Re: Install of Xen 4.8 on Fedora 25 makes the box unbootable.. which is due to /var/run/xen being created, instead of /run/xen

[Boris Ostrovsky <boris.ostrovsky@oracle.com>]

On 02/15/2017 03:51 PM, Konrad Rzeszutek Wilk wrote:
> Hey,
>
> Credit goes to Boris (CC-ed) for figuring out how to fix this.
>
> I was doing:
>
> ./configure --prefix=/usr --enable-systemd
> make -j8
> cd dist;./install.sh;)
> reboot
>
> and to my surprise it would hang on 
> Starting Terminate Plymouth Boot Screen"...                                                                
>                                                                                                                                 
> with a bunch of 'FAILED'.                                                                                                  
>
>
> What I hadn't realized is that Fedora has removed the
> /var/run and is now using /run. But the dist/install
> has the /var/run directory (dist/install/var/run/) in it -
> and that seems to make everything blow up as it erase
> the original symlink:
>
> [konrad@x230 /]$ ls -al /var/run
> lrwxrwxrwx. 1 root root 6 Oct  5 02:08 /var/run -> ../run
>
> with its own directory which has nothing to do with /run - and
> which only has 'xen' and 'xenstored' in it (albeit at bootup things
> do seem to be created there - but they are not in sync with things in 
> /run).
>
>
> The "Fix" is to boot with 'init=/bin/bash' on Linux command line and do:
>
> mount / -o remount,rw
> rm -rf /var/run
> mkdir /run/xen
> mkdir /run/xenstored
> ln -sf /run /var/run
>
> And then everything works again.
>
> A bit of light builds shows that RELEASE-4.7.0
> does not have an dist/install/var/run but
> RELEASE-4.8.0 and higher does.
>
> And I am not exactly sure which commit does this and
> how to go around to auto-detect this? 

I *think* this started happening after
  https://lists.xenproject.org/archives/html/xen-devel/2016-08/msg00372.html

-boris


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