openshift-diy-nodejs-mongodb

Thanks for the great work by razorinc and creationix, this repo let you test Node.js v0.8 and above with MongoDB in an OpenShift DIY application. It will first check for pre-compiled Node.js linux version, then compile from source if not found.

node-supervisor is used to automatically restart the node.js app if somehow crashed.

• Note that Node.js v0.6.x won't work with this method.
• This repo is for technology preview/testing purpose only, not good for production
• MongoDB server is setup for standalone environment only
• NO authentication is setup when connect to MongoDB server
• MongoDB Journal is disabled to save disk space
• MongoDB binary alone use up around 240MB, better limit your test database size under 500MB

Usage - New (rhc-1.4.7 or above)

Create the DIY app

rhc app create yourapp diy-0.1 --from-code=git://github.com/eddie168/openshift-diy-nodejs-mongodb.git

Note that using --from-code will not retain this repository as remote in your app's repo, so you will have to manually merge any future updates if you interested.

Usage - Old

Create an DIY app

rhc app create -t diy-0.1 -a yourapp

Add this repository

cd yourapp
git remote add nodejsMongo -m master git://github.com/eddie168/openshift-diy-nodejs-mongodb.git
git pull -s recursive -X theirs nodejsMongo master

Change settings in config_diy.json if needed (remember to commit the changes), then push the repo to openshift

git push

If pre-compiled Node.js binary is not available, first push will take a while to finish.

You can specify the Node.js script to start with in package.json as described here.

Check the end of the git push message for Node.js and MongoDB version:

remote: Starting DIY cart
remote: Node Version:
remote: { http_parser: '1.0',
remote:   node: '0.10.10',
remote:   v8: '3.14.5.9',
remote:   ares: '1.9.0-DEV',
remote:   uv: '0.10.10',
remote:   zlib: '1.2.3',
remote:   modules: '11',
remote:   openssl: '1.0.1e' }
remote: MongoDB Version:
remote: db version v2.4.4
remote: Thu Jun 13 04:15:26.653 git version: xxxxxxxxxxxxxxxx
remote: note: noprealloc may hurt performance in many applications
remote: about to fork child process, waiting until server is ready for connections.
remote: forked process: xxxx
remote: all output going to: /var/lib/openshift/xxxxxxxxxx/diy/logs/mongodb.log
remote: child process started successfully, parent exiting
remote: nohup supervisor -w . -i node_modules server.js >/var/lib/openshift/xxxxxxxx/diy//logs/server.log 2>/var/lib/openshift/xxxxxxxx/diy//logs/error.log &

In this case it is Node.js v0.10.10 and MongoDB v2.4.4.

You can find the Node.js app's log at $OPENSHIFT_LOG_DIR/server.log. Subsequent push or restart will rename the log file with a time stamp before overwritten. The same goes to MongoDB log file and can be found at $OPENSHIFT_LOG_DIR/mongodb.log. You should be able to see these log files with rhc tail -a yourapp.

Check the log file for the MongoDB test output in the example server.js.

Settings

Edit config_diy.json

"nodejs": {
  "version": "v0.10.26",
  "removeOld": true,
  "separateErrorLog": true,
  "cleanNPMInstall": false
},
"mongodb": {
  "version": "2.6.0",
  "port": 27017,
  "removeOld": true
}

• nodejs.version: change node.js version

• nodejs.removeOld: delete previous installed node.js binarys

• nodejs.separateErrorLog: If true, error will be redirected to ${OPENSHIFT_DIY_LOG_DIR}/error.log, otherwise will be redirected into ${OPENSHIFT_DIY_LOG_DIR}/server.log

• cleanNPMInstall: If true, the node_modules/ directory will be deleted before execute npm install. Set it to false to reduce the time required to re-deploy (especially when there are native code modules such as bcrypt).

• mongodb.version: change MongoDB version

• mongodb.port: port used by MongoDB (Refer to port number limit here)

• mongodb.removeOld: delete previous installed MongoDB binary

After change settings, commit and then push to reflect the changes to your OpenShift gear.

Use MongoDB in Node.js

Environment variables MONGODB_URL (which is based on $OPENSHIFT_DIY_IP when the app is started) is defined. Example of connecting to MongoDB server using the Node.js native driver:

var MongoClient = require('mongodb').MongoClient;
MongoClient.connect(process.env.MONGODB_URL + "testDB", function(err, db) {
  if (err) { return console.dir(err); }
});