Hotplug and Virtio - Tetsuya Mukawa
- 1. Userspace 2015 | Dublin Dynamic NFV Deployment with Port Hotplug and Virtio Tetsuya Mukawa, IGEL Co., Ltd.
- 2. About me • I am a software engineer at IGEL Co., Ltd. • Roughly 10 years experience in embedded linux products. • Currently, I am one of developers of Lagopus, an open source software switch. – https://lagopus.github.io/
- 3. Agenda • Current Status of Port Hotplug • Dynamic NFV Deployment with Port Hotplug and Virtio – Current limitations – What will be solved in DPDK-2.2/2.3?
- 4. Current Status of Port Hotplug
- 5. Port 0 • After starting an application – attach to a port – detach from a port • To support Port Hotplug, each PMD and EAL needs to be changed. Detached Port 2 Attached Port 1 DPDK application What is Port Hotplug?
- 6. Supported OS and UIO module • Linux – igb_uio – uio_pci_generic – VFIO • BSD – nic_uio No support for VFIO
- 7. Supported PMD PMD Supported version Submitter of Port Hotplug bond 2.1 Bernard Iremonger ring 2.1 Bernard Iremonger virtio 2.1 Bernard Iremonger i40e 2.1 Bernard Iremonger ixgbe 2.1 Bernard Iremonger e1000 2.1 Bernard Iremonger fm10k 2.1 Michael Qiu null 2.0 Tetsuya Mukawa pcap 2.0 Tetsuya Mukawa Thanks for hard working of Bernard and Michael.
- 8. Not Supported PMD • Below PMDs – af_packet – mlx4 – xenvirt – bnx2x – cxgbe – mpipe
- 9. Dynamic NFV Deployment with Port Hotplug and Virtio
- 10. Background NFVNFVNFV • In some cases, NFV is needed to be deployed on demand.
- 11. Block Diagram of Host NFVNFVNFV Detail of Host Port Software Switch (SSW) Hotplugged Port for NFV NFV • To deploy NFV dynamically, followings are needed. – Software Swtich(SSW) – Port Hotplug function – Hotplugged port for NFV
- 12. Block Diagram of NFV NFVNFVNFV Detail of Host Port Software Switch (SSW) Hotplugged Port for NFV NFV Detail of NFV VM / Container Virtual NIC Driver Virtual NIC Virtual Wire to SSW Application
- 13. Component description Port Software Switch (SSW) Hotplugged Port for NFV VM / Container Virtual NIC Driver Virtual NIC Virtual Wire to SSW Application Component Description VM / Container Isolation to separate NFV and Software switch Application NFV application Virtual NIC Driver Device driver for virtual NIC Virtual NIC Virtual NIC device to connect to SSW Virtual Wire to SSW Connection between Virtural NIC and SSW Hotplugged Port for NFV Abstraction for SSW to treat NFV connection as normal port Software Switch Packet distributor
- 14. Which legacy implementations can be used? Feature Available implementation VM / Container QEMU/KVM(*1) Virtual NIC Driver virtio-net PMD Virtual NIC virtio-net Virtual Wire to SSW vhost-user / vhost-cuse Hotplugged Port for NFV Port Hotplug API(*2) librte_vhost Software Switch Lagopus / dpdk-ovs / etc... (*1) No support for container. (*2) There is no PMD for this purpose. Port Software Switch (SSW) Hotplugged Port for NFV VM / Container Virtual NIC Driver Virtual NIC Virtual Wire to SSW Application
- 15. Current limitations • No PMD for NFV connected port. • No Support for container like docker. • Denial of reconnection. – Currently, when SSW is killed or stopped, then restarted, NFV cannot connect to SSW. To connect again, NFV also needs to be restarted.
- 16. What will be solved in DPDK-2.2/2.3? • “vhost PMD” for NFV connected port. – The PMD will support Port Hotplug. • Container support. – Virtio and vhost will be used. – All containers will be supported.
- 17. Conclusion • So far, we have a few issues. 1. No PMD for NFV connected port. 2. No container support. 3. Denial of reconnection. • Hopefully “1” and “2” will be solved in half year. • But still “3” will be left.
- 18. Thanks