Debugging CodeDeployment on AWS

Debugging CodeDeployment on AWS

This article is being written well after I have already installed the CodeDeployment daemon on an ubuntu server,   created an AMI out of it and set it up as an auto launch server from a Scaling Group.

I am documenting the process I went through to dig into the error a bit more, this helps to identify and remember where the logs files are and how to get additional information,  even if the issue is never the same again.

Issues with running the codedeployment showed up as a python error in the log

more /var/log/aws/codedeploy-agent/codedeployment-agent.log 
 put_host_command_complete(command_status:"Failed",diagnostics:{format:"JSON",payload:"{"error_code":5,"script_name":"","message":"not opened for reading","log":""}"

I decided this is not enough information to troubleshoot an error so I had to dig in and fina way to make it more verbose.   I found this file,   just update verbose from false to true

vi /etc/codedeploy-agent/conf/codedeployagent.yml

Then restart the codedeploy-agent

/etc/init.d/code-deployagent restart

This can take quite a while since it runs quite a bit of background installing and checking for duplicate processes. but once it is complete you can check that the process is running again.

ps ax|grep codedeploy

Once this is running in verbose mode,   monitor the log

tail -f /var/log/aws/codedeploy-agent/codedeployment-agent.log 

and re-run the deployment and view the results of the log,  the most useful thing for me was to grep for the folder that more specific error information was written to.

grep -i "Creating deployment" /var/log/aws/codedeploy-agent/codedeployment-agent.log

This showed me the folder that all of the code WAS going to be extracted to,   since there was an error the system actually dumped the contents of an error into a file called bundle.tar in the folder that it would have exported to.

cat /opt/codedeploy-agent/deployment-root/7ddce865-0611-45f0-bf74-459fcf806f23/d-YK4NWBJD7/bundle.tar

This returned an error from the S3 showing that the Code Deploy was having an error downloading from S3,  so I had to add access to the policy to download from S3 buckets as well