adding DNS roundrobin in mgmt node DNS server

[techie879]

Hi,

I have 6 nodes that I need to create a DNS RR name for.

[root@hpc3-xcat-1 named]# cat /etc/hosts |grep crsp 10.20.20.14 crspoitdc-gn-001 crspoitdc-gn-001.local crsp-nfs 10.20.20.15 crspoitdc-gn-002 crspoitdc-gn-002.local crsp-nfs 10.20.20.13 crspoitdc-gn-003 crspoitdc-gn-003.local crsp-nfs 10.20.20.12 crspicsdc-gn-001 crspicsdc-gn-001.local crsp-nfs 10.20.20.11 crspicsdc-gn-002 crspicsdc-gn-002.local crsp-nfs 10.20.20.10 crspicsdc-gn-003 crspicsdc-gn-003.local crsp-nfs [root@hpc3-xcat-1 named]# nslookup crspicsdc-gn-001 Server: 127.0.0.1 Address: 127.0.0.1#53

Name: crspicsdc-gn-001.local Address: 10.20.20.12

I need to create RR record called "crsp-nfs" for these machines listed above. It looks like makedns does not seem to support this.

I have the nodes added in xcat, I can individually query their IP addresses. But, I can't seem to do nslookup on 'crsp-nfs'.

I can see the zones are created in /var/named

[root@hpc3-xcat-1 named]# grep crsp * grep: data: Is a directory db.10.20:10 PTR crspicsdc-gn-003.local. db.10.20:11 PTR crspicsdc-gn-002.local. db.10.20:12 PTR crspicsdc-gn-001.local. db.10.20:13 PTR crspoitdc-gn-003.local. db.10.20:14 PTR crspoitdc-gn-001.local. db.10.20:15 PTR crspoitdc-gn-002.local. Binary file db.10.20.jnl matches db.local:crspicsdc-gn-001 A 10.20.20.12 db.local:crspicsdc-gn-002 A 10.20.20.11 db.local:crspicsdc-gn-003 A 10.20.20.10 db.local:crspoitdc-gn-001 A 10.20.20.14 db.local:crspoitdc-gn-002 A 10.20.20.15 db.local:crspoitdc-gn-003 A 10.20.20.13 Binary file db.local.jnl matches grep: dynamic: Is a directory grep: slaves: Is a directory

How do I set this up?

thanks.

[kcgthb]

I don't think that's supported at this time (only CNAME aliases on a single entry are, via the hosts table), but I'd love that feature too!

[samveen]

A possible implementation for this is something that came about as a by-product of DNS separation from xCAT we'd implemented at one of our sites. The DNS deployment was a CI/CD pipeline implemented against a git repo containing all the DNS records, and any xCAT changes required prior changes to DNS (in this case a merge into the production branch). This had the nasty side effect of causing every DNS based xcat command to fail, but given our constraints, we were fine with it.

[blixuga]

Might want to look at the new setting in 2.16. In the site table there is now a "namedincludes" key that allows you to include external files into the named config. From https://xcat-docs.readthedocs.io/en/stable/guides/admin-guides/references/man5/site.5.html?highlight=namedinclude

                 named.conf, using named 'include' statement. This can allow users
                 to include local configuration options that will not be overwritten
                 by 'makedns -n'