Plugins Overview

These are general-purpose CNI network plugins maintained by the containernetworking team. For more information, see the individual plugin pages.

Reference plugins:

Main: interface-creating

• bridge : Creates a bridge, adds the host and the container to it.
• ipvlan : Adds an ipvlan interface in the container.
• macvlan : Creates a new MAC address, forwards all traffic to that to the container.
• ptp : Creates a veth pair.
• host-device : Move an already-existing device into a container.

Windows: windows specific

• win-bridge : Creates a bridge, adds the host and the container to it.
• win-overlay : Creates an overlay interface to the container.

IPAM: IP address allocation

• dhcp : Runs a daemon on the host to make DHCP requests on behalf of the container
• host-local : Maintains a local database of allocated IPs
• static : Allocate a static IPv4/IPv6 addresses to container and it’s useful in debugging purpose.

Meta: other plugins

• flannel : Generates an interface corresponding to a flannel config file
• tuning : Tweaks sysctl parameters of an existing interface
• portmap : An iptables-based portmapping plugin. Maps ports from the host’s address space to the container.
• bandwidth : Allows bandwidth-limiting through use of traffic control tbf (ingress/egress).
• sbr : A plugin that configures source based routing for an interface (from which it is chained).
• firewall : A firewall plugin which uses iptables or firewalld to add rules to allow traffic to/from the container.

Sample

The sample plugin provides an example for building your own plugin.

Contact

For any questions about CNI, please reach out via:

• Email: cni-dev
• Slack: #cni on the CNCF slack .

If you have a security issue to report, please do so privately to the email addresses listed in the OWNERS file.