Libguestfs - Feb 2020 - Re: [PATCH 2/2] firstboot: schedule firstboot as delayed task

When firstboot is used from virt-v2v the scripts, if not fast enough, can get
killed by Windows. After windows installs virtio drivers injected by virt-v2v
it performs some internall reboot, stopping all the running services and
killing any running firstboot script. This is problem mostly for MSI installs
(like qemu-ga that was added recently) that can take several seconds to finish.

This change is little bit controversial in fact that it relies on powershell.
This is not available in early versions (without service packs) of XP and 2003
and our support matrix still mentions these Windows versions.

The change can also be problem for those who really wish to perform an action
early in the boot... if there are such users.

Tomáš Golembiovský (2):
  firstboot: use absolute path to rhsrvany
  firstboot: schedule firstboot as delayed task

 mlcustomize/firstboot.ml | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

-- 
2.24.0

Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
---
 mlcustomize/firstboot.ml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mlcustomize/firstboot.ml b/mlcustomize/firstboot.ml
index a8f4ef7..c3ebfd9 100644
--- a/mlcustomize/firstboot.ml
+++ b/mlcustomize/firstboot.ml
@@ -307,7 +307,7 @@ for %%%%f in (\"%%scripts%%\"\\*.bat) do (
 )
 
 echo uninstalling firstboot service
-%s -s firstboot uninstall
+\"%%firstboot%%\\%s\" -s firstboot uninstall
 " firstboot_dir_win srvany in
 
     g#write (firstboot_dir // "firstboot.bat")
-- 
2.24.0

Instead of running firstboot scripts during early boot schedule a task
delayed for 1-2 minute.

During the first boot, after virt-v2v conversion, Windows installs the
drivers injected by virit-v2v. When this installation is finished
Windows enforces some kind of internal reboot. This unfortunately
terminates any running firstboot scritps thus killing for example the
installation of qemu-ga MSI.

Hopefully delaying the installtion to some later time can also fix
problem we sometimes saw on Windows 2012R2 when installing RHEV-APT,
where the installer terminated immediately with the error:

  Failed to connect to server. Error: 0x8007045B

Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
---
 mlcustomize/firstboot.ml | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/mlcustomize/firstboot.ml b/mlcustomize/firstboot.ml
index c3ebfd9..b4ca181 100644
--- a/mlcustomize/firstboot.ml
+++ b/mlcustomize/firstboot.ml
@@ -286,10 +286,18 @@ set log=%%firstboot%%\\log.txt
 set scripts=%%firstboot%%\\scripts
 set scripts_done=%%firstboot%%\\scripts-done
 
-call :main >> \"%%log%%\" 2>&1
+call :main %%1 >> \"%%log%%\" 2>&1
 exit /b
 
 :main
+
+if not '%%1' == 'real' (
+    REM schedule delayed task
+    schtasks.exe /Delete /TN Firstboot /F
+    powershell.exe -command \"$d = (get-date).AddSeconds(119);
schtasks.exe /Create /SC ONCE /ST $d.ToString('HH:mm') /SD
$d.ToString('MM/dd/yyyy') /RU SYSTEM /TN Firstboot /TR \\\"%%~dpnx0
real\\\"\"
+    exit /b
+)
+
 echo starting firstboot service
 
 if not exist \"%%scripts_done%%\" (
-- 
2.24.0

On Thu, Nov 21, 2019 at 12:04:17PM +0100, Tomáš Golembiovský
wrote:
> Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
> ---
>  mlcustomize/firstboot.ml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mlcustomize/firstboot.ml b/mlcustomize/firstboot.ml
> index a8f4ef7..c3ebfd9 100644
> --- a/mlcustomize/firstboot.ml
> +++ b/mlcustomize/firstboot.ml
> @@ -307,7 +307,7 @@ for %%%%f in (\"%%scripts%%\"\\*.bat) do (
>  )
>  
>  echo uninstalling firstboot service
> -%s -s firstboot uninstall
> +\"%%firstboot%%\\%s\" -s firstboot uninstall
>  " firstboot_dir_win srvany in
>  
>      g#write (firstboot_dir // "firstboot.bat")
I have pushed this one.  It will need an update to libguestfs and/or
virt-v2v in order to pick up the change, which I'll roll into a later
change.

Thanks,

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top

On Thu, Nov 21, 2019 at 12:04:18PM +0100, Tomáš Golembiovský
wrote:
> Instead of running firstboot scripts during early boot schedule a task
> delayed for 1-2 minute.
> 
> During the first boot, after virt-v2v conversion, Windows installs the
> drivers injected by virit-v2v. When this installation is finished
> Windows enforces some kind of internal reboot. This unfortunately
> terminates any running firstboot scritps thus killing for example the
> installation of qemu-ga MSI.
> 
> Hopefully delaying the installtion to some later time can also fix
> problem we sometimes saw on Windows 2012R2 when installing RHEV-APT,
> where the installer terminated immediately with the error:
> 
>   Failed to connect to server. Error: 0x8007045B
> 
> Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
> ---
>  mlcustomize/firstboot.ml | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/mlcustomize/firstboot.ml b/mlcustomize/firstboot.ml
> index c3ebfd9..b4ca181 100644
> --- a/mlcustomize/firstboot.ml
> +++ b/mlcustomize/firstboot.ml
> @@ -286,10 +286,18 @@ set log=%%firstboot%%\\log.txt
>  set scripts=%%firstboot%%\\scripts
>  set scripts_done=%%firstboot%%\\scripts-done
>  
> -call :main >> \"%%log%%\" 2>&1
> +call :main %%1 >> \"%%log%%\" 2>&1
>  exit /b
>  
>  :main
> +
> +if not '%%1' == 'real' (
> +    REM schedule delayed task
> +    schtasks.exe /Delete /TN Firstboot /F
> +    powershell.exe -command \"$d = (get-date).AddSeconds(119);
schtasks.exe /Create /SC ONCE /ST $d.ToString('HH:mm') /SD
$d.ToString('MM/dd/yyyy') /RU SYSTEM /TN Firstboot /TR \\\"%%~dpnx0
real\\\"\"
> +    exit /b
> +)
> +
>  echo starting firstboot service
I have really no clue about this.

What is "~dpnx0"?

I wwill say that in general we do need a way that we can order
firstboot scripts so that some run before others.  At the moment the
Windows static IP script sometimes runs before the network device is
created (see https://bugzilla.redhat.com/1788823).  I guess we could
hack that by making the sleep time above settable when registering a
firstboot script, but what we really need is some kind of dependency
system.  I have no idea if Windows has a mechanism to do this already.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-df lists disk usage of guests without needing to install any
software inside the virtual machine.  Supports Linux and Windows.
http://people.redhat.com/~rjones/virt-df/