Migrate health check to OKComputer gem

Gemfile

@@ -12,6 +12,7 @@ gem 'bootsnap', '>= 1.4.2', require: false
 gem 'bootstrap'
 gem 'kaminari'
 gem 'lograge', '>=0.11.2'
+gem 'okcomputer', '~> 1.19'
 gem 'omniauth-cas',
     git: 'https://github.com/dlindahl/omniauth-cas.git',
     ref: '7087bda829e14c0f7cab2aece5045ad7015669b1'

Gemfile.lock

@@ -211,6 +211,8 @@ GEM
     oj (3.16.8)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
+    okcomputer (1.19.1)
+      benchmark
     omniauth (1.9.1)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
@@ -422,6 +424,7 @@ DEPENDENCIES
   factory_bot_rails
   kaminari
   lograge (>= 0.11.2)
+  okcomputer (~> 1.19)
   omniauth-cas!
   paper_trail (~> 16.0)
   pg

app/controllers/home_controller.rb

@@ -1,12 +1,7 @@
 # TODO: split into HomeController & AdminController
 class HomeController < ApplicationController
-  before_action(:logout_if_expired!, except: :health)
-  before_action(:require_admin!, except: :health)
-
-  def health
-    check = Health::Check.new
-    render json: check, status: check.http_status_code
-  end
+  before_action :logout_if_expired!
+  before_action :require_admin!
 
   def admin_users
     @active_users = User.active

config/initializers/okcomputer.rb

@@ -0,0 +1,7 @@
+# Health check configuration
+
+OkComputer.logger = Rails.logger
+OkComputer.check_in_parallel = true
+
+# Ensure database migrations have been run.
+OkComputer::Registry.register 'database-migrations', OkComputer::ActiveRecordMigrationsCheck.new

config/routes.rb

@@ -5,7 +5,7 @@
 
   get '/home', to: 'forms#search_form'
   get '/admin', to: 'home#admin'
-  get '/health', to: 'home#health'
+  get '/health', to: 'ok_computer/ok_computer#index', defaults: { format: :json }
 
   # TODO: clean these all up
 

spec/request/okcomputer_spec.rb

@@ -0,0 +1,18 @@
+require 'rails_helper'
+
+RSpec.describe 'OKComputer', type: :request do
+  it 'is mounted at /okcomputer' do
+    get '/okcomputer'
+    expect(response).to have_http_status :ok
+  end
+
+  it 'returns all checks to /health' do
+    get '/health'
+    expect(response).to have_http_status :ok
+    expect(response.parsed_body.keys).to match_array %w[
+      default
+      database
+      database-migrations
+    ]
+  end
+end