add fat32 boot partition support

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

templates/alpine.Dockerfile

@@ -14,7 +14,8 @@ RUN apk update --no-cache && \
 {{- else }}
       busybox-initscripts \
 {{- end }}
-      openrc
+      openrc && \
+      find /boot -type l -exec rm {} \;
 
 RUN for s in bootmisc hostname hwclock modules networking swap sysctl urandom syslog; do rc-update add $s boot; done
 RUN for s in devfs dmesg hwdrivers mdev; do rc-update add $s sysinit; done

templates/centos.Dockerfile

@@ -18,10 +18,13 @@ RUN yum install -y \
     sudo && \
     systemctl enable NetworkManager && \
     systemctl unmask systemd-remount-fs.service && \
-    systemctl unmask getty.target && \
-    cd /boot && \
-    ln -s $(find . -name 'vmlinuz-*') vmlinuz && \
-    ln -s $(find . -name 'initramfs-*.img') initrd.img
+    systemctl unmask getty.target
+
+{{- if not .Grub }}
+RUN cd /boot && \
+        mv $(find . -name 'vmlinuz-*') /boot/vmlinuz && \
+        mv $(find . -name 'initramfs-*.img') /boot/initrd.img
+{{- end }}
 
 {{ if .Luks }}
 RUN yum install -y cryptsetup && \

templates/debian.Dockerfile

@@ -12,7 +12,13 @@ RUN echo "deb http://archive.debian.org/debian stretch main" > /etc/apt/sources.
 
 RUN apt-get -y update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends \
-      linux-image-amd64
+      linux-image-amd64 && \
+      find /boot -type l -exec rm {} \;
+
+{{- if not .Grub }}
+RUN mv $(find /boot -name 'vmlinuz-*') /boot/vmlinuz && \
+      mv $(find /boot -name 'initrd.img-*') /boot/initrd.img
+{{- end }}
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
       systemd-sysv \

templates/ubuntu.Dockerfile

@@ -14,7 +14,13 @@ RUN apt-get update -y && \
   dbus \
   isc-dhcp-client \
   iproute2 \
-  iputils-ping
+  iputils-ping && \
+  find /boot -type l -exec rm {} \;
+
+{{- if not .Grub }}
+RUN mv $(find /boot -name 'vmlinuz-*') /boot/vmlinuz && \
+      mv $(find /boot -name 'initrd.img-*') /boot/initrd.img
+{{- end }}
 
 RUN systemctl preset-all