bug-1906113: remove eliot references

This fixes a bunch of copy-paste errors and switches to statsd-centric
language.

docs/exts/document_metrics.py

@@ -2,7 +2,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
-"""Generates the documentation for Eliot metrics."""
+"""Generates the documentation for metrics."""
 
 import importlib
 import sys

docs/metrics.rst

@@ -4,7 +4,10 @@
 Metrics
 =======
 
-Metrics in Tecken
-=================
+StatsD Metrics in Tecken
+========================
 
-.. autometrics:: tecken.libmarkus.TECKEN_METRICS
+Tecken uses `StatsD <https://github.com/statsd/statsd>`__ with
+`DogStatsD extensions <https://docs.datadoghq.com/developers/dogstatsd/?tab=hostagent>`__.
+
+.. autometrics:: tecken.libmarkus.STATSD_METRICS

tecken/libmarkus.py

@@ -19,17 +19,17 @@
 METRICS = markus.get_metrics("tecken")
 
 
-# Complete index of all Eliot metrics. This is used in documentation and to filter
-# outgoing metrics.
+# Complete index of all metrics. This is used in documentation and to filter outgoing
+# metrics.
 def _load_registered_metrics():
-    # Load the eliot_metrics.yaml file in this directory
-    path = Path(__file__).parent / "tecken_metrics.yaml"
+    # Load the metrics yaml file in this directory
+    path = Path(__file__).parent / "statsd_metrics.yaml"
     with open(path) as fp:
         data = yaml.safe_load(fp)
     return data
 
 
-TECKEN_METRICS = _load_registered_metrics()
+STATSD_METRICS = _load_registered_metrics()
 
 
 def set_up_markus(backends, hostname, debug=False):
@@ -43,7 +43,7 @@ def set_up_markus(backends, hostname, debug=False):
         # In local dev and test environments, we want the RegisteredMetricsFilter to
         # raise exceptions when metrics are used incorrectly.
         metrics_filter = RegisteredMetricsFilter(
-            registered_metrics=TECKEN_METRICS, raise_error=True
+            registered_metrics=STATSD_METRICS, raise_error=True
         )
         METRICS.filters.append(metrics_filter)