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Merge pull request #2077 from weaveworks/mike/scope-script/shellcheck

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scope launch script improvements
This commit is contained in:
Mike Lang
2016-12-12 14:30:46 -08:00
committed by GitHub
parent 670d52f191 2562567de4
commit bbcf184031
1 changed files with 68 additions and 62 deletions
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scope
+68 -62
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@@ -2,27 +2,16 @@
set -eu
ARGS="$@"
usage() {
echo "Usage:"
echo "scope launch [<peer> ...]"
echo "scope stop"
echo "scope command"
echo
echo "scope <peer> is of the form <ip_address_or_fqdn>[:<port>]"
exit 1
}
ARGS="$*"
SCRIPT_VERSION="(unreleased version)"
if [ "$SCRIPT_VERSION" = "(unreleased version)" ] ; then
IMAGE_VERSION=latest
else
IMAGE_VERSION=$SCRIPT_VERSION
IMAGE_VERSION="$SCRIPT_VERSION"
fi
IMAGE_VERSION=${VERSION:-$IMAGE_VERSION}
SCOPE_IMAGE_NAME=weaveworks/scope
SCOPE_IMAGE=$SCOPE_IMAGE_NAME:$IMAGE_VERSION
SCOPE_IMAGE="$SCOPE_IMAGE_NAME:$IMAGE_VERSION"
SCOPE_CONTAINER_NAME=weavescope
SCOPE_APP_CONTAINER_NAME=weavescope-app
IP_REGEXP="[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}"
@@ -30,7 +19,32 @@ IP_ADDR_CMD="find /sys/class/net -type l | xargs -n1 basename | grep -vE 'docker
xargs -n1 ip addr show | grep inet | awk '{ print \$2 }' | grep -oE '$IP_REGEXP'"
WEAVESCOPE_DOCKER_ARGS=${WEAVESCOPE_DOCKER_ARGS:-}
[ $# -gt 0 ] || usage
usage() {
name=$(basename "$0")
cat >&2 <<-EOF
Usage:
$name launch {OPTIONS} {PEERS} - Launch Scope
$name stop - Stop Scope
$name command - Print the docker command used to start Scope
$name help - Print usage info
$name version - Print version info
PEERS are of the form HOST[:PORT]
HOST may be an ip or hostname.
PORT defaults to 4040.
Launch options:
EOF
docker run --rm -e CHECKPOINT_DISABLE --entrypoint=/home/weave/scope \
$WEAVESCOPE_DOCKER_ARGS "$SCOPE_IMAGE" -h >&2
}
usage_and_die() {
usage
exit 1
}
[ $# -gt 0 ] || usage_and_die
COMMAND=$1
shift 1
@@ -98,7 +112,7 @@ check_docker_for_mac() {
# Check that a container named $1 with image $2 is not running
check_not_running() {
case $(docker inspect --format='{{.State.Running}} {{.Config.Image}}' $1 2>/dev/null) in
case $(docker inspect --format='{{.State.Running}} {{.Config.Image}}' "$1" 2>/dev/null) in
"true $2")
echo "$1 is already running." >&2
exit 1
@@ -108,10 +122,10 @@ check_not_running() {
exit 1
;;
"false $2")
docker rm $1 >/dev/null
docker rm "$1" >/dev/null
;;
"false $2:"*)
docker rm $1 >/dev/null
docker rm "$1" >/dev/null
;;
true*)
echo "Found another running container named '$1'. Aborting." >&2
@@ -135,29 +149,29 @@ create_plugins_dir() {
# sockets do not cross VM boundaries. We need this directory to exits on the VM.
docker run --rm --entrypoint=/bin/sh \
-v /var/run:/var/run \
$SCOPE_IMAGE -c "mkdir -p /var/run/scope/plugins"
"$SCOPE_IMAGE" -c "mkdir -p /var/run/scope/plugins"
}
launch_command() {
echo docker run --privileged -d --name=$SCOPE_CONTAINER_NAME --net=host --pid=host \
echo docker run --privileged -d --name="$SCOPE_CONTAINER_NAME" --net=host --pid=host \
-v /var/run/docker.sock:/var/run/docker.sock \
-v /var/run/scope/plugins:/var/run/scope/plugins \
-e CHECKPOINT_DISABLE \
$WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE --probe.docker=true
$WEAVESCOPE_DOCKER_ARGS "$SCOPE_IMAGE" --probe.docker=true
}
launch_docker4mac_app_command() {
echo docker run -d --name=$SCOPE_APP_CONTAINER_NAME \
echo docker run -d --name="$SCOPE_APP_CONTAINER_NAME" \
-e CHECKPOINT_DISABLE \
-p 0.0.0.0:4040:4040 \
$WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE --no-probe
$WEAVESCOPE_DOCKER_ARGS "$SCOPE_IMAGE" --no-probe
}
launch() {
check_not_running $SCOPE_CONTAINER_NAME $SCOPE_IMAGE_NAME
docker rm -f $SCOPE_CONTAINER_NAME >/dev/null 2>&1 || true
CONTAINER=$($(launch_command) "$@")
echo $CONTAINER
check_not_running "$SCOPE_CONTAINER_NAME" "$SCOPE_IMAGE_NAME"
docker rm -f "$SCOPE_CONTAINER_NAME" >/dev/null 2>&1 || true
$(launch_command) "$@"
echo "Scope probe started"
}
print_app_endpoints() {
@@ -172,40 +186,32 @@ check_docker_version
case "$COMMAND" in
command)
# TODO: properly escape/quote the output of "$@"
echo $(launch_command) "$@"
# Most systems should have printf, but the %q specifier isn't mandated by posix
# and can't be guaranteed. Since this is mainly a cosmetic output and the alternative
# is not making any attempt to do escaping at all, we might as well try.
quoted=$(printf '%q ' "$@" 2>/dev/null || true)
# printf %q behaves oddly with zero args (it acts as though it recieved one empty arg)
# so we ignore that case.
if [ -z "$quoted" ] || [ $# -eq 0 ]; then
quoted="$*"
fi
echo "$(launch_command) $quoted"
;;
version)
docker run --rm -e CHECKPOINT_DISABLE --entrypoint=/home/weave/scope \
$WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE --mode=version
$WEAVESCOPE_DOCKER_ARGS "$SCOPE_IMAGE" --mode=version
;;
help)
cat >&2 <<EOF
Usage:
scope help - Print this
scope launch - Launch Scope
EOF
docker run --rm -e CHECKPOINT_DISABLE --entrypoint=/home/weave/scope \
$WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE -h
cat >&2 <<EOF
scope stop - Stop Scope
scope command - Print the docker command used to start Scope
EOF
-h|help|-help|--help)
usage
;;
launch)
# Do a dry run of scope in the foreground, so it can parse args etc
# avoiding the entrypoint script in the process.
docker run --rm -e CHECKPOINT_DISABLE --entrypoint=/home/weave/scope \
$WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE --dry-run "$@"
$WEAVESCOPE_DOCKER_ARGS "$SCOPE_IMAGE" --dry-run "$@"
if check_docker_for_mac ; then
create_plugins_dir
@@ -218,13 +224,13 @@ EOF
# access to host ports of the VM.
# - https://github.com/weaveworks/scope/issues/1411
# - https://forums.docker.com/t/ports-in-host-network-namespace-are-not-accessible/10789
check_not_running $SCOPE_APP_CONTAINER_NAME $SCOPE_IMAGE_NAME
check_not_running $SCOPE_CONTAINER_NAME $SCOPE_IMAGE_NAME
docker rm -f $SCOPE_APP_CONTAINER_NAME >/dev/null 2>&1 || true
CONTAINER=$($(launch_docker4mac_app_command) "$@")
echo $CONTAINER
check_not_running "$SCOPE_APP_CONTAINER_NAME" "$SCOPE_IMAGE_NAME"
check_not_running "$SCOPE_CONTAINER_NAME" "$SCOPE_IMAGE_NAME"
docker rm -f "$SCOPE_APP_CONTAINER_NAME" >/dev/null 2>&1 || true
$(launch_docker4mac_app_command) "$@"
echo "Scope probe started"
app_ip=$(docker inspect -f '{{.NetworkSettings.IPAddress}}' "${CONTAINER}")
docker rm -f $SCOPE_CONTAINER_NAME >/dev/null 2>&1 || true
docker rm -f "$SCOPE_CONTAINER_NAME" >/dev/null 2>&1 || true
CONTAINER=$($(launch_command --no-app "$@" "${app_ip}:4040"))
print_app_endpoints "localhost"
exit
@@ -232,27 +238,27 @@ EOF
launch "$@"
if ! check_probe_only ; then
IP_ADDRS=$(docker run --rm --net=host --entrypoint /bin/sh $SCOPE_IMAGE -c "$IP_ADDR_CMD")
IP_ADDRS=$(docker run --rm --net=host --entrypoint /bin/sh "$SCOPE_IMAGE" -c "$IP_ADDR_CMD")
print_app_endpoints $IP_ADDRS
fi
;;
stop)
[ $# -eq 0 ] || usage
if docker inspect $SCOPE_CONTAINER_NAME >/dev/null 2>&1 ; then
docker stop $SCOPE_CONTAINER_NAME >/dev/null
[ $# -eq 0 ] || usage_and_die
if docker inspect "$SCOPE_CONTAINER_NAME" >/dev/null 2>&1 ; then
docker stop "$SCOPE_CONTAINER_NAME" >/dev/null
fi
if check_docker_for_mac ; then
if docker inspect $SCOPE_APP_CONTAINER_NAME >/dev/null 2>&1 ; then
docker stop $SCOPE_APP_CONTAINER_NAME >/dev/null
if docker inspect "$SCOPE_APP_CONTAINER_NAME" >/dev/null 2>&1 ; then
docker stop "$SCOPE_APP_CONTAINER_NAME" >/dev/null
fi
fi
;;
*)
echo "Unknown scope command '$COMMAND'" >&2
usage
usage_and_die
;;
esac