主题： prometheus
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Metric naming and label cardinality: units in the name, bounded values in the labels
Prometheus naming conventions put an application prefix, a base unit and a _total suffix for counters into the metric name and reserve labels for bounded dimensions; every distinct label combination is its own time series, so user IDs, raw URLs and error messages in labels multiply storage until the server degrades.
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Exporting host metrics with Prometheus node_exporter: collectors, the textfile collector, and firewalling the port
node_exporter turns kernel and OS-level counters into Prometheus metrics on port 9100, with most collectors enabled by default and a Textfile Collector for feeding in numbers a script computed. Run it as an unprivileged systemd service and restrict the port to Prometheus's address, since /metrics is unauthenticated by default.
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windows_exporter: installing the MSI with enabled collectors, and verifying /metrics on Windows
windows_exporter ships as an MSI that installs itself as a Windows service and can take installer properties for which collectors to enable, the listen port, and a Windows Firewall exception, all set non-interactively through msiexec.
机器可读： JSON