m/n/c/update: implement kexec-based activation
As we've had some issues with EFI-based slot activation and enterprise
server firmware is extremely slow, this implements kexec-based
activation. This just kexecs into the freshly-installed slot instead of
rebooting. It still updates the BootOrder on successful boot to allow
cold-boots if the server crashes or loses power, but no longer uses the
NextBoot mechanism to boot into the new slot once (this is taken care of
by kexec).
Change-Id: I6092c47d988634ba39fb6bdd7fd7ccd41ceb02ef
Reviewed-on: https://review.monogon.dev/c/monogon/+/2021
Reviewed-by: Serge Bazanski <serge@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/core/update/BUILD.bazel b/metropolis/node/core/update/BUILD.bazel
index 143231b..e3cdcd1 100644
--- a/metropolis/node/core/update/BUILD.bazel
+++ b/metropolis/node/core/update/BUILD.bazel
@@ -10,9 +10,11 @@
"//metropolis/pkg/blockdev",
"//metropolis/pkg/efivarfs",
"//metropolis/pkg/gpt",
+ "//metropolis/pkg/kexec",
"//metropolis/pkg/logtree",
"@com_github_cenkalti_backoff_v4//:backoff",
"@org_golang_google_grpc//codes",
"@org_golang_google_grpc//status",
+ "@org_golang_x_sys//unix",
],
)