_ip=/usr/sbin/ip

_docker=/usr/bin/docker

_awk=/usr/bin/awk

_getent=/usr/bin/getent

_grep=/usr/bin/grep

_nsenter=/usr/bin/nsenter

_cat=/usr/bin/cat

_ovsctl=/usr/bin/ovs-vsctl

_md5=/usr/bin/md5sum

ACTION="unknown"

DBRIDGE=ovsbr0

NETMASK=24

SUBNET=10.0.0.0

IMAGE="odin/hadoop:datanode"

HOSTSFILE="/etc/hosts"

DATADIR=""

CMD="/lib/systemd/systemd"

OPTCOUNT=0

CheckArg() {

}

if expr 'index' "$1" '=' '=' '0' >/dev/null

case $1 in

start) ACTION="start" ;;

stop) ACTION="stop" ;;

esac

shift 1

echo "Syntaxe: dockerctl start|stop [image=xxx] [bridge=xx] [addr=x.x.x.x] [gateway=x.x.x.x] [subnet=x.x.x.0] [netmask=xx] [hosts=path_to_host] [data=path_to_data_dir] [cmd=xxx] FQDN"

exit 1

for arg in "$@"

if expr 'index' "$arg" '=' '>' '1' >/dev/null; then

CheckArg "${arg}"

fi

shift ${OPTCOUNT}; FQDN=$1

if test -z "${FQDN}"; then

echo "Syntaxe: dockerctl start|stop [image=xxx] [bridge=xx] [addr=x.x.x.x] [gateway=x.x.x.x] [subnet=x.x.x.0] [netmask=xx] [hosts=path_to_host] [data=path_to_data_dir] [cmd=xxx] FQDN"

exit 1

CNAME=$(echo "${FQDN}" | cut -d. -f1)

md5sum=$(${_md5} <<< "${CNAME}")

CS=${md5sum:0:8}

CNETNAME="veth${CS}"

DOCKRUNNING=`${_docker} ps -f status=running -f names=${CNAME} | ${_grep} ${CNAME}`

DOCKSTOP=`${_docker} ps -f status=exited -f names=${CNAME} | ${_grep} ${CNAME}`

case ${ACTION} in

start) # 启动操作

## check if already running

if test ! -z "${DOCKRUNNING}"; then

echo "Error: container=[${CNAME}] already running"

exit 1

fi

## check bridge

if test -z "${BRIDGE}" && test ! -z "${DOCKSTOP}"; then # 优先从现存container中找到gateway信息

BRIDGE=`${_docker} inspect --format {{.Config.Labels.bridge}} ${CNAME}` # get container namespace PID

if [ ${BRIDGE} == "<no value>" ]; then

BRIDGE=""

fi

fi

if test -z "$BRIDGE"; then # 还为空就是用默认值

BRIDGE=${DBRIDGE}

fi

${_ip} link show ${BRIDGE} >/dev/null

if test $? -ne 0; then

echo "Error: bridge=${BRIDGE} does not exist"

exit 1

fi

## 如果没有输入网关

if test -z "${GATEWAY}" && test ! -z "${DOCKSTOP}"; then # 优先从现存container中找到gateway信息

GATEWAY=`${_docker} inspect --format {{.Config.Labels.gateway}} ${CNAME}` # get container namespace PID

if [ ${GATEWAY} == "<no value>" ]; then

GATEWAY=""

fi

fi

if test -z "${GATEWAY}"; then

GATEWAY=`${_ip} route show 0.0.0.0/0 dev ${BRIDGE} | ${_awk} '{print $3}'`

if test -z "${GATEWAY}"; then

GATEWAY=`${_ip} route show ${SUBNET}/${NETMASK} dev ${BRIDGE} | ${_awk} '{print $7}'`

# 仍然找不到, 报错退出

if test -z "${GATEWAY}"; then

echo "Error: no default gateway for ${BRIDGE}"

exit 1

fi

fi

fi

# if no IP provided get one from DNS lookup(or hosts file)

if test -z "${CADDR}" && test ! -z "${DOCKSTOP}"; then # 优先从现存container中找到gateway信息

CADDR=`${_docker} inspect --format {{.Config.Labels.addr}} ${CNAME}` # get container namespace PID

if [ ${CADDR} == "<no value>" ]; then

CADDR=""

fi

fi

if test -z "${CADDR}"; then

CADDR=`${_getent} hosts ${FQDN} | ${_awk} '{print $1}'`

if test -z "${CADDR}"; then

echo "Error: host=${FQDN} no IP found"

exit 1

fi

fi

echo "Starting the container(name=${CNAME} addr=${CADDR}/${NETMASK})..."

if test -z "${DOCKSTOP}"; then

# bind volume

VPARA=""

if test ! -z "${HOSTSFILE}"; then

VPARA="${VPARA} -v ${HOSTSFILE}:/etc/hosts"

fi

if test ! -z "${DATADIR}"; then

VPARA="${VPARA} -v ${DATADIR}:/data"

fi

# custom metadata

CMPARA="--label bridge=${BRIDGE} --label addr=${CADDR} --label gateway=${GATEWAY} --label netmask=${NETMASK}"

${_docker} run -dit --name="${CNAME}" --hostname="${FQDN}" ${CMPARA} --net=none --privileged ${VPARA} ${IMAGE} ${CMD}

else

${_docker} start ${CNAME} >/dev/null

fi

# get container namespace PID

CPID=`${_docker} inspect --format {{.State.Pid}} ${CNAME}` # get container namespace PID

if test -z ${CPID}; then

echo "Hoops: failled to start container=[${CNAME}]"

exit

fi

# if root ssh auth does not exist buit one from hypervisor

#test -f /root/.ssh/authorized_keys

#if test $? -eq 0; then

# ${_nsenter} -t ${CPID} --mount ls /root/.ssh/authorized_keys >/dev/null 2>/dev/null

# if test $? -ne 0; then

# echo "Setting container initial /root/.ssh/authorized_keys"

# ${_nsenter} -t ${CPID} --mount mkdir -p /root/.ssh 2>/dev/null

# ${_cat} /root/.ssh/authorized_keys | ${_nsenter} -t ${CPID} --mount tee /root/.ssh/authorized_keys >/dev/null

# fi

#fi

# test if CNETNAME exists in ovs bridge ports

DIF=$(${_ovsctl} list-ports ${BRIDGE} | grep ${CNETNAME})

if [ ! -z ${DIF} ] && [ ${DIF} == ${CNETNAME} ]; then

${_ovsctl} del-port $BRIDGE $CNETNAME # delete old interface from the bridge ports(ovs version)

fi

${_ip} link add eth0 type veth peer name ${CNETNAME} # create a new interface on hypervisor

${_ip} link set ${CNETNAME} up # activate newly create interface on host

#brctl addif $BRIDGE $CNETNAME # add new interface to the bridge

${_ovsctl} add-port ${BRIDGE} ${CNETNAME} # add new interface to the bridge(ovs version)

${_ip} link set netns ${CPID} dev eth0 # move eth0 interface into container name space

${_nsenter} -t ${CPID} --net ${_ip} link set eth0 up # up eth0 within container

${_nsenter} -t ${CPID} --net ${_ip} addr add ${CADDR}/${NETMASK} dev eth0 # set IP addr within container

${_nsenter} -t ${CPID} --net ${_ip} route add default via ${GATEWAY} dev eth0

# test networking

${_docker} exec ${CNAME} ping -W 10 -c 1 ${GATEWAY} >/dev/null

if test $? -ne 0; then

echo "Warning: ${CNAME} started, but networking may has problems"

exit 1

else

echo "OK: ${CNAME}@${CADDR} started, You can enter container: docker exec -it ${CNAME} bash"

fi

;;

stop) # 停止操作

if test -z "${DOCKRUNNING}"; then

echo "Error: container=[${CNAME}] is not running"

exit 1

else

echo "Stopping running container=[${CNAME}]"

fi

## stop the container

${_docker} stop ${CNAME} >/dev/null

if test $? -eq 0; then

DIF=$(${_ovsctl} list-ports ${BRIDGE} | grep ${CNETNAME})

if [ ! -z ${DIF} ] && [ ${DIF} == ${CNETNAME} ]; then

${_ovsctl} del-port $BRIDGE $CNETNAME # delete old interface from the bridge ports(ovs version)

else

echo "Warning: not found port(${CNETNAME}) in ovs"

fi

echo "Stopping container=[${CNAME}] Successful"

fi

;;

*) # 其他不认识的操作

echo "Error: Unknown Action"

;;