Configure Network Names
Configure each host in the cluster as follows to ensure that all members can communicate with each other:
- Set the hostname to a unique name (not localhost).
sudo hostnamectl set-hostname foo-1.example.com
- Edit /etc/hosts with the IP address and fully qualified domain name (FQDN) of each host in the cluster. You can add the unqualified name as well.
18.104.22.168 foo-1.example.com foo-1 22.214.171.124 foo-2.example.com foo-2 126.96.36.199 foo-3.example.com foo-3 188.8.131.52 foo-4.example.com foo-4
- Edit /etc/sysconfig/network with the FQDN of this host only:
- Verify that each host consistently identifies to the network:
- Run uname -a and check that the hostname matches the output of the hostname command.
- Run /sbin/ifconfig and note the value of inet addr in the eth0 (or bond0) entry, for example:
eth0 Link encap:Ethernet HWaddr 00:0C:29:A4:E8:97 inet addr:172.29.82.176 Bcast:172.29.87.255 Mask:255.255.248.0 ...
- Run host -v -t A $(hostname) and verify that the output matches the hostname command.
The IP address should be the same as reported by ifconfig for eth0 (or bond0):
Trying "foo-1.example.com" ... ;; ANSWER SECTION: foo-1.example.com. 60 IN A 172.29.82.176