Selecting Node.js Version during Environment Creation
2. Switch to the Node.js programming language tab and choose the required server version using the drop-down list in the central part of the frame:
3. Next, you can select the preferred process manager (supervisor, forever, npm or pm2) through the tags drop-down list (circled in the image below):
A Node.js process manager helps to control your application lifecycle, providing a simple way to start, stop and restart processes on a node. Additionally, it can be configured to automatically re-run scripts in case of an application startup failure or code update:
- supervisor - monitors any code changes in the launched .js scripts, keeping them up-to-date
- npm - allows to manage additional application modules and packages by means of the package.json config file
- forever - manages node processes (i.e. service start, stop, restart) to save services alive through keeping them run continuously
- pm2 - provides you with multiple special options (like monitoring, load balancing, deployment, etc), allowing to manage your application more effectively
Specify the remaining server and environment parameters (e.g. cloudlet limits, region, environment name, etc) and click the Create button in the bottom right frame corner.
Changing Node.js Version for Existing Environment
You are also able to switch the version of your NodeJS server and/or process manager afterward, for the already existing environment.
1. Access the redeploy container(s) dialog through either:
- clicking on the Change environment topology button next to the appropriate environment.
In the opened frame, select to edit your Nodejs server version or tag (i.e. click on the pencil icon within one of the appropriate fields).
- selecting the Redeploy container(s) button next to the required node (or the appropriate environment layer, for updating all of the comprised containers at once).
2. Within the opened Redeploy container(s) dialog, re-configure the following options:
- Tag - provides a choice of needed Node.js version and preferred process manager
- Keep volumes data - allows saving data in volumes
- Simultaneous or Sequential deployment with delay (for scaled servers only) - defines whether all containers within a layer should be redeployed at once or one-by-one, to avoid downtime
3. To finish Node.js version changing, click on Redeploy and confirm your action within the opened pop-up dialog.