FEATURE: allow use of redis sentinel via redis_sentinels

Use: DISCOURSE_REDIS_SENTINELS and DISCOURSE_REDIS_HOST to configure redis
sentinel

app/models/global_setting.rb

@@ -31,6 +31,25 @@ class GlobalSetting
     {"production" => hash}
   end
 
+  def self.redis_config
+    @config ||=
+      begin
+        c = {}
+        c[:host] = redis_host if redis_host
+        c[:port] = redis_port if redis_port
+        c[:password] = redis_host if redis_password.present?
+        c[:db] = redis_db if redis_db != 0
+        c[:db] = 1 if Rails.env == "test"
+        if redis_sentinels.present?
+          c[:sentinels] = redis_sentinels.split(",").map do |address|
+            host,port = address.split(":")
+            {host: host, port: port}
+          end.to_a
+        end
+        c.freeze
+      end
+  end
+
 
   class BaseProvider
     def self.coerce(setting)

config/cloud/cloud66/deploy_hooks.yml

@@ -20,12 +20,6 @@ production:
         destination: <%= ENV['RAILS_STACK_PATH'] %>/Procfile
         target: rails
         run_on: all_servers
-    # 4. Copy redis settings
-      - source: /config/cloud/cloud66/files/redis.yml
-        destination: <%= ENV['RAILS_STACK_PATH'] %>/config/redis.yml
-        target: rails
-        parse: false
-        run_on: all_servers
     # 5. Copy production.rb file
       - source: /config/cloud/cloud66/files/production.rb
         destination: <%= ENV['RAILS_STACK_PATH'] %>/config/environments/production.rb
@@ -103,12 +97,6 @@ staging:
         destination: <%= ENV['RAILS_STACK_PATH'] %>/Procfile
         target: rails
         run_on: all_servers
-    # 4. Rename redis.yml.sample file
-      - source: /config/cloud/cloud66/files/redis.yml
-        destination: <%= ENV['RAILS_STACK_PATH'] %>/config/redis.yml
-        target: rails
-        parse: false
-        run_on: all_servers
     # 5. Rename production.rb.sample file
       - source: /config/cloud/cloud66/files/production.rb
         destination: <%= ENV['RAILS_STACK_PATH'] %>/config/environments/production.rb
@@ -168,8 +156,6 @@ development:
     first_thing:
     # 1. Permissions on postgres box
       - source: /config/cloud/cloud66/scripts/permissions.sh
-        destination: /tmp/scripts/permissions.sh
-        target: postgresql
         apply_during: build_only
         execute: true
         sudo: true
@@ -186,12 +172,6 @@ development:
         destination: <%= ENV['RAILS_STACK_PATH'] %>/Procfile
         target: rails
         run_on: all_servers
-    # 4. Rename redis.yml.sample file
-      - source: /config/cloud/cloud66/files/redis.yml
-        destination: <%= ENV['RAILS_STACK_PATH'] %>/config/redis.yml
-        target: rails
-        parse: false
-        run_on: all_servers
     # 5. Move thin config to server
       - source: /config/cloud/cloud66/files/thin.yml
         destination: <%= ENV['RAILS_STACK_PATH'] %>/config/thin.yml

config/cloud/cloud66/files/redis.yml

@@ -1,22 +0,0 @@
-defaults: &defaults
-  uri: <%= uri = URI.parse( ENV['REDIS_ADDRESS'].nil? ? ENV['REDIS_PROVIDER_URL'] || "redis://localhost:6379" : "redis://#{ENV['REDIS_ADDRESS']}:6379") %>
-  host: <%= uri.host %>
-  port: <%= uri.port %>
-  password: <%= uri.password %>
-  db: 0
-
-development:
-  <<: *defaults
-
-profile:
-  <<: *defaults
-
-test:
-  <<: *defaults
-  db: 1
-
-staging:
-  <<: *defaults
-
-production:
-  <<: *defaults

config/discourse_defaults.conf

@@ -92,6 +92,10 @@ redis_db = 0
 # redis password
 redis_password =
 
+# redis sentinels eg
+# redis_sentinels = 10.0.0.1:26381,10.0.0.2:26381
+redis_sentinels =
+
 # enable Cross-origin Resource Sharing (CORS) directly at the application level
 enable_cors = false
 cors_origin = ''

config/initializers/04-message_bus.rb

@@ -29,7 +29,7 @@ MessageBus.on_disconnect do |site_id|
 end
 
 # Point at our redis
-MessageBus.redis_config = YAML.load(ERB.new(File.new("#{Rails.root}/config/redis.yml").read).result)[Rails.env].symbolize_keys
+MessageBus.redis_config = GlobalSetting.redis_config
 
 MessageBus.long_polling_enabled = SiteSetting.enable_long_polling
 MessageBus.long_polling_interval = SiteSetting.long_polling_interval

config/redis.yml

@@ -1,21 +0,0 @@
-defaults: &defaults
-  host: <%= GlobalSetting.redis_host %>
-  port: <%= GlobalSetting.redis_port %>
-  password: <%= GlobalSetting.redis_password %>
-  db: <%= GlobalSetting.redis_db %>
-
-development:
-  <<: *defaults
-
-profile:
-  <<: *defaults
-
-test:
-  <<: *defaults
-  db: 1
-
-staging:
-  <<: *defaults
-
-production:
-  <<: *defaults

lib/discourse.rb

@@ -354,7 +354,9 @@ module Discourse
   end
 
   def self.sidekiq_redis_config
-    { url: $redis.url, namespace: 'sidekiq' }
+    conf = GlobalSetting.redis_config.dup
+    conf[:namespace] = 'sidekiq'
+    conf
   end
 
   def self.static_doc_topic_ids

lib/discourse_redis.rb

@@ -6,18 +6,11 @@ class DiscourseRedis
 
   def self.raw_connection(config = nil)
     config ||= self.config
-    redis_opts = {host: config['host'], port: config['port'], db: config['db']}
-    redis_opts[:password] = config['password'] if config['password']
-    Redis.new(redis_opts)
+    Redis.new(config)
   end
 
   def self.config
-    @config ||= YAML.load(ERB.new(File.new("#{Rails.root}/config/redis.yml").read).result)[Rails.env]
-  end
-
-  def self.url(config=nil)
-    config ||= self.config
-    "redis://#{(':' + config['password'] + '@') if config['password']}#{config['host']}:#{config['port']}/#{config['db']}"
+    GlobalSetting.redis_config
   end
 
   def initialize(config=nil)
@@ -30,10 +23,6 @@ class DiscourseRedis
     @redis
   end
 
-  def url
-    self.class.url(@config)
-  end
-
   def self.ignore_readonly
     yield
   rescue Redis::CommandError => ex

script/bench.rb

@@ -104,11 +104,6 @@ unless File.exists?("config/database.yml")
   `cp config/database.yml.development-sample config/database.yml`
 end
 
-unless File.exists?("config/redis.yml")
-  puts "Copying redis.yml.sample to redis.yml"
-  `cp config/redis.yml.sample config/redis.yml`
-end
-
 ENV["RAILS_ENV"] = "profile"
 
 

script/setup_dev

@@ -12,14 +12,8 @@ puts "Running: bundle"
 system "bundle"
 
 
-redis_yml = root + '/config/redis.yml'
 database_yml = root + '/config/database.yml'
 
-if !File.exists?(redis_yml)
-  puts "Creating config/redis.yml"
-  system "cp #{root}/config/redis.yml.sample #{redis_yml}"
-end
-
 if !File.exists?(database_yml)
   puts "Creating config/database.yml"
   system "cp #{root}/config/database.yml.development-sample #{database_yml}"