Flannel

Flannel is a simple overlay network that satisfies the Kubernetes networking requirements. It runs a small single binary agent called flanneld on each host and is responsible for allocating a subnet lease to each host out of a larger preconfigured address space. Flannel does not expose its own HTTP/REST API; it stores network configuration in either the Kubernetes API or etcd directly and is managed via configuration files, kubectl, and Helm.

1 APIs 0 Features

CNICloud NativeContainersKubernetesNetworkingOpen SourceOverlay Network

APIs

Flannel

Flannel is a simple overlay network that satisfies the Kubernetes networking requirements. It allocates subnet leases to each host and provides a layer 3 IPv4 network between mu...

Pricing Plans

Flannel Plans Pricing

3 plans

PLANS

Rate Limits

Flannel Rate Limits

5 limits

RATE LIMITS

FinOps

Flannel Finops

FINOPS

Resources

GitHubOrganization

Sources

aid: flannel
name: Flannel
description: Flannel is a simple overlay network that satisfies the Kubernetes networking requirements. It runs a small single
  binary agent called flanneld on each host and is responsible for allocating a subnet lease to each host out of a larger
  preconfigured address space. Flannel does not expose its own HTTP/REST API; it stores network configuration in either the
  Kubernetes API or etcd directly and is managed via configuration files, kubectl, and Helm.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- CNI
- Cloud Native
- Containers
- Kubernetes
- Networking
- Open Source
- Overlay Network
url: https://raw.githubusercontent.com/api-evangelist/flannel/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: flannel:flannel
  name: Flannel
  description: Flannel is a simple overlay network that satisfies the Kubernetes networking requirements. It allocates subnet
    leases to each host and provides a layer 3 IPv4 network between multiple nodes in a cluster. It is configured via the
    Kubernetes API or etcd and exposes no REST API of its own.
  humanURL: https://github.com/flannel-io/flannel
  tags:
  - CNI
  - Containers
  - Kubernetes
  - Networking
  - Overlay Network
  properties:
  - type: Documentation
    url: https://github.com/flannel-io/flannel/blob/master/Documentation/kubernetes.md
  - type: GettingStarted
    url: https://github.com/flannel-io/flannel/blob/master/Documentation/running.md
  - type: Configuration
    url: https://github.com/flannel-io/flannel/blob/master/Documentation/configuration.md
common:
- type: Website
  url: https://github.com/flannel-io/flannel
- type: Documentation
  url: https://github.com/flannel-io/flannel/blob/master/Documentation/kubernetes.md
- type: GettingStarted
  url: https://github.com/flannel-io/flannel/blob/master/Documentation/running.md
- type: GitHubOrganization
  url: https://github.com/flannel-io
- type: Helm Chart
  url: https://flannel-io.github.io/flannel/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com