135292e050
Making sure the exec'ed nft command is executed in 55 secs allows for CNI to fail early, thus preventing CRI from sending another CNI DEL while the previous NFT call is still being processed. This fix prevents part of the behavior described in [0], in which: > cnv-bridge and nft comes pile up in a loop, increasing every 60, never completes The timeout had to be less than 60 seconds (otherwise CRI would still trigger CNI DEL again) but large enough for this feature to have a chance of working on older kernels (e.g. centOS 8), where it takes longer to access even a specific chain/table. Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.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.