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Attempt to get rules matching what the docker daemon produces with regard to bridges

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This commit is contained in:
David Snopek 2016-11-09 08:46:49 -06:00
parent fabdd8010b
commit 1d69597f6b
1 changed files with 19 additions and 12 deletions
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31
docker.sh
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@ -1,4 +1,4 @@
#!/bin/sh
#!/bin/bash
export PATH="$PATH:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
@ -27,10 +27,7 @@ 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
iptables -A DOCKER-ISOLATION -i ${int_in} -o ${int_out} -j DROP
}
DOCKER_INT="docker0"
@ -52,6 +49,22 @@ 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 POSTROUTING -s ${DOCKER_NETWORK} ! -o ${DOCKER_INT} -j MASQUERADE
bridges=`docker network ls -q --filter='Driver=bridge'`
for bridge in $bridges; do
DOCKER_NET_INT="br-$(echo $bridge | cut -c -12)"
subnet=`docker network inspect -f '{{(index .IPAM.Config 0).Subnet}}' $bridge`
iptables -t nat -A POSTROUTING -s ${subnet} ! -o ${DOCKER_NET_INT} -j MASQUERADE
iptables -t nat -A DOCKER -i ${DOCKER_NET_INT} -j RETURN
for other_bridge in $bridges; do
if [ $other_bridge != $bridge ]; then
add_to_docker_isolation br-$bridge br-$other_bridge
fi
done
done
containers=`docker ps -q`
if [ `echo ${containers} | wc -c` -gt "1" ]; then
@ -62,18 +75,12 @@ if [ `echo ${containers} | wc -c` -gt "1" ]; then
DOCKER_NET_INT=${DOCKER_INT}
ipaddr=`docker inspect -f "{{.NetworkSettings.IPAddress}}" ${container}`
else
DOCKER_NET_INT="br-$(docker inspect -f \"{{.NetworkSettings.Networks.${netmode}.NetworkID}}\" ${container} | cut -c -12)"
DOCKER_NET_INT=br-$(docker inspect -f "{{.NetworkSettings.Networks.${netmode}.NetworkID}}" ${container} | cut -c -12)
ipaddr=`docker inspect -f "{{.NetworkSettings.Networks.${netmode}.IPAddress}}" ${container}`
add_to_docker_isolation ${DOCKER_NET_INT} ${DOCKER_INT}
add_to_docker_isolation ${DOCKER_INT} ${DOCKER_NET_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