Add localhost binding in /etc/hosts

[k-c-p]

The roles adds an entry in /etc/hosts that links 127.0.0.1 to the hostname and server-FQDN. Something like:

127.0.0.1    server.fqdn    server.hostname

As a consequence there is no entry for localhost in /etc/hosts which may affect services that rely on this. Suggestion is to adopt the role that the entry in /etc/hosts includes localhost and looks like this:

127.0.0.1    server.fqdn    server.hostname    localhost

[xenithorb]

Indeed you are correct, and I've had the fix here for a little while. I've been extremely busy, and I need to be more diligent about pushing code to master:

fb315af#diff-2444ad0870f91f17ca6c2a5e96b26823R118

There are quite a few updates contained in that branch. You're welcomed to test it (that branch) if you want. I'll make sure to add a "Fixes" fo the commit message before I marge it

[jautz]

Allow me to add a few suggestions from our code base that currently has this as a workaround:

• the regexp could be a bit more precise, i.e. escape the literal dots and require any kind of whitespace after the final digit -- otherwise it would match 127.0.0.123 as well.
• if missing, insert on top of the hosts file because on many systems it is IPv4 on top and IPv6 below.

- lineinfile:
    dest: /etc/hosts
    line:  "127.0.0.1\tlocalhost\t{{ ansible_fqdn }}\t{{ ansible_nodename }}\t{{ ansible_hostname }}"
    regexp: '^127\.0\.0\.1\s+'
    insertbefore: BOF