commit f2f1d531cc5b6ad7f935316e0a5b286f9ff76181 Author: Yutsuo Date: Mon Nov 19 00:21:43 2018 +0000 first commit diff --git a/.gitignore b/.gitignore new file mode 100755 index 0000000..e7782ff --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +npm-debug.log +dump/* +node_modules/* +.npmrc diff --git a/Dockerfile b/Dockerfile new file mode 100755 index 0000000..30643eb --- /dev/null +++ b/Dockerfile @@ -0,0 +1,19 @@ +FROM node + +WORKDIR /app + +# Copying npm config file setting npm repository location. +COPY .npmrc .npmrc + +# If you add the package.json first and run npm install later, +# Docker won’t have to install the dependencies again if you +# change the package.json file. +# This results from the way the Docker image is being built (layers and cache), +# and this is what we should do: +COPY package.json /app +RUN npm install +COPY . /app + +CMD node app.js + +EXPOSE 3001 diff --git a/README.md b/README.md new file mode 100755 index 0000000..f43b32e --- /dev/null +++ b/README.md @@ -0,0 +1 @@ +Nothing to see here yet, folks. diff --git a/app.js b/app.js new file mode 100755 index 0000000..b57350f --- /dev/null +++ b/app.js @@ -0,0 +1,130 @@ +var express = require('express'); +var app = express(); +var mongoose = require('mongoose'); +var Schema = mongoose.Schema; +var database = 'mongodb://mongo:27017/test'; +var today = new Date(); +var counter = 0; +var Prometheus = require("prom-client"); + +const libCounter = new Prometheus.Counter({ + name: 'lib_invocation_count', + help: 'A simple counter for app access during runtime created with unofficial prometheus nodejs library' +}); + +const libUptime = new Prometheus.Histogram({ + name: 'lib_upTime', + help: 'uptime A counter of the application\'s uptime in millisenconds.' +}) + +libUptime.startTimer(); + +const collectDefaultMetrics = Prometheus.collectDefaultMetrics; + +// Probe every 5th second. +collectDefaultMetrics({ timeout: 5000 }); + +// new schema model object based on the structure of what I want to put on MongoDB collection +var testSchema = new Schema({ + color: { + type: String + } +},{ + collection: 'test' +}); + +// new object that will hold the data using model structure made above +var colors = mongoose.model('colorName', testSchema); + +// Prometheus metrics +// Handmade +app.get('/metrics', function(req, res){ + // var now = new Date(); + // var passedTime = now - today; + // res.writeHead(200, {'Content-Type':'text/plain'}); + // res.write('# HELP uptime A counter of the application\'s uptime in millisenconds.' + '\n'); + // res.write('# TYPE uptime counter' + '\n'); + // res.write('uptime ' + passedTime + '\n'); + // res.write('# HELP invocation_count A simple counter for app access during runtime' + '\n'); + // res.write('# TYPE invocation_count counter'+ '\n'); + // res.write('invocation_count ' + counter + '\n'); + res.set('Content-Type', Prometheus.register.contentType) + res.end(Prometheus.register.metrics()) + res.end(); +}); + + + +app.get('/', (req, res)=>{ + res.json([{message:'yes, your nodejs app is really running'}]); + counter++; + libCounter.inc(); +}); + +app.get('/info', function(req, res){ + colors.find({}).then(function (colors) { + res.json(colors); + }); +}); + +app.get('/info/:name', function(req, res){ + colors.find({color: req.params.name}).then(function(colors){ + res.json(colors); + }); +}); + +app.get('/colors', function(req, res){ + colors.find({}).then(function (colors) { + res.json(colors); + }); +}); + +app.get('/colors/query/:name', function(req, res){ + res.send('color is ' + req.params.name); +}); + +app.post('/colors/add/:name', function(req, res){ + var item = {color: req.params.name}; + var data = new colors(item); + data.save(); + res.send('color ' + req.params.name + ' added to database'); +}); + +// database connection (with retries) +const options = { + autoIndex: false, // Don't build indexes + reconnectTries:30, // Retry up to 30 times + reconnectInterval: 500, // Reconnect every 500ms + poolSize: 10, // Maintain up to 10 socket connections + // If not connected, return errors immediately rather than waiting for reconnect + bufferMaxEntries: 0, + useNewUrlParser: true +} + +const connectWithRetry = () => { + console.log('MongoDB connection with retry') + mongoose.connect(database, options).then(()=>{ + console.log('MongoDB is connected') + }).catch(err=>{ + console.log('MongoDB connection unsuccessful, retry after 5 seconds.') + setTimeout(connectWithRetry, 5000) + }) +} + +connectWithRetry(); + +app.listen(3001, () => { + console.log('Server running on port 3001'); +}); + +// var today = new Date(); +// +// +// setInterval(()=>{ +// // console.log('process.uptime(): ' + process.uptime()); +// var now = new Date(); +// var passed = now - today; +// console.log('# HELP uptime A summary of the application\'s uptime.') +// console.log('# TYPE uptime summary') +// console.log('uptime ' + passed); +// }, 1000) diff --git a/db.js b/db.js new file mode 100755 index 0000000..6d6be77 --- /dev/null +++ b/db.js @@ -0,0 +1,5 @@ +// db.js + +module.exports = { + DB: 'mongodb://localhost:27017/test' +} diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100755 index 0000000..d45dd69 --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,37 @@ +version: "3" +services: + app: + container_name: app + depends_on: + - mongo + restart: always + build: . + image: custom/node + ports: + - "3001:3001" + links: + - mongo + mongo: + container_name: mongo + image: mongo + ports: + - "27017:27017" + prometheus: + container_name: prometheus + image: prom/prometheus:latest + volumes: + - ./prometheus.yml:/etc/prometheus/prometheus.yml + ports: + - 9090:9090 + grafana: + container_name: grafana + image: grafana/grafana + ports: + - 3000:3000 +# configuration below to set subnet in order to function within BB network. +networks: + default: + ipam: + driver: default + config: + - subnet: 192.168.5.0/24 diff --git a/package-lock.json b/package-lock.json new file mode 100755 index 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+} diff --git a/package.json b/package.json new file mode 100755 index 0000000..91b91ae --- /dev/null +++ b/package.json @@ -0,0 +1,21 @@ +{ + "name": "app", + "version": "1.0.0", + "description": "it's my first nodejs app ever yay", + "main": "app.js", + "scripts": { + "test": "echo \"error: no test specified\" && exit 1" + }, + "keywords": [ + "test", + "app", + "yay" + ], + "author": "F2256342", + "license": "ISC", + "dependencies": { + "express": "^4.16.3", + "mongoose": "^5.3.2", + "prom-client": "^11.2.0" + } +} diff --git a/prometheus.yml b/prometheus.yml new file mode 100755 index 0000000..170cc81 --- /dev/null +++ b/prometheus.yml @@ -0,0 +1,9 @@ +global: + scrape_interval: 1s # Set the scrape interval to every 15 seconds. Default is every 1 minute. + evaluation_interval: 5s # Evaluate rules every 15 seconds. The default is every 1 minute. +scrape_configs: + - job_name: 'app1' # Job name + static_configs: + - targets: ['app:3001'] # mysqld_exporter address and port + labels: + alias: 'app1' # alias name given to this instance