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Add docs/images.md 

Signed-off-by: Salvatore Mazzarino <dev@mazzarino.cz>
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Salvatore Mazzarino 2019-06-13 18:56:36 +02:00
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@ -143,3 +143,25 @@ Be aware of the following limitations:
* [Amazon Linux 2 LTS](https://aws.amazon.com/amazon-linux-2/release-notes/) is the recommended minimum version, a previous version called just "Amazon Linux AMI" is not supported.
> Note: SSH username for Amazon Linux 2 based instances will be `ec2-user`
## Flatcar
Flatcar is a friendly fork of CoreOS and as such, compatible with it. If some issues occurs with it, it is likely that also CoreOS miight be affected. If you encounter any problem please report it to us.
The following steps are known:
* The latest stable Flatcar AMI can be found using:
```bash
aws ec2 describe-images --region=us-east-1 --owner=075585003325 \
--filters "Name=virtualization-type,Values=hvm" "Name=name,Values=Flatcar-stable*" \
--query 'sort_by(Images,&CreationDate)[-1].{id:ImageLocation}'
```
Also, you can obtain the "AMI ID" from Flatcar web page too. They publish their AMI's using a json file at [https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_ami_all.json](https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_ami_all.json). Using some scripting and a "json" parser (like jq) you can obtain the AMI ID from a specific region:
```bash
curl -s https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_ami_all.json | jq -r '.amis[] | select(.name == "us-east-1") | .hvm'
"ami-096be41989ec7e569"
```
> Note: SSH username for Flatcar based instances will be `core`