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systemctl: automatically softreboot/kexec if set up on reboot

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Automatically softreboot if the nextroot has been set up with an OS
tree, or automatically kexec if a kernel has been loaded with kexec
--load.

Add SYSTEMCTL_SKIP_AUTO_KEXEC and SYSTEMCTL_SKIP_AUTO_SOFT_REBOOT to
skip the automated switchover.
This commit is contained in:
Luca Boccassi
2023-10-20 11:45:37 +01:00
parent 017e8094f6
commit 665a3d6d15
9 changed files with 54 additions and 19 deletions
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docs/ENVIRONMENT.md
+7
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@@ -136,6 +136,13 @@ All tools:
* `$SYSTEMCTL_SKIP_SYSV=1` — if set, do not call SysV compatibility hooks.
* `$SYSTEMCTL_SKIP_AUTO_KEXEC=1` — if set, do not automatically kexec instead of
reboot when a new kernel has been loaded.
* `$SYSTEMCTL_SKIP_AUTO_SOFT_REBOOT=1` — if set, do not automatically soft-reboot
instead of reboot when a new root file system has been loaded in
`/run/nextroot`.
`systemd-nspawn`:
* `$SYSTEMD_NSPAWN_UNIFIED_HIERARCHY=1` — if set, force `systemd-nspawn` into