prep-server.sh

#!/usr/bin/env bash

. $(dirname $0)/install.conf

# configure subscription repositories
subscription-manager register --username="$RHSM_USER" --password="$RHSM_PASS" \
    || exit 1

if [ -z "$POOL_ID" ]
then
    POOL_ID=$(subscription-manager list --available | \
    grep 'Subscription Name\|Pool ID\|System Type' | \
    grep -A2 'Employee SKU' | \
    grep -B1 Physical | \
    grep 'Pool ID' | awk '{print $NF; exit}')
fi

subscription-manager attach --pool="$POOL_ID" || exit 1
subscription-manager repos --disable='*'
subscription-manager repos \
    --enable=rhel-7-server-rpms \
    --enable=rhel-7-server-extras-rpms \
    --enable=rhel-7-server-ose-3.11-rpms \
    --enable=rhel-7-server-ansible-2.6-rpms

# update the system
yum -y update

# configure a separate volume group for docker (e.g. docker-vg)
DISK=$(parted -l | grep Disk | grep -v 'mapper\|Flags' | awk '{print $2; exit}' | cut -d: -f1)
FREESPACE=$(parted $DISK print free | grep 'Free Space' | tail -1)
START=$(echo $FREESPACE | awk '{print $1}')
END=$(echo $FREESPACE | awk '{print $2}')

PREBLKLIST=$(mktemp)
POSTBLKLIST=$(mktemp)

blkid | grep $DISK | cut -d: -f1 | sort > $PREBLKLIST
parted $DISK mkpart primary $START $END
PARTNUM=$(parted $DISK print | sort -n | tail -1 | awk '{print $1}')
parted $DISK set $PARTNUM lvm on
blkid | grep $DISK | cut -d: -f1 | sort > $POSTBLKLIST

PARTNAME=$(comm -13 $PREBLKLIST $POSTBLKLIST)
if [[ -z "$PARTNAME" ]]
then
    PARTNAME=$DISK$PARTNUM
fi

pvcreate $PARTNAME
vgcreate docker-vg $PARTNAME

rm -f $PREBLKLIST $POSTBLKLIST

yum -y clean all
systemctl reboot