Tip: Command Line Tools

Hey fans! This is the first of a series of tips that will go over some skills that will help you in your personal and or professional work in devops.

Tools Needed

Windows - Cygwin, Gitbash, Powershell
Linux - Terminal
MacOs - Terminal

Scenario - You need to test how your application will handle a remote service becoming unavailable

• Run an ssh tunnel, you can use

  • Windows

      plink.exe -L 8080:localhost:8080 user@remote-host.example.com
    

  • Linux/Mac Os

      ssh -D 8080 -C -N user@remote-host.example.com  
    

• Run your application on localhost pointing to the remote service url as (localhost:8080/contextpath).
• Test to make sure all is well with the connection.
• Disconnect the ssh tunnel and watch how your application handles the failed connections.
• If your application barfs, it's time to look at circuit breakers (saving this for another topic).

Find out more:

IoTMade