This Grafana plugin adds the Discrete panel to Grafana:

  https://grafana.com/plugins/natel-discrete-panel

This panel can be used to display a time line of discrete information (such as
"service up/down") and can deal with multiple metrics (e.g. in the case of a
highly available service on multiple hosts). Singlestat panel, which
is usually employed for this purpose, cannot do this.

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