![]() ![]() The path, which is the final part of a channel, usually contains the identifier of some concrete resource such as the ID of a dashboard that a user is currently looking at. For example, for grafana scope this could be a name of built-in real-time feature like dashboard (i.e. Namespace has a different meaning depending on scope. For built-in features like dashboard edit notifications Grafana uses grafana scope. For example, for data source plugin channels Grafana uses ds scope. Scope determines the purpose of a channel in Grafana. The maximum length of a channel is 160 symbols. The meaning of scope, namespace and path is context-specific. Scope, namespace and path can only have ASCII alphanumeric symbols (A-Z, a-z, 0-9), _ (underscore) and - (dash) at the moment. In Grafana channel consists of 3 parts delimited by /:įor example, the channel grafana/dashboard/xyz has the scope grafana, namespace dashboard, and path xyz. Channel structureĬhannel is a string identifier. Grafana Live is a PUB/SUB server, clients subscribe to channels to receive real-time updates published to those channels. Refer to the tutorial about streaming metrics from Telegraf to Grafana for more information. These metrics are transformed into Grafana data frames and published to channels. Data streaming from TelegrafĪ new API endpoint /api/live/push/:streamId allows accepting metrics data in Influx format from Telegraf. Next, choose Live Measurements and select the plugin/testdata/random-20Hz-stream channel. To look at it create a new panel and point it to the - Grafana - data source. The basic streaming example included in Grafana core streams frames with some generated data to a panel. Refer to the tutorial about building a streaming data source backend plugin for more details. The path is a custom string that plugin authors free to choose themselves (just make sure it consists of allowed symbols).įor example, a data source channel looks like this: ds//. Namespace in the case of data source channels is a data source unique ID (UID) which is issued by Grafana at the moment of data source creation. ![]() With Grafana Live, backend data source plugins can stream updates to frontend panels.įor data source plugin channels, Grafana uses ds scope. Dashboard change notificationsĪs soon as there is a change to the dashboard layout, it is automatically reflected on other devices connected to Grafana Live. Below we describe Grafana Live features supported at the moment. Having a way to send data to clients in real-time opens a road for new ways of data interaction and visualization. For more details on how to tune this limit, refer to Live configuration section. That’s why by default Grafana Live supports 100 simultaneous connections max. Handling persistent connections like WebSocket in scale may require operating system and infrastructure tuning. There are some rules regarding Live channel names – see Grafana Live channel. All subscriptions on a page multiplexed inside a single WebSocket connection. Grafana frontend subscribes on channels to receive data which was published into that channel – in other words PUB/SUB mechanics is used. Grafana Live sends data to clients over persistent WebSocket connection. Due to network latencies, garbage collection cycles, and so on, the delay of a delivered message can be up to several hundred milliseconds or higher. Note: By real-time, we indicate a soft real-time. ![]()
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