Alpine on a Raspberry (part 2)
I had to buy a new raspberry (the old one did not survive :p), a version 3 A+. Now, I will go over again the installation process. Since I encountered a few new problems.
Setup SD Card
This is exactly the same as the previous version. So I let you check out the other article.
First boot and in-memory setup
Here a few changes, using a version 3A+ requires to setup the wifi. Following this wiki, here are the steps I followed:
# first install the necessary packages
apk add wpa_supplicant
# setup the config file
wpa_passphrase 'ExampleWifi' 'ExampleWifiPassword' > /etc/wpa_supplicant/wpa_supplicant.conf
# start the service
wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf
# request a dhcp lease
udhcpc -i wlan0
# enforce the service startup at boot
rc-update add wpa_supplicant boot
Fix the clock: I found a better solution to the clock problem in alpine. This is a mix of this article and this one.
# install package
apk add chrony
# add the service to the boot
rc-update add chronyd boot
# create a file to signal usage of this hack
touch /etc/init.d/.use-swclock
# we need to insert a hack in the file
# https://github.com/OpenRC/openrc/blob/master/sh/init.sh.Linux.in#L53
sed -i '53iif [ -e /etc/init.d/.use-swclock ]; then\n' /lib/rc/sh/init.sh
sed -i '54i\t“$RC_LIBEXECDIR/sbin/swclock” /etc/init.d\n' /lib/rc/sh/init.sh
sed -i '55ifi' /lib/rc/sh/init.sh
Once this done, you can stick to the previous install instructions.
Doing the persistent install
The steps are the same as the previous one except for the boot part. I had to use those instructions from the wiki.
# fix the boot directories
rm -f /media/mmcblk0p1/boot/*
cd /mnt
rm boot/boot
mv boot/* /media/mmcblk0p1/boot/
rm -Rf boot
mkdir media/mmcblk0p1
ln -s media/mmcblk0p1/boot boot
# fix the fstab
cat > etc/fstab <<- EOF
/dev/mmcblk0p2 / ext4 defaults 0 0
/dev/mmcblk0p1 /media/mmcblk0p1 vfat defaults 0 0
EOF
# fix the kernel boot flags
sed -i 's/^/root=\/dev\/mmcblk0p2 /' /media/mmcblk0p1/cmdline.txt