Add NAT provision stack deployer role example #107
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WalkthroughThe pull request introduces several changes to the Elastio NAT Provision Lambda project. It adds a new section to the README for guidance on the "Deployer IAM role" and updates Terraform configurations to create an IAM role and policies necessary for deploying the NAT Gateway Provision Lambda. Additionally, a new CloudFormation stack configuration and a Bash script for deployment and teardown of AWS resources are introduced. Changes
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Actionable comments posted: 4
🧹 Outside diff range and nitpick comments (5)
elastio-nat-provision-lambda/deployer/test/main.tf (3)
1-1: Consider adding explicit provider configuration.While the current provider configuration is valid, it relies on default settings or environment variables. For better clarity and to avoid potential issues in different environments, consider explicitly defining the region and other relevant settings.
Example:
provider "aws" { region = "us-west-2" # or your preferred region }
3-5: LGTM! Consider adding error handling.The approach to read the version from a file is good for maintainability. The use of
path.moduleensures the correct file is read regardless of where the module is called from, and trimming the content removes any potential whitespace.Consider adding error handling in case the file doesn't exist or is empty:
locals { version_file = "${path.module}/../../version" version = fileexists(local.version_file) ? trimspace(file(local.version_file)) : "unknown" }
7-27: LGTM! Consider some minor improvements.The CloudFormation stack resource is well-defined with appropriate configurations. The dynamic template URL construction using the version is good for maintainability.
Consider the following suggestions:
Use a local variable for the S3 bucket URL to improve maintainability:
locals { s3_bucket_url = "https://elastio-prod-artifacts-us-east-2.s3.us-east-2.amazonaws.com" }Consider using variables for the parameters to allow for easier customization:
variable "encrypt_with_cmk" { type = bool default = true } # ... (similar variables for other parameters) resource "aws_cloudformation_stack" "elastio_nat_provision_stack" { # ... parameters = { EncryptWithCmk = var.encrypt_with_cmk # ... (other parameters) } }Add a description to the stack for better documentation:
resource "aws_cloudformation_stack" "elastio_nat_provision_stack" { name = "elastio-nat-provision-lambda" description = "Stack for Elastio NAT Provision Lambda" # ... }elastio-nat-provision-lambda/deployer/test/test.sh (1)
14-23: LGTM: Proper credential handling, but consider adding cleanup.The extraction and export of AWS credentials from the assumed role output is done correctly. Unsetting the AWS_PROFILE is also a good practice to ensure the script uses the assumed role credentials.
However, to enhance security, consider adding a cleanup function to unset these environment variables at the end of the script:
cleanup() { unset AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN } trap cleanup EXITAdd this function at the beginning of the script and the trap command after setting the credentials. This ensures that the sensitive environment variables are cleared when the script exits, regardless of how it exits.
elastio-nat-provision-lambda/README.md (1)
36-39: LGTM! Consider adding a brief explanation of the role's purpose.The new "Deployer IAM role" section is a valuable addition to the README, providing information about automating the deployment process. The reference to the example IAM role and policies is helpful for users.
To further improve this section, consider adding a brief explanation of why a user might need this role and what specific permissions it grants. This context could help users understand the security implications and decide whether they need to use this role.
Here's a suggested expansion:
## Deployer IAM role If you'd like to automate the deployment of the NAT Gateway Provision Lambda CloudFormation stack, you can use the example IAM role and policies to assign to your deployer process IAM identity. This role grants the necessary permissions to create and manage the CloudFormation stack and related resources. The example is available at [`deployer/main.tf`](./deployer/main.tf). Review the permissions granted by this role to ensure they align with your security requirements before using it in your deployment process.
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📒 Files selected for processing (4)
- elastio-nat-provision-lambda/README.md (1 hunks)
- elastio-nat-provision-lambda/deployer/main.tf (1 hunks)
- elastio-nat-provision-lambda/deployer/test/main.tf (1 hunks)
- elastio-nat-provision-lambda/deployer/test/test.sh (1 hunks)
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elastio-nat-provision-lambda/deployer/main.tf
[HIGH] 27-196: Ensure IAM policies does not allow permissions management / resource exposure without constraints
(CKV_AWS_289)
[HIGH] 27-196: Ensure IAM policies does not allow privilege escalation
(CKV_AWS_286)
[HIGH] 27-196: Ensure no IAM policies documents allow "*" as a statement's resource for restrictable actions
(CKV_AWS_355)
[HIGH] 27-196: Ensure IAM policies does not allow write access without constraints
(CKV_AWS_290)
🔇 Additional comments (6)
elastio-nat-provision-lambda/deployer/test/main.tf (1)
1-27: Overall, the Terraform configuration looks good with room for minor improvements.The file successfully defines an AWS CloudFormation stack for the Elastio NAT Provision Lambda, with good practices such as dynamic version handling and appropriate use of tags and capabilities. The suggestions provided in the previous comments aim to enhance maintainability, flexibility, and error handling. These improvements, while not critical, would make the configuration more robust and easier to manage in the long term.
elastio-nat-provision-lambda/deployer/test/test.sh (1)
1-3: LGTM: Proper script setup and error handling.The script starts with the correct shebang line and sets comprehensive error handling options using
set -euxo pipefail. This ensures that the script will exit on errors, print executed commands, and fail on unbound variables, which are all good practices for robust shell scripting.elastio-nat-provision-lambda/README.md (1)
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1-39: README structure and content are well-organized and comprehensive.The addition of the "Deployer IAM role" section enhances the README without disrupting its existing structure. The document continues to provide clear and detailed information about the NAT Gateway Provision Lambda, including deployment instructions, quick-create links for various AWS regions, and update procedures.
The new section complements the existing content by addressing the needs of users who want to automate the deployment process, making the README more comprehensive.
🧰 Tools
🪛 LanguageTool
[uncategorized] ~42-~42: A comma might be missing here.
Context: ...e CFN stack To update the existing CFN stack use the Cloudformation UI or AWS CLI an...(AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA)
elastio-nat-provision-lambda/deployer/main.tf (3)
178-182: Ensureiam:PassRoleaction is securely scopedThe
iam:PassRoleaction allows passing any role that matchesarn:aws:iam::${local.account}:role/*Elastio*. Ensure that this wildcard does not unintentionally include more roles than necessary.To verify the roles that match this pattern, run the following script:
Review the output to confirm that no unintended roles are included.
32-32:⚠️ Potential issueFix missing comma in IAM policy JSON
There is a missing comma after the
"Version"key in the IAM policy JSON object on line 32. This will result in invalid JSON and cause errors during policy creation.Apply this diff to fix the syntax error:
"Version" : "2012-10-17" + , "Statement" : [Likely invalid or redundant comment.
13-13:⚠️ Potential issueFix missing comma in
assume_role_policyJSONThere is a missing comma after the
"Version"key in theassume_role_policyJSON object on line 13. This will result in invalid JSON and cause Terraform to fail parsing the policy.Apply this diff to fix the syntax error:
"Version" : "2012-10-17" + , "Statement" : [Likely invalid or redundant comment.
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (2)
elastio-nat-provision-lambda/README.md (2)
40-45: Add a comma for better readabilityTo improve the readability of the "Updating the CFN stack" section, consider adding a comma after "To update the existing CFN stack".
Here's the suggested change:
-To update the existing CFN stack use the Cloudformation UI or AWS CLI and pass the following CFN template link to replace the existing template: +To update the existing CFN stack, use the Cloudformation UI or AWS CLI and pass the following CFN template link to replace the existing template:🧰 Tools
🪛 LanguageTool
[uncategorized] ~42-~42: A comma might be missing here.
Context: ...e CFN stack To update the existing CFN stack use the Cloudformation UI or AWS CLI an...(AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA)
🪛 Markdownlint
43-43: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
51-57: Add language specifier to the code blockTo improve the formatting and enable syntax highlighting, add a language specifier to the code block.
Here's the suggested change:
-```bash +```bash cd deployer terraform apply -auto-approve cd test ./test.sh</blockquote></details> </blockquote></details> <details> <summary>📜 Review details</summary> **Configuration used: CodeRabbit UI** **Review profile: CHILL** <details> <summary>📥 Commits</summary> Files that changed from the base of the PR and between 2624110fe7b77cef96757fcca6bb5004b61097f5 and 4ae855714db6caa2d5fa0757c0d77a49c5208259. </details> <details> <summary>📒 Files selected for processing (1)</summary> * elastio-nat-provision-lambda/README.md (1 hunks) </details> <details> <summary>🧰 Additional context used</summary> <details> <summary>🪛 LanguageTool</summary><blockquote> <details> <summary>elastio-nat-provision-lambda/README.md</summary><blockquote> [uncategorized] ~42-~42: A comma might be missing here. Context: ...e CFN stack To update the existing CFN stack use the Cloudformation UI or AWS CLI an... (AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA) </blockquote></details> </blockquote></details> <details> <summary>🪛 Markdownlint</summary><blockquote> <details> <summary>elastio-nat-provision-lambda/README.md</summary><blockquote> 43-43: null Fenced code blocks should have a language specified (MD040, fenced-code-language) </blockquote></details> </blockquote></details> </details> <details> <summary>🔇 Additional comments (3)</summary><blockquote> <details> <summary>elastio-nat-provision-lambda/README.md (3)</summary><blockquote> `36-38`: **LGTM: Valuable addition for automation** The new "Deployer IAM role" section is a great addition to the README. It provides useful information for users who want to automate the deployment process and correctly references the example in `deployer/main.tf`. --- `47-50`: **LGTM: Helpful contribution guidelines** The new "Contributing" section is a great addition to the README. It provides clear instructions for contributors on how to test their changes against the deployer IAM role, which is crucial for maintaining the quality of the project. --- Line range hint `1-57`: **Overall improvement to the documentation** The changes to this README file significantly enhance its value for both users and potential contributors. The addition of the "Deployer IAM role" and "Contributing" sections provides important information for automating deployments and maintaining code quality. These updates make the project more accessible and easier to work with. A few minor suggestions have been made to improve readability and formatting. Once these are addressed, the documentation will be in excellent shape. <details> <summary>🧰 Tools</summary> <details> <summary>🪛 LanguageTool</summary><blockquote> [uncategorized] ~42-~42: A comma might be missing here. Context: ...e CFN stack To update the existing CFN stack use the Cloudformation UI or AWS CLI an... (AI_EN_LECTOR_MISSING_PUNCTUATION_COMMA) </blockquote></details> <details> <summary>🪛 Markdownlint</summary><blockquote> 43-43: null Fenced code blocks should have a language specified (MD040, fenced-code-language) </blockquote></details> </details> </blockquote></details> </blockquote></details> </details> <!-- This is an auto-generated comment by CodeRabbit for review status -->
Summary by CodeRabbit
Documentation
New Features
elastio_nat_provision_stack.Chores
test.sh) for deployment and teardown of AWS resources using Terraform.