docs/sd_configs.md: document __scrape_timeout__, __scrape_interval__ and __series_limit__ labels

docs/relabeling.md

@@ -249,7 +249,7 @@ See also [useful tips for target relabeling](#useful-tips-for-target-relabeling)
 Single-node VictoriaMetrics and [vmagent](https://docs.victoriametrics.com/vmagent.html) automatically add `instance` and `job` labels per each discovered target:
 
 * The `job` label is set to `job_name` value specified in the corresponding [scrape_config](https://docs.victoriametrics.com/sd_configs.html#scrape_configs).
-* The `instance` label is set to the host:port part of `__address__` label value after target-level relabeling.
+* The `instance` label is set to the `host:port` part of `__address__` label value after target-level relabeling.
   The `__address__` label value is automatically set to the most suitable value depending
   on the used [service discovery type](https://docs.victoriametrics.com/sd_configs.html#supported-service-discovery-configs).
   The `__address__` label can be overriden during relabeling - see [these docs](#how-to-modify-scrape-urls-in-targets).
@@ -284,7 +284,7 @@ URLs for scrape targets are composed of the following parts:
   just update the `__address__` label during relabeling to the needed value.
   The port part is optional. If it is missing, then it is automatically set either to `80` or `443` depending
   on the used scheme (`http` or `https`).
-  The host:port part from the final `__address__` label is automatically set to `instance` label unless the `instance`
+  The `host:port` part from the final `__address__` label is automatically set to `instance` label unless the `instance`
   label is explicitly set during relabeling.
   The `__address__` label can contain the full scrape url, e.g. `http://host:port/metrics/path?query_args`.
   In this case the `__scheme__` and `__metrics_path__` labels are ignored.

docs/sd_configs.md

@@ -1089,6 +1089,9 @@ scrape_configs:
   # Example values:
   # - "30s" - 30 seconds
   # - "2m" - 2 minutes
+  # The scrape_interval can be set on a per-target basis by specifying `__scrape_interval__`
+  # label during target relabeling phase.
+  # See https://docs.victoriametrics.com/vmagent.html#relabeling
   # scrape_interval: <duration>
 
   # scrape_timeout is an optional timeout when scraping the targets.
@@ -1100,6 +1103,9 @@ scrape_configs:
   # - "30s" - 30 seconds
   # - "2m" - 2 minutes
   # The `scrape_timeout` cannot exceed the `scrape_interval`.
+  # The scrape_timeout can be set on a per-target basis by specifying `__scrape_timeout__`
+  # label during target relabeling phase.
+  # See https://docs.victoriametrics.com/vmagent.html#relabeling
   # scrape_timeout: <duration>
 
   # metrics_path is the path to fetch metrics from targets.
@@ -1190,6 +1196,9 @@ scrape_configs:
   # stream_parse allows enabling stream parsing mode when scraping targets.
   # By default stream parsing mode is disabled for targets which return up to a few thosands samples.
   # See https://docs.victoriametrics.com/vmagent.html#stream-parsing-mode .
+  # The stream_parse can be set on a per-target basis by specifying `__stream_parse__`
+  # label during target relabeling phase.
+  # See https://docs.victoriametrics.com/vmagent.html#relabeling
   # stream_parse: <boolean>
 
   # scrape_align_interval allows aligning scrapes to the given interval.
@@ -1210,6 +1219,9 @@ scrape_configs:
   # a single target can expose during all the scrapes.
   # By default there is no limit on the number of exposed series.
   # See https://docs.victoriametrics.com/vmagent.html#cardinality-limiter .
+  # The series_limit can be set on a per-target basis by specifying `__series_limit__`
+  # label during target relabeling phase.
+  # See https://docs.victoriametrics.com/vmagent.html#relabeling
   # series_limit: ...
 
   # no_stale_markers allows disabling staleness tracking.