Software Development

OpenShift Quick Tip: Port Forwarding with v3 and the All-In-One-VM

originJust a short tip today, but I was playing around with the all-in-one vm from the OpenShift team and wanted to use the port-forwarding feature for a quick check of a running database. You can use the CLI to forward one or more local ports to a pod. This allows you to listen on a given or random port locally, and have data forwarded to and from given ports in the pod.

But whenever I tried to execute:

oc port-forward mysql-2-zjx6u 3306:3306

It looked like it worked until the very first time I tried to use the tunnel:

I1020 11:38:54.754799 8356 portforward.go:227] Forwarding from 127.0.0.1:3306 -> 3306
I1020 11:38:54.757299 8356 portforward.go:227] Forwarding from [::1]:3306 -> 3306
I1020 11:39:10.824839 8356 portforward.go:253] Handling connection for 3306
E1020 11:39:10.833340 8356 portforward.go:312] An error occurred forwarding 3306 -> 3306: Error forwarding port 3306 to pod mysql-2-zjx6u_myfear, uid : Unable to do port forwarding: socat not found.

Turns out, that the needed socat package isn’t installed on the all-in-one-vm. In order to fix that, you have to ssh into the instance:

vagrant ssh

And install socat:

sudo /bin/yum install socat

After that you’re able to use the tunnel and forward ports to your OpenShift pod.

Further Information:

Markus Eisele

Markus is a Developer Advocate at Red Hat and focuses on JBoss Middleware. He is working with Java EE servers from different vendors since more than 14 years and talks about his favorite topics around Java EE on conferences all over the world. He has been a principle consultant and worked with different customers on all kinds of Java EE related applications and solutions. Beside that he has always been a prolific blogger, writer and tech editor for different Java EE related books. He is an active member of the German DOAG e.V. and it's representative on the iJUG e.V. As a Java Champion and former ACE Director he is well known in the community. Follow him on Twitter @myfear.
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