support for stateful re-exec of upstart, now available for testing

[James Hunt]

On 04/09/12 19:19, James Hunt wrote:
> On 03/09/12 09:13, Steve Langasek wrote:
>> Hi all,
>>
>> Thanks to some great work by James, there is now a test branch of upstart
>> available that supports passing its state when re-execing - rather important
>> when re-execing an init that does process supervising!
>>
>> You can find the code here:
>>
>>   https://code.launchpad.net/~upstart-devel/upstart/stateful-reexec
>>
>> Once landed, this will enable important functionality such as applying
>> security updates without rebooting, being able to run upstart in an
>> initramfs and pass state to the rootfs, and so on.  In the meantime, feel
>> free to try the branch out and provide feedback on any issues you find.
>>
>> You will need libjson-c 0.10 or later (available in Ubuntu quantal and
>> Debian sid) to build this branch.  I believe James is planning to set up a
>> launchpad recipe build for the branch as well, which I'm sure he will post
>> once it's available.
> I have now created a recipe, but it is generating a test failure. Whilst
> I investigate, I've created an Ubuntu Quantal package (which passes all
> tests) available in my upstart-testing PPA:
> 
>     https://launchpad.net/~jamesodhunt/+archive/upstart-testing
>     (Please read the warning at the top of this page!)
> 
> Latest version is: upstart '1.5-0ubuntu9~jh20120904c'.
> 
> The specification can be found here:
> 
> 
> https://wiki.ubuntu.com/FoundationsTeam/Specs/QuantalUpstartStatefulReexec
> 
> Please also read the limitations section (which should start to dwindle
> over the coming days/weeks) carefully:
> 
> 
> https://wiki.ubuntu.com/FoundationsTeam/Spec/QuantalUpstartStatefulReexec#Phase_1_Limitations
> 
> To actually trigger a re-exec, run:
> 
>     sudo telinit u
> 
> Finally, if you discover any bugs, please report them here:
> 
>     https://bugs.launchpad.net/upstart/+filebug
> 
We've made a lot of changes to this branch recently, all of which are
now also available in the upstart-testing PPA mentioned above.

Latest version is: upstart '1.5-0ubuntu9~jh20120913'.

Feedback most welcome.

Kind regards,

James.
--
James Hunt
____________________________________
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