As per https://www.ietf.org/rfc/rfc1034.txt , the hyphen is the only
non-alphanumeric character allowed in DNS names(`.` is a separator). In
fact, the default behaviour of xCAT is to use hyphenated names for all
secondary interfaces (see the /etc/hosts output in my previous mails).
On Thu, Jul 2, 2015 at 3:31 PM, Samveen ListReceipient <[email protected]
> wrote:
> My problem is not with the `host-name` field of the lease (which already
> matches the nodename anyway). I want the DDNS-hostname to be set to match
> the node definition in xcat (and what would be generated by makedns). I
> have trouble because the DHCPD incorrectly updates the hostname's A record
> in DDNS to point to the last issued lease instead of the lease for the
> primary interface (which DHCPD doesn't know about, and xCAT does).
>
> If for example a BMC reset happens, then the DNS A record for the host now
> points to the IPMI interface's IP.
>
> A good example is that the hostname resolution between /etc/hosts and the
> DNS server give different results:
>
> [root@xcatmn01 xcat_prep]# host xcatsn01 localhost
>
> Using domain server:
>
> Name: localhost
>
> Address: 127.0.0.1#53
>
> Aliases:
>
>
> xcatsn01.poc.lzd.co has address 10.2.72.11
>
> [root@xcatmn01 xcat_prep]# grep xcatsn01 /etc/hosts
>
> 10.4.0.10 xcatsn01 xcatsn01.poc.lzd.co xcatsn01-eth1
>
> 10.1.240.10 xcatsn01-m xcatsn01-m.poc.lzd.co
>
> 10.2.72.11 xcatsn01-s xcatsn01-s.poc.lzd.co
>
> In my setup, I depend on DHCPD to set the correct DNS names instead of
> using `makedns xcatsn01`, and current behaviour doesn't match expected
> behaviour.
>
> On Thu, Jul 2, 2015 at 12:52 PM, Xiao Peng Wang <[email protected]> wrote:
>
>> It will cause problem that your node name is different with the
>> hostname/ddns-name in the dhcp leases file. Are both the hostname
>> xcatsn01-s and xcatsn01 exist? You should try to figure out the possible
>> error in the dns resolution. And avoid using '-' in node name is a good
>> idea.
>>
>> Thanks
>> Best Regards
>> ----------------------------------------------------------------------
>> Wang Xiaopeng (王晓朋)
>> IBM China System Technology Laboratory
>> Tel: 86-10-82453455
>> Email: [email protected]
>> Address: 28,ZhongGuanCun Software Park,No.8 Dong Bei Wang West Road,
>> Haidian District Beijing P.R.China 100193
>>
>> [image: Inactive hide details for Samveen ListReceipient ---2015/07/01
>> 13:04:43---I forgot to add that for the interface bound to xcats]Samveen
>> ListReceipient ---2015/07/01 13:04:43---I forgot to add that for the
>> interface bound to xcatsn01-s, the complete network is the dynamic rang
>>
>> From: Samveen ListReceipient <[email protected]>
>> To: xCAT <[email protected]>
>> Date: 2015/07/01 13:04
>> Subject: Re: [xcat-user] Static assignment of IPs
>> ------------------------------
>>
>>
>>
>> I forgot to add that for the interface bound to xcatsn01-s, the complete
>> network is the dynamic range:
>>
>> [root@xcatmn01 xcat_prep]# lsdef -t network PROVISIONING-SVC -i
>> dynamicrange
>> Object name: PROVISIONING-SVC
>> dynamicrange=10.2.72.2-10.2.72.254
>>
>>
>>
>> On Wed, Jul 1, 2015 at 12:01 PM, Samveen ListReceipient <
>> *[email protected]* <[email protected]>> wrote:
>>
>> The network related items of my node definition are as follows:
>>
>> [root@xcatmn01 xcat_prep]# lsdef -t node -o xcatsn01 -i
>> installnic,ip,mac,nicips,nictypes,primarynic,nichostnamesuffixes
>> Object name: xcatsn01
>> installnic=eth0
>> ip=10.4.0.10
>>
>>
>> mac=00:25:90:14:f8:18!xcatsn01-s|00:25:90:14:f8:19!xcatsn01|00:25:90:14:f2:c3!xcatsn01-m
>> nichostnamesuffixes.ipmi=-m
>> nichostnamesuffixes.eth0=-s
>> nicips.eth1=10.4.0.10
>> nicips.ipmi=10.1.240.10
>> nicips.eth0=10.2.72.4
>> nictypes.ipmi=Ethernet
>> nictypes.eth1=Ethernet
>> nictypes.eth0=Ethernet
>> primarynic=eth1
>>
>>
>> The /etc/hosts entries are as follows:
>> [root@xcatmn01 xcat_prep]# grep xcatsn01 /etc/hosts
>> 10.4.0.10 xcatsn01 *xcatsn01.poc.lzd.co* <http://xcatsn01.poc.lzd.co/>
>> xcatsn01-eth1
>> 10.1.240.10 xcatsn01-m *xcatsn01-m.poc.lzd.co*
>> <http://xcatsn01-m.poc.lzd.co/>
>> 10.2.72.4 xcatsn01-s *xcatsn01-s.poc.lzd.co*
>> <http://xcatsn01-s.poc.lzd.co/>
>>
>>
>> The DHCP lease entries are as follows:
>>
>> host xcatsn01 {
>> dynamic;
>> hardware ethernet 00:25:90:14:f8:19;
>> fixed-address 10.4.0.10;
>> supersede server.ddns-hostname = "xcatsn01";
>> supersede host-name = "xcatsn01";
>> if option user-class-identifier = "xNBA" and option
>> client-architecture = 00:00 {
>> supersede server.filename =
>> "http://$
>> {next-server}/tftpboot/xcat/xnba/nodes/xcatsn01";
>> } elsif option client-architecture = 00:00 {
>> supersede server.filename = "xcat/xnba.kpxe";
>> } else {
>> supersede server.filename = "";
>> }
>> }
>> host xcatsn01-m {
>> dynamic;
>> hardware ethernet 00:25:90:14:f2:c3;
>> fixed-address 10.1.240.10;
>> supersede server.ddns-hostname = "xcatsn01";
>> supersede host-name = "xcatsn01";
>> if option user-class-identifier = "xNBA" and option
>> client-architecture = 00:00 {
>> supersede server.filename =
>> "http://$
>> {next-server}/tftpboot/xcat/xnba/nodes/xcatsn01";
>> } elsif option client-architecture = 00:00 {
>> supersede server.filename = "xcat/xnba.kpxe";
>> } else {
>> supersede server.filename = "";
>> }
>> }
>> host xcatsn01-s {
>> dynamic;
>> hardware ethernet 00:25:90:14:f8:18;
>> supersede server.ddns-hostname = "xcatsn01";
>> supersede host-name = "xcatsn01";
>> if option user-class-identifier = "xNBA" and option
>> client-architecture = 00:00 {
>> supersede server.filename =
>> "http://$
>> {next-server}/tftpboot/xcat/xnba/nodes/xcatsn01";
>> } elsif option client-architecture = 00:00 {
>> supersede server.filename = "xcat/xnba.kpxe";
>> } else {
>> supersede server.filename = "";
>> }
>> }
>>
>>
>> As can be seen from the lease entry for xcatsn01-s and xcatsn01-m,
>> the ddns-hostname is the same for all 3 entries. My expectation of the
>> ddns
>> behaviour is that it should match the /etc/hosts (and `makedns`) actions.
>> ie. for xcatsn01-s, the server.ddns-hostname = "xcatsn01-s"; and for
>> xcatsn01-m, the server.ddns-hostname = "xcatsn01-m";
>>
>> The existing behaviour causes trouble for me as the IP for xcatsn01-s is
>> assigned from the dynamic range, instead of the static range, and thus my
>> /etc/hosts and DNS entries don't remain in sync, leading to unexpected
>> behaviour.
>>
>> Am I correct in my expectation or it is unrealistic?
>>
>> --
>> Samveen S. Gulati
>> *http://samveen.in* <http://samveen.in/>
>>
>> The best-laid schemes o' mice an 'men
>> Gang aft agley,
>> An'lea'e us nought but grief an' pain,
>> For promis'd joy!
>> -- Robert Burns
>> (The best laid plans of mice and men often go awry,
>> and bring nothing but grief and pain instead of ..)
>>
>>
>>
>>
>>
>> --
>> --
>> Samveen S. Gulati
>> *http://samveen.in* <http://samveen.in/>
>>
>> The best-laid schemes o' mice an 'men
>>
>> Gang aft agley,
>>
>> An'lea'e us nought but grief an' pain,
>>
>> For promis'd joy!
>> -- Robert Burns
>>
>> (The best laid plans of mice and men often go awry,
>> and bring nothing but grief and pain instead of ..)
>> ------------------------------------------------------------------------------
>> Don't Limit Your Business. Reach for the Cloud.
>> GigeNET's Cloud Solutions provide you with the tools and support that
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>> _______________________________________________
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>>
>>
>>
>> ------------------------------------------------------------------------------
>> Don't Limit Your Business. Reach for the Cloud.
>> GigeNET's Cloud Solutions provide you with the tools and support that
>> you need to offload your IT needs and focus on growing your business.
>> Configured For All Businesses. Start Your Cloud Today.
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>>
>>
>
>
> --
> --
> Samveen S. Gulati
> http://samveen.in
>
> The best-laid schemes o' mice an 'men
> Gang aft agley,
> An'lea'e us nought but grief an' pain,
> For promis'd joy!
> -- Robert Burns
> (The best laid plans of mice and men often go awry,
> and bring nothing but grief and pain instead of ..)
>
--
--
Samveen S. Gulati
http://samveen.in
The best-laid schemes o' mice an 'men
Gang aft agley,
An'lea'e us nought but grief an' pain,
For promis'd joy!
-- Robert Burns
(The best laid plans of mice and men often go awry,
and bring nothing but grief and pain instead of ..)
------------------------------------------------------------------------------
Don't Limit Your Business. Reach for the Cloud.
GigeNET's Cloud Solutions provide you with the tools and support that
you need to offload your IT needs and focus on growing your business.
Configured For All Businesses. Start Your Cloud Today.
https://www.gigenetcloud.com/
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