Some fixes

debian_nfs.sh

@@ -4,7 +4,7 @@
 # NFS export is /home/nfsboot
 # TFTP root is /home/tftp
 
-set -e
+set -e -x
 
 SERVER=172.31.1.5
 SUBNET=172.31.1.0/24
@@ -14,10 +14,9 @@ CFG=`dirname $0`/debian_nfs.conf
 
 apt-get -y install pxelinux syslinux-common nfs-kernel-server dnsmasq
 
-echo "/home/nfsboot $SUBNET(ro,no_root_squash)" >> /etc/exports
-
-service nfs-kernel-server restart
-service rpcbind restart
+mkdir -p /home/tftp
+cp /usr/lib/PXELINUX/pxelinux.0 /home/tftp
+cp /usr/lib/syslinux/modules/bios/ldlinux.c32 /home/tftp
 
 cat >/etc/dnsmasq.conf <<EOF
 port=0
@@ -33,13 +32,14 @@ EOF
 
 service dnsmasq restart
 
-mkdir -p /home/tftp
-cp /usr/lib/PXELINUX/pxelinux.0 /home/tftp
-cp /usr/lib/syslinux/modules/bios/ldlinux.c32 /home/tftp
 mkdir -p /home/nfsboot
-debootstrap buster /home/nfsboot
+((grep -v /home/nfsboot /etc/exports || true); echo "/home/nfsboot $SUBNET(ro,no_root_squash)") > /etc/exports1
+mv /etc/exports1 /etc/exports
+exportfs -r
+
+#debootstrap buster /home/nfsboot
 
-git clone https://github.com/chesty/overlayroot /home/overlayroot
+[ -d /home/overlayroot ] || git clone https://github.com/chesty/overlayroot /home/overlayroot
 mkdir -p /home/nfsboot/etc/initramfs-tools/hooks
 mkdir -p /home/nfsboot/etc/initramfs-tools/scripts/init-bottom
 cp /home/overlayroot/hooks-overlay /home/nfsboot/etc/initramfs-tools/hooks/