Use multiple isolation levels & fix bridges with custom names
This commit is contained in:
Kurounin
Julien Kassar
parent
c75b0f1cf0
commit
61513b408f
130
docker.sh
130
docker.sh
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@ -13,24 +13,29 @@ chain_exists() {
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}
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add_to_forward() {
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local docker_int=$1
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local docker_int=$1
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if [ `iptables -nvL FORWARD | grep ${docker_int} | wc -l` -eq 0 ]; then
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iptables -A FORWARD -o ${docker_int} -j DOCKER
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iptables -A FORWARD -o ${docker_int} -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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iptables -A FORWARD -i ${docker_int} ! -o ${docker_int} -j ACCEPT
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iptables -A FORWARD -i ${docker_int} -o ${docker_int} -j ACCEPT
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fi
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if [ `iptables -nvL FORWARD | grep ${docker_int} | wc -l` -eq 0 ]; then
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iptables -A FORWARD -o ${docker_int} -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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iptables -A FORWARD -o ${docker_int} -j DOCKER
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iptables -A FORWARD -i ${docker_int} ! -o ${docker_int} -j ACCEPT
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iptables -A FORWARD -i ${docker_int} -o ${docker_int} -j ACCEPT
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fi
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}
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add_to_nat() {
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local docker_int=$1
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local subnet=$2
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iptables -t nat -A POSTROUTING -s ${subnet} ! -o ${docker_int} -j MASQUERADE
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iptables -t nat -A DOCKER -i ${docker_int} -j RETURN
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}
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add_to_docker_isolation() {
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local int_in=$1
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local int_out=$2
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local docker_int=$1
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iptables -C -A DOCKER-ISOLATION -i ${int_in} -o ${int_out} -j DROP > /dev/null 2>&1
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if [ $? -eq 0 ]; then
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iptables -A DOCKER-ISOLATION -i ${int_in} -o ${int_out} -j DROP
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fi
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iptables -A DOCKER-ISOLATION-STAGE-1 -i ${docker_int} ! -o ${docker_int} -j DOCKER-ISOLATION-STAGE-2
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iptables -A DOCKER-ISOLATION-STAGE-2 -o ${docker_int} -j DROP
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}
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DOCKER_INT="docker0"
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@ -41,73 +46,76 @@ chain_exists DOCKER && iptables -X DOCKER
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chain_exists DOCKER nat && iptables -t nat -X DOCKER
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iptables -N DOCKER
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iptables -N DOCKER-ISOLATION
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iptables -N DOCKER-ISOLATION-STAGE-1
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iptables -N DOCKER-ISOLATION-STAGE-2
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iptables -N DOCKER-USER
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iptables -t nat -N DOCKER
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iptables -A FORWARD -j DOCKER-ISOLATION
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iptables -A FORWARD -j DOCKER-USER
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iptables -A FORWARD -j DOCKER-ISOLATION-STAGE-1
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add_to_forward ${DOCKER_INT}
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iptables -t nat -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
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iptables -t nat -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
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iptables -t nat -A POSTROUTING -s ${DOCKER_NETWORK} ! -o ${DOCKER_INT} -j MASQUERADE
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bridges=`docker network ls -q --filter='Driver=bridge'`
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for bridge in $bridges; do
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DOCKER_NET_INT=`docker network inspect -f '{{"br-$bridge" | or (index .Options "com.docker.network.bridge.name")}}' $bridge`
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subnet=`docker network inspect -f '{{(index .IPAM.Config 0).Subnet}}' $bridge`
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add_to_nat ${DOCKER_NET_INT} ${subnet}
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add_to_forward ${DOCKER_NET_INT}
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add_to_docker_isolation ${DOCKER_NET_INT}
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done
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containers=`docker ps -q`
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if [ `echo ${containers} | wc -c` -gt "1" ]; then
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for container in ${containers}; do
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netmode=`docker inspect -f "{{.HostConfig.NetworkMode}}" ${container}`
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for container in ${containers}; do
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netmode=`docker inspect -f "{{.HostConfig.NetworkMode}}" ${container}`
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if [ $netmode == "default" ]; then
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DOCKER_NET_INT=${DOCKER_INT}
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ipaddr=`docker inspect -f "{{.NetworkSettings.IPAddress}}" ${container}`
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else
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bridge=$(docker inspect -f "{{.NetworkSettings.Networks.${netmode}.NetworkID}}" ${container} | cut -c -12)
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DOCKER_NET_INT=`docker network inspect -f '{{"br-$bridge" | or (index .Options "com.docker.network.bridge.name")}}' $bridge`
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ipaddr=`docker inspect -f "{{.NetworkSettings.Networks.${netmode}.IPAddress}}" ${container}`
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fi
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if [ $netmode == "default" ]; then
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DOCKER_NET_INT=${DOCKER_INT}
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ipaddr=`docker inspect -f "{{.NetworkSettings.IPAddress}}" ${container}`
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else
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DOCKER_NET_INT="br-$(docker inspect -f "{{.NetworkSettings.Networks.${netmode}.NetworkID}}" ${container} | cut -c -12)"
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ipaddr=`docker inspect -f "{{.NetworkSettings.Networks.${netmode}.IPAddress}}" ${container}`
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rules=`docker port ${container} | sed 's/ //g'`
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add_to_docker_isolation ${DOCKER_NET_INT} ${DOCKER_INT}
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add_to_docker_isolation ${DOCKER_INT} ${DOCKER_NET_INT}
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if [ `echo ${rules} | wc -c` -gt "1" ]; then
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for rule in ${rules}; do
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src=`echo ${rule} | awk -F'->' '{ print $2 }'`
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dst=`echo ${rule} | awk -F'->' '{ print $1 }'`
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for net in `docker network ls | awk '{ print $2 }' | grep -Ev "bridge|host|null|ID|${netmode}"`; do
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dint="br-$(docker network inspect -f '{{.Id}}' ${net} | cut -c -12)"
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src_ip=`echo ${src} | awk -F':' '{ print $1 }'`
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src_port=`echo ${src} | awk -F':' '{ print $2 }'`
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add_to_docker_isolation ${DOCKER_NET_INT} ${dint}
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done
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dst_port=`echo ${dst} | awk -F'/' '{ print $1 }'`
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dst_proto=`echo ${dst} | awk -F'/' '{ print $2 }'`
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add_to_forward ${DOCKER_NET_INT}
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iptables -A DOCKER -d ${ipaddr}/32 ! -i ${DOCKER_NET_INT} -o ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${dst_port} -j ACCEPT
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iptables -C -t nat -I DOCKER -i ${DOCKER_NET_INT} -j RETURN > /dev/null 2>&1
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if [ $? -eq 0 ]; then
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iptables -t nat -I DOCKER -i ${DOCKER_NET_INT} -j RETURN
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fi
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fi
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iptables -t nat -A POSTROUTING -s ${ipaddr}/32 -d ${ipaddr}/32 -p ${dst_proto} -m ${dst_proto} --dport ${dst_port} -j MASQUERADE
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rules=`docker port ${container} | sed 's/ //g'`
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if [ `echo ${rules} | wc -c` -gt "1" ]; then
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for rule in ${rules}; do
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src=`echo ${rule} | awk -F'->' '{ print $2 }'`
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dst=`echo ${rule} | awk -F'->' '{ print $1 }'`
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src_ip=`echo ${src} | awk -F':' '{ print $1 }'`
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src_port=`echo ${src} | awk -F':' '{ print $2 }'`
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dst_port=`echo ${dst} | awk -F'/' '{ print $1 }'`
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dst_proto=`echo ${dst} | awk -F'/' '{ print $2 }'`
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iptables -A DOCKER -d ${ipaddr}/32 ! -i ${DOCKER_NET_INT} -o ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${dst_port} -j ACCEPT
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iptables -t nat -A POSTROUTING -s ${ipaddr}/32 -d ${ipaddr}/32 -p ${dst_proto} -m ${dst_proto} --dport ${dst_port} -j MASQUERADE
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iptables_opt_src=""
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if [ ${src_ip} != "0.0.0.0" ]; then
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iptables_opt_src="-d ${src_ip}/32 "
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fi
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iptables -t nat -A DOCKER ${iptables_opt_src}! -i ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${src_port} -j DNAT --to-destination ${ipaddr}:${dst_port}
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done
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iptables_opt_src=""
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if [ ${src_ip} != "0.0.0.0" ]; then
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iptables_opt_src="-d ${src_ip}/32 "
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fi
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done
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iptables -t nat -A DOCKER ${iptables_opt_src}! -i ${DOCKER_NET_INT} -p ${dst_proto} -m ${dst_proto} --dport ${src_port} -j DNAT --to-destination ${ipaddr}:${dst_port}
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done
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fi
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done
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fi
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iptables -A DOCKER-ISOLATION -j RETURN
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iptables -t nat -I DOCKER -i ${DOCKER_INT} -j RETURN
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iptables -A DOCKER-ISOLATION-STAGE-1 -j RETURN
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iptables -A DOCKER-ISOLATION-STAGE-2 -j RETURN
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iptables -A DOCKER-USER -j RETURN
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if [ `iptables -t nat -nvL DOCKER | grep ${DOCKER_INT} | wc -l` -eq 0 ]; then
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iptables -t nat -I DOCKER -i ${DOCKER_INT} -j RETURN
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fi
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