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dracut-crypt-ssh
dracut initramfs module to start dropbear sshd during boot to unlock the root filesystem with the (cryptsetup) LUKS passphrase remotely
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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dracut-sshd
Provide SSH access to initramfs early user space on Fedora and other systems that use Dracut
https://github.com/dracut-crypt-ssh/dracut-crypt-ssh/commit/6ae8c358d24989ac7c6e625609bd1af4cf8ce1de has been merged - it at least helps resolve the ed25519 issue you were having.
In my research for solutions I also came across this project: https://github.com/stewartadam/zfs-keyvault
If you're curious I've uploaded the deployment script to my Github here: https://github.com/edifus/ubuntu-server-zfsbootmenu