My CDK stack defines a CodePipeline with the following CodeBuild project:
project_build = codebuild.Project(self, "ProjectBuild",
project_name = "Build",
source = github_source,
environment = codebuild.BuildEnvironment(
build_image = codebuild.LinuxBuildImage.AMAZON_LINUX_2_2,
privileged = True),
environment_variables = { … },
build_spec = codebuild.BuildSpec.from_source_filename("cdk/buildspec/build.yml"))
I'm using an Amazon Linux 2 image, and want to install PostgreSQL on it, so I've made this simple buildspec test file:
version: 0.2
phases:
install:
commands:
- amazon-linux-extras install postgresql13
build:
commands:
- echo "foo"
And here is the error raised by the job:
[Container] 2021/10/12 16:50:32 Entering phase INSTALL
[Container] 2021/10/12 16:50:32 Running command amazon-linux-extras
/root/.pyenv/versions/3.8.10/bin/python: No module named amazon_linux_extras
[Container] 2021/10/12 16:50:34 Command did not exit successfully amazon-linux-extras exit status 1
[Container] 2021/10/12 16:50:34 Phase complete: INSTALL State: FAILED
[Container] 2021/10/12 16:50:34 Phase context status code: COMMAND_EXECUTION_ERROR Message: Error while executing command: amazon-linux-extras. Reason: exit status 1
I cannot understand why amazon-linux-extras would be run as a Python module. I've tried with the /usr/bin/amazon-linux-extras absolute path without better success.
I've never had any issue using amazon-linux-extras directly on Amazon Linux instances, but how am I supposed to use it in a CodeBuild context?
It appears the amazon-linux-extras script is only working with Python 2, and is using the python executable.
I need to prefix my command like so to ensure the python2 executable is used:
version: 0.2
phases:
install:
commands:
- PYTHON=python2 amazon-linux-extras enable postgresql13
- yum clean metadata
- yum install postgresql
build:
commands:
- echo "foo"