snap collector plugin - procstat

The procstat collector takes a specified pid file and collects metrics from the process specified by that pid file.

Getting Started

System Requirements

• golang 1.5+ - needed only for building
• glide - needed for dependencies

Operating systems

All OSs currently supported by plugin:

• Linux/amd64

Build

Build the plugin by running make within the repo:

$ make

This builds the plugin in /build/rootfs/

Run

The configuration for the procstat plugin is in the task file. The pids designated for collection must exist in a pid file.

"workflow": {
  "collect": {
    "metrics": {
      "/staples/procfs/procstat/*/cpu_time_system": {},
      "/staples/procfs/procstat/*/cpu_time_user": {},
      "/staples/procfs/procstat/*/cpu_usage": {},
      "/staples/procfs/procstat/*/fds": {},
      "/staples/procfs/procstat/*/involuntary_context_switches": {},
      "/staples/procfs/procstat/*/memory_rss": {},
      "/staples/procfs/procstat/*/memory_swap": {},
      "/staples/procfs/procstat/*/memory_vms": {},
      "/staples/procfs/procstat/*/numThreads": {},
      "/staples/procfs/procstat/*/process_uptime": {},
      "/staples/procfs/procstat/*/read_bytes": {},
      "/staples/procfs/procstat/*/read_count": {},
      "/staples/procfs/procstat/*/voluntary_context_switches": {},
      "/staples/procfs/procstat/*/write_bytes": {},
      "/staples/procfs/procstat/*/write_count": {}
    },
    "config": {
      "/staples/procfs/procstat":{
        "files":"/tmp/snap.pid:coolio,/tmp/syslog.pid"
      }
    },
    "publish": null
  }
}

• Specify the pid file with the desired name identifier using the format: "files": "<filepath>:<name>,<filepath>:<name>,..."
• Ensure your snap agent is run with the correct permissions to collect from the /proc/<pid>/ file

Roadmap

• Add pgrep functionality for tracking a process in addition to files.

"config": {
  "/staples/procfs/procstat":{
    "files":"/tmp/snap.pid:coolio,/tmp/syslog.pid",
    "pgrep":"mongo,java:cassandra"
  }
}

• Allow for pid interface to manage multiple pids if a file contains more than one or if pgrep returns more than one

If you have suggestions please open up an issue or provide a pull request.