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https://github.com/weaveworks/scope.git
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Merge pull request #302 from weaveworks/scope-on-weave
weave expose prior to scope launch
This commit is contained in:
Peter Bourgon
134
scope
134
scope
@@ -19,13 +19,15 @@ else
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fi
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IMAGE_VERSION=${VERSION:-$IMAGE_VERSION}
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SCOPE_IMAGE=weaveworks/scope:$IMAGE_VERSION
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CONTAINER_NAME=weavescope
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SCOPE_CONTAINER_NAME=weavescope
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WEAVE_CONTAINER_NAME=weave
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DNS_CONTAINER_NAME=weavedns
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DNS_HTTP_PORT=6785
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HOSTNAME=scope
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DOMAINNAME=weave.local
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FQDN=$HOSTNAME.$DOMAINNAME
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DOCKER_BRIDGE=${DOCKER_BRIDGE:-docker0}
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WEAVE=$(which weave)
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IP_REGEXP="[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}"
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IP_ADDR_CMD="find /sys/class/net -type l | xargs -n1 basename | grep -vE 'docker|veth|lo' | \
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xargs -n1 ip addr show | grep inet | awk '{ print \$2 }' | grep -oE '$IP_REGEXP'"
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@@ -37,8 +39,8 @@ WEAVESCOPE_DNS_ARGS=${WEAVESCOPE_DNS_ARGS:-}
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COMMAND=$1
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shift 1
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dns_running() {
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status=$(docker inspect --format='{{.State.Running}}' $DNS_CONTAINER_NAME 2>/dev/null) && [ "$status" = "true" ]
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is_running() {
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status=$(docker inspect --format='{{.State.Running}}' $1 2>/dev/null) && [ "$status" = "true" ]
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return $?
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}
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@@ -70,31 +72,40 @@ check_not_running() {
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esac
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}
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docker_bridge_ip() {
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DOCKER_BRIDGE_IP=$(ip -4 addr show dev $DOCKER_BRIDGE | grep -m1 -o 'inet [.0-9]*')
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DOCKER_BRIDGE_IP=${DOCKER_BRIDGE_IP#inet }
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}
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# Perform operation $1 on local DNS database, for container ID $2
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# with FQDN $3, at addresses $4, $5 ... This function is only called
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# where we know $2 is a valid container name
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tell_dns_fqdn() {
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METHOD="$1"
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CONTAINER_ID="$2"
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CONTAINER_FQDN="$3"
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shift 3
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if ! dns_running; then
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# weavedns not running - silently return
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# Run `weave expose` if it's not already exposed.
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weave_expose() {
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if [ "$WEAVE" == "" ]; then
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echo "weave command not found. Not placing Scope on Weave network." >&2
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return
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fi
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# get the long form of the container ID
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CONTAINER=$(docker inspect --format='{{.Id}}' $CONTAINER_ID 2>/dev/null)
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MORE_ARGS="--data-urlencode fqdn=$CONTAINER_FQDN"
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for ADDR; do
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http_call $DNS_CONTAINER_NAME $DNS_HTTP_PORT $METHOD /name/$CONTAINER/${ADDR%/*} $MORE_ARGS || true
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status=$($WEAVE ps weave:expose | awk '{print $3}' 2>/dev/null)
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if [ "$status" == "" ]; then
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$WEAVE expose
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fi
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}
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# Add all Scope IPs to its DNS record.
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weave_dns_add() {
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CONTAINER_ID="$1"
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CONTAINER_FQDN="$2"
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shift 2
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if [ "$WEAVE" == "" ]; then
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echo "weave command not found. Not adding Scope to Weave DNS." >&2
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return
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fi
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for ip in $*; do
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$WEAVE dns-add $ip $CONTAINER_ID -h $CONTAINER_FQDN
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done
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}
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set_docker_bridge_ip() {
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DOCKER_BRIDGE_IP=$(ip -4 addr show dev $DOCKER_BRIDGE | grep -m1 -o 'inet [.0-9]*')
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DOCKER_BRIDGE_IP=${DOCKER_BRIDGE_IP#inet }
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}
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# Call url $4 with http verb $3 on container $1 at port $2
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http_call() {
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container_ip $1 \
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@@ -136,48 +147,53 @@ container_ip() {
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case "$COMMAND" in
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launch)
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check_not_running $CONTAINER_NAME $SCOPE_IMAGE
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launch)
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check_not_running $SCOPE_CONTAINER_NAME $SCOPE_IMAGE
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# If WeaveDNS is running, we want to automatically tell the scope
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# image to use weave dns. We can't use --dns with --net=host, so we have to hack it.
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if dns_running; then
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docker_bridge_ip
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WEAVESCOPE_DNS_ARGS="$WEAVESCOPE_DNS_ARGS --dns $DOCKER_BRIDGE_IP --searchpath $DOMAINNAME"
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fi
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# If Weave is running, we want to expose a Weave IP to the host
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# network namespace, so Scope can use it.
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weave_expose
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CONTAINER=$(docker run --privileged -d --name=$CONTAINER_NAME --net=host --pid=host \
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-v /var/run/docker.sock:/var/run/docker.sock \
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$WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE $WEAVESCOPE_DNS_ARGS "$@")
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# If WeaveDNS is running, we want to automatically tell the scope
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# image to use weave dns. We can't use --dns with --net=host, so we
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# have to hack it.
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if is_running $DNS_CONTAINER_NAME; then
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set_docker_bridge_ip
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WEAVESCOPE_DNS_ARGS="$WEAVESCOPE_DNS_ARGS --dns $DOCKER_BRIDGE_IP --searchpath $DOMAINNAME"
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fi
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IP_ADDRS=$(docker run --net=host gliderlabs/alpine /bin/sh -c "$IP_ADDR_CMD")
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if dns_running; then
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if [ -z "$IP_ADDRS" ]; then
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echo "Could not determine local IP address; Weave DNS integration will not work correctly."
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exit 1
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fi
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tell_dns_fqdn PUT $CONTAINER $FQDN $IP_ADDRS
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fi
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CONTAINER=$(docker run --privileged -d --name=$SCOPE_CONTAINER_NAME --net=host --pid=host \
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-v /var/run/docker.sock:/var/run/docker.sock \
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$WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE $WEAVESCOPE_DNS_ARGS "$@")
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echo $CONTAINER
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IP_ADDRS=$(docker run --net=host gliderlabs/alpine /bin/sh -c "$IP_ADDR_CMD")
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if is_running $DNS_CONTAINER_NAME; then
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if [ -z "$IP_ADDRS" ]; then
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echo "Could not determine local IP address; Weave DNS integration will not work correctly."
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exit 1
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fi
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weave_dns_add $CONTAINER $FQDN $IP_ADDRS
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fi
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echo "Weave Scope is reachable at the following URL(s):" >&2
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for ip in $IP_ADDRS; do
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echo " * http://$ip:4040/" >&2
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done
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;;
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echo $CONTAINER
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stop)
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[ $# -eq 0 ] || usage
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if ! docker stop $CONTAINER_NAME >/dev/null 2>&1 ; then
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echo "Weave Scope is not running." >&2
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fi
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docker rm -f $CONTAINER_NAME >/dev/null 2>&1 || true
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;;
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echo "Weave Scope is reachable at the following URL(s):" >&2
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for ip in $IP_ADDRS; do
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echo " * http://$ip:4040/" >&2
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done
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;;
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*)
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echo "Unknown scope command '$COMMAND'" >&2
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usage
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;;
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stop)
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[ $# -eq 0 ] || usage
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if ! docker stop $SCOPE_CONTAINER_NAME >/dev/null 2>&1 ; then
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echo "Weave Scope is not running." >&2
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fi
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docker rm -f $SCOPE_CONTAINER_NAME >/dev/null 2>&1 || true
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;;
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*)
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echo "Unknown scope command '$COMMAND'" >&2
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usage
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;;
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esac
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