repo: added new directory where utils scripts will be

Added as a complement two scripts:

- one configVxlans.sh takes the file from config/switchConfig.json and initiates the configuration in each switch in the cluster
- generateConfig.sh generates a sample file in switchConfig.sh, interconnecting all nodes with all

hack/configVxlans.sh

+#!/bin/bash
+
+# Path to the configuration file
+configFilePath="./configs/switchConfig.json"
+
+# Use kubectl to get pods and grep for those starting with 'l2sm-switch'
+# Then, use awk to extract the pod name and node name by matching an IP pattern and taking the next column as the node
+mapfile -t podInfo < <(kubectl get pods -o wide | grep 'l2sm-switch' | awk '{for (i=1; i<=NF; i++) { if ($i ~ /^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$/) { print $1 ":" $(i+1); break; } }}')
+
+# Declare an associative array to store pod names and their respective nodes
+declare -A pods
+
+# Fill the associative array with pod names as keys and node names as values
+for entry in "${podInfo[@]}"
+do
+  podName="${entry%%:*}"
+  nodeName="${entry##*:}"
+  pods["$podName"]=$nodeName
+done
+
+# Loop through the array
+for pod in "${!pods[@]}"
+do
+  nodeName=${pods[$pod]}
+
+  # Copy the configuration file to the pod
+  echo "Copying config file to $pod..."
+  kubectl cp "$configFilePath" "$pod:/etc/l2sm/switchConfig.json"
+
+  # Execute the script inside the pod
+  echo "Executing configuration script on $pod..."
+  kubectl exec -it "$pod" -- /bin/bash -c "l2sm-vxlans --node_name=$nodeName /etc/l2sm/switchConfig.json"
+done
+
+echo "Configuration deployment completed."

hack/generateConfig.sh

+#!/bin/bash
+
+# Filename for the JSON config
+jsonConfigPath="./configs/switchConfig.json"
+
+# Use kubectl to get pods, grep for those starting with 'l2sm-switch', and parse with awk
+mapfile -t podInfo < <(kubectl get pods -o wide | grep 'l2sm-switch' | awk '{for (i=1; i<=NF; i++) { if ($i ~ /^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$/) { print $(i+1) ":" $i; break; } }}')
+
+# Associative array to store node names and their respective IPs
+declare -A nodeIPs
+
+# Fill the associative array with node names as keys and IPs as values
+for entry in "${podInfo[@]}"
+do
+  nodeName="${entry%%:*}"
+  nodeIP="${entry##*:}"
+  nodeIPs["$nodeName"]=$nodeIP
+done
+
+# Prepare Nodes array
+nodesArray=()
+for nodeName in "${!nodeIPs[@]}"
+do
+  nodesArray+=("{\"name\": \"$nodeName\", \"nodeIP\": \"${nodeIPs[$nodeName]}\"}")
+done
+
+# Prepare Links array
+linksArray=()
+declare -A linkPairs
+for srcNode in "${!nodeIPs[@]}"
+do
+  for dstNode in "${!nodeIPs[@]}"
+  do
+    if [[ "$srcNode" != "$dstNode" && -z ${linkPairs["$srcNode:$dstNode"]} && -z ${linkPairs["$dstNode:$srcNode"]} ]]; then
+      linksArray+=("{\"endpointA\": \"$srcNode\", \"endpointB\": \"$dstNode\"}")
+      linkPairs["$srcNode:$dstNode"]=1
+    fi
+  done
+done
+
+# Generate JSON output
+echo "{
+  \"Nodes\": [
+    $(IFS=,; echo "${nodesArray[*]}")
+  ],
+  \"Links\": [
+    $(IFS=,; echo "${linksArray[*]}")
+  ]
+}" > $jsonConfigPath
+
+echo "Network topology configuration has been generated at $jsonConfigPath."