Hubble

Spec sheet

Purpose

Hubble is a distributed networking and security observability platform for cloud native workloads, built on Cilium and eBPF.Read 5 Oct 2026 · github.com

Integrations

Hubble is built on Cilium and eBPF; Cilium documentation names Prometheus and Grafana among monitoring systems that integrate with its metrics and alerting.Read 5 Oct 2026 · docs.cilium.io

Support

The project directs users to the Cilium Slack #hubble channel to ask questions and share experiences with developers and users.Read 5 Oct 2026 · github.com

License

The project is open source and licensed under the Apache License.Read 5 Oct 2026 · github.com

API access

By default, the Hubble API operates on the node where the Cilium agent runs, and the Hubble CLI queries it through a local Unix Domain Socket.Read 5 Oct 2026 · docs.cilium.io

Compatibility

The Hubble CLI is backward compatible with supported Cilium releases, and only the latest Hubble CLI version is maintained.Read 5 Oct 2026 · github.com

Deployment scope

Hubble can provide visibility at node, cluster, or multi-cluster scope; Hubble Relay enables cluster-wide or Cluster Mesh visibility.Read 5 Oct 2026 · docs.cilium.io

Flow visibility

It provides visibility into individual TCP connections, DNS queries, HTTP requests, Kafka communication, and other network and application protocol flows.Read 5 Oct 2026 · github.com

Metrics

Its monitoring examples include network behavior, network policy observation, HTTP request and response rates and latency, and DNS request and response monitoring.Read 5 Oct 2026 · github.com

Security configuration

The documentation describes configuring TLS for the Hubble API and TLS client certificates when connecting Hubble UI to a TLS-enabled Relay.Read 5 Oct 2026 · docs.cilium.io

Security observability

Hubble can show connections blocked by network policy, services accessed from outside a cluster, and services resolving particular DNS names.Read 5 Oct 2026 · github.com

Service maps

It automatically discovers Kubernetes service dependencies at L3/L4 and L7 and visualizes and filters data flows as a service map.Read 5 Oct 2026 · github.com

Stability

The repository lists Hubble CLI, Server, Metrics, and Relay as stable, while Hubble UI is beta and should be used with caution in critical production workloads.Read 5 Oct 2026 · github.com

Web interface

Hubble UI is a web interface for visualizing and filtering service dependencies and data flows, accessed through a browser.Read 5 Oct 2026 · docs.cilium.io

Plans and prices

Every Hubble plan and price →

Where Specifiction places it

• eBPF Observability Tools#14 of 297.8