I also came across that issue when building images using my tool called edi
using the edi-pi project configuration:
https://github.com/lueschem/edi-pi
I suggest the following fix (it also covers the case where a container is
taken instead of a chroot):
>From 73d8a0c4a6cbe082ae31f81dc6af7031b5007c54 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20L=C3=BCscher?= <luesc...@gmail.com>
Date: Sun, 14 Jan 2018 17:27:48 +0100
Subject: [PATCH 1/5] Do not check mount point if virtualization gets
detected.
---
debian/kernel/postinst.d/raspi3-firmware | 12 +++++++-----
debian/raspi3-firmware.postinst | 14 +++++++++-----
2 files changed, 16 insertions(+), 10 deletions(-)
diff --git a/debian/kernel/postinst.d/raspi3-firmware
b/debian/kernel/postinst.d/raspi3-firmware
index fe89560..deacec9 100755
--- a/debian/kernel/postinst.d/raspi3-firmware
+++ b/debian/kernel/postinst.d/raspi3-firmware
@@ -31,11 +31,13 @@ case "$1" in
;;
esac
-if ! ischroot; then
- if ! mountpoint -q /boot/firmware; then
- echo "raspi3-firmware: missing /boot/firmware, did you forget to mount
it?" >&2
- exit 1
- fi
+if ischroot ; then
+ : chroot detected - skip mount point check
+elif test -e /usr/bin/systemd-detect-virt && systemd-detect-virt -q ; then
+ : virtualization detected - skip mount point check
+elif ! mountpoint -q /boot/firmware; then
+ echo "raspi3-firmware: missing /boot/firmware, did you forget to mount
it?" >&2
+ exit 1
fi
latest_kernel=$(ls -1 /boot/vmlinuz-* | grep -v '\.dpkg-bak$' | sort -V -r
| head -1)
diff --git a/debian/raspi3-firmware.postinst
b/debian/raspi3-firmware.postinst
index 236b389..01bdcf8 100644
--- a/debian/raspi3-firmware.postinst
+++ b/debian/raspi3-firmware.postinst
@@ -6,11 +6,15 @@ set -e
case "$1" in
configure)
- if ! ischroot; then
- if ! mountpoint -q /boot/firmware; then
- echo "Error: missing /boot/firmware, did you forget to mount it?"
>&2
- exit 1
- fi
+ if ischroot ; then
+ # chroot detected - skip mount point check
+ mkdir -p /boot/firmware
+ elif test -e /usr/bin/systemd-detect-virt && systemd-detect-virt -q ;
then
+ # virtualization detected - skip mount point check
+ mkdir -p /boot/firmware
+ elif ! mountpoint -q /boot/firmware; then
+ echo "Error: missing /boot/firmware, did you forget to mount it?" >&2
+ exit 1
fi
for file in /usr/lib/raspi3-firmware/*
--
2.7.4
