Installation of Fedora 26 for s390x stoped on warning on LPAR with RoCE enabled

[Fu Long LL Wang]

Hi Gurus,


Recently, i'm setting a linux on z env for a function testing, the lpar has
RoCE interface enabled.
And i choose Fedora 26 for s390x as the OS, cause some rpm packages only
exists on this distribution now.


Below are some screen shots when i load the installation media on the lpar.
the complete load log is also attached on the end of this mail.

pls help to see what is the reason behind and how can i avoid it at your
convenience!!!

Many Thanks!

























(See attached file: Export as HTML_lpar.htm)






                                                                            
 Best Regards                                                               
                                                                            
                                                                            
 Fulong Wang                                                                
 System z Technical Engagement – RDBMS, NoSQL, MiddleWare & App on          
 LinuxONE, z Brand Team                                                     
                                                                            
                                                                            
 __________________________________________________________________________ 
 _____________________________________                                      
                                                                            
 Tel: [phone] | Mobile: [phone] | E-mail:                   
 fulong.wang(a)cn.ibm.com                                                     
 Add: No.28 Ring Building, ZhongGuanCun Software Park, HaiDian District,    
 Beijing, 100193, PRC

[Steffen Maier]

On 08/17/2017 05:25 AM, Fu Long LL Wang wrote:
>  Recently, i'm setting a linux on z env for a function testing,
> the lpar has
>  RoCE interface enabled.
>  And i choose Fedora 26 for s390x as the OS, cause some rpm packages only
>  exists on this distribution now.
>  
>  
>  Below are some screen shots when i load the installation media on the lpar.
>  the complete load log is also attached on the end of this mail. 
>  (See attached file: Export as HTML_lpar.htm) 
Excellent debug data!

>  inst.repo=ftp://atsftp:zatsftp@172.16.27.98/zlinux/Fedora26
> rd.znet=qeth,0.0.300
>  00,0.0.3001,0.0.3002,layer2=0,portno=0 ip=172.16.27.52::172.16.27.1:24:fedroce01 
It did not seem to matter but it looks like the 1st device bus-ID of the 
network ccwgroup triplet is 0.0.30000 instead of 0.0.3000, i.e. one 
trailing zero too many?

>  1:enccw0.0.3000:none rd.dasd=0.0.7913 
https://fedoraproject.org/wiki/Architectures/s390x/24#Release_Notes

Meanwhile the predictable network interface names

https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInter...
https://github.com/systemd/systemd/blob/43ee6a8128dc751943e25c42a490a8339...

changed upstream with

https://github.com/systemd/systemd/commit/0037a669ac9a2bbedccdb2f48311135...

You can also see this in the kernel messages later on:

>  [   46.232043] qeth 0.0.3000 enc3000: renamed from eth0 
So I would try with

ip=172.16.27.52::172.16.27.1:24:fedroce011:enc3000:none

instead of

ip=172.16.27.52::172.16.27.1:24:fedroce011:enccw0.0.3000:none

Without the network it cannot access inst.repo and thus does not find 
the new initrd containing the installer.

>  Warning: /dev/root does not exist 


-- 
Mit freundlichen Grüßen / Kind regards
Steffen Maier

Linux on z Systems Development

IBM Deutschland Research & Development GmbH
Vorsitzende des Aufsichtsrats: Martina Koederitz
Geschaeftsfuehrung: Dirk Wittkopp
Sitz der Gesellschaft: Boeblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294

[Dan Horák]

On Thu, 17 Aug 2017 12:14:27 +0200
Steffen Maier <maier(a)linux.vnet.ibm.com&gt; wrote:

>  
>  On 08/17/2017 05:25 AM, Fu Long LL Wang wrote:
>  > Recently, i'm setting a linux on z env for a function testing, the
>  > lpar has RoCE interface enabled.
>  > And i choose Fedora 26 for s390x as the OS, cause some rpm packages
>  > only exists on this distribution now.
>  > 
>  > 
>  > Below are some screen shots when i load the installation media on
>  > the lpar. the complete load log is also attached on the end of this
>  > mail.
>  
>  > (See attached file: Export as HTML_lpar.htm)
>  
>  Excellent debug data!
>  
>  > inst.repo=ftp://atsftp:zatsftp@172.16.27.98/zlinux/Fedora26
>  > rd.znet=qeth,0.0.300 00,0.0.3001,0.0.3002,layer2=0,portno=0
>  > ip=172.16.27.52::172.16.27.1:24:fedroce01
>  
>  It did not seem to matter but it looks like the 1st device bus-ID of
>  the network ccwgroup triplet is 0.0.30000 instead of 0.0.3000, i.e.
>  one trailing zero too many?
>  
>  > 1:enccw0.0.3000:none rd.dasd=0.0.7913
>  
>  https://fedoraproject.org/wiki/Architectures/s390x/24#Release_Notes
>  
>  Meanwhile the predictable network interface names
>  
>  https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInter...
>
> https://github.com/systemd/systemd/blob/43ee6a8128dc751943e25c42a490a8339...
>  
>  changed upstream with
>  
>  https://github.com/systemd/systemd/commit/0037a669ac9a2bbedccdb2f48311135...
>  
>  You can also see this in the kernel messages later on:
>  
>  > [   46.232043] qeth 0.0.3000 enc3000: renamed from eth0
>  
>  So I would try with
>  
>  ip=172.16.27.52::172.16.27.1:24:fedroce011:enc3000:none
>  
>  instead of
>  
>  ip=172.16.27.52::172.16.27.1:24:fedroce011:enccw0.0.3000:none
>  
>  Without the network it cannot access inst.repo and thus does not find 
>  the new initrd containing the installer.
>  
>  > Warning: /dev/root does not exist 
I agree with Steffen, this ^^ message means "we can't transfer the
install.img file over the network", so reviewing and verifying network
connectivity should be the next step.


		Dan

[Fu Long LL Wang]

Hi Steffen and Dan,


Great Thanks for your kindly help and poiniting me out the apparent issues!


I used to edit the kernel command line parameters with Notepadd++.
The first line started with "inst.repo" below is the one i used for the
first try with fedora. The second line in highlight started with
"inst.repo" is the one just used today.
I also tried to rewrite the parameters in a new empty text file.
In either case, the trailing zero will be generated, still don't know why.

But the change on interface name did have effects and did the trick for
me! :)








(See attached file: Export as HTML_lpar_v1.htm)















                                                                            
 Best Regards                                                               
                                                                            
                                                                            
 Fulong Wang                                                                
 System z Technical Engagement – RDBMS, NoSQL, MiddleWare & App on          
 LinuxONE, z Brand Team                                                     
                                                                            
                                                                            
 __________________________________________________________________________ 
 _____________________________________                                      
                                                                            
 Tel: [phone] | Mobile: [phone] | E-mail:                   
 fulong.wang(a)cn.ibm.com                                                     
 Add: No.28 Ring Building, ZhongGuanCun Software Park, HaiDian District,    
 Beijing, 100193, PRC                                                       
                                                                            








From:	Dan Horák <dan(a)danny.cz
>  
To:	s390x(a)lists.fedoraproject.org
Date:	2017/08/18 00:10
Subject:	Re: Installation of Fedora 26 for s390x stoped on warning on
            LPAR with RoCE enabled



On Thu, 17 Aug 2017 12:14:27 +0200

Steffen Maier <maier(a)linux.vnet.ibm.com&gt; wrote:



>  
>  On 08/17/2017 05:25 AM, Fu Long LL Wang wrote:
>  
>  > Recently, i'm setting a linux on z env for a function
> testing, the
>  
>  > lpar has RoCE interface enabled.
>  
>  > And i choose Fedora 26 for s390x as the OS, cause some rpm
> packages
>  
>  > only exists on this distribution now.
>  
>
>  
>
>  
>  > Below are some screen shots when i load the installation media
> on
>  
>  > the lpar. the complete load log is also attached on the end of
> this
>  
>  > mail.
>  
>  
>  > (See attached file: Export as HTML_lpar.htm)
>  
>  
>  Excellent debug data!
>  
>  
>
>
inst.repo=https://urldefense.proofpoint.com/v2/url?u=ftp-3A__atsftp-3Azat...


>  > rd.znet=qeth,0.0.300 00,0.0.3001,0.0.3002,layer2=0,portno=0
>  
>  > ip=172.16.27.52::172.16.27.1:24:fedroce01
>  
>  
>  It did not seem to matter but it looks like the 1st device bus-ID of
>  
>  the network ccwgroup triplet is 0.0.30000 instead of 0.0.3000, i.e.
>  
>  one trailing zero too many?
>  
>  
>  > 1:enccw0.0.3000:none rd.dasd=0.0.7913
>  
>  
>
https://urldefense.proofpoint.com/v2/url?u=https-3A__fedoraproject.org_wi...


>  
>  Meanwhile the predictable network interface names
>  
>  
>
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.freedesktop.org_...


>
https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_systemd_s...


>  
>  changed upstream with
>  
>  
>
https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_systemd_s...


>  
>  You can also see this in the kernel messages later on:
>  
>  
>  > [   46.232043] qeth 0.0.3000 enc3000: renamed from eth0
>  
>  
>  So I would try with
>  
>  
>  ip=172.16.27.52::172.16.27.1:24:fedroce011:enc3000:none
>  
>  
>  instead of
>  
>  
>  ip=172.16.27.52::172.16.27.1:24:fedroce011:enccw0.0.3000:none
>  
>  
>  Without the network it cannot access inst.repo and thus does not
> find
>  
>  the new initrd containing the installer.
>  
>  
>  > Warning: /dev/root does not exist
>  


I agree with Steffen, this ^^ message means "we can't transfer the

install.img file over the network", so reviewing and verifying network

connectivity should be the next step.





		 		 Dan
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