# Installation failed koa

**URL:** <https://discuss.openedx.org/t/installation-failed-koa/4837>\
**Category:** Site Operations Help\
**Tags:** koa\
**Created:** [April 26, 2021, 9:53am UTC](https://discuss.openedx.org/t/installation-failed-koa/4837 "2021-04-26T09:53:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mattia.pompita](https://avatars.discourse-cdn.com/v4/letter/m/f04885/32.png) [@mattia.pompita](https://discuss.openedx.org/u/mattia.pompita)\
**Post date:** [April 26, 2021, 9:53am UTC](https://discuss.openedx.org/t/installation-failed-koa/4837/1 "2021-04-26T09:53:24Z")

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Hi,

I’m trying to do an open edx koa.3 installation using an aws instance.

I encounter an error at installation time: ansible failed, installation failed, Your log file is at /home/ubuntu/logs/install-20210426-094226.log, Your environment: OPENEDX\_RELEASE = open-release / koa. 3.

Another question, which IP address to use in EDXAPP\_CMS\_BASE, should I use the Ubuntu 20.04 server address, the public ip of the aws instance where the Ubuntu server is installed or the private ip?

Thanks for your help

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**Author:** ![BbrSofiane](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/bbrsofiane/32/561_2.png) [@BbrSofiane](https://discuss.openedx.org/u/BbrSofiane)\
**Post date:** [April 26, 2021, 11:02am UTC](https://discuss.openedx.org/t/installation-failed-koa/4837/2 "2021-04-26T11:02:13Z")

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Hi Mattia,

Just to make sure, did you follow these [instructions](https://openedx.atlassian.net/wiki/spaces/OpenOPS/pages/1969455764/Koa+Lilac+Native+Open+edX+platform+Ubuntu+20.04+64+bit+Installation)?

In production, you would set EDXAPP\_CMS\_BASE with studio.. If you’re just deploying a test server you can set it to :18010.

If you’re just getting started with Open edX, you have a look at [Tutor](https://docs.tutor.overhang.io/index.html).