FluentD Examples

FluentD is a data collector for unified logging layer. These examples cover various runtime environments and deployment scenarios, from simple setups to complex multi-platform configurations.

Simple Deployment

Basic FluentD configuration suitable for most Kubernetes environments:

fluentd-simple-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

Container Runtime Configurations

Docker Runtime

Standard Docker environment configuration:

fluentd-docker-runtime-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

# Cloud containers runtime software. Possible values: docker/cri-o/containerd. In fact so far he differ docker and non-docker environments
containerRuntimeType: docker

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

Containerd Runtime

Configuration optimized for containerd container runtime:

fluentd-containerd-runtime-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

# Cloud containers runtime software. Possible values: docker/cri-o/containerd. In fact so far he differ docker and non-docker environments
containerRuntimeType: containerd

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

OpenShift with Containerd

OpenShift-specific configuration with containerd runtime:

fluentd-openshift-containerd-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

# Cloud containers runtime software. Possible values: docker/cri-o/containerd. In fact so far he differ docker and non-docker environments
containerRuntimeType: containerd

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

Operating System Specific

CentOS with Docker

Optimized configuration for CentOS-based Docker environments:

fluentd-centos-docker-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

# Operating system kind on cloud nodes: centos/rhel/oracle/ubuntu
osKind: centos

# Cloud containers runtime software. Possible values: docker/cri-o/containerd. In fact so far he differ docker and non-docker environments
containerRuntimeType: docker

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

Ubuntu with Containerd

Configuration tailored for Ubuntu systems with containerd:

fluentd-ubuntu-containerd-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

# Operating system kind on cloud nodes: centos/rhel/oracle/ubuntu
osKind: ubuntu

# Cloud containers runtime software. Possible values: docker/cri-o/containerd. In fact so far he differ docker and non-docker environments
containerRuntimeType: containerd

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

Advanced Configurations

Custom Input and Filter

Advanced configuration with custom input sources and filtering rules:

fluentd-custom-input-filter-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  # Custom FluentD configurations
  customInputConf: |-
    <source>
      custom_input_configuration
    </source>
  customFilterConf: |-
    <filter raw.kubernetes.var.log.**>
      custom_filter_configuration
    </filter>

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

Node Selector Deployment

Targeted deployment using node selectors:

fluentd-with-node-selector-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

fluentd:
  install: true

  graylogHost: 1.2.3.4
  graylogPort: 12201

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

  nodeSelectorKey: kubernetes.io/os
  nodeSelectorValue: linux

Without Graylog Output

Configuration for alternative output destinations:

fluentd-without-graylog-output-values.yaml

# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

fluentd:
  install: true

  # Disable Graylog output
  graylogOutput: false

  customOutputConf: |-
    <store ignore_error>
      custom_output_configuration
    </store>

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      cpu: 500m
      memory: 512Mi

Key Configuration Parameters

Parameter	Description	Values
fluentd.install	Enable FluentD deployment	true/false
fluentd.graylogHost	Graylog server hostname/IP	Hostname or IP
fluentd.graylogPort	Graylog input port	Port number (default: 12201)
fluentd.resources	Resource requests and limits	CPU/Memory specifications
fluentd.nodeSelector	Node selection criteria	Key-value pairs
containerRuntimeType	Container runtime type	docker/cri-o/containerd
osKind	Operating system type	centos/rhel/oracle/ubuntu

Use Cases

• Simple Deployment: Standard Kubernetes clusters with basic logging needs
• Container Runtime Specific: Environments with specific container runtime requirements
• OS-Specific: Optimized configurations for different operating systems
• Custom Processing: Advanced log processing and routing requirements
• Node Targeting: Specific node deployment requirements
• Alternative Outputs: Non-Graylog output destinations