The agent config file config.cfg (usually at /etc/sd-agent/config.cfg on Linux) allows you to specify a number of config variables: 

Core Config 

• sd_url 
  Your Server Density account URL.
  
  
• agent_key
The agent key to uniquely identify this server. 

Agent behaviour 

• logging_level
  Define what level of logging the agent will do. Default: info. Options: debug, info, error, warn, warning, critical, fatal. 
  
  
• plugin_directory
  Directory Location of plugins for the agent to execute. 
  
  
• tmp_directory
  Location to store the PID and log files when run manually or on Mac or FreeBSD. 
  
  
• pidfile_directory
  Separate configuration for the location of the PID file. 

Applications 

• apache_status_url
  URL to the Apache Status output. 
  
  
• apache_status_user
  Apache status username, if protected. 
  
  
• apache_status_pass
  Apache status password, if protected. 
  
  
• mongodb_server
  The URI to connect to your MongoDB server, can include username, password and port. 
  
  
• mongodb_dbstats
  Whether to collect database statistics from MongoDB. 
  
  
• mongodb_replset
  Whether to collect replication statistics from MongoDB. 
  
  
• mysql_server
  The server address to MySQL. 
  
  
• mysql_user
  The MySQL user to log in as. 
  
  
• mysql_pass
  The MySQL password to log in as. 
  
  
• mysql_port
  Custom port to connect to MySQL. Default: 3306. 
  
  
• mysql_socket
  Custom MySQL socket to use for connecting. 
  
  
• mysql_norepl
  If set (to anything), will disable replication checks. 
  
  
• nginx_status_url
  URL to the nginx status page. 
  
  
• rabbitmq_status_url
  URL for the RabbitMQ status output.
  
  
• rabbitmq_user
  RabbitMQ user.
  
  
• rabbitmq_pass
  RabbitMQ password.