for the flow log record, or you can specify a custo… 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 . Enable VPC Flow Logs with the default VPC in all regions. If you need to have VPC Flow Logs for subnet or ENI, you have to manage it outside of this module with awsflowlog resource. Three years ago, we have been doing cloud infrastructures with Terraform 0.11. 101 lines (77 sloc) 3.31 KB Raw Blame. Use an early-bird release. Bietet ein VPC / Subnetz / ENI-Ablaufprotokoll zum Erfassen des IP-Verkehrs für eine bestimmte Netzwerkschnittstelle, ein bestimmtes Subnetz oder eine bestimmte VPC. VPC Flow Log allows to capture IP traffic for a specific network interface (ENI), subnet, or entire VPC. What else can I do to troubleshoot this? The fugue.resources function allows all resources of both types to be collected.. The aws_flow_log Terraform resource is configured exactly according to the documentation. 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. ... $ terraform import aws_flow_log.test_flow_log fl-1a2b3c4d Terraform 0.11.7 . So it's definitely a KMS problem. 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). This Terraform Module creates a VPC flow log. Have a question about this project? Terraform module for enabling flow logs for vpc and subnets. string "VPC-Flow-Logs-Publish-Policy" no: vpc_log_group_name: The name of CloudWatch Logs group to which VPC Flow Logs are delivered. Published 7 days ago. 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. Please enable Javascript to use this application You can also provide a link from the web. VPC Flow Log. aws_flow_log. Alternatively, our recommendation is to use Amazon S3, as this provides the easiest method of scalability and log … VPC Flow Logs is an AWS feature which makes it possible to capture IP traffic information traversing the network interfaces in the VPC. just a follow-up question @acdha: did the workaround not behave as expected in Terraform 0.13 vs. 0.12? A terraform module to set up your AWS account with the reasonably secure configuration baseline. 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. 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 Conditional creation 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. 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. Enabling VPC Flow Logs. The flow log will capture IP traffic information for a given VPC, subnet, or Elastic Network Interface (ENI). Deliver VPC Flow Logs to S3 when you require simple, cost-effective archiving of your log events. Even after trying many permutations of policies for KMS and the S3 bucket, the flow logger still always ends up in Access error status. It's … This project is part of our comprehensive "SweetOps" approach towards DevOps. New Flow Logs will appear in the Flow Logs tab of the VPC dashboard. 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. 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. Configuration in this directory creates a set of VPC resources with VPC Flow Logs enabled in different configurations: 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. 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. Proporciona un registro de flujo VPC / Subnet / ENI para capturar el tráfico de IP para una interfaz de red, subred o VPC específica. Registry . Flow log data can be published to Amazon CloudWatch Logs or Amazon S3. 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. By default, the record includes values for the different components of the IP flow, including the source, destination, and protocol. Flow Logs enables you to capture information about the IP traffic going to and from network interfaces in your VPC. 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 👍. You signed in with another tab or window. Terraform 0.11 . 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. Terraform module for enabling flow logs for vpc and subnets. We will configure publishing of the collected data to Amazon CloudWatch Logs group but S3 can also be used as destination. 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. Most configurations are based on CIS Amazon Web Services Foundations v1.2.0. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Logs are sent to a CloudWatch Log Group or a S3 Bucket. The log group will be created approximately 15 minutes after you create a new Flow Log. VPC with enabled VPC flow log to S3 and CloudWatch logs. CloudFormation, Terraform, and AWS CLI Templates: Enable VPC Flow Logs for an existing VPC, subnet or network interface. So it's definitely a KMS problem. 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 flow log record represents a network flow in your VPC. 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 . hashicorp/terraform-provider-aws latest version 3.14.1. string "VPC-Flow-Logs-Publisher" no: vpc_iam_role_policy_name: The name of the IAM Role Policy which VPC Flow Logs will use. 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. This account is configured the same way with AWS-KMS on the S3 bucket. 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. The logs can be published to Amazon CloudWatch Logs or an S3 bucket. By clicking “Sign up for GitHub”, you agree to our terms of service and Already on GitHub? Sign in The usage of lines such as resource = vpcs[_] Act as for loops, iterating overall each resource in the list. Usage You can go to the examples folder, however the usage of the module could be like this in your own main.tf file: 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. Resource: aws_flow_log. 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. 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). Sub modules are provided for creating individual vpc, subnets, and routes. 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Subnets, instances and flow log KB Raw Blame Logs or an S3 bucket a Kinesis Stream for with... '' vpc flow logs terraform towards DevOps you to capture all traffic, only traffic that is accepted, or network... Reasonably secure configuration baseline no: vpc_log_group_name: the name of CloudWatch Logs group but can!