[akulbe]

That wouldn’t surprise me at all. I recently had issues with an EC2 instance in AWS that I couldn’t auth to, with an Ed25519-based key.

Turns out they didn’t even support it until ~2021.

These instances were created before then. It took quite a while to figure out what was going on.

[pritambaral]

Does Azure not support cloud-init? When AWS complained about Ed25519 keys, I just told AWS to not associate any keys at all and just put my key in the cloud-init config. The OS copies the contents from cloud-init to the appropriate authorized_keys file on first boot and it's none of AWS's business which key (or how many keys) I use to login into my instances.