Libguestfs - Aug 2016 - [PATCH 1/2] v2v: linux: correctly reconfigure the initrd on Debian

Using update-initramfs is the native way of updating initrd on Debian
based systems.

Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
---
 v2v/convert_linux.ml | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/v2v/convert_linux.ml b/v2v/convert_linux.ml
index 47fec9e..103728b 100644
--- a/v2v/convert_linux.ml
+++ b/v2v/convert_linux.ml
@@ -865,6 +865,15 @@ let rec convert ~keep_serial_console (g : G.guestfs)
inspect source rcaps          ignore (g#command (Array.of_list args))
       in
 
+      let run_update_initramfs_command () +        let args +         
"/usr/sbin/update-initramfs"  ::
+            (if verbose () then [ "-v" ] else [])
+          @ [ "-c"; "-k"; mkinitrd_kv ]
+        in
+        ignore (g#command (Array.of_list args))
+      in
+
       if g#is_file ~followsymlinks:true "/sbin/dracut" then
         run_dracut_command "/sbin/dracut"
       else if g#is_file ~followsymlinks:true "/usr/bin/dracut" then
@@ -878,6 +887,18 @@ let rec convert ~keep_serial_console (g : G.guestfs)
inspect source rcaps                         "-k"; kernel.ki_vmlinuz
|]
         )
       )
+      else if family = `Debian_family then (
+        if not (g#is_file ~followsymlinks:true
"/usr/sbin/update-initramfs") then
+          error (f_"unable to rebuild initrd (%s) because update-initramfs
was not found in the guest")
+            initrd;
+
+        (* The modules to add to initrd are defined in a file. *)
+        let modules = String.concat "\n" modules in
+        let modules = "#\n# Added by virt-v2v\n" ^ modules ^
"\n" in
+        ignore (g#write_append "/etc/initramfs-tools/modules"
modules);
+
+        run_update_initramfs_command ()
+      )
       else if g#is_file ~followsymlinks:true "/sbin/mkinitrd" then (
         let module_args = List.map (sprintf "--with=%s") modules in
         let args -- 
2.9.2