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Spiderpool
What it is
Spiderpool is a free, open-source networking solution for Kubernetes running on bare metal, virtual machines, or public clouds. It provides underlay and RDMA networking through a CRD-based IP address manager. The IPAM supports dual-stack networks, shared or exclusive pools, and static addresses for stateful applications. Spiderpool works with Macvlan, IPvlan, and SR-IOV, and its IPAM can also pair with compatible CNIs including Calico and Weave. Pods may use multiple underlay interfaces or combine underlay and overlay interfaces, with policy routing across them. Documented connectivity functions include Pod-to-host access, conflict detection, gateway checks, and service access through kube-proxy or an eBPF replacement. RDMA support covers RoCE and InfiniBand, with shared or exclusive device assignment. Use cases include storage, middleware, observability, AI training, latency-sensitive workloads, and separate-bandwidth applications. It supports x86-64 and arm64 nodes; SpiderSubnet requires Kubernetes 1.21 or later. The project is Apache 2.0 licensed and identified as a CNCF sandbox project.
For and against
For
- Free Apache 2.0 open-source project
- Supports dual-stack and static IP addresses
- Works with Macvlan, IPvlan, and SR-IOV
- Provides RoCE and InfiniBand RDMA
- Supports multiple interfaces and policy routing
Against
- IPAM and routing coordination are beta
- RDMA and multi-cluster networking are alpha
- SpiderSubnet requires Kubernetes 1.21 or later
The verdict
Spiderpool combines Kubernetes IP management, multiple network interfaces, and RDMA capabilities in one open-source project. Its maturity labels and Kubernetes requirement are important considerations for deployment planning.
Who it suits
Spiderpool suits Kubernetes operators needing underlay, multi-interface, IPAM, or RDMA networking. It fits workloads such as storage, AI training, observability, and latency-sensitive applications.
Plans and prices
Free (Apache License 2.0)
Open source project; Kubernetes networking solution
Read 4 Oct 2026 · spidernet-io.github.io
On the record
- CNI support
- Spiderpool works with Macvlan, IPvlan, and SR-IOV, and its IPAM can also be used with compatible CNIs such as Calico and Weave.spidernet-io.github.io · read 4 Oct 2026
- Connectivity
- The project documents Pod-to-host connectivity, IP conflict detection, gateway reachability checks, and service access through kube-proxy or an eBPF-based replacement.spidernet-io.github.io · read 4 Oct 2026
- Deployment requirements
- Documented node architectures are x86-64 and arm64; the SpiderSubnet feature requires Kubernetes v1.21 or later.spidernet-io.github.io · read 4 Oct 2026
- Feature maturity
- The roadmap marks IPAM and multiple NIC and routing coordination as beta, while RDMA and multi-cluster networking are alpha for macvlan, ipvlan, and SR-IOV.spidernet-io.github.io · read 4 Oct 2026
- IP address management
- Its CRD-based IPAM supports dual-stack networking, shared and exclusive pools, and static IP addresses for stateful applications.spidernet-io.github.io · read 4 Oct 2026
- Multiple interfaces
- Pods can use multiple underlay interfaces or a combination of underlay and overlay interfaces, with policy routing managed across interfaces.spidernet-io.github.io · read 4 Oct 2026
- Project status
- The project describes itself as a Cloud Native Computing Foundation sandbox project.spidernet-io.github.io · read 4 Oct 2026
- Purpose
- Spiderpool is an underlay and RDMA networking solution for Kubernetes on bare metal, virtual machines, and public clouds.spidernet-io.github.io · read 4 Oct 2026
- RDMA
- Spiderpool supports RDMA using RoCE and InfiniBand, with devices available to Pods in shared or exclusive mode.spidernet-io.github.io · read 4 Oct 2026
- Security and license
- Spiderpool is licensed under Apache License 2.0.spidernet-io.github.io · read 4 Oct 2026
- Support
- The project lists CNCF Slack, a monthly community meeting, maintainer email, and a WeChat group as community contact options.spidernet-io.github.io · read 4 Oct 2026
- Use cases
- The project identifies storage, middleware, observability, AI training, latency-sensitive workloads, and applications needing separate network bandwidth as use cases.spidernet-io.github.io · read 4 Oct 2026
