[ale] Set hostname in RHEL 7 kickstart?

[Lightner, Jeff]

In the RHEL7 discussion at RedHat meetup this week they mentioned this issue is addressed in RHEL7.1.


From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Brian Mathis
Sent: Thursday, April 30, 2015 4:17 PM
To: Atlanta Linux Enthusiasts
Subject: Re: [ale] Set hostname in RHEL 7 kickstart?

Set the hostname by making a tmp file with the 'network' kickstart command in the %pre script like this:
    echo "network --device=ens192 --hostname=${HOSTNAME}" > /tmp/ks-network-hostname
then include that file in the kickstart commands section of the file like this:
    %include /tmp/ks-network-hostname
Overwriting the files like you're doing is a blunt instrument and is sure to fail at some point (like you're seeing).  Use the kickstart commands as much as possible so anaconda can do the right thing.  I also treat every major release as a *major* release, which requires a complete review and rewrite to adapt to whatever changes were made.

❧ Brian Mathis
@orev

On Thu, Apr 30, 2015 at 2:53 PM, James Sumners <james.sumners at gmail.com<mailto:james.sumners at gmail.com>> wrote:
I have a post script to set network configurations that gets used in all of my kickstarts:

```
exec 6<&1
exec > /etc/sysconfig/network
cat <<HERE_DOC
NETWORKING=yes
HOSTNAME=$HOSTNAME
GATEWAY=$GATEWAY
HERE_DOC
exec 1<&6
```

Works great with RHEL 5/6, but since RHEL 7 switched to systemd not so much (due to hostnamectl [a totally unnecessary change]). According to the documentation[1], I should only have to put my hostname in `/etc/hostname`. So I added this to my post script:

```
cat /etc/redhat-release 1>/dev/null | grep "release 7"
if [ \$? -eq 0 ]; then
# RHEL 7
echo "Enabling RHEL 7 hostname"
exec 6<&1
exec > /etc/hostname
cat <<HERE_DOC
$HOSTNAME
HERE_DOC
exec 1<&6
fi
```

The "Enabling RHEL 7 hostname" doesn't get written to the kickstart post log, and the hostname doesn't get written to `/etc/hostname`.

Does anyone have a method for doing this?

[1] -- https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Migration_Planning_Guide/sect-Red_Hat_Enterprise_Linux-Migration_Planning_Guide-System_Management.html#sect-Red_Hat_Enterprise_Linux-Migration_Planning_Guide-System_Management-Hostname_Definition

--
James Sumners
http://james.sumners.info/ (technical profile)
http://jrfom.com/ (personal site)
http://haplo.bandcamp.com/ (band page)

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