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Debug NodeJS with Node Inspector on Cloud Foundry.md

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Debug NodeJS with Node Inspector on Cloud Foundry

Instructions:

###Your NodeJS application

  • Push NodeJS applicaiton to local Cloud Foundry (vcap)
  • Run pgrep -l node to find out the PID of your NodeJS applicaiton

If you get multiple PIDs, restart your application by vmc restart <application>. The application’s PID has be changed. Then run pgrep -l node again and find out the diffrent.

  • Open NodeJS application to debug mode

Run kill -s USR1 <NODE_PID>, replace <NODE_PID> with your application’s PID.

Run lsof -i:5858, you can get the result like

COMMAND   PID    USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
node    12319 mongris   17u  IPv4 561873      0t0  TCP localhost:5858

###Node Inspector

  • Push Node Inspector to local Cloud Foundry as another applicaiton, it is node-inspector by default
  • Open Node Inspector in browser with http://node-inspector.vcap.me/debug?port=5858

You must REFRESH Node Inspector in browser when NodeJS application restart