Adding a Slave Server
After NIS is running, you might need to create an NIS slave
server that you did not include in the initial list given to ypinit.
To add an NIS slave server:
How to Add a Slave Server
- On the master server, become superuser or assume an equivalent role.
Roles contain authorizations and privileged commands. For more information about roles, see Chapter 9, Using Role-Based Access Control (Tasks), in System Administration Guide: Security Services.
- Change to the NIS domain directory.
# cd /var/yp/domainname
- Disassemble the ypservers file.
# makedbm -u ypservers >/tmp/temp_file
The makedbm command converts ypservers from ndbm format to a temporary ASCII file /tmp/temp_file.
- Edit the /tmp/temp_file file using a text editor. Add the name of the
new slave server to the list of servers. Then save and close the
file.
- Run the makedbm command with temp_file as the input file and ypservers as the
output file.
# makedbm /tmp/temp_file ypservers
makedbm then converts ypservers back into ndbm format.
- Verify that the ypservers map is correct (since there is no ASCII file
for ypservers) by typing the following on the slave.
slave3# makedbm -u ypservers
The makedbm command displays each entry in ypservers on your screen.
Note - If a machine name is not in ypservers, it will not receive updates
to the map files because yppush consults this map for the list of
slave servers.
- On the new NIS slave, become superuser or assume an equivalent role.
Roles contain authorizations and privileged commands. For more information about roles, see Chapter 9, Using Role-Based Access Control (Tasks), in System Administration Guide: Security Services.
- Set up the new slave server's NIS domain directory.
Copy the NIS map set from the master server, then start the
NIS client. When running the ypinit command, follow the prompts and list the NIS
servers in order of preference.
slave3# cd /var/yp
slave3# ypinit -c
slave3# svcadm enable network/nis/client
- Initialize this machine as a slave.
slave3# /usr/sbin/ypinit -s ypmaster
where ypmaster is the machine name of the existing NIS master server.
- Stop the machine running as an NIS client.
# svcadm disable network/nis/client
- Start NIS slave service.
# svcadm enable network/nis/server
