cockroachdb / cockroachdb/cockroach
metric: `can_view_all_metrics` capability enables host metrics in prometheus endpoint
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C-enhancement
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Description
When the `can_view_all_metrics` capability is enabled for a virtual cluster, the `/_status/vars` endpoint should include host metrics as well (such as `sys_rss`, `sys_cpu_combined_percent_normalized`, etc.
Today, when accessing `/_status/vars` for a virtual cluster, we can only see host metrics when we use the `tenant=system` cookie. We should enable this for arbitrary virtual clusters when the capability is enabled.
Jira issue: CRDB-48832
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