jenkins/common/container

# This file is meant to be SOURCED
#
#   Copyright 2016 RIFT.IO Inc
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
# container_funcs
# 24 June 2016 -- Jeremy Mordkoff -- Genesis

container_exists() { 
	if [ $# -ne 1 ]; then
		FATAL "arg is container name"
	fi
	lxc config show $1 2>&1 >/dev/null
	if [ $? -eq 0 ]; then
		DEBUG "container $1 exists"
		return 0
	else
		DEBUG "container $1 not found"
		return 1
	fi
}

create_container() { 
	if [ $# -ne 2 ]; then
		FATAL "args are image container"
	fi
	INFO "creating container $2 using image $1"
	DEBUG "lxc launch $1 $2"
	sudo lxc launch "$1" "$2"
}

container_exec() { 
	container="$1"
	shift
	DEBUG "exec in $1 \"$*\""
	lxc exec "$container" -- $*
}

wait_container_up() {
	[ $# -eq 1 ] || FATAL "arg is container name got $# args - $*"
	ct=0
	RE="1 received"
	while [ $ct -lt 60 ]; do
		let ct=ct+1
		output=$(container_exec "$1" ping -c 1 google.com)
		if [[ $output =~ $RE ]]; then	
			DEBUG "$1 is up"
			return
		fi
		INFO "waiting for container $1 to start"
		DEBUG "expected '$RE' in $output"
		sleep 1
	done
	FATAL "container $1 did not start"
}