README
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This document has moved to the containernetworking/cni.dev repo.
You can find it online here: https://cni.dev/plugins/current/meta/portmap/
Documentation
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Overview ¶
This is a post-setup plugin that establishes port forwarding - using iptables, from the host's network interface(s) to a pod's network interface.
It is intended to be used as a chained CNI plugin, and determines the container IP from the previous result. If the result includes an IPv6 address, it will also be configured. (IPTables will not forward cross-family).
This has one notable limitation: it does not perform any kind of reservation of the actual host port. If there is a service on the host, it will have all its traffic captured by the container. If another container also claims a given port, it will caputure the traffic - it is last-write-wins.
Source Files