code build is failed with Error while executing command: npm install. Reason: exit status 127

Question

I created a code pipeline with very simple code and connected to codecommit. tried to build it but it is failing at codebuild step stating error executing npm install Am I missing something. Sorry I was new to this codebuild/ codepipeline

below is the log for codebuild failure

[Container] 2019/02/15 11:47:39 Waiting for agent ping 
[Container] 2019/02/15 11:47:40 Waiting for DOWNLOAD_SOURCE 
[Container] 2019/02/15 11:47:40 Phase is DOWNLOAD_SOURCE 
[Container] 2019/02/15 11:47:40 CODEBUILD_SRC_DIR=/codebuild/output/src501317273/src 
[Container] 2019/02/15 11:47:40 YAML location is /codebuild/output/src501317273/src/buildspec.yml 
[Container] 2019/02/15 11:47:40 Processing environment variables 
[Container] 2019/02/15 11:47:40 Moving to directory /codebuild/output/src501317273/src 
[Container] 2019/02/15 11:47:40 Registering with agent 
[Container] 2019/02/15 11:47:40 Phases found in YAML: 1 
[Container] 2019/02/15 11:47:40 BUILD: 2 commands 
[Container] 2019/02/15 11:47:40 Phase complete: DOWNLOAD_SOURCE Success: true 
[Container] 2019/02/15 11:47:40 Phase context status code: Message: 
[Container] 2019/02/15 11:47:40 Entering phase INSTALL 
[Container] 2019/02/15 11:47:40 Phase complete: INSTALL Success: true 
[Container] 2019/02/15 11:47:40 Phase context status code: Message: 
[Container] 2019/02/15 11:47:40 Entering phase PRE_BUILD 
[Container] 2019/02/15 11:47:40 Phase complete: PRE_BUILD Success: true 
[Container] 2019/02/15 11:47:40 Phase context status code: Message: 
[Container] 2019/02/15 11:47:41 Entering phase BUILD 
[Container] 2019/02/15 11:47:41 Running command npm install 
sh: 1: npm: not found 

[Container] 2019/02/15 11:47:41 Command did not exit successfully npm install exit status 127 
[Container] 2019/02/15 11:47:41 Phase complete: BUILD Success: false 
[Container] 2019/02/15 11:47:41 Phase context status code: COMMAND_EXECUTION_ERROR Message: Error while executing command: npm install. Reason: exit status 127 
[Container] 2019/02/15 11:47:41 Entering phase POST_BUILD 
[Container] 2019/02/15 11:47:41 Phase complete: POST_BUILD Success: true 
[Container] 2019/02/15 11:47:41 Phase context status code: Message: 
[Container] 2019/02/15 11:47:41 Expanding base directory path: . 
[Container] 2019/02/15 11:47:41 Assembling file list 
[Container] 2019/02/15 11:47:41 Expanding . 
[Container] 2019/02/15 11:47:41 Expanding artifact file paths for base directory . 
[Container] 2019/02/15 11:47:41 Assembling file list 
[Container] 2019/02/15 11:47:41 Expanding post-saml.yaml 
[Container] 2019/02/15 11:47:41 Skipping invalid artifact path post-saml.yaml 
[Container] 2019/02/15 11:47:41 Expanding beta.json 
[Container] 2019/02/15 11:47:41 Found 1 file(s) 
[Container] 2019/02/15 11:47:41 Phase complete: UPLOAD_ARTIFACTS Success: true 
[Container] 2019/02/15 11:47:41 Phase context status code: Message: 

my buildspec.yml file looks like this

version: 0.0
environment_variables:
    plaintext:
        "INPUT_FILE": "serverless.yml"
        "S3_BUCKET": ""
containers:
    LambdaFunctions:
        phases:
            during_build:
                commands:
                    - npm install
                    - aws cloudformation package --template $INPUT_FILE --s3-bucket $S3_BUCKET --output-template post-saml.yaml
        artifacts:
            files:
                - post-saml.yaml
                - beta.json

Thanks in advance for the help

Answer 1

The error message is a few lines down your logs : sh: 1: npm: not found.

This means the npm command is not available in the build environment. Did you correctly select a nodejs build ?

When you create a build environment, you have to specify the operating system and the runtime. It is very unlikely here that you did not specifcy nodejs as runtime.

See step by step guide here : https://docs.aws.amazon.com/codebuild/latest/userguide/getting-started.html#getting-started-create-build-project

See documentation here : https://docs.aws.amazon.com/codebuild/latest/userguide/build-env-ref-available.html

And see a screenshot from my console here :