MON (the process monitor)

Process monitor is a simple command to wrap your application and monitor it. That's it! Whether you're running a cron command, a long-running process or the entire application you can prepend mon to the execution command to monitor the CPU, memory and network usage.

Installation

MON_VERSION=v0.1.0 sudo curl -sL https://github.com/toretto460/mon/releases/download/$MON_VERSION/default.mon-linux-amd64 -o /usr/local/bin/mon
sudo chmod +x /usr/local/bin/mon
mon sleep 10

Supported Backends

The only supported backend is statsd

StatsD

To send metrics to a statsd backend you can setup the following env variables

export MON_STATSD=true
export MON_STATSDHOST=localhost
export MON_STATSDPORT=8125
export MON_PROCESSNAME=command_name

mon dd if=/dev/zero of=/dev/null

Your statsd server will receive the following metrics

• command_name.net.byte_sent
• command_name.net.byte_recv
• command_name.cpu
• command_name.memory
• command_name.error

How to use it

~/ $ MON_PROCESSNAME=infinite-consumer MON_TICK=5 mon my-queue-consumer -m 200 -p 1   
     ────────────────────────────────────┬─────── ─┬─ ────────┬──────── ─────┬─────   
                                         │         │          │              │        
mon configuration (optional) ────────────┘         │          │              │        
mon ───────────────────────────────────────────────┘          │              │        
your command ─────────────────────────────────────────────────┘              │        
your command options ────────────────────────────────────────────────────────┘        

Configuration

We provide defaults for every configuration, but if you need to customize metrics here the list of env variables to provide:

• MON_STATSD: enable\disable statsd metrics, default disabled (example: MON_STATSD=true)
• MON_STATSDHOST: the hostname of statsd daemon (example: MON_STATSDHOST=localhost)
• MON_STATSDPORT: the post on which statsd is listening (example: MON_STATSDPORT=8125)
• MON_PROCESSNAME: the name of the process which will identify the monitored command (example: MON_PROCESSNAME=command_name)
• MON_TICK: the sampling interval in seconds (example: MON_TICK=5)

Development

Initialize the container env

bin/init.sh

Install dependencies

bin/provision.sh

Run a one-off command to the go container

bin/run.sh

Examples

bin/run.sh go run main.go sleep 2

bin/run.sh go run main.go dd if=/dev/zero of=/dev/null

bin/run.sh go run main.go exit 1

Build the binary

bin/build.sh