add patch-alpine-netboot-image-with-zfs.sh PatchFile-init-ping

Author: chrisjsimpson

PatchFile-init-ping

@@ -0,0 +1,24 @@
+--- init.old	2023-09-04 13:51:43.491748438 +0100
++++ init	2023-09-04 13:53:02.331764604 +0100
+@@ -219,6 +219,21 @@
+ 		if ifconfig "$device" "$client_ip" netmask "$netmask"; then
+ 			[ -z "$gw_ip" ] || ip route add 0.0.0.0/0 via "$gw_ip" dev "$device"
+ 		fi
++
++		while true; do
++				ping -c 1 -w 1 8.8.8.8
++				if [ $? -eq 0 ]; then
++						echo "Ping successful!"
++						break
++				else
++						echo "Ping failed. Retrying..."
++						sleep 1
++				fi
++		done
++
++		echo Hard coding DNS entry
++		echo "nameserver 8.8.8.8" >> /etc/resolv.conf 
++
+ 		eend $?
+ 	fi
+ 

patch-alpine-netboot-image-with-zfs.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+# Purpose: Patch alpine netboot image with
+# - include zfs kernel module by default
+#   (note the 'alpine extended iso' includes the zfs module
+#    but that is not a netboot image)
+# - ping delay wait until network links are up and can
+#   reach gateway
+#
+
+set -x
+
+# Force a wait for interfaces to come up
+# on slow switches
+
+tar -xvf alpine-netboot-*.tar.gz
+
+WORK_DIR=$PWD
+cd iso/boot
+
+mkdir patch
+
+zcat initramfs-lts | cpio -D patch --extract --make-directories --preserve-modification-time
+
+cd patch
+
+# Apply the initramfs-lts patch
+patch init ../../../PatchFile-init-ping
+
+# Re-package initramfs-lts
+find . | cpio --format=newc --create | gzip > initramfs-lts
+mv initramfs-lts ../
+
+cd ../
+rm -rf patch
+
+# Re-tar the netbook image for sending to boot server
+tar -cvf alpine-netboot-zfs.tar.gz ./
+
+cd $WORK_DIR