CloudFoundry: Enabling Java remote debugging with Eclipse

Remote debugging of Java applications from an IDE can be essential when debugging difficult issues.  There is no reason to give this functionality up just because you are deploying to a container in Cloud Foundry.

In this article we’ll go over how to enable remote debugging from a local Eclipse IDE to a public CF provider like Pivotal CloudFoundry.

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CloudFoundry: PCF Dev for local development on Ubuntu

PCF Dev is a distribution of Cloud Foundry that has a minimal footprint and is designed to run locally on a developer’s machine.  Using this lightweight distribution of Cloud Foundry, a developer can debug and deploy applications locally.

In this article, we’ll go through the installation of PCF Dev on an Ubuntu development host.

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Nginx: Custom access log format and error levels

Nginx is a powerful application level proxy server.  Whether for troubleshooting or analysis, enabling log levels and custom formats for the access/error logs is a common requirement.

Error Logs

By default, only messages in the error category are logged.  If you want to enable more details, then modify nginx.conf like:

error_log file [level]

Enabling debug level on Linux would usually look like:

error_log /var/log/nginx/error.log debug;

Access Logs

Access logs and their format are also customized in nginx.conf.  By default, if no format is specified then the combined format is used.

access_log file [format]

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AppDynamics: Enabling verbose debug logs for Agents

Enabling verbose logs for an AppDynamics machine or database agents can be invaluable for troubleshooting connectivity or network issues.

Luckily, this is easily done by editing the conf/logging/log4j.xml file.  By default, only the error level messages are sent to the logs:

  <priority value="error"/>
  <appender-ref ref="FileAppender"/>

But you can modify this so that debug level is sent:

  <priority value="debug"/>
  <appender-ref ref="FileAppender"/>

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