fluent-bit

Fluent Bit is a fast and lightweight log processor and forwarder for Linux, OSX and BSD family operating systems. The Fluent Bit Helm chart automates deployment and configuration of Fluent Bit in Kubernetes clusters using Minimus images.

Prerequisites

A subscription to the Minimus images included in the chart
A running Kubernetes cluster (v1.21 or higher is recommended)
kubectl installed and configured
Helm v3.8 or higher for OCI support (Installation instructions)
Cluster Admin privileges

Note: Fluent Bit runs as a DaemonSet by default, deploying one pod on each node. Ensure your nodes have sufficient resources for the log collection workload.

Try It Out

In this example we will deploy Fluent Bit on a Kubernetes cluster using the Minimus Fluent Bit Helm chart. Fluent Bit will collect and forward logs from all nodes in the cluster.

Step 1: Start Cluster

If you have a cluster to work with, skip this step. Otherwise, start a Minikube cluster. Deployment instructions

Step 2: Create Namespace

Create a namespace:

kubectl create ns fluent-bit

Step 3: Deploy the Helm Chart

Deploy the Minimus Helm chart:

helm install my-fluent-bit oci://helm.mini.dev/fluent-bit \
  --version 0.58.3 \
  -n fluent-bit \
  --wait

If you want to override the chart's defaults, go to the Values tab, save a copy locally with your changes. Deploy the chart with your overrides using -f values.yaml:

helm install my-fluent-bit oci://helm.mini.dev/fluent-bit \
  --version 0.58.3 \
  -f values.yaml \
  -n fluent-bit \
  --wait

Step 4: Verify Fluent Bit is Running

Confirm the chart deployed successfully and Fluent Bit started:

kubectl get pods -n fluent-bit

You should see output similar to (one pod per node):

NAME                    READY   STATUS    RESTARTS   AGE
my-fluent-bit-xxxxx     1/1     Running   0          1m

Step 5: Check Fluent Bit Health

Port-forward to the Fluent Bit service to check the health endpoint:

kubectl port-forward svc/my-fluent-bit -n fluent-bit 2020:2020

Then verify that the health endpoint responds:

curl http://localhost:2020/api/v2/health

Step 6: Clean Up

Uninstall the chart and delete the namespace to remove all resources:

helm uninstall my-fluent-bit -n fluent-bit
kubectl delete namespace fluent-bit

Terms & Info

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