cmapi writes on debian cluster 127.0.1.1 instead real address

Example

 <ModuleIPAddr1-1-3>127.0.1.1</ModuleIPAddr1-1-3>

        <ModuleHostName1-1-3>dnsname</ModuleHostName1-1-3>

            <ClusterManager>127.0.1.1</ClusterManager>

root cause is an entry in /etc/hostnames, which will be written on default on debian

Explanation:

https://www.debian.org/doc/manuals/debian-reference/ch05.en.html#_the_hostname_resolution

127.0.0.1 localhost

127.0.1.1 host_name

Test:

Create file gethostid.py

import sys, os

import optparse

import socket

remoteServer = sys.argv[1]

remoteServerIP = socket.gethostbyaddr(remoteServer)

print (remoteServerIP)

~$ python gethostid.py hostname

('hostname', [], ['127.0.1.1'])

on non-debian systems real IP will be provided

Even it works , if the dns name will be locally used,
but columnstore.xml will be copied from node1 to other nodes,
so other nodes get a problem, if they use

<ModuleIPAddr1-1-3>127.0.1.1</ModuleIPAddr1-1-3>

for PM1 as an IP.

So cmapi getting IP on debian systems in another way.

Config
/etc/hosts

can be a workarround, but due the fact, that is the default debian configuration,
it can be overwritten.