Flannel

Flannel is an open-source network fabric designed for containers and microservices. It creates a virtual private network that connects all nodes in a cluster, allowing them to communicate securely and seamlessly as if they were on the same local network. Flannel works by assigning each node an IP address and managing network traffic between them, simplifying the setup of distributed systems. It is commonly used in Kubernetes environments to facilitate container networking, enabling applications to scale and communicate efficiently across multiple servers. Essentially, Flannel acts as a bridging layer, ensuring consistent and reliable network connectivity within containerized infrastructure.