Create a script that spins up multiple nodes listening for requests o…

…n different ports (#8)

* Make spindown script
* Iterate through the ports and create a port address list
* Finish the spin down script
* Final cleanup with SIGTERM
* Finish account for bound ports
* Finish implementing spin down script spinning down based on port_list.txt

---------

Co-authored-by: Nghi Nguyen <quangnghiams@gmail.com>

.gitignore

@@ -89,3 +89,5 @@ ENV/
 # Rope project settings
 .ropeproject
 
+# Spin up script
+devops/deploy/port_list.txt

devops/deploy/spin-down-script.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Now fully implemented spinning down through the port_list.txt
+IP=127.0.0.1
+declare -a PORTS=()
+while IFS= read -r line
+do
+	PORTS+=("$line")
+done < "port_list.txt"
+
+# Iterate through the list, killing each controlling process while looping
+for port in ${PORTS[*]}
+do
+	echo "Killing processes at $IP:$port"
+	temp=$IP:$port
+	kill -15 $(netstat -anp | grep $temp | awk '{print $6}' | awk -F/ '{print $1}')
+done
+
+echo -n > "port_list.txt"

devops/deploy/spin-up-script.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+PSTART=${1:-50000}
+PEND=${2:-50050}
+# Just a basic script to spin up listening servers on different ports in dynamic port range
+IP=127.0.0.1
+COUNT=0
+((NUM_PORTS=${PEND}-${PSTART}))
+
+echo "Total number of ports: $NUM_PORTS"
+export PYTHONPATH=../../src/main/py
+
+port=$PSTART
+
+while [ ${COUNT} -lt ${NUM_PORTS} ]
+do
+  #Check for Open ports, if open then OK, else continue
+  if ! netstat -apn | grep -q "$IP:$port" 
+  then
+    echo "Starting on port $port"
+    python3 -m sample_module.udp_server ${port} &
+    echo "$port" >> port_list.txt
+    ((port++))
+    ((COUNT++))
+  else
+    echo "Port $port already bound"
+    ((port++))
+  fi
+done