topic Re: Unable to build docker file in Cisco Dev Box in DevNet Sandbox

Unable to build docker file in Cisco Dev Box

divyansmahansaria — Wed, 04 May 2022 13:59:42 GMT

I have connected to Cisco dev box (10.10.20.50 server) using WinSCP. Inside the dev box, I have created a folder 'App' and placed the same files in the folder as demonstrated in the lab - https://developer.cisco.com/learning/lab/iot-iox-app-docker/step/1. The folder and files within it have full permission as per screenshot attached (App Folder.JPG).

However, when I try to build a docker image for the dockerfile and code present in the 'App' folder I get the attached error (Docker Build Error.JPG).

Can you please let me know whether docker build is supported in the dev box ? Thank you.

Re: Unable to build docker file in Cisco Dev Box

bigevilbeard — Wed, 04 May 2022 16:42:32 GMT

@divyansmahansaria this might need to be run as root? However reading the learning lab, i think you need to build the file on your local machine.

Re: Unable to build docker file in Cisco Dev Box

kcapoor — Tue, 10 May 2022 08:29:43 GMT

Hi @bigevilbeard ,

i tried the same lab on my mac and got same error. seem like the devbox provided doesn't have correct DNS or IP to name mapping is not working. did some direct pings and result below:

[developer@devbox karan]$ ping www.google.com

ping: www.google.com: Temporary failure in name resolution

[developer@devbox karan]$ ping https://registry-1.docker.io/v2/

ping: https://registry-1.docker.io/v2/: Temporary failure in name resolution

i cannot add DNS myself due to account restriction. can someone in lab operation team look into this and provide a resolution.

Re: Unable to build docker file in Cisco Dev Box

bigevilbeard — Tue, 10 May 2022 09:47:57 GMT

@kcapoor can you ping with IP, is this just DNS not resolving?

Re: Unable to build docker file in Cisco Dev Box

kcapoor — Tue, 10 May 2022 10:08:20 GMT

direct ping also not allowed

developer@devbox ~]$ ping 142.250.196.4

PING 142.250.196.4 (142.250.196.4) 56(84) bytes of data.

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitte

Re: Unable to build docker file in Cisco Dev Box

bigevilbeard — Tue, 10 May 2022 10:37:55 GMT

Hello @kcapoor i would suggest opening a support ticket with the engineering team to look at this - you can do this HERE Typically though the sandboxes do not have internet access for security posture, but if the learning lab you are following suggests this is not the case something is amiss

Re: Unable to build docker file in Cisco Dev Box

Geevarghese Cheria — Tue, 17 May 2022 14:54:33 GMT

Can you try the new lab -https://developer.cisco.com/learningcenter/labs/iot-iox-app-docker/building-an-iox-application-with-docker/