HI,
Ok, you want to remove the gateway in rnetboot OF command, the current code
logic uses the gateway as a required attribute, if I remove the "gateway"
from networks table, rnetboot will complain with the following message:
No gateway defined for this node, check the networks table. If the gateway
in the networks table is '<xcatmaster>', check the ip forwarding setup on
the management node and service nodes.
I searched the code, found it is in /opt/xcat/lib/perl/xCAT/PPC.pm, I
commented out the "next;" line right after the message, restart xcatd, then
I could boot the node without gateway defined.
1019 } else {
1020 # If the <xcatmaster> is the gateway, the ip forwarding
must be enabled on the MN/SN,
1021 # xCAT will setup the ipforarding automatically, but
still see problems about the ip forwardin g occassionally.
1022 send_msg( $request, 1, "$_: No gateway defined for this
node, check the networks table. If the gateway in the networks
table is '<xcatmaster>', check the ip forwarding setup on the management
node and service nodes.");
1023 #next; ==========> comment out this line
1024 }
Could you please try this? If it works, I can work with the xCAT
development team to patch this into code. Thanks.
-------------------------------------------------------------------------
Li,Guang Cheng (李光成)
IBM China System Technology Laboratory
Tel: 86-10-82453499
Tie-Line: 9053499
Email: ligua...@cn.ibm.com
Address: Building 28, ZhongGuanCun Software Park,
No.8, Dong Bei Wang West Road, Haidian District Beijing 100193,
PRC
北京市海淀区东北旺西路8号中关村软件园28号楼
邮编: 100193
From: Douglas Myers <dgmy...@us.ibm.com>
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date: 2015/05/22 00:46
Subject: Re: [xcat-user] rnetboot issue in 2.9.1
Setting the return code to 1 (from $enabled) and restarting xCAT resulted
in same behavior, Thing is, I don't want ip forwarding nor a gateway,
neither are useful to me in this context, and if we remove teh gateway from
the OF paste that rnetboot does, things work fine...
Any way to disable the gateway being added to OF command?
_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"
Inactive hide details for Guang Cheng Li ---05/20/2015 11:05:52 PM---HI,
Guang Cheng Li ---05/20/2015 11:05:52 PM---HI,
From: Guang Cheng Li <ligua...@cn.ibm.com>
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date: 05/20/2015 11:05 PM
Subject: Re: [xcat-user] rnetboot issue in 2.9.1
HI,
Hmmm, setting the node's gateway to some machine without ip forwarding
sometimes will have problem, we did occasionally see os provisioning hang
problems if the ip forwarding is not enabled on the MN/SN, this is why the
ip forwarding is required, I am not exactly sure why, probably because the
compute nodes need some responses from the gateway to determine the
routing, but gateway without ip forwarding enabled does not respond these
requests. To override the ip forwarding check, you could modify the
subroutine ip_forwarding_enabled in /opt/xcat/lib/perl/xCAT/NetworkUtils.pm
to always return 1. Please let me know if it does not work.
-------------------------------------------------------------------------
Li,Guang Cheng (李光成)
IBM China System Technology Laboratory
Tel: 86-10-82453499
Tie-Line: 9053499
Email: ligua...@cn.ibm.com
Address: Building 28, ZhongGuanCun Software Park,
No.8, Dong Bei Wang West Road, Haidian District Beijing 100193, PRC
北京市海淀区东北旺西路8号中关村软件园28号楼
邮编: 100193
Inactive hide details for Douglas Myers ---2015/05/21 01:01:31---Same
issue, since I cannot turn on ip forwarding, bootp is notDouglas Myers
---2015/05/21 01:01:31---Same issue, since I cannot turn on ip forwarding,
bootp is not getting to proper SN...
From: Douglas Myers <dgmy...@us.ibm.com>
To: "xCAT Users Mailing list" <xcat-user@lists.sourceforge.net>
Date: 2015/05/21 01:01
Subject: Re: [xcat-user] rnetboot issue in 2.9.1
Same issue, since I cannot turn on ip forwarding, bootp is not getting to
proper SN...
_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"
Inactive hide details for Douglas Myers---05/19/2015 08:13:32 PM---I
haven't tried that, as it seems that would still cause a pDouglas
Myers---05/19/2015 08:13:32 PM---I haven't tried that, as it seems that
would still cause a problem with gw IP taking bootp packets,
From: Douglas Myers/Schaumburg/IBM
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date: 05/19/2015 08:13 PM
Subject: Re: [xcat-user] rnetboot issue in 2.9.1
I haven't tried that, as it seems that would still cause a problem with gw
IP taking bootp packets, but I can do so in my morning and report back...
_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"
Inactive hide details for Guang Cheng Li ---05/19/2015 08:05:55
PM---Douglas,Guang Cheng Li ---05/19/2015 08:05:55 PM---Douglas,
From: Guang Cheng Li <ligua...@cn.ibm.com>
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date: 05/19/2015 08:05 PM
Subject: Re: [xcat-user] rnetboot issue in 2.9.1
Douglas,
Have you tried to setup the networks.gateway to be the keyword
"<xcatmaster>"?
[root@c910f02c01p02 ~]# tabdump -d networks | grep gateway
gateway: The network gateway. It can be set to an ip address or the
keyword <xcatmaster>, the keyword <xcatmaster> indicates the cluster-facing
ip address configured on this management node or service node. Leaving this
field blank means that there is no gateway for this network.
[root@c910f02c01p02 ~]#
-------------------------------------------------------------------------
Li,Guang Cheng (李光成)
IBM China System Technology Laboratory
Tel: 86-10-82453499
Tie-Line: 9053499
Email: ligua...@cn.ibm.com
Address: Building 28, ZhongGuanCun Software Park,
No.8, Dong Bei Wang West Road, Haidian District Beijing 100193, PRC
北京市海淀区东北旺西路8号中关村软件园28号楼
邮编: 100193
Inactive hide details for Douglas Myers ---2015/05/20 08:23:43---SLES 11.3
x86_64 MS node ppc64 SNs We've upgraded a cluster frDouglas Myers
---2015/05/20 08:23:43---SLES 11.3 x86_64 MS node ppc64 SNs We've upgraded
a cluster from 2.7.8 to 2.9.1 and have run into a
From: Douglas Myers <dgmy...@us.ibm.com>
To: "xCAT Users Mailing list" <xcat-user@lists.sourceforge.net>
Date: 2015/05/20 08:23
Subject: [xcat-user] rnetboot issue in 2.9.1
SLES 11.3 x86_64 MS node ppc64 SNs
We've upgraded a cluster from 2.7.8 to 2.9.1 and have run into a problem.
When running rnetboot on a lpar it is writing out gateway IP to OF prompt.
This causes issue when we want a client to use a different SN, the OF of
the lpar attempts to bootp to gw (a known issue in the past). Using 2.7.8
either xCAT wasn't exhibiting the same behavior, two SNs in same network
could be used, we did not have errant bootp packets. So, with this upgrade
we have the following situation:
Two SNs on same network, one on .1 and one on .2 the network table has .1
as gw:
lpar that is assigned to .1 SN will bootp and get response fine from .1 and
install normally
lpar that is assigned ot .2 SN will attempt bootp to .1 (even though that
is only the gw assignation on OF prompt, server IP is .2 and OF reflects
that) and eventually fails.
If we flip gw in network table to .2 the reverse of those two outcomes
happens
If we remove gw from the OF command, installs happen to either SN as
directed with no issues (e.g. .1 SN clients bootp and install from .1
SN, .2 clients bootp and install from .2 SN. However removing gw from
network table results is rnetboot failing on no gw and lpar never reaching
bootp attempt. Note that we do not need a gw at all, it is a admin
network, no routing allowed.
_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"
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Performance metrics, stats and reports that give you Actionable Insights
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Performance metrics, stats and reports that give you Actionable Insights
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