Adam Harrison
034d8933c0
Multiweave now creates a temporary bridge with an IP alias per router in the host netns, and overrides the router to bind to that specific IP for weave protocol and data traffic and http control.
69 lines
2.0 KiB
Bash
Executable File
69 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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set -e
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# You may need to adjust
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# echo 4096 >/proc/sys/net/ipv4/neigh/default/gc_thresh3
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# where the number is greater than NUM_WEAVES*(NUM_WEAVES-1) plus some
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# fudge.
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#
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# Without that, some connections between the weaves may fail to get
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# established, and networking on the host in general becomes
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# broken. There will also be some "net_ratelimit: nnn callbacks
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# suppressed" messages in the syslog.
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START=${FIRST_WEAVE:-1}
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COUNT=${NUM_WEAVES:-28}
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FINISH=$((START+COUNT-1))
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SUBNET=192.168.7
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weavedir=$(dirname $0)/..
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# Generate a random MAC value - copied from 'weave' script
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random_mac() {
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# In the first byte of the MAC, the 'multicast' bit should be
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# clear and 'locally administered' bit should be set. All other
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# bits should be random.
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od -txC -An -N6 /dev/urandom | ( read a b c d e f && printf "%02x:$b:$c:$d:$e:$f" $((0x$a & ~1 | 2)) )
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}
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weave() {
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i=$1
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shift
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WEAVE_CONTAINER_NAME=weave$i WEAVE_HTTP_ADDR=$SUBNET.$i:6784 $weavedir/weave "$@"
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}
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case "$1" in
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launch)
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shift 1
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echo $(date -R) launching
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ip link show multiweave >/dev/null 2>&1 || sudo ip link add name multiweave type bridge
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for i in $(seq $START $FINISH); do
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IP=$SUBNET.$i
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sudo ip addr add $IP/24 dev multiweave
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weave $i launch-router --datapath '' --iface '' --no-dns --host $IP \
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--name $(random_mac) --nickname weave$i "$@"
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done
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echo $(date -R) connecting
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[ $START -gt 1 ] || START=2
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for i in $(seq $START $FINISH); do
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TO=$SUBNET.$((i-1))
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echo connecting weave$i to $TO
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weave $i connect $TO
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done
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echo $(date -R) done
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;;
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stop)
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for i in $(seq $FINISH -1 $START); do
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IP=$SUBNET.$i
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echo Stopping weave$i
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weave $i stop-router
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sudo ip addr del $IP/24 dev multiweave || true
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done
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[ -z "$(ip -4 -o addr show multiweave)" ] && sudo ip link del multiweave
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;;
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*)
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weave "$@"
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;;
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esac
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