How can these requirements be met with the LEAST management overhead and without requiring different script versions for each deployment group?
Tag the Amazon EC2 instances depending on the deployment group. Then place a script into the application revision that calls the metadata service and the EC2 API to identify which deployment group the instance is part of. Use this information to configure the log level settings. Reference the script as part of the Afterinstall lifecycle hook in the appspec.yml file.
Create a script that uses the CodeDeploy environment variable DEPLOYMENT_GROUP_NAME to identify which deployment group the instance is part of. Use this information to configure the log level settings. Reference this script as part of the Beforelnstall lifecycle hook in the appspec.yml file.
Create a CodeDeploy custom environment variable for each environment Then place a script into the application revision that checks this environment variable to identify which deployment group the instance is part of. Use this information to configure the log level settings. Reference this script as part of the ValidateService lifecycle hook in the appspec.yml file.
Create a script that uses the CodeDeploy environment variable DEPLOYMENT_GROUP_ID to identify which deployment group the instance is part of to configure the log level settings. Reference this script as part of the Install lifecycle hook in the appspec.yml file.
Explanations:
Tagging EC2 instances is not the simplest approach. Using the EC2 metadata service and API requires more management overhead and complicates the deployment process unnecessarily, especially since other solutions use built-in CodeDeploy variables.
TheDEPLOYMENT_GROUP_NAMEenvironment variable is automatically set by CodeDeploy for each deployment group, making it an ideal choice to identify the deployment group. Using this information in a script during the BeforeInstall lifecycle hook simplifies the process without requiring additional configurations or metadata handling.
Creating custom environment variables introduces additional management overhead and is not the most efficient solution. CodeDeploy already provides theDEPLOYMENT_GROUP_NAMEvariable, which eliminates the need for custom environment variables.
DEPLOYMENT_GROUP_IDis not a CodeDeploy environment variable available during the deployment process. It would not be practical to use this for dynamically configuring settings like log levels. UsingDEPLOYMENT_GROUP_NAMEin theBeforeInstalllifecycle hook is more straightforward and effective.
I weigh that the answer is:
Create a script that uses the CodeDeploy environment variable DEPLOYMENT_GROUP_NAME to identify which deployment group the instance is part of. Use this information to configure the log level settings. Reference this script as part of the Beforelnstall lifecycle hook in the appspec.yml file.