run-flux

#!/bin/bash

set -eo pipefail

DAEMON_IMAGE=weaveworks/fluxd
DEFAULT_ETCD="http://127.0.0.1:2379"

start() {
    if [[ -z "$ETCD_ADDRESS" ]]; then
        echo "WARNING: no environment entry for ETCD_ADDRESS; using $DEFAULT_ETCD"  >&2
        ETCD_ADDRESS="$DEFAULT_ETCD"
    fi

    if [[ -z "$HOST_IP" ]]; then
        hostip=$(hostname -i)
        echo "WARNING: no environment entry for HOST_IP; used \`hostname -i\` to obtain $hostip" >&2
        HOST_IP="$hostip"
    fi

    export HOST_IP ETCD_ADDRESS

    docker run -d --name "fluxd" -e HOST_IP -e ETCD_ADDRESS \
            -v "/var/run/docker.sock:/var/run/docker.sock" \
            --cap-add=NET_ADMIN --net=host "$DAEMON_IMAGE" \
            --listen-prometheus :9000 --advertise-prometheus $HOST_IP:9000
}

stop() {
    docker rm -f "fluxd" 2>/dev/null || true
}

usage() {
    cat >&2 <<EOF
Usage:

  run-flux start|stop|restart
EOF
}

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
    *)
        usage
        ;;
esac