base-rhel-image.md

Base RHEL Image

There are several ways to deploy rhel vm in RHEV but this doc does not explain about it. It only provide that what preparation are needed for the base image.

Storage for docker

• For root (20G)
• For docker (30G)

Example:

Size: 30
Alias: docker
Interface: VirtIO
Allocation Policy: Thin Provision

RedHat Subscription Manager Register

subscription-manager register --username=XXXX  --password=XXXX
subscription-manager attach --pool=XXXX

Enable/Install Necessary Repos and Packages

subscription-manager repos --disable="*"
yum-config-manager --disable \*
subscription-manager repos \
    --enable="rhel-7-server-rpms" \
    --enable="rhel-7-server-extras-rpms" \
    --enable rhel-7-server-rh-common-rpms

yum repolist

yum install -y wget git net-tools bind-utils iptables-services bridge-utils bash-completion kexec-tools sos psacct  rhevm-guest-agent-common 

yum update

# To get fqdn, ovirt-guest-agent should be installed
systemctl enable ovirt-guest-agent
systemctl start ovirt-guest-agent

New User and Configure sudoers

jooho is example user so you can change it

useradd jooho
echo "jooho ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

Sealing a Linux Virtual Machine

touch /.unconfigured
rm -rf /etc/ssh/ssh_host_*
echo "HOSTNAME=localhost.localdomain" >  /etc/sysconfig/network 
rm -rf /etc/udev/rules.d/70-*
subscription-manager clean

Network Script

Edit /etc/sysconfig/network-scripts/ifcfg-eth0

TYPE="Ethernet"
BOOTPROTO="dhcp"
NAME="eth0"
DEVICE="eth0"
ONBOOT="yes"
PEERDNS=no

Reference

• Sealing a Linux Virtual Machine