Martynas Pumputis
2ebd358aeb
"docker.sock" is used to access Docker API which is required to: 1. subscribe to Docker events to configure-arp, 2. query Docker network info to detect whether multicast should be enabled. 3. get list of Swarm peers before starting the plugin. (1) is currently not implemented. (2) is replaced by WEAVE_MULTICAST env var which can enable multicast for all Weave networks created by the plugin (not ideal, but better than nothing). (3) is fixed by not removing "restart.sentinel".
75 lines
2.2 KiB
Bash
Executable File
75 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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set -e
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# Default if not supplied - same as weave net default
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IPALLOC_RANGE=${IPALLOC_RANGE:-10.32.0.0/12}
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HTTP_ADDR=${WEAVE_HTTP_ADDR:-127.0.0.1:6784}
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STATUS_ADDR=${WEAVE_STATUS_ADDR:-0.0.0.0:6782}
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HOST_ROOT=${HOST_ROOT:-/host}
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WEAVE_DIR="/host/var/lib/weave"
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mkdir $WEAVE_DIR || true
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echo "Starting launch.sh"
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# Check if the IP range overlaps anything existing on the host
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/usr/bin/weaveutil netcheck $IPALLOC_RANGE weave
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# We need to get a list of Swarm nodes which might run the net-plugin:
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# - In the case of missing restart.sentinel, we assume that net-plugin has started
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# for the first time via the docker-plugin cmd. So it's safe to request docker.sock.
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# - If restart.sentinel present, let weaver restore from it as docker.sock is not
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# available to any plugin in general (https://github.com/moby/moby/issues/32815).
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PEERS=
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IPALLOC_INIT=
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if [ ! -f "/restart.sentinel" ]; then
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STATUS=0
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/usr/bin/weaveutil is-swarm-manager 2>/dev/null || STATUS=$?
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if [ $STATUS -eq 0 ]; then
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IS_SWARM_MANAGER=1
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elif [ $STATUS -eq 20 ]; then
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echo "Host swarm is not \"active\"; exiting." >&2
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exit 1
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fi
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SWARM_MANAGER_PEERS=$(/usr/bin/weaveutil swarm-manager-peers)
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if [ -z "$IPALLOC_INIT" ]; then
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IPALLOC_INIT="observer"
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if [ "$IS_SWARM_MANAGER" == "1" ]; then
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IPALLOC_INIT="consensus=$(echo $SWARM_MANAGER_PEERS | wc -l)"
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fi
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fi
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PEERS=$(echo $SWARM_MANAGER_PEERS | tr '\n' ' ')
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IPALLOC_INIT="--ipalloc-init $IPALLOC_INIT"
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fi
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router_bridge_opts() {
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echo --datapath=datapath
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[ -z "$WEAVE_MTU" ] || echo --mtu "$WEAVE_MTU"
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[ -z "$WEAVE_NO_FASTDP" ] || echo --no-fastdp
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}
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multicast_opt() {
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[ -z "$WEAVE_MULTICAST" ] || echo "--plugin-v2-multicast"
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}
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exec /home/weave/weaver $EXTRA_ARGS --port=6783 $(router_bridge_opts) \
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--host-root=/host \
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--proc-path=/host/proc \
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--http-addr=$HTTP_ADDR --status-addr=$STATUS_ADDR \
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--no-dns \
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--ipalloc-range=$IPALLOC_RANGE \
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$IPALLOC_INIT \
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--nickname "$(hostname)" \
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--log-level=debug \
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--db-prefix="$WEAVE_DIR/weave" \
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--plugin-v2 \
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$(multicast_opt) \
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--plugin-mesh-socket='' \
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--docker-api='' \
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$PEERS
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