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Code Issues Releases Wiki Activity

Fix support of Docker Network

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This commit is contained in:
Julien Kassar 2016-10-25 23:08:35 -04:00
parent f542ba9ec1
commit 26b38436db
1 changed files with 56 additions and 24 deletions
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66
docker.sh
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@ -12,6 +12,27 @@ chain_exists() {
iptables $table -n --list "$chain_name" >/dev/null 2>&1 iptables $table -n --list "$chain_name" >/dev/null 2>&1
} }
add_to_forward() {
local docker_int=$1
if [ `iptables -nvL FORWARD | grep ${docker_int} | wc -l` -eq 0 ]; then
iptables -A FORWARD -o ${docker_int} -j DOCKER
iptables -A FORWARD -o ${docker_int} -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i ${docker_int} ! -o ${docker_int} -j ACCEPT
iptables -A FORWARD -i ${docker_int} -o ${docker_int} -j ACCEPT
fi
}
add_to_docker_isolation() {
local int_in=$1
local int_out=$2
iptables -C -A DOCKER-ISOLATION -i ${int_in} -o ${int_out} -j DROP > /dev/null 2>&1
if [ $? -eq 0 ]; then
iptables -A DOCKER-ISOLATION -i ${int_in} -o ${int_out} -j DROP
fi
}
DOCKER_INT="docker0" DOCKER_INT="docker0"
DOCKER_NETWORK="172.17.0.0/16" DOCKER_NETWORK="172.17.0.0/16"
@ -20,41 +41,52 @@ chain_exists DOCKER && iptables -X DOCKER
chain_exists DOCKER nat && iptables -t nat -X DOCKER chain_exists DOCKER nat && iptables -t nat -X DOCKER
iptables -N DOCKER iptables -N DOCKER
iptables -t nat -N DOCKER
iptables -N DOCKER-ISOLATION iptables -N DOCKER-ISOLATION
iptables -t nat -N DOCKER
iptables -A DOCKER-ISOLATION -j RETURN
iptables -A FORWARD -j DOCKER-ISOLATION iptables -A FORWARD -j DOCKER-ISOLATION
iptables -A FORWARD -o ${DOCKER_INT} -j DOCKER add_to_forward ${DOCKER_INT}
iptables -A FORWARD -o ${DOCKER_INT} -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i ${DOCKER_INT} ! -o ${DOCKER_INT} -j ACCEPT
iptables -A FORWARD -i ${DOCKER_INT} -o ${DOCKER_INT} -j ACCEPT
iptables -t nat -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER iptables -t nat -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
iptables -t nat -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER iptables -t nat -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
iptables -t nat -A POSTROUTING -s ${DOCKER_NETWORK} ! -o ${DOCKER_INT} -j MASQUERADE iptables -t nat -A POSTROUTING -s ${DOCKER_NETWORK} ! -o ${DOCKER_INT} -j MASQUERADE
iptables -A DOCKER-ISOLATION -j RETURN
containers=`docker ps -q` containers=`docker ps -q`
if [ `echo ${containers} | wc -c` -gt "1" ] ; then if [ `echo ${containers} | wc -c` -gt "1" ]; then
for container in ${containers} ; do for container in ${containers}; do
rules=`docker port ${container} | sed 's/ //g'`
if [ `echo ${rules} | wc -c` -gt "1" ] ; then
netmode=`docker inspect -f "{{.HostConfig.NetworkMode}}" ${container}` netmode=`docker inspect -f "{{.HostConfig.NetworkMode}}" ${container}`
if [ $netmode == "default" ]; then if [ $netmode == "default" ]; then
DOCKER_NET_INT=${DOCKER_INT} DOCKER_NET_INT=${DOCKER_INT}
ipaddr=`docker inspect -f "{{.NetworkSettings.IPAddress}}" ${container}` ipaddr=`docker inspect -f "{{.NetworkSettings.IPAddress}}" ${container}`
else else
networkid=`docker inspect -f "{{.NetworkSettings.Networks.${netmode}.NetworkID}}" ${container} | cut -c -12` DOCKER_NET_INT="br-$(docker inspect -f \"{{.NetworkSettings.Networks.${netmode}.NetworkID}}\" ${container} | cut -c -12)"
DOCKER_NET_INT="br-${networkid}"
ipaddr=`docker inspect -f "{{.NetworkSettings.Networks.${netmode}.IPAddress}}" ${container}` ipaddr=`docker inspect -f "{{.NetworkSettings.Networks.${netmode}.IPAddress}}" ${container}`
add_to_docker_isolation ${DOCKER_INT} ${DOCKER_NET_INT}
add_to_docker_isolation ${DOCKER_NET_INT} ${DOCKER_INT}
for net in `docker network ls | awk '{ print $2 }' | grep -Ev "bridge|host|null|ID|${netmode}"`; do
DINT="br-$(docker network inspect -f '{{.Id}}' ${net} | cut -c -12)"
add_to_docker_isolation ${DOCKER_NET_INT} ${DINT}
done
add_to_forward ${DOCKER_NET_INT}
iptables -C -t nat -I DOCKER -i ${DOCKER_NET_INT} -j RETURN > /dev/null 2>&1
if [ $? -eq 0 ]; then
iptables -t nat -I DOCKER -i ${DOCKER_NET_INT} -j RETURN
fi
fi fi
for rule in ${rules} ; do rules=`docker port ${container} | sed 's/ //g'`
if [ `echo ${rules} | wc -c` -gt "1" ]; then
for rule in ${rules}; do
src=`echo ${rule} | awk -F'->' '{ print $2 }'` src=`echo ${rule} | awk -F'->' '{ print $2 }'`
dst=`echo ${rule} | awk -F'->' '{ print $1 }'` dst=`echo ${rule} | awk -F'->' '{ print $1 }'`
@ -68,7 +100,7 @@ if [ `echo ${containers} | wc -c` -gt "1" ] ; then
iptables -t nat -A POSTROUTING -s ${ipaddr}/32 -d ${ipaddr}/32 -p ${dst_proto} -m ${dst_proto} --dport ${dst_port} -j MASQUERADE iptables -t nat -A POSTROUTING -s ${ipaddr}/32 -d ${ipaddr}/32 -p ${dst_proto} -m ${dst_proto} --dport ${dst_port} -j MASQUERADE
if [ $src_ip == "0.0.0.0" ] ; then if [ $src_ip == "0.0.0.0" ]; then
iptables -t nat -A DOCKER ! -i ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${src_port} -j DNAT --to-destination ${ipaddr}:${dst_port} iptables -t nat -A DOCKER ! -i ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${src_port} -j DNAT --to-destination ${ipaddr}:${dst_port}
else else
iptables -t nat -A DOCKER -d ${src_ip}/32 ! -i ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${src_port} -j DNAT --to-destination ${ipaddr}:${dst_port} iptables -t nat -A DOCKER -d ${src_ip}/32 ! -i ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${src_port} -j DNAT --to-destination ${ipaddr}:${dst_port}