new loadbalancer cap tasks (#860)

* pin version of health-monitor * add two loadbalancer caps one of the cap tasks removes a service for the loadbalancer and the other one adds it back to server --------- Co-authored-by: Max Kadel <[email protected]>
pulibrary · Nov 13, 2024 · 9591f4a · 9591f4a
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commit 9591f4a
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Showing 4 changed files with 36 additions and 4 deletions.
diff --git a/Gemfile b/Gemfile
@@ -19,7 +19,7 @@ gem 'ed25519', '~> 1.3'
 gem 'faraday', '~> 2.7'
 gem "flipflop", git: "https://github.com/voormedia/flipflop.git", ref: "0d70d8e33483a9c0282ed8d6bca9c5ccd61e61e8"
 gem 'foreman'
-gem "health-monitor-rails"
+gem "health-monitor-rails", "12.4.0"
 gem 'honeybadger'
 gem 'icalendar'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder

diff --git a/Gemfile.lock b/Gemfile.lock
@@ -228,7 +228,7 @@ GEM
       activesupport (>= 6.1)
     hashdiff (1.1.0)
     hashie (5.0.0)
-    health-monitor-rails (12.3.0)
+    health-monitor-rails (12.4.0)
       railties (>= 6.1)
     honeybadger (5.13.0)
     httparty (0.22.0)
@@ -546,6 +546,7 @@ PLATFORMS
   arm64-darwin-21
   arm64-darwin-22
   arm64-darwin-23
+  arm64-darwin-24
   x86_64-darwin-21
   x86_64-linux
 
@@ -572,7 +573,7 @@ DEPENDENCIES
   faraday (~> 2.7)
   flipflop!
   foreman
-  health-monitor-rails
+  health-monitor-rails (= 12.4.0)
   honeybadger
   icalendar
   jbuilder (~> 2.5)

diff --git a/config/deploy.rb b/config/deploy.rb
@@ -13,7 +13,34 @@
 
 # Default value for :format is :airbrussh.
 # set :format, :airbrussh
+#
+#   # You can/ should apply this command to a subset of hosts
+# cap --hosts=lib-jobs-staging2.lib.princeton.edu staging application:remove_from_nginx
+desc "Marks the server(s) to be removed from the loadbalancer"
+task :remove_from_nginx do
+  count = 0
+  on roles(:app) do
+    count += 1
+  end
+  raise "You must run this command on individual servers utilizing the --hosts= switch" if count > (roles(:app).length / 2)
+  on roles(:app) do
+    within release_path do
+      execute :touch, "public/remove-from-nginx"
+    end
+  end
+end
+# You can/ should apply this command to a subset of hosts
+# cap --hosts=lib-jobs-staging2.lib.princeton.edu staging application:serve_from_nginx
+desc "Marks the server(s) to be added back to the loadbalancer"
+task :serve_from_nginx do
+  on roles(:app) do
+    within release_path do
+      execute :rm, "-f public/remove-from-nginx"
+    end
+  end
+end
 
+before "deploy:reverted", "deploy:assets:precompile"
 # You can configure the Airbrussh format using :format_options.
 # These are the defaults.
 # set :format_options, command_output: true, log_file: "log/capistrano.log", color: :auto, truncate: :auto

diff --git a/config/initializers/health_monitor.rb b/config/initializers/health_monitor.rb
@@ -6,9 +6,13 @@
     # Make this health check available at /health
     config.path = :health
 
+    config.file_absence.configure do |file_config|
+      file_config.filename = "public/remove-from-nginx"
+    end
+
     config.error_callback = proc do |e|
       Rails.logger.error "Health check failed with: #{e.message}"
-      Honeybadger.notify(e)
+      Honeybadger.notify(e) unless e.is_a?(HealthMonitor::Providers::FileAbsenceException)
     end
   end
 end