Nova Liveboard

Real-time BEAM VM dashboard for Nova — the Erlang equivalent of Phoenix LiveDashboard.

Built on Arizona for live differential rendering over WebSocket.

Pages

Page	Description	Refresh
System	OTP release, uptime, schedulers, memory breakdown with usage bars	2s
Processes	Top 50 processes by memory/reductions/message queue, sortable	2s
ETS	All ETS tables with type, protection, size, memory, owner	3s
Applications	Running applications with versions	5s
Ports	Open ports with I/O stats	3s
Supervisors	App selector with supervision tree visualization	5s
Metrics	Live sparkline charts (memory, processes, IO, run queue) + scheduler utilization bars	2s

Setup

Add to your Nova application's rebar.config:

{deps, [
    {nova_liveboard, {git, "https://github.com/novaframework/nova_liveboard.git", {branch, "master"}}}
]}.

Add nova_liveboard to your application's dependencies in your .app.src:

{applications, [kernel, stdlib, nova, nova_liveboard]}

Configure the liveboard in your sys.config:

{nova, [
    {nova_apps, [
        #{name => nova_liveboard, prefix => "/liveboard"}
    ]}
]}

Visit http://localhost:8080/liveboard in your browser.

Dependencies

• Nova — Erlang web framework
• Arizona Core — Live view engine with compile-time template optimization
• Arizona Nova — Bridge between Arizona and Nova (WebSocket controller, PubSub)

Architecture

• Data layer (nova_liveboard_data) — Pure functions collecting VM metrics, supervision trees, scheduler wall time deltas, sparkline point generation
• Views — Arizona views with arizona_parse_transform for compile-time template optimization
• WebSocket — Thin wrapper around arizona_nova_websocket with flatten_reply to bridge Arizona's list-based frame replies to Nova's single-frame handle_ws callback
• Routing — Nova router with WebSocket route defined after /:page to ensure routing_tree matches the exact /live path before the binding

License

Apache-2.0