Update install.sh to allow dpdk limits configuration (#546)

(cherry picked from commit d41110e)

dist/images/install.sh

@@ -39,12 +39,16 @@ VLAN_RANGE="1,4095"
 DPDK="false"
 DPDK_SUPPORTED_VERSIONS=("19.11")
 DPDK_VERSION=""
+DPDK_CPU="1000m"                        # Default CPU configuration for if --dpdk-cpu flag is not included
+DPDK_MEMORY="2Gi"                       # Default Memory configuration for it --dpdk-memory flag is not included
 
 display_help() {
     echo "Usage: $0 [option...]"
     echo
     echo "  -h, --help               Print Help (this message) and exit"
     echo "  --with-dpdk=<version>    Install Kube-OVN with OVS-DPDK instead of kernel OVS"
+    echo "  --dpdk-cpu=<amount>m     Configure DPDK to use a specific amount of CPU"
+    echo "  --dpdk-memory=<amount>Gi Configure DPDK to use a specific amount of memory"
     echo
     exit 0
 }
@@ -66,6 +70,26 @@ then
           exit 1
         fi
       ;;
+      --dpdk-cpu=*)
+        DPDK_CPU="${1#*=}"
+        if [[ $DPDK_CPU =~ ^[0-9]+(m)$ ]]
+        then
+           echo "CPU $DPDK_CPU"
+        else
+           echo "$DPDK_CPU is not valid, please use the format --dpdk-cpu=<amount>m"
+           exit 1
+        fi
+      ;;
+      --dpdk-memory=*)
+        DPDK_MEMORY="${1#*=}"
+        if [[ $DPDK_MEMORY =~ ^[0-9]+(Gi)$ ]]
+        then
+           echo "MEMORY $DPDK_MEMORY"
+        else
+           echo "$DPDK_MEMORY is not valid, please use the format --dpdk-memory=<amount>Gi"
+           exit 1
+        fi
+      ;;
       -?*)
         echo "Unknown argument $1"
         exit 1
@@ -708,11 +732,11 @@ spec:
             timeoutSeconds: 45
           resources:
             requests:
-              cpu: 500m
-              memory: 2Gi
+              cpu: $DPDK_CPU
+              memory: $DPDK_MEMORY
             limits:
-              cpu: 1000m
-              memory: 2Gi
+              cpu: $DPDK_CPU
+              memory: $DPDK_MEMORY
               hugepages-1Gi: 1Gi
       nodeSelector:
         kubernetes.io/os: "linux"