K9s
What it is
K9s is a terminal interface for navigating, observing and managing Kubernetes clusters and applications. It watches for cluster changes and tracks resource activity and metrics in real time, including for pods, containers and nodes. It works with standard Kubernetes resources and custom resource definitions. Users can view logs, scale or restart resources, and set up port forwarding. Pulses summarizes cluster state, while XRay shows resource dependencies; users can customize skins, columns, aliases and hotkeys. Plugins add cluster commands that receive resource and cluster context variables. K9s can display RBAC rules and show what a user, group or ServiceAccount can do. A read-only mode disables resource modification commands. It integrates Hey for benchmarking HTTP endpoints through port forwards and services; those forwards end when the K9s session exits. K9s is free and open source under the Apache License 2.0, with optional sponsorship, and runs on Linux, macOS and Windows. It has no graphical interface. The project prefers Kubernetes 1.28 or later and warns that older versions or insufficient RBAC permissions can cause problems.
For and against
For
- Tracks cluster activity and metrics in real time.
- Supports standard resources and custom resource definitions.
- Includes logs, scaling, port forwarding and restart actions.
- Read-only mode disables resource modification commands.
- Free and available on Linux, macOS and Windows.
Against
- It has no graphical interface.
- Older Kubernetes versions may cause problems.
- Insufficient RBAC permissions may cause problems.
The verdict
K9s provides cluster views and management actions in a terminal interface, with customization, plugins and a read-only mode. Consider its Kubernetes compatibility and RBAC caveats, as well as the lack of a graphical interface.
Who it suits
K9s is aimed at people who use Kubernetes clusters and want a terminal-based interface for cluster observation and management. It may suit users who need resource metrics, RBAC visibility or a read-only mode.
Plans and prices
K9s
Open-source Kubernetes terminal UI · optional sponsorship
Read 7 Oct 2026 · github.com
On the record
- Benchmarking
- K9s integrates Hey to benchmark HTTP endpoints through port forwards and services; port forwards end when the K9s session exits.k9scli.io · read 7 Oct 2026
- Compatibility limit
- The repository says K9s works best with later Kubernetes versions and warns that older versions or insufficient RBAC permissions can cause problems.github.com · read 7 Oct 2026
- Extensions
- Users can add cluster commands through plugins, which run configured commands with resource and cluster context variables.k9scli.io · read 7 Oct 2026
- Live monitoring
- It watches Kubernetes for changes and tracks resource activity in real time.k9scli.io · read 7 Oct 2026
- Management actions
- Its cluster management commands include viewing logs, scaling, port forwarding, and restarting resources.k9scli.io · read 7 Oct 2026
- Metrics
- It tracks real-time metrics for resources including pods, containers, and nodes.k9scli.io · read 7 Oct 2026
- Purpose
- K9s is a terminal UI for navigating, observing, and managing Kubernetes clusters and their applications.k9scli.io · read 7 Oct 2026
- RBAC
- K9s can display RBAC rules and look up what a user, group, or ServiceAccount can do on a cluster.k9scli.io · read 7 Oct 2026
- Resource support
- It handles standard Kubernetes resources and custom resource definitions (CRDs).k9scli.io · read 7 Oct 2026
- Security and compliance
- The opened maker pages identify the Apache License 2.0 but do not state security certifications or compliance attestations.github.com · read 7 Oct 2026
- Security controls
- K9s supports read-only mode, which disables resource modification commands.k9scli.io · read 7 Oct 2026
- Support and audience
- The project invites sponsorship and community contact through its K9ers Slack, and describes K9s as a tool for Kubernetes cluster users.k9scli.io · read 7 Oct 2026
- Views and customization
- Pulses summarizes cluster state, XRay shows resource dependencies, and users can customize skins, columns, aliases, and hotkeys.k9scli.io · read 7 Oct 2026
