Simple Health System for linux servers, using NodeJs, ES2015, React, RethinkDB, and a lot of awesomeness
The monitor is made of sub-systems: a Station (aka client or node) in wich the data is read, and a Monitor (or server) to store the information, act as webserver
The station, in a few words, is a express application, it have a RESP API that gives data with the state of the linux machine
DCMTK - DICOM Toolkit. This library implements the DICOM protocol, it has the echoscu command line tool, it's used in order to get a DICOM ECHO to a DICOM node.
In Debian/Ubuntu, can be installed as:
# apt-get install dcmtk
In OSX, DCMTK can be installed with Homebrew:
# ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
# brew install dcmtk
In order to run the server node version 4.0+ is recommended, an east installation can be made with NVM.
to install nvm, write in the console:
# wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.28.0/install.sh --no-check-certificate | bash
$ nvm ls-remote
$ nvm install v4
$ nvm alias default stable
The project has been developed in ES6, so, in order to make it work, we use babel as javascript compiler/transpiler, or a version of node who support ES6. (node v4.0+) To run and keep working the app even on errors, is used PM2, it's a "production process manager for NodeJs. Perfectly fitted for microservices architecture", as ring to the finger. I'ts higly recommender to install both as global:
# npm install -g babel babel-cli pm2
To install, just clone the repo and install the dependencies with npm
# git clone https://github.com/DigitalDev-Toth/health-station.git
# cd health-station
# npm install
You also can configure some settings editing the file:
/config/app.js
To test if the APi get the data correctly, run the test::
$ npm run start-test
It must return something like this:
7 passing (7s)
If a problem occurs, feel free to open a issue or make a pull request to improve the code
In order to run te station:
$ npm run start-prod
the script runs the following command:
$ NODE_ENV=production pm2 start health-station.js -f --interpreter babel-node --name station && pm2 logs station",
NODE_ENV=production use the development configuration files, (see /config/index.js for more info)
pm2 start health-station.js call the entry point script, -f is to force to restart the app if is already running, --interpreter babel-node use babel to run the code (for the ES6 compatibility), --name station is a name for the pm2 instance, finally pm2 logs station is to see the console output of the station.
To stop the station:
$ npm run stop-prod
or more directly on the console:
$ pm2 stop station
Array with the information of every route lised bellow
{
"cpu": [
{
"CPU": "all",
...
},
{
"CPU": "0",
...
},
{
"CPU": "1",
...
}
],
"ram": {
"kbfree": 3417117,
...
},
"discMounted": [
{
"MBfsfree": 456625,
...
}
],
"discIO": {
"totalRequestPerSecond": 2.33,
...
},
"netIO": [
{
"interface": "eth2",
...
}
],
"pingNational": {
"address": "www.emol.com",
"port": 80,
"attempts": 8,
"avg": 112.21248600000001,
...
},
"pingInternational": {
"address": "www.nytimes.com",
"port": 80,
"attempts": 8,
"avg": 158.32892750000002,
...
}
}return an array, with the stats of every core of the last 3 seconds (configurable).
[
{
"CPU": "all",
"userPercent": 10.58,
"nicePercent": 0,
"systemPercent": 3.92,
"iowaitPercent": 0.85,
"stealPercent": 0,
"idlePercent": 84.64
},
{
"CPU": "0",
"userPercent": 9.28,
"nicePercent": 0,
"systemPercent": 5.15,
"iowaitPercent": 0.69,
"stealPercent": 0,
"idlePercent": 84.88
},
{
"CPU": "1",
...
}
]Memory utilization of the last 3 seconds (configurable).
{
"kbfree": 3451009,
"kbused": 4722915,
"kbbuffers": 111088,
"kbcached": 1165388,
"free": "3.45 GB",
"used": "4.72 GB",
"percentUsed": 57.78
}An array with the logic filesystems and his stats
[
{
"MBfsfree": 456626,
"MBfsused": 8686,
"fsused": 1.87,
"FILESYSTEM": "/dev/disk/by-uuid/e87ea436-9b9c-4a0c-bd0f-ab8a640137d0"
}
]Disc I/O operations stats of the last 3 seconds (configurable).
{
"totalRequestPerSecond": 12.33,
"readRequestPerSecond": 1,
"writeRequestPerSecond": 11.33,
"blockReadsPerSecond": 8,
"blockWritesPerSecond": 197.33
}An array with the Network utilization of every interface in the last 3 seconds (configurable).
[
{
"interface": "eth2",
"rxkBps": 0.27,
"txkBps": 0,
"interfaceUtilization": 0
}
]An array, the first element is a ping to a national server, and the second element is to an international server. Both address and number of attempts are configurable.
[
{
"address": "www.emol.com",
"port": 80,
"attempts": 8,
"avg": 12.163561625,
"max": 31.209731,
"min": 8.883681,
"results": [
{
"seq": 0,
"time": 31.209731
},
{
"seq": 1,
"time": 9.262506
},
{
"seq": 2,
"time": 10.25427
},
{
"seq": 3,
"time": 9.833748
},
{
"seq": 4,
"time": 9.002274
},
{
"seq": 5,
"time": 8.883681
},
{
"seq": 6,
"time": 9.047601
},
{
"seq": 7,
"time": 9.814682
}
]
},
{
"address": "www.nytimes.com",
"port": 80,
"attempts": 8,
"avg": 308.77631375,
"max": 1179.338357,
"min": 181.113504,
"results": [
{
"seq": 0,
"time": 199.566791
},
{
"seq": 1,
"time": 181.113504
},
{
"seq": 2,
"time": 183.304602
},
{
"seq": 3,
"time": 181.48339
},
{
"seq": 4,
"time": 181.398042
},
{
"seq": 5,
"time": 1179.338357
},
{
"seq": 6,
"time": 181.693964
},
{
"seq": 7,
"time": 182.31186
}
]Make a ping to a custom host. Example GET /v1/ping/9gag.com
{
"address": "9gag.com",
"port": 80,
"attempts": 8,
"avg": 266.933967875,
"max": 274.60793,
"min": 260.277802,
"results": [
{
"seq": 0,
"time": 274.60793
},
{
"seq": 1,
"time": 272.718204
},
{
"seq": 2,
"time": 264.213283
},
{
"seq": 3,
"time": 265.674945
},
{
"seq": 4,
"time": 265.151126
},
{
"seq": 5,
"time": 266.754569
},
{
"seq": 6,
"time": 260.277802
},
{
"seq": 7,
"time": 266.073884
}
]
}(... PENDING ...)