Fluent-bit : Use Kubelet_Host and avoid enabling host networking

[madappa-sharath]

fluent/fluent-bit#5143 added ability to communicate over host's IP and avoid using host networking feature. This a secure way where in network policies will be respected. The fluent-bit daemonset manifests at https://github.com/aws-samples/amazon-cloudwatch-container-insights/tree/main/k8s-deployment-manifest-templates/deployment-mode/daemonset/container-insights-monitoring/fluent-bit needs to be updated to use Kubelet_Host and disable host networking.

[FILTER]
    Name          kubernetes
    Match         kube.*
    Use_Kubelet   true
    Kubelet_Host  ${KUBELET_HOST}

apiVersion: apps/v1
kind: DaemonSet
metadata:
 name: fluent-bit
spec:
 template:
   spec:
     hostNetwork: false
     containers:
     - name: fluent-bit
        image: fluent/fluent-bit
        env:
        - name: KUBELET_HOST
           valueFrom:
             fieldRef:
               fieldPath: status.hostIP