capacity limiter and general cleanup

capsulflask/shell_scripts/capacity-avaliable.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+## check avaliable RAM and IPv4s
+
+RAM_BYTES_TO_ALLOCATE="$1"
+
+if echo "$RAM_BYTES_TO_ALLOCATE" | grep -vqE "^[0-9]+$"; then 
+  echo "RAM_BYTES_TO_ALLOCATE \"$RAM_BYTES_TO_ALLOCATE\" must be an integer"
+  exit 1
+fi
+
+#100GB
+RAM_LIMIT=100000000000
+
+## compare current allocated ram + RAM_BYTES_TO_ALLOCATE with RAM_LIMIT
+
+IPV4_LIMIT=26
+IPV4_COUNT=$(grep ip-add /var/lib/libvirt/dnsmasq/virbr1.status | wc -l)
+
+if [ $IPV4_COUNT -gt $IPV4_LIMIT ]; then
+  echo "IPv4 address limit reached"
+  exit 1
+fi
+ 
+ echo "yes"