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authorAlex Kiernan <alex.kiernan@gmail.com>2019-05-08 16:57:26 +0100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2019-05-09 16:31:06 +0100
commitc5fb399f5894c16cf8eeadd507dc38c29b0fd657 (patch)
treeb1727a8ab12746d5951d947ac540a5a44946a0b9 /meta/recipes-core/systemd
parentddc2baa8b7ef6ecd6ed450bb8b3ed986b6797d9f (diff)
downloadopenembedded-core-contrib-c5fb399f5894c16cf8eeadd507dc38c29b0fd657.tar.gz
systemd: Default to non-stateless images
When creating images, for anything other than the explicitly stateless case, touch /etc/machine-id so that the images can be booted without an initramfs and with `ro` set on the kernel command line, otherwise system refuses to start: [ 7.222134] systemd[1]: No hostname configured. [ 7.227266] systemd[1]: Set hostname to <localhost>. [ 7.232622] systemd[1]: System cannot boot: Missing /etc/machine-id and /etc is mounted read-only. [ 7.241750] systemd[1]: Booting up is supported only when: [ 7.247362] systemd[1]: 1) /etc/machine-id exists and is populated. [ 7.253752] systemd[1]: 2) /etc/machine-id exists and is empty. [ 7.259757] systemd[1]: 3) /etc/machine-id is missing and /etc is writable. If IMAGE_FEATURES includes `stateless-rootfs` then systemctl-native is not run on the image leaving the image for population at runtime by systemd. Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-core/systemd')
-rwxr-xr-xmeta/recipes-core/systemd/systemd-systemctl/systemctl9
1 files changed, 9 insertions, 0 deletions
diff --git a/meta/recipes-core/systemd/systemd-systemctl/systemctl b/meta/recipes-core/systemd/systemd-systemctl/systemctl
index d7d4e0d29a0..7fdaf8ce03d 100755
--- a/meta/recipes-core/systemd/systemd-systemctl/systemctl
+++ b/meta/recipes-core/systemd/systemd-systemctl/systemctl
@@ -241,6 +241,15 @@ def preset_all(root):
if state == "enable" or state is None:
enable(root, service, location, services)
+ # If we populate the systemd links we also create /etc/machine-id, which
+ # allows systemd to boot with the filesystem read-only before generating
+ # a real value and then committing it back.
+ #
+ # For the stateless configuration, where /etc is generated at runtime
+ # (for example on a tmpfs), this script shouldn't run at all and we
+ # allow systemd to completely populate /etc.
+ (root / SYSCONFDIR / "machine-id").touch()
+
def mask(root, *services):
systemdir = root / SYSCONFDIR / "systemd" / "system"