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AppDynamics Agent Framework

The AppDynamics Agent Framework causes an application to be automatically configured to work with a bound AppDynamics Service. Note: This framework is disabled by default.

Detection CriterionExistence of a single bound AppDynamics service. The existence of an AppDynamics service defined by the VCAP_SERVICES payload containing a service name, label or tag with app-dynamics or appdynamics as a substring.
Tagsapp-dynamics-agent=<version>
Tags are printed to standard output by the buildpack detect script

User-Provided Service

When binding AppDynamics using a user-provided service, it must have name or tag with app-dynamics or appdynamics in it. The credential payload can contain the following entries.

Name Description
account-access-key The account access key to use when authenticating with the controller
account-name The account name to use when authenticating with the controller
host-name The controller host name
port The controller port
ssl-enabled Whether or not to use an SSL connection to the controller
application-name (Optional) the application's name
node-name (Optional) the application's node name
tier-name (Optional) the application's tier name

To provide more complex values such as the tier-name, using the interactive mode when creating a user-provided service will manage the character escaping automatically. For example, the default tier-name could be set with a value of Tier-$(expr "${VCAP_APPLICATION}" : '.*instance_index[": ]*\([[:digit:]]*\).*') to calculate a value from the Cloud Foundry instance index.

Note: Some credentials were previously marked as "(Optional)" as requirements have changed across versions of the AppDynamics agent. Please see the AppDynamics Java Agent Configuration Properties for the version of the agent used by your application for more details.

Configuration

For general information on configuring the buildpack, including how to specify configuration values through environment variables, refer to Configuration and Extension.

The framework can be configured by modifying the config/app_dynamics_agent.yml file in the buildpack fork. The framework uses the Repository utility support and so it supports the version syntax defined there.

Name Description
default_application_name This is omitted by default but can be added to specify the application name in the AppDynamics dashboard. This can be overridden by an application-name entry in the credentials payload. If neither are supplied the default is the application_name as specified by Cloud Foundry.
default_node_name The default node name for this application in the AppDynamics dashboard. The default value is an expression that will be evaluated based on the instance_index of the application. This can be overridden by a node-name entry in the credentials payload.
default_tier_name This is omitted by default but can be added to specify the tier name for this application in the AppDynamics dashboard. This can be overridden by a tier-name entry in the credentials payload. If neither are supplied the default is the application_name as specified by Cloud Foundry.
repository_root The URL of the AppDynamics repository index (details).
version The version of AppDynamics to use. Candidate versions can be found in this listing.

Additional Resources

The framework can also be configured by overlaying a set of resources on the default distribution. To do this follow one of the options below.

Configuration files are created in this order:

  1. Default AppDynamics configuration
  2. Buildpack default configuration is taken from resources/app_dynamics_agent/default
  3. External Configuration if configured
  4. Local Configuration if configured
  5. Buildpack Fork if it exists

Buildpack Fork

Add files to the resources/app_dynamics_agent directory in the buildpack fork. For example, to override the default app-agent-config.xml add your custom file to resources/app_dynamics_agent/<version>/conf/app-agent-config.xml.

External Configuration

Set APPD_CONF_HTTP_URL to an HTTP or HTTPS URL which points to the directory where your configuration files exist. You may also include a user and password in the URL, like https://user:[email protected].

The Java buildpack will take the URL to the directory provided and attempt to download the following files from that directory:

  • logging/log4j2.xml
  • logging/log4j.xml
  • app-agent-config.xml
  • controller-info.xml
  • service-endpoint.xml
  • transactions.xml
  • custom-interceptors.xml
  • custom-activity-correlation.xml

Any file successfully downloaded will be copied to the configuration directory. The buildpack does not fail if files are missing.

Local Configuration

Set APPD_CONF_DIR to a relative path which points to the directory in your application files where your custom configuration exists.

The Java buildpack will take the app_root + APPD_CONF_DIR directory and attempt to copy the followinig files from that directory:

  • logging/log4j2.xml
  • logging/log4j.xml
  • app-agent-config.xml
  • controller-info.xml
  • service-endpoint.xml
  • transactions.xml
  • custom-interceptors.xml
  • custom-activity-correlation.xml

Any files that exist will be copied to the configuration directory. The buildpack does not fail if files are missing.