Merge pull request chrislusf#74 from justicezyx/more

Add a test script to start a local test cluster.

etc/start_local_glow_cluster.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# Starts a test glow cluster of 1 master and 3 agents. Intends to be used in
+# tests only. Run this script in a separate shell window under the root
+# directory of the git repo. Press ctrl-c to kill all started processes.
+
+declare -r MASTER_PORT=8390
+declare -r MASTER_ADDRESS="localhost:${MASTER_PORT}"
+declare -r AGENT_PORT1=8391
+declare -r AGENT_PORT2=8392
+declare -r AGENT_PORT3=8393
+
+declare -r GLOW_BASE_DIR=/tmp/glow
+
+declare -a pids
+
+# Function to be called when user press ctrl-c.
+function ctrl_c() {
+  for pid in "${pids[@]}"
+  do
+    echo "Killing ${pid}..."
+    kill ${pid}
+
+    # This suppresses the annoying "[pid] Terminated ..." message.
+    wait ${pid} &>/dev/null
+  done
+}
+
+trap ctrl_c SIGINT
+echo "You may press ctrl-c to kill all started processes..."
+
+go build glow.go
+glow master --address="${MASTER_ADDRESS}" &>/dev/null &
+pids+=($!)
+echo "Started glow master at ${MASTER_ADDRESS}, pid: $!"
+
+glow agent --dir="${GLOW_BASE_DIR}/agent1" --max.executors=5 --memory=500 \
+  --master="${MASTER_ADDRESS}" --port="${AGENT_PORT1}" &>/dev/null &
+pids+=($!)
+echo "Started glow agent, pid: $!"
+
+glow agent --dir="${GLOW_BASE_DIR}/agent2" --max.executors=5 --memory=500 \
+  --master="${MASTER_ADDRESS}" --port="${AGENT_PORT2}" &>/dev/null &
+pids+=($!)
+echo "Started glow agent, pid: $!"
+
+glow agent --dir="${GLOW_BASE_DIR}/agent3" --max.executors=5 --memory=500 \
+  --master="${MASTER_ADDRESS}" --port="${AGENT_PORT3}" &>/dev/null &
+pids+=($!)
+echo "Started glow agent, pid: $!"
+
+echo
+echo "Sleep for 10000 seconds..."
+sleep 10000