Remove jq usage

Dockerfile

@@ -3,9 +3,6 @@ FROM docker.elastic.co/beats/filebeat:8.2.0
 # Switch to root user
 USER root
 
-#install jq to the container
-RUN apt-get update && apt-get install -y jq
-
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 RUN chmod +x /usr/local/bin/entrypoint.sh
 

entrypoint.sh

@@ -1,15 +1,16 @@
 #!/bin/bash
 set -e
 
-# Path to the ECS metadata file
-METADATA_FILE=$(cat "$ECS_CONTAINER_METADATA_FILE")
+# Check if ECS_CONTAINER_METADATA_FILE is set
+if [ -z "$ECS_CONTAINER_METADATA_FILE" ]; then
+  echo "ECS_CONTAINER_METADATA_FILE is not set or the server is running in local deployment environment"
+fi
 
-if [ -f "$METADATA_FILE" ]; then
 # Extract HostPrivateIPv4Address from the metadata file
-    HOST_PRIVATE_IP=$(jq -r '.HostPrivateIPv4Address' < "$METADATA_FILE")
+HOST_PRIVATE_IP=$(cat $ECS_CONTAINER_METADATA_FILE | grep -oP '(?<=HostPrivateIPv4Address": ")[^"]+')
+
 if [ "$HOST_PRIVATE_IP" != "null" ]; then
     echo "Host Private IP: $HOST_PRIVATE_IP"
-        export HOST_PRIVATE_IP
 
     # Define the input template file and output file
     TEMPLATE_FILE="filebeat.template.yml"
@@ -26,10 +27,7 @@ if [ -f "$METADATA_FILE" ]; then
     ln -sf "/opt/logs/${HOST_PRIVATE_IP}/elk" /usr/share/filebeat/elk
     ln -sf "/opt/filebeat-configs/${HOST_PRIVATE_IP}/filebeat.yml" /usr/share/filebeat/filebeat.yml
 else
-        echo "HostPrivateIPv4Address not found in metadata file"
-    fi
-else
-    echo "Metadata file does not exist"
+    echo "HostPrivateIPv4Address not found"
 fi
 
 # Run the original filebeat entrypoint