docker_pre-install-hn

#!/bin/bash

MODPROBE_FILE="/etc/sysconfig/modules/docker.modules"
MODULE_LIST="veth"
VZLIST="/usr/sbin/vzlist"
VZCTL="/usr/sbin/vzctl"
VERSION=1

VEROOT=$1
VEID=$2

function error_msg() {
	echo $*
	exit 1
}

function setup_modprobe() {
	cat << EOF > $MODPROBE_FILE 2>/dev/null
#!/bin/sh

VERSION=$VERSION
MODULE_LIST="$MODULE_LIST"

for module in \$MODULE_LIST; do
    modprobe -b \$module > /dev/null 2>&1
done

exit 0
EOF

	[ $? -ne 0 ] && error_msg "Failed to create $MODPROBE_FILE file"

	chmod 0755 $MODPROBE_FILE > /dev/null 2>&1
	[ $? -ne 0 ] && error_msg "Failed to make $MODPROBE_FILE executable"
}

# 1. Check for vzkernel supports docker - 7.0, already supported

# 2. Check for Container is ploop - 7.0, only ploops

# 3. Check for needed features
$VZLIST -H -o features $VEID 2>/dev/null | grep 'bridge:on' > /dev/null 2>&1
[ $? -ne 0 ] && error_msg "Failed to install docker template: feature bridge should be on"

$VZLIST -H -o netfilter $VEID 2>/dev/null | grep '^full' > /dev/null 2>&1
[ $? -ne 0 ] && error_msg "Failed to install docker template: netfilter should be full"

# 4. Setup docker-required modules autoload
if [ -x $MODPROBE_FILE ]; then
	EXISTING_VERSION=`cat $MODPROBE_FILE | grep ^VERSION | sed "s,VERSION=,,g"`
	[ -z $EXISTING_VERSION ] && EXISTING_VERSION=0
	[ $EXISTING_VERSION -lt $VERSION ] && setup_modprobe
else
	setup_modprobe
fi

# 5. Load modules
$MODPROBE_FILE
[ $? -ne 0 ] && error_msg "Failed to load required modules"

exit 0