unknown configuration key errors on first run

[Barna Gyomorei]

I'm trying to run a Packer build command from an Ubuntu VM on windows. And get these errors:

2019/04/26 14:01:26 Build 'amazon-ebs' prepare failure: 3 errors occurred:

* unknown configuration key: "decode_authorization_messages"

* unknown configuration key: "ena_support"

* unknown configuration key: "ssh_interface"

In the Packer log(attached full debug log) i see lines about missing plugins, but it's not clear for me where to get these plugins from.

Can you pls help to figure out what's wrong?

Thanks!

[Megan Marsh]

You can safely ignore those lines about the plugins :) . The problem is that your version of Packer isn't recognizing those keys. Can you share your packer template (especially the builder configuration) and what version of Packer you're using?

[Barna Gyomorei]

Thanks for the tip Megan! I had 1.0.4, don't remember exactly how, but probably installed with apt or yum. Now i downloaded from the website, so it's 1.4.0.

[Megan Marsh]

I think the main problem here is that the docs aren't versioned; those keys didn't exist when v1.0.4 was out. If you've upgraded to latest packer, it should work better. And if it doesn't, try running `packer fix` against your template to fix backwards-incompatible changes in key names.

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