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

@@ -1,35 +1,33 @@
 #!/bin/bash
 set -e
 
-# Path to the ECS metadata file
-METADATA_FILE=$(cat "$ECS_CONTAINER_METADATA_FILE")
-
-if [ -f "$METADATA_FILE" ]; then
-    # Extract HostPrivateIPv4Address from the metadata file
-    HOST_PRIVATE_IP=$(jq -r '.HostPrivateIPv4Address' < "$METADATA_FILE")
-    if [ "$HOST_PRIVATE_IP" != "null" ]; then
-        echo "Host Private IP: $HOST_PRIVATE_IP"
-        export HOST_PRIVATE_IP
-
-        # Define the input template file and output file
-        TEMPLATE_FILE="filebeat.template.yml"
-        OUTPUT_FILE="filebeat.yml"
-
-        mkdir -p /opt/filebeat-configs/${HOST_PRIVATE_IP}
-
-        # Replace the placeholder with the actual node name and write to the output file
-        sed "s/{{HOST_PRIVATE_IP}}/${HOST_PRIVATE_IP}/g" "/opt/filebeat-configs/$TEMPLATE_FILE" > "/opt/filebeat-configs/${HOST_PRIVATE_IP}/$OUTPUT_FILE"
-        echo "Filebeat configuration file created: $OUTPUT_FILE"
-
-        # Create symlinks
-        rm -rf /usr/share/filebeat/elk
-        ln -sf "/opt/logs/${HOST_PRIVATE_IP}/elk" /usr/share/filebeat/elk
-        ln -sf "/opt/filebeat-configs/${HOST_PRIVATE_IP}/filebeat.yml" /usr/share/filebeat/filebeat.yml
-    else
-        echo "HostPrivateIPv4Address not found in metadata file"
-    fi
+# Check if ECS_CONTAINER_METADATA_FILE is set
+if [ -z "$ECS_CONTAINER_METADATA_FILE" ]; then
+  echo "ECS_CONTAINER_METADATA_FILE is not set or the server is running in local deployment environment"
+fi
+
+# Extract HostPrivateIPv4Address from the metadata file
+HOST_PRIVATE_IP=$(cat $ECS_CONTAINER_METADATA_FILE | grep -oP '(?<=HostPrivateIPv4Address": ")[^"]+')
+
+if [ "$HOST_PRIVATE_IP" != "null" ]; then
+    echo "Host Private IP: $HOST_PRIVATE_IP"
+
+    # Define the input template file and output file
+    TEMPLATE_FILE="filebeat.template.yml"
+    OUTPUT_FILE="filebeat.yml"
+
+    mkdir -p /opt/filebeat-configs/${HOST_PRIVATE_IP}
+
+    # Replace the placeholder with the actual node name and write to the output file
+    sed "s/{{HOST_PRIVATE_IP}}/${HOST_PRIVATE_IP}/g" "/opt/filebeat-configs/$TEMPLATE_FILE" > "/opt/filebeat-configs/${HOST_PRIVATE_IP}/$OUTPUT_FILE"
+    echo "Filebeat configuration file created: $OUTPUT_FILE"
+
+    # Create symlinks
+    rm -rf /usr/share/filebeat/elk
+    ln -sf "/opt/logs/${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 "Metadata file does not exist"
+    echo "HostPrivateIPv4Address not found"
 fi
 
 # Run the original filebeat entrypoint