Songmin Li
d61e7e5e1f
The dhcp server is systemd-networkd, and the dhcp plugin can request an ip but can not renew it. The systemd-networkd just ignore the renew request. ``` 2024/09/14 21:46:00 no DHCP packet received within 10s 2024/09/14 21:46:00 retrying in 31.529038 seconds 2024/09/14 21:46:42 no DHCP packet received within 10s 2024/09/14 21:46:42 retrying in 63.150490 seconds 2024/09/14 21:47:45 98184616c91f15419f5cacd012697f85afaa2daeb5d3233e28b0ec21589fb45a/iot/eth1: no more tries 2024/09/14 21:47:45 98184616c91f15419f5cacd012697f85afaa2daeb5d3233e28b0ec21589fb45a/iot/eth1: renewal time expired, rebinding 2024/09/14 21:47:45 Link "eth1" down. Attempting to set up 2024/09/14 21:47:45 98184616c91f15419f5cacd012697f85afaa2daeb5d3233e28b0ec21589fb45a/iot/eth1: lease rebound, expiration is 2024-09-14 22:47:45.309270751 +0800 CST m=+11730.048516519 ``` Follow the https://datatracker.ietf.org/doc/html/rfc2131#section-4.3.6, following options must not be sent in renew - Requested IP Address - Server Identifier Since the upstream code has been inactive for 6 years, we should switch to another dhcpv4 library. The new selected one is https://github.com/insomniacslk/dhcp. Signed-off-by: Songmin Li <lisongmin@protonmail.com>
Plugins
Some CNI network plugins, maintained by the containernetworking team. For more information, see the CNI website.
Read CONTRIBUTING for build and test instructions.
Plugins supplied:
Main: interface-creating
bridge: Creates a bridge, adds the host and the container to it.ipvlan: Adds an ipvlan interface in the container.loopback: Set the state of loopback interface to up.macvlan: Creates a new MAC address, forwards all traffic to that to the container.ptp: Creates a veth pair.vlan: Allocates a vlan device.host-device: Move an already-existing device into a container.dummy: Creates a new Dummy device in the 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 containerhost-local: Maintains a local database of allocated IPsstatic: Allocate a single static IPv4/IPv6 address to container. It's useful in debugging purpose.
Meta: other plugins
tuning: Tweaks sysctl parameters of an existing interfaceportmap: 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.