amazon web services - How to pass environment variable to the buildspec.yml for AWS codebuild

Amazon web services - How to pass environment variable to the buildspec.yml for AWS codebuild

To pass environment variables to a buildspec.yml file in AWS CodeBuild, you can define these variables in the AWS CodeBuild project settings. Here's how you can do it:

  1. Create or Open Your CodeBuild Project: Go to the AWS Management Console and navigate to the AWS CodeBuild service. Create a new CodeBuild project or open an existing one.

  2. Define Environment Variables: In the CodeBuild project settings, find the section where you can define environment variables. This section may be labeled as "Environment variables", "Environment configuration", or similar.

  3. Add Environment Variables: Add the environment variables that you want to pass to the buildspec.yml file. Each variable should have a name and a value.

  4. Access Environment Variables in buildspec.yml: In your buildspec.yml file, you can access these environment variables using the ${ENV_VAR_NAME} syntax.

Here's an example buildspec.yml file:

version: 0.2 phases: install: runtime-versions: python: 3.8 commands: - echo "Installing dependencies..." build: commands: - echo "Building project..." - echo "Environment variable value: ${ENV_VAR_NAME}"

In this example, ${ENV_VAR_NAME} is an environment variable defined in the CodeBuild project settings. It will be replaced with the actual value of the environment variable during the build process.

  1. Trigger the CodeBuild Project: After defining the environment variables and updating your buildspec.yml file, trigger the CodeBuild project either manually or through a CI/CD pipeline. The build process will automatically pick up the environment variables and use them during the execution of the build steps.

By following these steps, you can pass environment variables to a buildspec.yml file in AWS CodeBuild and use them in your build process.

Examples

1. "How to Pass Environment Variable in AWS CodeBuild buildspec.yml"

Description: Define environment variables directly within the buildspec.yml file to be used during the build process.

version: 0.2 env: variables: ENV_VAR: "value" phases: build: commands: - echo $ENV_VAR

2. "AWS CodeBuild: Using Environment Variables from AWS Secrets Manager in buildspec.yml"

Description: Fetch environment variables from AWS Secrets Manager within the buildspec.yml.

version: 0.2 env: secrets-manager: ENV_VAR: my_secret:ENV_VAR phases: build: commands: - echo $ENV_VAR

3. "AWS CodeBuild: Inject Environment Variables via CodePipeline"

Description: Pass environment variables from AWS CodePipeline to AWS CodeBuild.

version: 0.2 phases: build: commands: - echo $MY_ENV_VAR

CodePipeline Configuration:

{ "pipeline": { "stages": [ { "actions": [ { "name": "Build", "actionTypeId": { "category": "Build", "owner": "AWS", "provider": "CodeBuild", "version": "1" }, "configuration": { "ProjectName": "my-codebuild-project", "EnvironmentVariables": "[{\"name\":\"MY_ENV_VAR\",\"value\":\"my-value\",\"type\":\"PLAINTEXT\"}]" } } ] } ] } }

4. "AWS CodeBuild: Passing Environment Variables via Parameter Store in buildspec.yml"

Description: Use AWS Systems Manager Parameter Store to pass environment variables in the buildspec.yml.

version: 0.2 env: parameter-store: ENV_VAR: "/my/parameter/path" phases: build: commands: - echo $ENV_VAR

5. "How to Use Environment Variables in AWS CodeBuild buildspec.yml for Conditional Logic"

Description: Use environment variables in the buildspec.yml for conditional logic within build commands.

version: 0.2 env: variables: ENV_VAR: "production" phases: build: commands: - if [ "$ENV_VAR" == "production" ]; then echo "Running in production mode"; else echo "Running in development mode"; fi

6. "AWS CodeBuild: Setting Environment Variables Using Scripts in buildspec.yml"

Description: Define environment variables using a script within the buildspec.yml.

version: 0.2 phases: install: commands: - source set_env.sh build: commands: - echo $ENV_VAR

set_env.sh:

#!/bin/bash export ENV_VAR="value_from_script"

7. "Passing Environment Variables to buildspec.yml from AWS Lambda"

Description: Use AWS Lambda to trigger CodeBuild and pass environment variables dynamically.

Lambda Function:

import boto3 codebuild = boto3.client('codebuild') response = codebuild.start_build( projectName='my-codebuild-project', environmentVariablesOverride=[ { 'name': 'ENV_VAR', 'value': 'value_from_lambda', 'type': 'PLAINTEXT' } ] )

buildspec.yml:

version: 0.2 phases: build: commands: - echo $ENV_VAR

8. "AWS CodeBuild: Using Environment Variables from a Config File in buildspec.yml"

Description: Load environment variables from a configuration file in the buildspec.yml.

version: 0.2 phases: install: commands: - source config.env build: commands: - echo $ENV_VAR

config.env:

export ENV_VAR="value_from_config"

9. "AWS CodeBuild: Setting Environment Variables with Export in buildspec.yml"

Description: Use the export command to set environment variables directly in the buildspec.yml.

version: 0.2 phases: build: commands: - export ENV_VAR="value_from_export" - echo $ENV_VAR

10. "Using Environment Variables with AWS CodeBuild Artifacts in buildspec.yml"

Description: Pass environment variables to be used in the artifact's name or location.

version: 0.2 phases: build: commands: - export ENV_VAR="build-1234" - echo "Building artifact with $ENV_VAR" artifacts: files: - '**/*' name: "my-artifact-$ENV_VAR"

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