luks: implements support for centos

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

templates/centos.Dockerfile

@@ -7,12 +7,20 @@ RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* && \
 
 RUN yum update -y
 
-RUN yum install -y kernel systemd NetworkManager e2fsprogs sudo && \
+RUN yum install -y \
+    kernel \
+    systemd \
+    NetworkManager \
+    e2fsprogs \
+    {{- if .Luks }}
+    cryptsetup \
+    {{- end }}
+    sudo && \
     systemctl enable NetworkManager && \
     systemctl unmask systemd-remount-fs.service && \
     systemctl unmask getty.target
 
-RUN dracut --no-hostonly --regenerate-all --force && \
+RUN dracut --no-hostonly --regenerate-all --force {{ if .Luks }}--install="/usr/sbin/cryptsetup"{{ end }}&& \
     cd /boot && \
     ln -s $(find . -name 'vmlinuz-*') vmlinuz && \
     ln -s $(find . -name 'initramfs-*.img') initrd.img