Live images?

Live images?

[Gary Thomas]

Looking through the Poky/Yocto sources, there seems to be
some support for Live CD/USB images.  However, I can't find
any examples nor documentation for how to use this.

Can anyone provide some pointers?

Thanks

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: Live images?

[Paul Eggleton]

Hi Gary,

On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
> Looking through the Poky/Yocto sources, there seems to be
> some support for Live CD/USB images.  However, I can't find
> any examples nor documentation for how to use this.
> 
> Can anyone provide some pointers?

You're right, we seem to be missing that in our documentation; I'm not sure 
where the best place to document it would be though.

FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then you 
should get a .directdisk image that you can just dd to a USB stick.

Cheers,
Paul


-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: Live images?

[Paul Eggleton]

On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
> Hi Gary,
> 
> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
> > Looking through the Poky/Yocto sources, there seems to be
> > some support for Live CD/USB images.  However, I can't find
> > any examples nor documentation for how to use this.
> > 
> > Can anyone provide some pointers?
> 
> You're right, we seem to be missing that in our documentation; I'm not sure
> where the best place to document it would be though.
> 
> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then you
> should get a .directdisk image that you can just dd to a USB stick.

Of course I meant to say .hddimg, not .directdisk.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: Live images?

[Gary Thomas]

On 2014-06-05 08:32, Paul Eggleton wrote:
> On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
>> Hi Gary,
>>
>> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
>>> Looking through the Poky/Yocto sources, there seems to be
>>> some support for Live CD/USB images.  However, I can't find
>>> any examples nor documentation for how to use this.
>>>
>>> Can anyone provide some pointers?
>>
>> You're right, we seem to be missing that in our documentation; I'm not sure
>> where the best place to document it would be though.
>>
>> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then you
>> should get a .directdisk image that you can just dd to a USB stick.
>
> Of course I meant to say .hddimg, not .directdisk.

Thanks, I'll give that a try.

What if I needed to boot from an actual CD?  I have an old
box here I'd like to try, but it doesn't boot from USB.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: Live images?

[Paul Eggleton]

On Thursday 05 June 2014 08:41:57 Gary Thomas wrote:
> On 2014-06-05 08:32, Paul Eggleton wrote:
> > On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
> >> Hi Gary,
> >> 
> >> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
> >>> Looking through the Poky/Yocto sources, there seems to be
> >>> some support for Live CD/USB images.  However, I can't find
> >>> any examples nor documentation for how to use this.
> >>> 
> >>> Can anyone provide some pointers?
> >> 
> >> You're right, we seem to be missing that in our documentation; I'm not
> >> sure
> >> where the best place to document it would be though.
> >> 
> >> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then you
> >> should get a .directdisk image that you can just dd to a USB stick.
> > 
> > Of course I meant to say .hddimg, not .directdisk.
> 
> Thanks, I'll give that a try.
> 
> What if I needed to boot from an actual CD?  I have an old
> box here I'd like to try, but it doesn't boot from USB.

We can produce ISO images but I don't think that they work quite as well, 
e.g.:

https://bugzilla.yoctoproject.org/show_bug.cgi?id=5282

You could always try it though.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: Live images?

[Gary Thomas]

On 2014-06-05 09:07, Paul Eggleton wrote:
> On Thursday 05 June 2014 08:41:57 Gary Thomas wrote:
>> On 2014-06-05 08:32, Paul Eggleton wrote:
>>> On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
>>>> Hi Gary,
>>>>
>>>> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
>>>>> Looking through the Poky/Yocto sources, there seems to be
>>>>> some support for Live CD/USB images.  However, I can't find
>>>>> any examples nor documentation for how to use this.
>>>>>
>>>>> Can anyone provide some pointers?
>>>>
>>>> You're right, we seem to be missing that in our documentation; I'm not
>>>> sure
>>>> where the best place to document it would be though.
>>>>
>>>> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then you
>>>> should get a .directdisk image that you can just dd to a USB stick.
>>>
>>> Of course I meant to say .hddimg, not .directdisk.
>>
>> Thanks, I'll give that a try.
>>
>> What if I needed to boot from an actual CD?  I have an old
>> box here I'd like to try, but it doesn't boot from USB.
>
> We can produce ISO images but I don't think that they work quite as well,
> e.g.:
>
> https://bugzilla.yoctoproject.org/show_bug.cgi?id=5282
>
> You could always try it though.

Bummer, when I tried to build core-image-minimal and/or core-image-x11, it failed:

| DEBUG: Executing shell function read_only_rootfs_hook
| sed: can't read /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-minimal-initramfs/1.0-r0/rootfs/etc/fstab: No such file or directory
| WARNING: /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-minimal-initramfs/1.0-r0/temp/run.read_only_rootfs_hook.30446:1 exit 2 from
|   sed -i -e '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]\)\([[:space:]]*\)[[:digit:]]$/\1\20/}' 
/home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-minimal-initramfs/1.0-r0/rootfs/etc/fstab
| DEBUG: Python function do_rootfs finished
| ERROR: Function failed: read_only_rootfs_hook (log file is located at 
/home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-minimal-initramfs/1.0-r0/temp/log.do_rootfs.30446)

Using these settings:
Build Configuration:
BB_VERSION        = "1.23.1"
BUILD_SYS         = "i686-linux"
NATIVELSBSTRING   = "Fedora-13"
TARGET_SYS        = "i586-poky-linux"
MACHINE           = "genericx86"
DISTRO            = "poky"
DISTRO_VERSION    = "1.6+snapshot-20140605"
TUNE_FEATURES     = "m32 core2"
TARGET_FPU        = ""
meta
meta-yocto
meta-yocto-bsp    = "master:e7114046be6e71fb326477dc882adb814ef6a751"

Extra settings in conf/local.conf
# Live CD setup
IMAGE_FSTYPES_append = " hddimg live"
IMAGE_FEATURES_append = " read-only-rootfs"
CORE_IMAGE_EXTRA_INSTALL_append = " python python-modules"

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: Live images?

[Paul Eggleton]

On Thursday 05 June 2014 11:16:55 Gary Thomas wrote:
> On 2014-06-05 09:07, Paul Eggleton wrote:
> > On Thursday 05 June 2014 08:41:57 Gary Thomas wrote:
> >> On 2014-06-05 08:32, Paul Eggleton wrote:
> >>> On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
> >>>> Hi Gary,
> >>>> 
> >>>> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
> >>>>> Looking through the Poky/Yocto sources, there seems to be
> >>>>> some support for Live CD/USB images.  However, I can't find
> >>>>> any examples nor documentation for how to use this.
> >>>>> 
> >>>>> Can anyone provide some pointers?
> >>>> 
> >>>> You're right, we seem to be missing that in our documentation; I'm not
> >>>> sure
> >>>> where the best place to document it would be though.
> >>>> 
> >>>> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then
> >>>> you
> >>>> should get a .directdisk image that you can just dd to a USB stick.
> >>> 
> >>> Of course I meant to say .hddimg, not .directdisk.
> >> 
> >> Thanks, I'll give that a try.
> >> 
> >> What if I needed to boot from an actual CD?  I have an old
> >> box here I'd like to try, but it doesn't boot from USB.
> > 
> > We can produce ISO images but I don't think that they work quite as well,
> > e.g.:
> > 
> > https://bugzilla.yoctoproject.org/show_bug.cgi?id=5282
> > 
> > You could always try it though.
> 
> Bummer, when I tried to build core-image-minimal and/or core-image-x11, it 
failed:
> | DEBUG: Executing shell function read_only_rootfs_hook
> | sed: can't read
> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
> | -minimal-initramfs/1.0-r0/rootfs/etc/fstab: No such file or directory
> | WARNING:
> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
> | -minimal-initramfs/1.0-r0/temp/run.read_only_rootfs_hook.30446:1 exit 2
> | from| 
> |   sed -i -e
> |   '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]
> |   \)\([[:space:]]*\)[[:digit:]]$/\1\20/}'
> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
> nimal-initramfs/1.0-r0/rootfs/etc/fstab
> | DEBUG: Python function do_rootfs finished
> | ERROR: Function failed: read_only_rootfs_hook (log file is located at
> 
> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
> nimal-initramfs/1.0-r0/temp/log.do_rootfs.30446)
> 
> Using these settings:
> Build Configuration:
> BB_VERSION        = "1.23.1"
> BUILD_SYS         = "i686-linux"
> NATIVELSBSTRING   = "Fedora-13"
> TARGET_SYS        = "i586-poky-linux"
> MACHINE           = "genericx86"
> DISTRO            = "poky"
> DISTRO_VERSION    = "1.6+snapshot-20140605"
> TUNE_FEATURES     = "m32 core2"
> TARGET_FPU        = ""
> meta
> meta-yocto
> meta-yocto-bsp    = "master:e7114046be6e71fb326477dc882adb814ef6a751"
> 
> Extra settings in conf/local.conf
> # Live CD setup
> IMAGE_FSTYPES_append = " hddimg live"

"hddimg" isn't a valid IMAGE_FSTYPES item.

Also, try IMAGE_FSTYPES += rather than _append, that allows the initramfs 
image to have its own value (because it's not really valid to make a live 
initramfs...)

> IMAGE_FEATURES_append = " read-only-rootfs"

Try EXTRA_IMAGE_FEATURES += instead of IMAGE_FEATURES_append

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: Live images?

[Gary Thomas]

On 2014-06-05 11:24, Paul Eggleton wrote:
> On Thursday 05 June 2014 11:16:55 Gary Thomas wrote:
>> On 2014-06-05 09:07, Paul Eggleton wrote:
>>> On Thursday 05 June 2014 08:41:57 Gary Thomas wrote:
>>>> On 2014-06-05 08:32, Paul Eggleton wrote:
>>>>> On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
>>>>>> Hi Gary,
>>>>>>
>>>>>> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
>>>>>>> Looking through the Poky/Yocto sources, there seems to be
>>>>>>> some support for Live CD/USB images.  However, I can't find
>>>>>>> any examples nor documentation for how to use this.
>>>>>>>
>>>>>>> Can anyone provide some pointers?
>>>>>>
>>>>>> You're right, we seem to be missing that in our documentation; I'm not
>>>>>> sure
>>>>>> where the best place to document it would be though.
>>>>>>
>>>>>> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then
>>>>>> you
>>>>>> should get a .directdisk image that you can just dd to a USB stick.
>>>>>
>>>>> Of course I meant to say .hddimg, not .directdisk.
>>>>
>>>> Thanks, I'll give that a try.
>>>>
>>>> What if I needed to boot from an actual CD?  I have an old
>>>> box here I'd like to try, but it doesn't boot from USB.
>>>
>>> We can produce ISO images but I don't think that they work quite as well,
>>> e.g.:
>>>
>>> https://bugzilla.yoctoproject.org/show_bug.cgi?id=5282
>>>
>>> You could always try it though.
>>
>> Bummer, when I tried to build core-image-minimal and/or core-image-x11, it
> failed:
>> | DEBUG: Executing shell function read_only_rootfs_hook
>> | sed: can't read
>> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
>> | -minimal-initramfs/1.0-r0/rootfs/etc/fstab: No such file or directory
>> | WARNING:
>> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
>> | -minimal-initramfs/1.0-r0/temp/run.read_only_rootfs_hook.30446:1 exit 2
>> | from|
>> |   sed -i -e
>> |   '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]
>> |   \)\([[:space:]]*\)[[:digit:]]$/\1\20/}'
>> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
>> nimal-initramfs/1.0-r0/rootfs/etc/fstab
>> | DEBUG: Python function do_rootfs finished
>> | ERROR: Function failed: read_only_rootfs_hook (log file is located at
>>
>> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
>> nimal-initramfs/1.0-r0/temp/log.do_rootfs.30446)
>>
>> Using these settings:
>> Build Configuration:
>> BB_VERSION        = "1.23.1"
>> BUILD_SYS         = "i686-linux"
>> NATIVELSBSTRING   = "Fedora-13"
>> TARGET_SYS        = "i586-poky-linux"
>> MACHINE           = "genericx86"
>> DISTRO            = "poky"
>> DISTRO_VERSION    = "1.6+snapshot-20140605"
>> TUNE_FEATURES     = "m32 core2"
>> TARGET_FPU        = ""
>> meta
>> meta-yocto
>> meta-yocto-bsp    = "master:e7114046be6e71fb326477dc882adb814ef6a751"
>>
>> Extra settings in conf/local.conf
>> # Live CD setup
>> IMAGE_FSTYPES_append = " hddimg live"
>
> "hddimg" isn't a valid IMAGE_FSTYPES item.
>
> Also, try IMAGE_FSTYPES += rather than _append, that allows the initramfs
> image to have its own value (because it's not really valid to make a live
> initramfs...)

Sorry, I misread/misapplied your previous suggestions.

>
>> IMAGE_FEATURES_append = " read-only-rootfs"
>
> Try EXTRA_IMAGE_FEATURES += instead of IMAGE_FEATURES_append

I've changed both of these and it still fails if I enable the
read-only-rootfs.

If I leave that option out, I can build an .hddimg which I dd'd
to my USB stick.  It tried to boot, finds /vmlinuz but fails to
find /initrd

My local.conf settings are now:
# Live CD setup
IMAGE_FSTYPES += " live"
#IMAGE_FEATURES += " read-only-rootfs"
CORE_IMAGE_EXTRA_INSTALL += " python-core python-modules"

Finally, during one of my builds, I ended up with a core-image-minimal*.iso
I tried burning this to a CD an it booted up, albeit with a couple of
complaints about a read-only rootfs.  Sadly, I no longer get any .iso
results when I 'bitbake core-image-minimal'

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: Live images?

[Gary Thomas]

On 2014-06-05 13:10, Gary Thomas wrote:
> On 2014-06-05 11:24, Paul Eggleton wrote:
>> On Thursday 05 June 2014 11:16:55 Gary Thomas wrote:
>>> On 2014-06-05 09:07, Paul Eggleton wrote:
>>>> On Thursday 05 June 2014 08:41:57 Gary Thomas wrote:
>>>>> On 2014-06-05 08:32, Paul Eggleton wrote:
>>>>>> On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
>>>>>>> Hi Gary,
>>>>>>>
>>>>>>> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
>>>>>>>> Looking through the Poky/Yocto sources, there seems to be
>>>>>>>> some support for Live CD/USB images.  However, I can't find
>>>>>>>> any examples nor documentation for how to use this.
>>>>>>>>
>>>>>>>> Can anyone provide some pointers?
>>>>>>>
>>>>>>> You're right, we seem to be missing that in our documentation; I'm not
>>>>>>> sure
>>>>>>> where the best place to document it would be though.
>>>>>>>
>>>>>>> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then
>>>>>>> you
>>>>>>> should get a .directdisk image that you can just dd to a USB stick.
>>>>>>
>>>>>> Of course I meant to say .hddimg, not .directdisk.
>>>>>
>>>>> Thanks, I'll give that a try.
>>>>>
>>>>> What if I needed to boot from an actual CD?  I have an old
>>>>> box here I'd like to try, but it doesn't boot from USB.
>>>>
>>>> We can produce ISO images but I don't think that they work quite as well,
>>>> e.g.:
>>>>
>>>> https://bugzilla.yoctoproject.org/show_bug.cgi?id=5282
>>>>
>>>> You could always try it though.
>>>
>>> Bummer, when I tried to build core-image-minimal and/or core-image-x11, it
>> failed:
>>> | DEBUG: Executing shell function read_only_rootfs_hook
>>> | sed: can't read
>>> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
>>> | -minimal-initramfs/1.0-r0/rootfs/etc/fstab: No such file or directory
>>> | WARNING:
>>> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
>>> | -minimal-initramfs/1.0-r0/temp/run.read_only_rootfs_hook.30446:1 exit 2
>>> | from|
>>> |   sed -i -e
>>> |   '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]
>>> |   \)\([[:space:]]*\)[[:digit:]]$/\1\20/}'
>>> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
>>> nimal-initramfs/1.0-r0/rootfs/etc/fstab
>>> | DEBUG: Python function do_rootfs finished
>>> | ERROR: Function failed: read_only_rootfs_hook (log file is located at
>>>
>>> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
>>> nimal-initramfs/1.0-r0/temp/log.do_rootfs.30446)
>>>
>>> Using these settings:
>>> Build Configuration:
>>> BB_VERSION        = "1.23.1"
>>> BUILD_SYS         = "i686-linux"
>>> NATIVELSBSTRING   = "Fedora-13"
>>> TARGET_SYS        = "i586-poky-linux"
>>> MACHINE           = "genericx86"
>>> DISTRO            = "poky"
>>> DISTRO_VERSION    = "1.6+snapshot-20140605"
>>> TUNE_FEATURES     = "m32 core2"
>>> TARGET_FPU        = ""
>>> meta
>>> meta-yocto
>>> meta-yocto-bsp    = "master:e7114046be6e71fb326477dc882adb814ef6a751"
>>>
>>> Extra settings in conf/local.conf
>>> # Live CD setup
>>> IMAGE_FSTYPES_append = " hddimg live"
>>
>> "hddimg" isn't a valid IMAGE_FSTYPES item.
>>
>> Also, try IMAGE_FSTYPES += rather than _append, that allows the initramfs
>> image to have its own value (because it's not really valid to make a live
>> initramfs...)
>
> Sorry, I misread/misapplied your previous suggestions.
>
>>
>>> IMAGE_FEATURES_append = " read-only-rootfs"
>>
>> Try EXTRA_IMAGE_FEATURES += instead of IMAGE_FEATURES_append
>
> I've changed both of these and it still fails if I enable the
> read-only-rootfs.
>
> If I leave that option out, I can build an .hddimg which I dd'd
> to my USB stick.  It tried to boot, finds /vmlinuz but fails to
> find /initrd
>
> My local.conf settings are now:
> # Live CD setup
> IMAGE_FSTYPES += " live"
> #IMAGE_FEATURES += " read-only-rootfs"
> CORE_IMAGE_EXTRA_INSTALL += " python-core python-modules"
>
> Finally, during one of my builds, I ended up with a core-image-minimal*.iso
> I tried burning this to a CD an it booted up, albeit with a couple of
> complaints about a read-only rootfs.  Sadly, I no longer get any .iso
> results when I 'bitbake core-image-minimal'
>

BTW, I tried this with daisy and the CD version (read-only)
worked just fine for me - the ISO and .hddimg files built with
no errors.

I'm bisecting now to see what broke...

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: Live images?

[Gary Thomas]

On 2014-06-05 16:08, Gary Thomas wrote:
> On 2014-06-05 13:10, Gary Thomas wrote:
>> On 2014-06-05 11:24, Paul Eggleton wrote:
>>> On Thursday 05 June 2014 11:16:55 Gary Thomas wrote:
>>>> On 2014-06-05 09:07, Paul Eggleton wrote:
>>>>> On Thursday 05 June 2014 08:41:57 Gary Thomas wrote:
>>>>>> On 2014-06-05 08:32, Paul Eggleton wrote:
>>>>>>> On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
>>>>>>>> Hi Gary,
>>>>>>>>
>>>>>>>> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
>>>>>>>>> Looking through the Poky/Yocto sources, there seems to be
>>>>>>>>> some support for Live CD/USB images.  However, I can't find
>>>>>>>>> any examples nor documentation for how to use this.
>>>>>>>>>
>>>>>>>>> Can anyone provide some pointers?
>>>>>>>>
>>>>>>>> You're right, we seem to be missing that in our documentation; I'm not
>>>>>>>> sure
>>>>>>>> where the best place to document it would be though.
>>>>>>>>
>>>>>>>> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then
>>>>>>>> you
>>>>>>>> should get a .directdisk image that you can just dd to a USB stick.
>>>>>>>
>>>>>>> Of course I meant to say .hddimg, not .directdisk.
>>>>>>
>>>>>> Thanks, I'll give that a try.
>>>>>>
>>>>>> What if I needed to boot from an actual CD?  I have an old
>>>>>> box here I'd like to try, but it doesn't boot from USB.
>>>>>
>>>>> We can produce ISO images but I don't think that they work quite as well,
>>>>> e.g.:
>>>>>
>>>>> https://bugzilla.yoctoproject.org/show_bug.cgi?id=5282
>>>>>
>>>>> You could always try it though.
>>>>
>>>> Bummer, when I tried to build core-image-minimal and/or core-image-x11, it
>>> failed:
>>>> | DEBUG: Executing shell function read_only_rootfs_hook
>>>> | sed: can't read
>>>> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
>>>> | -minimal-initramfs/1.0-r0/rootfs/etc/fstab: No such file or directory
>>>> | WARNING:
>>>> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
>>>> | -minimal-initramfs/1.0-r0/temp/run.read_only_rootfs_hook.30446:1 exit 2
>>>> | from|
>>>> |   sed -i -e
>>>> |   '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]
>>>> |   \)\([[:space:]]*\)[[:digit:]]$/\1\20/}'
>>>> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
>>>> nimal-initramfs/1.0-r0/rootfs/etc/fstab
>>>> | DEBUG: Python function do_rootfs finished
>>>> | ERROR: Function failed: read_only_rootfs_hook (log file is located at
>>>>
>>>> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image-mi
>>>> nimal-initramfs/1.0-r0/temp/log.do_rootfs.30446)
>>>>
>>>> Using these settings:
>>>> Build Configuration:
>>>> BB_VERSION        = "1.23.1"
>>>> BUILD_SYS         = "i686-linux"
>>>> NATIVELSBSTRING   = "Fedora-13"
>>>> TARGET_SYS        = "i586-poky-linux"
>>>> MACHINE           = "genericx86"
>>>> DISTRO            = "poky"
>>>> DISTRO_VERSION    = "1.6+snapshot-20140605"
>>>> TUNE_FEATURES     = "m32 core2"
>>>> TARGET_FPU        = ""
>>>> meta
>>>> meta-yocto
>>>> meta-yocto-bsp    = "master:e7114046be6e71fb326477dc882adb814ef6a751"
>>>>
>>>> Extra settings in conf/local.conf
>>>> # Live CD setup
>>>> IMAGE_FSTYPES_append = " hddimg live"
>>>
>>> "hddimg" isn't a valid IMAGE_FSTYPES item.
>>>
>>> Also, try IMAGE_FSTYPES += rather than _append, that allows the initramfs
>>> image to have its own value (because it's not really valid to make a live
>>> initramfs...)
>>
>> Sorry, I misread/misapplied your previous suggestions.
>>
>>>
>>>> IMAGE_FEATURES_append = " read-only-rootfs"
>>>
>>> Try EXTRA_IMAGE_FEATURES += instead of IMAGE_FEATURES_append
>>
>> I've changed both of these and it still fails if I enable the
>> read-only-rootfs.
>>
>> If I leave that option out, I can build an .hddimg which I dd'd
>> to my USB stick.  It tried to boot, finds /vmlinuz but fails to
>> find /initrd
>>
>> My local.conf settings are now:
>> # Live CD setup
>> IMAGE_FSTYPES += " live"
>> #IMAGE_FEATURES += " read-only-rootfs"
>> CORE_IMAGE_EXTRA_INSTALL += " python-core python-modules"
>>
>> Finally, during one of my builds, I ended up with a core-image-minimal*.iso
>> I tried burning this to a CD an it booted up, albeit with a couple of
>> complaints about a read-only rootfs.  Sadly, I no longer get any .iso
>> results when I 'bitbake core-image-minimal'
>>
>
> BTW, I tried this with daisy and the CD version (read-only)
> worked just fine for me - the ISO and .hddimg files built with
> no errors.
>
> I'm bisecting now to see what broke...
>

Truly odd.  After doing around a dozen bisected builds (some of
which were pretty messed up), all in the same tree as the original,
I could not reproduce the problem.  So, I tried 100% from scratch,
with the proper settings as above, including the read-only-rootfs,
and it builds & works perfectly(*), both on CD and USB.

Not that I want to find the answer to this, but somehow when I
tried the builds with my errant settings (from early on above),
my build got so messed up that the errors persisted, even when
I fixed the configuration settings.  I thought that it should
be more robust than this.  Is this something I should pursue,
or just treat it as "Doctor, Doctor, it hurts when I ..." and
be happy that it works if you start afresh (which sadly takes
at least 90 minutes on my pretty-fast build server)?

(*) Not a lot was tested and I only used core-image-minimal
which served my needs (to build a stand-alone CD/USB setup
to hand a QA tech).  I did see some complaints about the
read-only file system (e.g. can't save the timestamp on reboot),
but overall worked OK and good enough for this task.

Thanks for the time and sorry for the noise.  Looking forward
to some documentation on this showing up in the future :-)

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: Live images?

[Paul Eggleton]

Hi Gary,

On Thursday 05 June 2014 13:10:00 Gary Thomas wrote:
> On 2014-06-05 11:24, Paul Eggleton wrote:
> > On Thursday 05 June 2014 11:16:55 Gary Thomas wrote:
> >> On 2014-06-05 09:07, Paul Eggleton wrote:
> >>> On Thursday 05 June 2014 08:41:57 Gary Thomas wrote:
> >>>> On 2014-06-05 08:32, Paul Eggleton wrote:
> >>>>> On Thursday 05 June 2014 15:26:28 Paul Eggleton wrote:
> >>>>>> On Thursday 05 June 2014 07:07:34 Gary Thomas wrote:
> >>>>>>> Looking through the Poky/Yocto sources, there seems to be
> >>>>>>> some support for Live CD/USB images.  However, I can't find
> >>>>>>> any examples nor documentation for how to use this.
> >>>>>>> 
> >>>>>>> Can anyone provide some pointers?
> >>>>>> 
> >>>>>> You're right, we seem to be missing that in our documentation; I'm
> >>>>>> not sure where the best place to document it would be though.
> >>>>>> 
> >>>>>> FYI, you should just need to ensure "live" is in IMAGE_FSTYPES; then
> >>>>>> you should get a .directdisk image that you can just dd to a USB
> >>>>>> stick.
> >>>>> 
> >>>>> Of course I meant to say .hddimg, not .directdisk.
> >>>> 
> >>>> Thanks, I'll give that a try.
> >>>> 
> >>>> What if I needed to boot from an actual CD?  I have an old
> >>>> box here I'd like to try, but it doesn't boot from USB.
> >>> 
> >>> We can produce ISO images but I don't think that they work quite as
> >>> well, e.g.:
> >>> 
> >>> https://bugzilla.yoctoproject.org/show_bug.cgi?id=5282
> >>> 
> >>> You could always try it though.
> >> 
> >> Bummer, when I tried to build core-image-minimal and/or core-image-x11,
> >> it failed:
> >> | DEBUG: Executing shell function read_only_rootfs_hook
> >> | sed: can't read
> >> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-ima
> >> | ge
> >> | -minimal-initramfs/1.0-r0/rootfs/etc/fstab: No such file or directory
> >> | WARNING:
> >> | /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-ima
> >> | ge
> >> | -minimal-initramfs/1.0-r0/temp/run.read_only_rootfs_hook.30446:1 exit 2
> >> | from|
> >> | 
> >> |   sed -i -e
> >> |   '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:
> >> |   ]]
> >> |   \)\([[:space:]]*\)[[:digit:]]$/\1\20/}'
> >> 
> >> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
> >> -mi nimal-initramfs/1.0-r0/rootfs/etc/fstab
> >> 
> >> | DEBUG: Python function do_rootfs finished
> >> | ERROR: Function failed: read_only_rootfs_hook (log file is located at
> >> 
> >> /home/local/x86_live_2014-06-05/tmp/work/genericx86-poky-linux/core-image
> >> -mi nimal-initramfs/1.0-r0/temp/log.do_rootfs.30446)
> >> 
> >> Using these settings:
> >> Build Configuration:
> >> BB_VERSION        = "1.23.1"
> >> BUILD_SYS         = "i686-linux"
> >> NATIVELSBSTRING   = "Fedora-13"
> >> TARGET_SYS        = "i586-poky-linux"
> >> MACHINE           = "genericx86"
> >> DISTRO            = "poky"
> >> DISTRO_VERSION    = "1.6+snapshot-20140605"
> >> TUNE_FEATURES     = "m32 core2"
> >> TARGET_FPU        = ""
> >> meta
> >> meta-yocto
> >> meta-yocto-bsp    = "master:e7114046be6e71fb326477dc882adb814ef6a751"
> >> 
> >> Extra settings in conf/local.conf
> >> # Live CD setup
> >> IMAGE_FSTYPES_append = " hddimg live"
> > 
> > "hddimg" isn't a valid IMAGE_FSTYPES item.
> > 
> > Also, try IMAGE_FSTYPES += rather than _append, that allows the initramfs
> > image to have its own value (because it's not really valid to make a live
> > initramfs...)
> 
> Sorry, I misread/misapplied your previous suggestions.
> 
> >> IMAGE_FEATURES_append = " read-only-rootfs"
> > 
> > Try EXTRA_IMAGE_FEATURES += instead of IMAGE_FEATURES_append
> 
> I've changed both of these and it still fails if I enable the
> read-only-rootfs.
> 
> If I leave that option out, I can build an .hddimg which I dd'd
> to my USB stick.  It tried to boot, finds /vmlinuz but fails to
> find /initrd
> 
> My local.conf settings are now:
> # Live CD setup
> IMAGE_FSTYPES += " live"
> #IMAGE_FEATURES += " read-only-rootfs"
> CORE_IMAGE_EXTRA_INSTALL += " python-core python-modules"
> 
> Finally, during one of my builds, I ended up with a core-image-minimal*.iso
> I tried burning this to a CD an it booted up, albeit with a couple of
> complaints about a read-only rootfs.  Sadly, I no longer get any .iso
> results when I 'bitbake core-image-minimal'

As far as I know you should get a .iso with live in IMAGE_FSTYPES, unless you 
set NOISO = "1". If you're not getting that or seeing other unexpected 
behaviour I think the best course of action would be to file a bug, and we'll 
try to track down the cause of the issue.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre