Re: [andreas.r...@siemens.com: Re: Fwd: [PATCH 1/1] meta/ext4-img: refactor to fit current image creation methods]

[Henning Schild <henning.schild@siemens.com>]

Am Tue, 26 Feb 2019 05:39:17 -0800
schrieb <cedric_hombourger@mentor.com>:

> On Tuesday, February 26, 2019 at 2:33:28 PM UTC+1, Andreas Reichel
> wrote:
> >
> >
> > We (at least me) have no scenario where we really build update
> > artifacts with isar. One important question is, if the ext4 image
> > is exactly the size of its contents or if it is the final partition
> > size. If it is exactly the size of its contents only, it cannot be
> > used as an update artifact because the resulting rootfs would have
> > 0 bytes free and likely won't boot. 
> >
> >  
> postinstall steps can be used to "resize2fs" the file-system after it
> was installed
>  
> 
> >
> > So I would go Henning's way to extract the partition images... 
> >
> >  
> It sure works. I however don't see much harm in keeping the ext4_img
> class I would not expect much maintenance overhead there...

Yes, agreed. I just thought is can be deprecated with wic, just looking
at our internal layers and Isar itself. If that is not the case, let us
keep it.

Henning

> 
> > Also we already have wic dependencies like sfdisk etc installed,
> > where we can dump partition lists and use grep and dd. 
> >
> > Andreas 
> >  
> > > Henning 
> > >   
> > > > Jan 
> > > >   
> > >   
> >  
> > > Date: Tue, 26 Feb 2019 13:12:18 +0100 
> > > From: Henning Schild <henning...@siemens.com <javascript:>> 
> > > To: "[ext] Jan Kiszka" <jan.k...@siemens.com <javascript:>> 
> > > CC: cedric_h...@mentor.com <javascript:>, isar-users <  
> > isar-...@googlegroups.com <javascript:>>,   
> > >  Andreas Reichel <Andreas...@tngtech.com <javascript:>> 
> > > Subject: Re: [PATCH 1/1] meta/ext4-img: refactor to fit current
> > > image creation methods 
> > > X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) 
> > > 
> > > Am Tue, 26 Feb 2019 12:56:20 +0100 
> > > schrieb "[ext] Jan Kiszka" <jan.k...@siemens.com <javascript:>>: 
> > >   
> > > > On 26.02.19 12:35, cedric_h...@mentor.com <javascript:>
> > > > wrote:   
> > > > > Hi Henning, 
> > > > > 
> > > > > One use-case on our side is the generation of SWUpdate image.
> > > > > Our helper class uses do_ext4_image to generate the
> > > > > file-system image we later embed into the .swu file     
> > > > 
> > > > Andreas, how do you address that scenario for upstream SWUpdate 
> > > > support?   
> > > 
> > > I guess a valid way would be to have a task after do_wic which
> > > will extract all raw partitions if enabled. It is kind of stupid
> > > but if we can not change wic we better build around and reuse
> > > instead of reimplement. 
> > > 
> > > Henning 
> > >   
> > > > Jan 
> > > >   
> > >   
> >  
> > > Date: Tue, 26 Feb 2019 12:56:20 +0100 
> > > From: Jan Kiszka <jan.k...@siemens.com <javascript:>> 
> > > To: cedric_h...@mentor.com <javascript:>, isar-users <  
> > isar-...@googlegroups.com <javascript:>>,   
> > >  Andreas Reichel <Andreas...@tngtech.com <javascript:>> 
> > > Subject: Re: [PATCH 1/1] meta/ext4-img: refactor to fit current
> > > image creation methods 
> > > User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de;
> > > rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1
> > > Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 
> > > 
> > > On 26.02.19 12:35, cedric_h...@mentor.com <javascript:> wrote:   
> > > > Hi Henning, 
> > > > 
> > > > One use-case on our side is the generation of SWUpdate 
> > > > image. Our helper class uses do_ext4_image to generate the 
> > > > file-system image we later embed into the .swu file   
> > > 
> > > Andreas, how do you address that scenario for upstream SWUpdate
> > > support? 
> > > 
> > > Jan 
> > > 
> > > -- 
> > > Siemens AG, Corporate Technology, CT RDA IOT SES-DE 
> > > Corporate Competence Center Embedded Linux   
> >
> >
> > -- 
> > Andreas Reichel 
> > Dipl.-Phys. (Univ.) 
> > Software Consultant 
> >
> > Andreas...@tngtech.com <javascript:>, +49-174-3180074 
> > TNG Technology Consulting GmbH, Betastr. 13a, 85774 Unterfoehring 
> > Geschaeftsfuehrer: Henrik Klagges, Dr. Robert Dahlke, Gerhard
> > Mueller Sitz: Unterfoehring * Amtsgericht Muenchen * HRB 135082 
> >
> >
> > ----- End forwarded message ----- 
> >
> > -- 
> > Andreas Reichel 
> > Dipl.-Phys. (Univ.) 
> > Software Consultant 
> >
> > Andreas...@tngtech.com <javascript:>, +49-174-3180074 
> > TNG Technology Consulting GmbH, Betastr. 13a, 85774 Unterfoehring 
> > Geschaeftsfuehrer: Henrik Klagges, Dr. Robert Dahlke, Gerhard
> > Mueller Sitz: Unterfoehring * Amtsgericht Muenchen * HRB 135082 
> >
> >  
>