HPC: Merge old model setup with new job submission script

hpc/hq_scripts/job.sh

@@ -6,12 +6,31 @@
 #HQ --stdout none
 #HQ --stderr none
 
-# Launch model server, send back slurm job ID
-# and wait to ensure that HQ won't schedule any more jobs to this allocation
+# Launch model server, send back server URL
+# and wait to ensure that HQ won't schedule any more jobs to this allocation.
 
-/your/model/server/call & # CHANGE ME!
+function get_avaliable_port {
+    # Define the range of ports to select from
+    MIN_PORT=1024
+    MAX_PORT=65535
+
+    # Generate a random port number
+    port=$(shuf -i $MIN_PORT-$MAX_PORT -n 1)
+
+    # Check if the port is in use
+    while lsof -Pi :$port -sTCP:LISTEN -t >/dev/null; do
+        # If the port is in use, generate a new random port number
+        port=$(shuf -i $MIN_PORT-$MAX_PORT -n 1)
+    done
 
-port=4242
+    echo $port
+}
+
+port=$(get_avaliable_port)
+export PORT=$port
+
+# Assume that server sets the port according to the environment variable 'PORT'.
+/your/model/server/call & # CHANGE ME!
 
 load_balancer_dir="/load/balancer/directory" # CHANGE ME!
 
@@ -23,6 +42,7 @@ while ! curl -s "http://$host:$port/Info" > /dev/null; do
     sleep 1
 done
 
+# Write server URL to file identified by HQ job ID.
 mkdir -p "$load_balancer_dir/urls"
 echo "http://$host:$port" > "$load_balancer_dir/urls/url-$HQ_JOB_ID.txt"