As enterprises start to embrace serverless paradigm (AWS Lambda), there is an increasing need for guidance on how to set up an automated AWS CodePipeline for the AWS Lambda functions. In enterprises, Microsoft .NET occupy a signifant footprint in technology stack. In the recent times, .NET core is also gaining momentum for various reasons.
When it comes to creating and deploying AWS Lambda functions in .NET core, there are couple of options available. The option #1 is to leverage Visual Studio 2019. The option #2 is to leverage AWS Lambda Dotnet CLI. This repository will cover how to set up an automated AWS CodePipeline for both the options. The detailed steps for creating AWS CodePipeline for option #1 is covered in the sections 2, 2a, to 2g. Also, the detailed steps for creating AWS CodePipeline for option #2 is covered in the sections 3, 3a to 3h.
The following forms the pre-requisite in the windows environment.
- Windows 10 with latest updates.
- Visual Studio 2019 with latest updates.
- AWS toolkit for Visual Studio Version 1.17.0.0
- .NET Core 3.1
- .NET Core Global Tool Amazon.Lambda.Tools Version 4.0.0
Open Visual Studio 2019, View --> Team Explorer --> Manage Connections.
You will see connections of various providers such as AWS Code Commit, Local Git repositories and other hosted providers etc. If you have not configured connection for AWS Code Commit, you can set it up by providing AWS Code Commit Git Https Credentials.
Click 'Create' under AWS CodeCommit provider.
Once the AWS CodeCommit repository is created successfully, you will get a message like "The repository was cloned successfully . Create a new project or solution in the repository." in the Team Explorer.
Go ahead and create a Visual Studio Solution and Project of type AWS Lambda.
Select 'Empty Function' for 'Select Blueprint'.
Open the default aws-lambda-tools-defaults.json created with Visual Studio Project and it should look the following.
{
"Information" : [
"This file provides default values for the deployment wizard inside Visual Studio and the AWS Lambda commands added to the .NET Core CLI.",
"To learn more about the Lambda commands with the .NET Core CLI execute the following command at the command line in the project root directory.",
"dotnet lambda help",
"All the command line options for the Lambda command can be specified in this file."
],
"profile":"sundarprofile",
"region" : "us-east-1",
"configuration" : "Release",
"framework" : "netcoreapp2.1",
"function-runtime":"dotnetcore2.1",
"function-memory-size" : 256,
"function-timeout" : 30,
"function-handler" : "Dotnetlambda4::Dotnetlambda4.Function::FunctionHandler"
}
Make two changes to aws-lambda-tools-defaults.json file. The first one is about the profile. In my local machine, it is pointing to the AWS profile 'sundarprofile' created in Visual Studio. So, change this to default profile. If your's has the 'default' as profile, leave it unchanged. For the second change, add an IAM role that needs to be assumed by Lambda function.
The updated aws-lambda-tools-defaults.json should look like below.
{
"Information": [
"This file provides default values for the deployment wizard inside Visual Studio and the AWS Lambda commands added to the .NET Core CLI.",
"To learn more about the Lambda commands with the .NET Core CLI execute the following command at the command line in the project root directory.",
"dotnet lambda help",
"All the command line options for the Lambda command can be specified in this file."
],
"profile": "default",
"region": "us-east-1",
"configuration": "Release",
"framework": "netcoreapp2.1",
"function-runtime": "dotnetcore2.1",
"function-memory-size": 256,
"function-timeout": 30,
"function-handler": "Dotnetlambda4::Dotnetlambda4.Function::FunctionHandler",
"function-role": "arn:aws:iam::yourawsaccountnumber:role/Sundarfulllambdarole"
}
Add buildspec.yml at the root of the AWS CodeCommit repository.
version: 0.2
env:
variables:
DOTNET_ROOT: /root/.dotnet
secrets-manager:
AWS_ACCESS_KEY_ID_PARAM: CodeBuild:AWS_ACCESS_KEY_ID
AWS_SECRET_ACCESS_KEY_PARAM: CodeBuild:AWS_SECRET_ACCESS_KEY
phases:
install:
runtime-versions:
dotnet: 3.1
pre_build:
commands:
- echo Restore started on `date`
- export PATH="$PATH:/root/.dotnet/tools"
- pip install --upgrade awscli
- aws configure set profile $Profile
- aws configure set region $Region
- aws configure set aws_access_key_id $AWS_ACCESS_KEY_ID_PARAM
- aws configure set aws_secret_access_key $AWS_SECRET_ACCESS_KEY_PARAM
- cd Dotnetlambda4
- cd src
- cd Dotnetlambda4
- dotnet clean
- dotnet restore
build:
commands:
- echo Build started on `date`
- dotnet new -i Amazon.Lambda.Templates::*
- dotnet tool install -g Amazon.Lambda.Tools
- dotnet tool update -g Amazon.Lambda.Tools
- dotnet lambda deploy-function "Dotnetlambda4" --function-role "arn:aws:iam::yourawsaccountnumber:role/Sundarfulllambdarole" --region "us-east-1"The above buildspec.yml installs .NET Core 3.1, sets the path of Dotnet core on the build enviornment and refers the access keys from secret store. It then configures aws cli tool. Finally it installs Amazon Lambda Templates & Amazon Lambda Tools for Dotnet core and deploys the Lambda function dotnet lambda cli.
Navigate to the directory where the AWS CodeCommit repository is cloned locally. Execute the following commands to push changes to remote AWS CodeCommit repository.
git add --all
git commit --all
git push
Proceed to define AWS CodePipeline for deploying Lambda functions.
Name the Pipeline with any arbitrary name.
Select 'AWS CodeCommit' as SourceProvider and also pick the right repository and branch.
Select 'AWS CodeBuild' as Build provider.
Proceed to create a new CodeBuild project. Name the project with any arbitrary name. For Environment select 'Managed Image' as Environment Image and 'Ubuntu' as operating system.
Select 'aws/codebuild/standard:4.0' as Image and 'Always use the latest image for this runtime version' for Image version.
Now you can see the successful creation of AWS CodeBuild project.
Proceed to define these four environment variables Profile, Region, and SecretAccessKey in the CodeBuild environment settings.
To configure AWS CLI on the CodeBuild environment the parameters such as Region, Profile, AccessKeyId and SecretAccessKey need to be configure. The Region and Profile can be configured as part of environment variables in CodeBuild. The AccessKeyId and SecretAccessKey needs to be configured in AWS SecretsManager.
Navigate to AWS Secrets Manager --> Store a new secret --> Select other types of secrets (API Key).
Configure AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY and its associated values.
Select 'DefaultEncryptionKey' for the encryption key. Click Next and name the 'Secret name' as CodeBuild.
Leave the rest of selections as default and finally proceed to store the secret.
The CodeDeploy is an optional stage in the AWS CodePipeline. Skip this to complete the creation of the AWS CodePipeline.
The following things need to be ensured for the successful CodeBuild exectuion.
- Name of Profile mentioned in the aws-lambda-tools-defaults.json should match with Profile set in the Environment section of Codebuild.
- The attribute "function-role" needs to be mandatorily set with an appropriate IAM role in the aws-lambda-tools-defaults.json.
- The 'Dotnet lambda deploy-function' should be invoked from the directory where the .csproj of lambda project lives.
Save the creation of AWS CodePipeline. Push the code changes of Lambda function from local repository to remote AWS CodeCommit repository.
After few seconds, you should see the trigger of AWS CodeCommit stage and transition to AWS CodeBuild stage. Then AWS Code Pipeline should complete successfully after few minutes.
You can also see the successful creation of AWS Lambda function from AWS Code Pipeline.
This completes the section 2.
In this section, i'll cover how to setup an AWS CodePipeline for Lambda functions created using 'AWS Dotnet Lambda CLI'. This will be useful for MacOS and Linux environments.
Here is the typical development environment that you will need.
- Mac OS lates version or Linux (supported distros for .NET core 3.1) with latest updates.
- AWS Dotnet Lambda CLI
- .NET Core 3.1
- .NET Core Global Tool Amazon.Lambda.Tools Version 4.0.0
Create an AWS CodeCommit repositry in the console.
Clone the repository locally using Git credentials.
Install the nuget package 'Amazon.Lambda.Templates' to have all the AWS Lambda templates in the environment.
dotnet new -i Amazon.Lambda.Templates
Verify the installation by issuing this command.
dotnet new -all
You should see the following output and many more .NET core template types listed there.
Navigate to the cloned repository (created in section #3a) and Create an AWS Lambda function using the below command.
dotnet new lambda.EmptyFunction --name Dotnetlambda4 --profile default --region us-east-1
Make two changes to aws-lambda-tools-defaults.json file. The first one is about the profile. In my local machine, it is pointing to the AWS profile 'sundarprofile' created in Visual Studio. So, change this to default profile. If your's has the 'default' as profile, leave it unchanged. For the second change, add an IAM role that needs to be assumed by Lambda function.
The updated aws-lambda-tools-defaults.json should look like below.
{
"Information" : [
"This file provides default values for the deployment wizard inside Visual Studio and the AWS Lambda commands added to the .NET Core CLI.",
"To learn more about the Lambda commands with the .NET Core CLI execute the following command at the command line in the project root directory.",
"dotnet lambda help",
"All the command line options for the Lambda command can be specified in this file."
],
"profile":"default",
"region" : "us-east-1",
"configuration" : "Release",
"framework" : "netcoreapp2.1",
"function-runtime":"dotnetcore2.1",
"function-memory-size" : 256,
"function-timeout" : 30,
"function-handler" : "Dotnetlambda4::Dotnetlambda4.Function::FunctionHandler",
"function-role": "arn:aws:iam::awsaccountno:role/IAMrole"
}
Add buildspec.yml at the root of the AWS CodeCommit repository. I mean, add it to the root of the local CodeCommit repository. It should look like the following.
version: 0.2
env:
variables:
DOTNET_ROOT: /root/.dotnet
secrets-manager:
AWS_ACCESS_KEY_ID_PARAM: CodeBuild:AWS_ACCESS_KEY_ID
AWS_SECRET_ACCESS_KEY_PARAM: CodeBuild:AWS_SECRET_ACCESS_KEY
phases:
install:
runtime-versions:
dotnet: 3.1
pre_build:
commands:
- echo Restore started on `date`
- export PATH="$PATH:/root/.dotnet/tools"
- pip install --upgrade awscli
- aws configure set profile $Profile
- aws configure set region $Region
- aws configure set aws_access_key_id $AWS_ACCESS_KEY_ID_PARAM
- aws configure set aws_secret_access_key $AWS_SECRET_ACCESS_KEY_PARAM
- cd Dotnetlambda4
- cd src
- cd Dotnetlambda4
- dotnet clean
- dotnet restore
build:
commands:
- echo Build started on `date`
- dotnet new -i Amazon.Lambda.Templates::*
- dotnet tool install -g Amazon.Lambda.Tools
- dotnet tool update -g Amazon.Lambda.Tools
- dotnet lambda deploy-function "Dotnetlambda4" --function-role "arn:aws:iam::yourawsaccountnumber:role/Sundarfulllambdarole" --region "us-east-1"Navigate to the directory where the AWS CodeCommit repository is cloned locally. Execute the following commands to push changes to remote AWS CodeCommit repository.
git add --all
git commit --all
git push
Follow the steps mentioned in section 2e for defining an AWS CodePipeline.
Follow the checklist mentioned in section 2f for successful execution of Pipeline.
Save the creation of AWS CodePipeline. Push the code changes of Lambda function from local repository to remote AWS CodeCommit repository. After few seconds, you should see the trigger of AWS CodeCommit stage and transition to AWS CodeBuild stage. Then AWS Code Pipeline should complete successfully after few minutes.
You can also see the successful creation of AWS Lambda function from AWS Code Pipeline.
This completes the section .
This completes the post of creation an automated AWS Code Pipeline for AWS Lambda functions created using the two approaches (mentioned above).
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