puma: add Prometheus metrics exporter.

To test it, run `bin/rails server` then do `curl http://localhost:9393`. https://github.com/harmjanblok/puma-metrics
2021-09-11 10:09:58 -05:00
parent ee1c3c9418
commit 0aab81440f
3 changed files with 14 additions and 0 deletions
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -316,6 +316,7 @@ GEM
    parser (3.0.2.0)
      ast (~> 2.4.1)
    pg (1.2.3)
+    prometheus-client (2.1.0)
    pry (0.13.1)
      coderay (~> 1.1)
      method_source (~> 1.0)
@@ -327,6 +328,9 @@ GEM
    public_suffix (4.0.6)
    puma (5.4.0)
      nio4r (~> 2.0)
+    puma-metrics (1.2.3)
+      prometheus-client (>= 0.10)
+      puma (>= 3.0)
    pundit (2.1.1)
      activesupport (>= 3.0.0)
    racc (1.5.2)
@@ -557,6 +561,7 @@ DEPENDENCIES
  pry-byebug
  pry-rails
  puma
+  puma-metrics
  pundit
  rack-mini-profiler
  rails (~> 6.0)