Use the viprexec commandline to ask each nodes of ECS cluster. Use instead sudo command line to ask on the ECS manager

admin@ecs1mgt01:~> viprexec 'sudo cat /etc/os-release'
Output from host : 192.10.22.1
NAME="SLES"
VERSION="12-SP3"
VERSION_ID="12.3"
PRETTY_NAME="SUSE Linux Enterprise Server 12 SP3"
ID="sles"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:suse:sles:12:sp3"

admin@ecs1mgt01:~> sudo cat /etc/ntp.conf
...
server ntp01.local.lu iburst
server ntp02.local.lu iburst

ECS is highly reliant on working DNS. DU (Data Unavailable) can be caused if DNS resolution is not working. Every change on DNS config need to be confirmed with the customer before making any changes. Consult a coach or a senior TSE in case of any question.

How to add IP's / DNSSearch to DNS config:

Use setrackinfo -a to configure the DNS server. Repeat the command for each DNS server at the customer site (or separate with space).

# sudo setrackinfo -a DNSServer <DNS_Server_IP>

Example:

# sudo setrackinfo -a DNSServer 10.1.2.3
# sudo setrackinfo -a DNSServer 10.2.3.4

or

# sudo setrackinfo -a DNSServer 10.1.2.3 10.2.3.4

Use setrackinfo -a to configure DNS search. You must run the command once for each specification order of most specific to least specific.

# sudo setrackinfo -a DNSSearch <DNS_Search_Specification>

Example:

# sudo setrackinfo -a DNSSearch corp.emc.com
# sudo setrackinfo -a DNSSearch emc.com

Run setrackinfo -a once for each NTP server to be added.

# sudo setrackinfo -a NTPServer <NTP_Server_IP>

Example:

# sudo setrackinfo -a NTPServer 10.3.4.5

Check the results using getrackinfo -r Example:

provo:~ # getrackinfo -r
Rack Master Info
================
ChassisID = 00:01:02:63:1d:1e
RackID = 1
RackName = red
epoxy = False

Basic Config:
-------------
        EcsManagedBmc = no
        RackInstallServer = no

Network Config:
---------------
        DNSSearch =  corp.emc.com emc.com
        DNSServer =  10.1.2.3 10.2.3.4
        NTPServer =  10.3.4.5

System Config:
--------------
        NANDomain = nan
        NANNetwork = 169.254.0.0/16
        NANVlan = 4
        PublicVlan = 1
        RackFirstNode = 1
        RackLastNode = 24
        RackNetwork = 192.168.219.0/24
        RackSwitchCommunityName = public
        RackVlan = 0

Use setrackinfo -d to remove one or more from a list (applies to DNSServer,DNSSearch and NTPServer) Example:

# sudo setrackinfo -d DNSServer 10.60.28.149 10.73.240.235