What is the process for transmitting multiple log files to a container on a k8s cluster with filebeat?

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The process for transmitting multiple log files to a container on a k8s cluster with filebeat would involve the following steps:

1. Configure filebeat on each node in the cluster: Install and configure filebeat on each node where your Kubernetes pods are running.

2. Create a custom configuration file: Create a custom filebeat configuration file to specify which log files you want to send to the container, such as /var/log/*.log. This can be done by creating a filebeat.yml file.

3. Create a configmap: Create a Kubernetes ConfigMap to hold the filebeat configuration file. This can be done by executing the following command:

   kubectl create configmap filebeat-config --from-file=filebeat.yml
   

4. Mount the configmap as a volume: In your pod definition, you need to mount the ConfigMap as a volume so that the filebeat daemon can access the filebeat configuration file.

5. Create a filebeat Docker image: Create a Docker image that includes filebeat and your custom configuration file. The Docker image should be based on the official filebeat image.

6. Deploy the filebeat pod: Create a Kubernetes deployment or StatefulSet for the filebeat pod that uses the filebeat Docker image. This will create a pod on each node in the cluster.

7. Create a sidecar container: Create a sidecar container that will be used to receive the logs from filebeat and send them to your log aggregation service.

8. Configure the sidecar container: The sidecar container should be configured to receive logs on a specific port and mount a volume that is shared with filebeat. This can be done by creating a Docker image that includes the sidecar container and your specific configuration.

9. Modify deployment YAML: Modify the deployment YAML for the main container to include the sidecar container.

10. Deploy the pod: Once the deployment YAML is updated, deploy the pod to the cluster.