No change after changing to IP address of MN and reran makedns.


-SS-

From: Casandra H Qiu <cxh...@us.ibm.com>
Sent: Friday, July 31, 2020 2:31 PM
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Subject: Re: [xcat-user] Erroneous DNS entry creation

EXTERNAL SENDER


you should use MN's ip address.


...................................................................
Casandra Hong Qiu
Phone: (845) 433-9291, t/l 293-9291
Office: Building 8, 3-B-04
cxh...@us.ibm.com<mailto:cxh...@us.ibm.com>



[Inactive hide details for Sajesh Singh ---07/31/2020 02:13:22 PM---Tried 
removing the 2 external DNS servers and reran makedns,]Sajesh Singh 
---07/31/2020 02:13:22 PM---Tried removing the 2 external DNS servers and reran 
makedns, but the 169 entry still shows up. I use

From: Sajesh Singh <ssi...@amnh.org<mailto:ssi...@amnh.org>>
To: xCAT Users Mailing list 
<xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>>
Date: 07/31/2020 02:13 PM
Subject: [EXTERNAL] Re: [xcat-user] Erroneous DNS entry creation

________________________________



Tried removing the 2 external DNS servers and reran makedns, but the 169 entry 
still shows up. I use 127.0.0.1 as the IP address for the local nameserver.

-SS-


From: Casandra H Qiu <cxh...@us.ibm.com<mailto:cxh...@us.ibm.com>>
Sent: Friday, July 31, 2020 1:46 PM
To: xCAT Users Mailing list 
<xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>>
Subject: Re: [xcat-user] Erroneous DNS entry creation

EXTERNAL SENDER

can u able to get rid of 2 external namservers? if not, put your local name 
server before external nameserver. I assume you local name nameserver is xCAT 
MN's ip address



...................................................................
Casandra Hong Qiu
Phone: (845) 433-9291, t/l 293-9291
Office: Building 8, 3-B-04
cxh...@us.ibm.com<mailto:cxh...@us.ibm.com>



[Inactive hide details for Sajesh Singh ---07/31/2020 01:30:19 PM---There is no 
169 entry in my /etc/resolv.conf or my /etc/host]Sajesh Singh ---07/31/2020 
01:30:19 PM---There is no 169 entry in my /etc/resolv.conf or my /etc/hosts. 
The only entries in /etc/resolv.conf

From: Sajesh Singh <ssi...@amnh.org<mailto:ssi...@amnh.org>>
To: xCAT Users Mailing list 
<xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>>
Date: 07/31/2020 01:30 PM
Subject: [EXTERNAL] Re: [xcat-user] Erroneous DNS entry creation

________________________________




There is no 169 entry in my /etc/resolv.conf or my /etc/hosts. The only entries 
in /etc/resolv.conf are for my local name server and my 2 external nameservers.

Thank you,

SS

From: Casandra H Qiu <cxh...@us.ibm.com<mailto:cxh...@us.ibm.com>>
Sent: Friday, July 31, 2020 1:11 PM
To: xCAT Users Mailing list 
<xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>>
Subject: Re: [xcat-user] Erroneous DNS entry creation

EXTERNAL SENDER

check your /etc/resolv.conf, you can get rid of 169 ip address and use head's 
ip address, then run makedns again.



Thanks,
Casandra Qiu

...................................................................
Casandra Hong Qiu
Phone: (845) 433-9291, t/l 293-9291
Office: Building 8, 3-B-04
cxh...@us.ibm.com<mailto:cxh...@us.ibm.com>



[Inactive hide details for Sajesh Singh ---07/31/2020 12:39:43 PM---Cassandra,  
 It's not for one of the compute nodes. The entr]Sajesh Singh ---07/31/2020 
12:39:43 PM---Cassandra, It's not for one of the compute nodes. The entry is 
related to the head node.

From: Sajesh Singh <ssi...@amnh.org<mailto:ssi...@amnh.org>>
To: xCAT Users Mailing list 
<xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>>
Date: 07/31/2020 12:39 PM
Subject: [EXTERNAL] Re: [xcat-user] Erroneous DNS entry creation

________________________________





Cassandra,
It’s not for one of the compute nodes. The entry is related to the head node.


Output of grep from /etc/hosts for node head

192.168.243.254 head-bmc
192.168.247.254 head
10.224.15.254 head-ib
=========================================================
Table dump of networks
#netname,net,mask,mgtifname,gateway,dhcpserver,tftpserver,nameservers,ntpservers,logservers,dynamicrange,staticrange,staticrangeincrement,nodehostname,ddnsdomain,vlanid,domain,mtu,comments,disable
"infiniband","10.XXX.XXX.XXX","255.255.255.0","ib0","<xcatmaster>",,"<xcatmaster>",,,,,,,,,,,"65520",,
"public","216.XXX.XXX.XXX","255.255.255.192","eno3","216.XXX.XXX.XXX",,"<xcatmaster>",,,,,,,,,,,"1500",,
"boot","192.XXX.XXX.XXX","255.255.255.0","eno1","192.XXX.XXX.XXX",,"192.XXX.XXX.XXX",,,,,,,,,,,"1500",,
"fde1:53ba:e9a0:de11::/64","fde1:53ba:e9a0:de11::/64","/64","idrac",,,,,,,,,,,,,,,,
"ipmi","192.XXX.XXX.XXX","255.XXX.XXX.XXX","eno1:1","192.XXX.XXX.XXX",,,,,,,,,,,,,"1500",,

==========================================================

DNS lookup results

nslookup head
Server: 127.0.0.1
Address: 127.0.0.1#53

Name: head.cluster.fdqn
Address: 169.254.0.2
Name: head.cluster.fdqn
Address: 192.168.247.254


Thank you,

SS

From: Casandra H Qiu <cxh...@us.ibm.com<mailto:cxh...@us.ibm.com>>
Sent: Friday, July 31, 2020 11:27 AM
To: xCAT Users Mailing list 
<xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>>
Subject: Re: [xcat-user] Erroneous DNS entry creation

EXTERNAL SENDER

which entry? can you show us?
lsdef compute_node
tabdump networks
grep compute_node /etc/hosts


Thanks,
Casandra Qiu
...................................................................
Casandra Hong Qiu
Phone: (845) 433-9291, t/l 293-9291
Office: Building 8, 3-B-04
cxh...@us.ibm.com<mailto:cxh...@us.ibm.com>



[Inactive hide details for Sajesh Singh ---07/30/2020 04:32:53 PM---CentOS 8 
xCat 2.16]Sajesh Singh ---07/30/2020 04:32:53 PM---CentOS 8 xCat 2.16

From: Sajesh Singh <ssi...@amnh.org<mailto:ssi...@amnh.org>>
To: "xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>" 
<xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>>
Date: 07/30/2020 04:32 PM
Subject: [EXTERNAL] [xcat-user] Erroneous DNS entry creation

________________________________






CentOS 8
xCat 2.16

When running makedns there is an entry created for an entry that is not in my 
/etc/hosts. The effect of this is that the head node has 2 entries in the local 
DNS cache. One for its private IP address (in /etc/hosts) and one for the other 
address which is not reachable by the compute nodes. The other IP address is 
just used by the HW management utilities for internal communications and is a 
169.x.x.x address. How can I tell xCat/makedns to not create this entry?

-SS-_______________________________________________
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