NIS : Configure Secondary Server2021/09/06 |
Configure NIS Secondary Server to continue NIS service if NIS Primary server would be down.
+----------------------+ | +----------------------+ | [ NIS Primary ] |10.0.0.30 | 10.0.0.31| [ NIS Client ] | | dlp.srv.world +----------+----------+ www.srv.world | | | | | | +----------------------+ | +----------------------+ +----------------------+ | | [ NIS Secondary ] |10.0.0.51 | | node01.srv.world +----------+ | | +----------------------+ |
[1] | |
[2] | Configure NIS Secondary Server. |
root@node01:~#
vi /etc/default/nis # line 11 : change (set NIS secondary) NISSERVER= slave
root@node01:~#
# This line gives access to everybody. PLEASE ADJUST!vi /etc/ypserv.securenets # comment out #0.0.0.0 0.0.0.0 #::/0 # add to the end : IP range you allow to access 255.255.255.0 10.0.0.0 # sync with NIS master server root@node01:~# /usr/lib/yp/ypinit -s dlp.srv.world We will need a few minutes to copy the data from dlp.srv.world. Transferring group.bygid... Trying ypxfrd ... success ..... ..... At this point, make sure that /etc/passwd and /etc/group have been edited so that when the NIS is activated, the data bases you have just created will be used, instead of the /etc ASCII files. |
[3] | Configure on NIS primary server for new NIS secondary host. |
root@dlp:~#
vi /var/yp/Makefile # line 23 : change NOPUSH= false
# update NIS databaseć–° root@dlp:~# /usr/lib/yp/ypinit -m At this point, we have to construct a list of the hosts which will run NIS servers. dlp.srv.world is in the list of NIS server hosts. Please continue to add the names for the other hosts, one per line. When you are done with the list, type a <control D>. next host to add: dlp.srv.world next host to add: node01.srv.world # specify NIS secondary next host to add: # Ctrl + D key The current list of NIS servers looks like this: dlp.srv.world node01.srv.world Is this correct? [y/n: y] y ..... ..... dlp.srv.world has been set up as a NIS master server. Now you can run ypinit -s dlp.srv.world on all slave server. |
[4] | Configure on NIS Client to bind NIS secondary, too. |
root@client:~#
vi /etc/yp.conf # add secondary server's setting to the end domain srv.world server dlp.srv.world
domain srv.world server node01.srv.world
systemctl restart nis
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