Custom Node.js cartridge for OpenShift
This is a custom Node.js cartridge that takes care of auto-updating the Node.js and NPM versions on each build.
Because the standard OpenShift cartridge never gets updated to the latest Node.js version.
When to use
When you need a quick and unsophisticated solution to run your application on the latest Node.js version.
Note: Looking for (co-)maintainers
A lot of people have been using this cartridge since the beginning of 2015. Thank you all for your PRs and moral support.
However, since I'm not using OpenShift in my projects anymore, there's now little reason for me to maintain this repository as well as it probably deserves.
So, if anyone is willing and ready to step up and become a maintainer, please don't hesitate to drop me a line!
The lazy way
Just click here:
…or deploy from the OpenShift Hub Quickstart.
Go to Choose a type of application in your OpenShift Online account, paste the URL below into "Code Anything" textbox at the bottom of the page, click "Next", then set your public URL and click "Create Application".
Using command line
Assuming you have
rhc installed (see here), run:
rhc app create appname https://raw.githubusercontent.com/icflorescu/openshift-cartridge-nodejs/master/metadata/manifest.yml
appname is the name of your application.
If you want to create the app with your own source code instead of the provided application template, run:
rhc app create appname \ https://raw.githubusercontent.com/icflorescu/openshift-cartridge-nodejs/master/metadata/manifest.yml \ --from-code=https://github.com/you/your-repo.git
https://github.com/you/your-repo.git is your application repository URL.
Make sure your app has the appropriate
start entry in
package.json (see note below).
You can also create an app based on multiple cartridges. For instance, assuming you'd want to include this custom MongoDB cartridge as well, run:
rhc app create appname \ https://raw.githubusercontent.com/icflorescu/openshift-cartridge-nodejs/master/metadata/manifest.yml \ https://raw.githubusercontent.com/icflorescu/openshift-cartridge-mongodb/master/metadata/manifest.yml
See output of
rhc app create --help for information on additional options.
Customizing the Node.js and npm versions
By default, the Node.js version is determined by querying semver.io/node/unstable.
A different URL can be specified either via
NODE_VERSION_URL environment variable or by setting
.openshift/NODE_VERSION_URL marker in your application repository. For instance, you'd get the latest 0.10.x (0.10.41 as of Jan 24, 2015) by putting this in
NODE_VERSION_URL variable or
If you're using a non-default Node.js version and you're planning to scale the application across multiple gears, you must use the environment variable (learn here why).
By default, the npm version is determined by running
npm view npm version.
A different npm version can be specified either via
NPM_VERSION_URL environment variable or by setting
.openshift/NPM_VERSION_URL marker in your application repository. For instance, you'd get the latest 2.x (2.14.16 as of Jan 24, 2016) by putting this in
NPM_VERSION_URL variable or
- The cartridge build script is using this function to check for the latest Node.js and npm versions and installs them if necessary;
- This cartridge can be scaled;
- This cartridge does not (yet?) have a hot-deploy strategy.
- Can't guarantee this cartridge is production-ready. Some people use it though (on their own responsibility).
- This is a lean cartridge. No unnecessary modules are installed. Which means that unlike the standard Node.js cartridge – it won't install supervisor for you. You'll have to implement your own logic to auto-restart on errors. The provided application template is using cluster for that.
- The cartridge emulates the execution of
npm startto start your application, so make sure your application entrypoint is defined in your start script of your
package.jsonin the provided template or read the
npmdocs for more information. See a discussion here to learn why the cartridge is emulating
npm startinstead of actually running it.
- The cartridge also emulates the execution of
npm stopif the script is found in your
package.jsonfile. Otherwise, a
SIGTERMis sent to the running process using
- Due to OpenShift's outdated gcc (4.4.7 as of Jan 4 2016), native modules (such as pg-native) won't compile on recent Node.js versions. They'll only work on Node.js 0.10 and 0.12. See this issue for more info.
- Upon cartridge initialization, the Node.js binary package is downloaded and installed, which may take a while, depending on OpenShift server and network load. 2 - 3 minutes is quite often, but 5 - 10 minutes is not uncommon, especially for scalable multi-gear setups (if you specified "Scale with web traffic").
- The cartridge automatically installs the npm
dependenciesas needed on each build/deploy event;
devDependenciesare not installed (see an in-depth discussion here).
Q: I'm getting the error Cannot download, must be smaller than 20480 bytes while trying to deploy the cartridge to OpenShift. What am I doing wrong?
A: You're probably trying to use the URL
https://github.com/icflorescu/openshift-cartridge-nodejs instead of
https://raw.githubusercontent.com/icflorescu/openshift-cartridge-nodejs/master/metadata/manifest.yml. A common mistake for people not paying sufficient attention while trying to use a custom cartridge for the first time.
Q: The latest Node.js version is 5.3.0, but the cartridge installs 5.1.1. Isn't it supposed to install the latest?
A: By default, the Node.js version is determined by querying semver.io/node/unstable (see the top of this README). For reasons which escape me, semver.io is not updating instantly the latest version, but you can force the cartridge to install it by putting, for instance,
NODE_VERSION_URL environment variable or
Q: How do I disable the auto-update feature? I want to lock my application to specific Node.js and npm versions.
A: Just set the necessary environment variables or markers to the versions you need. For instance, you can lock your application to Node.js 4.3.2 and npm 3.6.0 by setting:
git push fails with:
remote: CLIENT_MESSAGE: Stopping Node.js application... remote: CLIENT_RESULT: Warning! Could not stop Node.js application! remote: An error occurred executing 'gear prereceive' (exit code: 1) remote: Error message: CLIENT_ERROR: Failed to execute: 'control stop' for /var/lib/openshift/[...]/nodejs remote: remote: For more details about the problem, try running the command again with the '--trace' option. To ssh://[...].git/ ! [remote rejected] master -> master (pre-receive hook declined) error: failed to push some refs to 'ssh://[...].git/'
A: Your application may take longer than 60 seconds to shutdown. Try to
git push again until it works.
Q: I'm trying to use
package.json to specify
npm versions, but it doesn't work. What do I have to do?
Since you're here, chances are you might also be interested in this custom MongoDB cartridge.
Before raising issues
I'm getting lots of questions from people just learning to do web development or simply looking to solve a very specific problem they're dealing with. While I will answer some of them for the benefit of the community, please understand that open-source is a shared effort and it's definitely not about piggybacking on other people's work. On places like GitHub, that means raising issues is encouraged, but coming up with useful PRs is a lot better. If I'm willing to share some of my code for free, I'm doing it for a number of reasons: my own intellectual challenges, pride, arrogance, stubbornness to believe I'm bringing a contribution to common progress and freedom, etc. Your particular well-being is probably not one of those reasons. I'm not in the business of providing free consultancy, so if you need my help to solve your specific problem, there's a fee for that.
See contributors here.
If you find this repo useful, don't hesitate to give it a star and spread the word.
The ISC License.