Add Grafana dashboard for control plane components #14029
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Signed-off-by: Beza <bezarsnba@gmail.com>
Signed-off-by: Beza <bezarsnba@gmail.com>
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Problem
There is currently no Grafana dashboard in the grafana/ directory that provides visibility into the Linkerd control plane components. Key metrics such as proxy_inject_admission_responses_total, identity_cert_refresh_count, and control_response_latency_ms_bucket are not included in any existing dashboard.
Solution
This PR introduces a new dashboard JSON file that covers the following control plane components:
The dashboard is designed to offer an at-a-glance view of the health and behavior of these components.
Validation
The dashboard was tested locally against a running Linkerd control plane. All panels correctly render data when the corresponding metrics are present.
Optionally, a screenshot can be added to visually confirm the layout.
Fixes #14021