AP-521: convert health checks to okcomputer

Author: anarchivist

Gemfile

@@ -11,6 +11,7 @@ gem 'berkeley_library-logging', '~> 0.2'
 gem 'browser', '~> 4.2'
 gem 'jbuilder', '~> 2.7'
 gem 'non-stupid-digest-assets', '~> 1.0' # Allow static pages (e.g. 404.html) to link to compiled assets
+gem 'okcomputer', '~> 1.19'
 gem 'omniauth-cas', '~> 2.0'
 gem 'puma', '~> 5.3', '>= 5.3.1'
 gem 'rails', '~> 7.0.4'

Gemfile.lock

@@ -70,6 +70,7 @@ GEM
       public_suffix (>= 2.0.2, < 6.0)
     amazing_print (1.5.0)
     ast (2.4.2)
+    benchmark (0.5.0)
     berkeley_library-av-core (0.4.3)
       berkeley_library-logging (~> 0.2)
       berkeley_library-marc (~> 0.2, >= 0.2.1)
@@ -187,6 +188,8 @@ GEM
     non-stupid-digest-assets (1.0.9)
       sprockets (>= 2.0)
     oj (3.16.1)
+    okcomputer (1.19.1)
+      benchmark
     omniauth (1.9.2)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
@@ -368,6 +371,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (>= 3.0)
   non-stupid-digest-assets (~> 1.0)
+  okcomputer (~> 1.19)
   omniauth-cas (~> 2.0)
   puma (~> 5.3, >= 5.3.1)
   rails (~> 7.0.4)

app/controllers/player_controller.rb

@@ -1,6 +1,5 @@
 require 'active_record'
 require 'berkeley_library/av/core'
-require 'health/check'
 
 class PlayerController < ApplicationController
 
@@ -35,11 +34,6 @@ def access_restricted(exception)
     }
   end
 
-  def health
-    check = Health::Check.new
-    render json: check, status: check.http_status_code
-  end
-
   def preview
     render locals: { tracks: preview_tracks }
   end

app/lib/health/check.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+# Health check configuration
+
+OkComputer.logger = Rails.logger
+OkComputer.check_in_parallel = true
+
+ALMA_TEST_ID = 'b23305522'
+TIND_TEST_ID = '(pacradio)01469'
+WOWZA_TEST_COLL = 'Pacifica'
+WOWZA_TEST_PATH = 'PRA_NHPRC1_AZ1084_00_000_00.mp3'
+
+ALMA_TEST_URL = BerkeleyLibrary::AV::Metadata::Source::ALMA.marc_uri_for(ALMA_TEST_ID).to_s
+WOWZA_TEST_URL = BerkeleyLibrary::AV::Track.hls_uri_for(collection: WOWZA_TEST_COLL, relative_path: WOWZA_TEST_PATH).to_s
+
+class TindCheck < OkComputer::Check
+  def check
+    _ = BerkeleyLibrary::AV::Record.from_metadata(collection: WOWZA_TEST_COLL, record_id: TIND_TEST_ID)
+    mark_message 'Authenticated TIND HTTP check successful'
+  rescue BerkeleyLibrary::AV::RecordNotFound
+    mark_failure
+    mark_message("Authenticated TIND HTTP check failed: record #{TIND_TEST_ID} not found")
+  rescue StandardError => e
+    mark_failure
+    mark_message("Authenticated TIND HTTP check failed: #{e}")
+  end
+end
+
+# Ensure Alma and TIND APIs are working.
+OkComputer::Registry.register 'alma-metadata', OkComputer::HttpCheck.new(ALMA_TEST_URL)
+OkComputer::Registry.register 'tind-metadata', TindCheck.new
+
+# Ensure Wowza is working
+OkComputer::Registry.register 'wowza-streaming', OkComputer::HttpCheck.new(WOWZA_TEST_URL)

app/lib/health/result.rb

@@ -11,8 +11,7 @@
   get '/:collection/:record_id', to: 'player#show', as: :player
 
   defaults format: 'json' do
-    # TODO: separate HealthController
-    get '/health', to: 'player#health'
+    get '/health', to: 'ok_computer/ok_computer#index'
   end
 
   # Expects query string: collection=<collection>&relative_path=<paths>, where

app/lib/health/status.rb

@@ -0,0 +1,4 @@
+#EXTM3U
+#EXT-X-VERSION:3
+#EXT-X-STREAM-INF:BANDWIDTH=170413,CODECS="mp4a.40.34"
+chunklist_w600161955.m3u8