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I've been looking for something very similar to this for a while. Do you have a writeup for your setup? Also, how does Flatcar's immutability work? TFA mentione

I've been looking for something very similar to this for a while. Do you have a writeup for your setup? Also, how does Flatcar's immutability work? TFA mentioned that MicroOS is based on btrfs snapshots, but it didn't give any indication about how Flatcar worked (nor did the Flatcar GitHub readme). Do you know of any comparisons between Flatcar, CoreOS, and MicroOS? Also, any idea which of these work with Raspberry Pis?

jcastro 4y ago
Flatcar uses 2 partitions, A and B, you boot into one and then updates update the one that you're not booted into, when you reboot it it boots into the updated one. It's like Android: https://source.android.com/docs/core/ota/ab https://source.android.com/docs/core/ota/ab I maintain an awesome-list of immutable resources with a collection of talks and presentations from the people making the stuff. They do a better job explaining it than I can in an hn comment: https://github.com/castrojo/awesome-immutable https://github.com/castrojo/awesome-immutable However the list is currently focused on desktop stuff since this is a fairly common pattern in cloud already, I should probably write it up. Semi-related, a few of us have started a community around composable OCI fedora images, and one of our images is intended to be used as a home server built on CoreOS with ZFS, cockpit, and all the goodies you'd need. It's still fresh and we're looking for help if anyone's interested: https://github.com/ublue-os/ucore https://github.com/ublue-os/ucore (Disclaimer: I helped start this project)
- jpeeler 4y ago
  Whenever I was looking at using CoreOS, I was somewhat disheartened that automatic reboots weren't built in: https://github.com/coreos/rpm-ostree/issues/2831 https://github.com/coreos/rpm-ostree/issues/2831. Has this changed? I know zincati has maintenance window support, which would also be nice to have.

jcastro 4y ago

Flatcar uses 2 partitions, A and B, you boot into one and then updates update the one that you're not booted into, when you reboot it it boots into the updated one. It's like Android: https://source.android.com/docs/core/ota/ab https://source.android.com/docs/core/ota/ab I maintain an awesome-list of immutable resources with a collection of talks and presentations from the people making the stuff. They do a better job explaining it than I can in an hn comment: https://github.com/castrojo/awesome-immutable https://github.com/castrojo/awesome-immutable However the list is currently focused on desktop stuff since this is a fairly common pattern in cloud already, I should probably write it up. Semi-related, a few of us have started a community around composable OCI fedora images, and one of our images is intended to be used as a home server built on CoreOS with ZFS, cockpit, and all the goodies you'd need. It's still fresh and we're looking for help if anyone's interested: https://github.com/ublue-os/ucore https://github.com/ublue-os/ucore (Disclaimer: I helped start this project)

jpeeler 4y ago
Whenever I was looking at using CoreOS, I was somewhat disheartened that automatic reboots weren't built in: https://github.com/coreos/rpm-ostree/issues/2831 https://github.com/coreos/rpm-ostree/issues/2831. Has this changed? I know zincati has maintenance window support, which would also be nice to have.