[Spacewalk-list] kickstart, cobbler and hostnames

[Lachlan Musicman]

Two days before I joined!

Ok, I've ended up using this system, although instead of using random, I've
got this little one liner:

ID=$(cut -d':' -f6 /sys/class/net/enp6s0/address)
echo "network --hostname=slurm-$ID.mydomain.com" > /tmp/pre-hostname

Works a treat

Cheers
L.

------
The most dangerous phrase in the language is, "We've always done it this
way."

- Grace Hopper

On 23 March 2016 at 18:20, Lachlan Musicman <datakid at gmail.com> wrote:

> Thanks, but we are after a defined hostname from a list, or at least an
> 'incremental', rather than a random, hostname. But I will read up on it
> tomorrow.
>
> cheers
> L.
>
> ------
> The most dangerous phrase in the language is, "We've always done it this
> way."
>
> - Grace Hopper
>
> On 23 March 2016 at 16:28, Daniel Eather <daniel.eather at cranegroup.com.au>
> wrote:
>
>> Admittedly I’ve not read all the things you’ve tried, but there was a
>> post by Emmett a few days back about assigning a random hostname on build.
>> It may help?
>>
>>
>>
>>
>>
>>
>>
>> *From: spacewalk-list-bounces at redhat.com
>> <spacewalk-list-bounces at redhat.com>
>> [mailto:spacewalk-list-bounces at redhat.com
>> <spacewalk-list-bounces at redhat.com>] On Behalf Of Emmett Hogan*
>>
>> *Sent: Saturday, 5 March 2016 3:20 AM*
>>
>> *To: spacewalk-list at redhat.com <spacewalk-list at redhat.com>*
>>
>> *Subject: Re: [Spacewalk-list] Set Random Hostname During Build process
>> (SOLUTION)*
>>
>>
>>
>> *Well…I never got a response from the list (or the IRC Channel) on this,
>> but it turns out the solution is WAY easier than I thought, but not very
>> intuitive.*
>>
>>
>>
>> *I simply put this line in as a “PRE” bash script:*
>>
>>
>>
>> *echo "network --hostname=temp-$RANDOM$RANDOM.mydomain.com
>> <http://RANDOM.mydomain.com>" > /tmp/pre-hostname*
>>
>>
>>
>> *Then put the line:*
>>
>>
>>
>> *%include /tmp/pre-hostname*
>>
>>
>>
>> *into the “Custom Options” box at the bottom of the “Kickstart Details”
>> -> “Advanced Options” page for your kickstart profile.*
>>
>>
>>
>> *Hopefully this will save time for other folks.*
>>
>>
>>
>> *-Emmett*
>>
>>
>>
>> *From:* spacewalk-list-bounces at redhat.com [mailto:
>> spacewalk-list-bounces at redhat.com] *On Behalf Of *Lachlan Musicman
>> *Sent:* Wednesday, 23 March 2016 3:08 PM
>> *To:* spacewalk-list at redhat.com
>> *Subject:* [Spacewalk-list] kickstart, cobbler and hostnames
>>
>>
>>
>> Hola,
>>
>> I've found a number of ideas online about how to inject the hostname into
>> a kickstart'ed installation, but I'm still unable to get a server to boot
>> using a hostname that isn't generic.  I don't have admin access to the DNS
>> or DHCP server, so I can't use either of those.
>>
>> I have tried a post install script, but that failed to change the
>> hostname.
>>
>>
>>
>> There is the pre-script pass as kernel parameter option, which I don't
>> like much
>>
>>
>> http://monzell.com/post/15547967527/automatically-set-the-hostname-during-kickstart
>>
>>
>>
>> and the network config line which I'm also ambivalent on:
>>
>> http://forums.fedoraforum.org/showthread.php?t=285238
>>
>> given that I want dynamic names (if I launch 20 servers from the same
>> profile, I want them to have unique hostnames that aren't
>> localhost.localdomain). Neither of these systems is dynamic enough for
>> this, unless I'm missing something?
>>
>> I found this email:
>>
>> https://www.redhat.com/archives/spacewalk-list/2015-July/msg00054.html
>>
>> which lead me to "3.1.4.6. Adding a System to Cobbler" here
>> https://access.redhat.com/documentation/en-US/Red_Hat_Satellite/5.6/html/Getting_Started_Guide/chap-Getting_Started_Guide-System_Provisioning.html
>>
>>
>>
>> I created a pool of MAC addresses and then added them as cobbler systems,
>> I regenerated the generated.iso - but the systems that are booting aren't
>> getting the "cobbler system" that was created for each of them?
>>
>> I'm not 100% sure at which point the "cobbler system" should be taking
>> control - I'm still getting a boot menu with a list of KS profiles to
>> choose from, despite each cobbler system being associated with a ks
>> profile...
>>
>> What am I doing wrong or not understanding wrt cobbler systems? Is it
>> because my NICs are vNICS and therefore the MAC addresses are ...?
>>
>> If, alternatively, I was to do something in a %post, like this
>>
>> %post --nochroot
>>
>> echo $hostname > /mnt/sysimage/home/hostname
>>
>> (as found here:
>>
>> http://serverfault.com/questions/608544/passing-variables-in-kickstart )
>>
>> I presume I could apply hostnames depending on the MAC address, which
>> presumably I can get in %post via # ifconfig | grep ether | awk '{print
>> $2}' or somesuch
>>
>>
>>
>>
>>
>> Cheers
>>
>> L.
>>
>>
>>
>>
>>
>>
>>
>> ------
>> The most dangerous phrase in the language is, "We've always done it this
>> way."
>>
>> - Grace Hopper
>>
>> ______________________________________________________________________
>> Any views expressed in this message are those of the individual sender,
>> except where the sender specifically states them to be the views of
>> Fletcher Building or any related subsidiaries.
>>
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>
>
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