Hi Paddy,
Paddy Doyle <[email protected]> writes:
> Hi Loris,
>
> On Tue, Mar 15, 2016 at 11:43:55AM +0100, Loris Bennett wrote:
>
>> Hi,
>>
>> I'm using ansible to set up two servers and have run into the problem
>> that on one server 'hostname' returns the just the name of the machine,
>> but on the other I get the FQDN:
>>
>> # hostname -s; hostname -d; hostname -f; hostname
>> tadmin01
>> test.cluster
>> tadmin01.test.cluster
>> tadmin01
>>
>> # hostname -s; hostname -d; hostname -f; hostname
>> tadmin02
>> test.cluster
>> tadmin02.test.cluster
>> tadmin02.test.cluster
>>
>> The following files are identical on both servers
>>
>> /etc/hosts
>> /etc/resolv.conf
>>
>> The files
>>
>> /etc/sysconfig/network
>>
>> differs just in the following way:
>>
>> < HOSTNAME=tadmin01
>> ---
>> > HOSTNAME=tadmin02
>>
>> What other files could have an influence on what 'hostname' returns?
>
> Is caching an issue? E.g. with sssd or nscd? That gave us some trouble with
> ansible iirc.
I also suspected something might be being cached, but I have restarted
all the services I thought might play a role and the difference remains.
> We ended up using an explicit ansible rule to set the FQDN in
> /etc/sysconfig/network just to make sure that every node was consistent. And
> then if necessary use "hostname -s" or "hostname -f" as required.
The problem is that I am setting up DRDB with the following resource
definition:
resource r0 {
net {
protocol C;
allow-two-primaries yes;
}
on tadmin01 {
device /dev/drbd0;
disk /dev/sda1;
address 10.141.235.254:7789;
meta-disk internal;
}
on tadmin02 {
device /dev/drbd0;
disk /dev/sda1;
address 10.141.235.253:7789;
meta-disk internal;
}
}
However, when I do
drbdadm create-md r0
I get the error
'r0' not defined in your config (for this host).
>From my googling my understanding is that the entry in the DRDB config
must match the result returned by 'hostname'. I can obviously just
tweak the DRDB config to make it work, but I would really like to
understand why 'hostname' without any options gives me the FQDN in one
case and not in the other
Cheers,
Loris
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