Have upgrade only do /etc merge just before reboot about rpm-ostree HOT 8 CLOSED

this is a comment we had in another conversation, I add here to not get it lost: what do you think if we remount /etc as read-only after the upgrade is done? Postponing the merge before the reboot seems a bit risky, as the users won't have the chance to deal with possible errors and do we want to block the reboot in that case?

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Yeah, would likely work...we'd just need to make sure the operating system content was fine with read-only /etc. Things like /etc/resolv.conf would need to live outside it, etc. This is obviously ground that others have covered before, but making it the default in e.g. Fedora would be a major change. I'd support it though.

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This was also hitting the Cockpit tests.

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Any steps in this issue? (I lost some changes because i forget about reboot when doing upgrade =()

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CC #702

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I think we should fix (most of) this in libostree - main discussion should be in ostreedev/ostree#545

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PR in ostreedev/ostree#1503

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Closing this one in favor of ostreedev/ostree#545

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