Replace Redis with Solid Cable

Author: northeastprince

.env.erb

@@ -1,5 +1,4 @@
 RAILS_MASTER_KEY=<%= ENV["RAILS_MASTER_KEY"] %>
-REDIS_URL=<%= ENV["REDIS_URL"] %>
 
 <% ENV["RAILS_ENV"] = "production" %>
 <% require_relative "config/application" %>

.github/workflows/cd.yml

@@ -21,13 +21,6 @@ jobs:
       - name: Setup Docker
         uses: docker/setup-buildx-action@v3
       - uses: crazy-max/ghaction-github-runtime@v3
-      - name: Get credentials from Heroku
-        env:
-          HEROKU_API_KEY: ${{ secrets.HEROKU_API_KEY }}
-        run: |
-          curl https://cli-assets.heroku.com/install-ubuntu.sh | sudo sh
-          REDIS_URL=$(heroku config:get REDIS_URL -a hackathons)
-          echo "REDIS_URL=${REDIS_URL}" >> $GITHUB_ENV
       - name: Deploy to production!
         run: bundle exec kamal deploy
         env:

.kamal/secrets

@@ -3,8 +3,6 @@ KAMAL_REGISTRY_PASSWORD=$KAMAL_REGISTRY_PASSWORD
 
 RAILS_MASTER_KEY=$RAILS_MASTER_KEY
 
-REDIS_URL=$REDIS_URL
-
 LITESTREAM_ACCESS_KEY_ID=$LITESTREAM_ACCESS_KEY_ID
 LITESTREAM_SECRET_ACCESS_KEY=$LITESTREAM_SECRET_ACCESS_KEY
 LITESTREAM_BUCKET=$LITESTREAM_BUCKET

Gemfile

@@ -10,7 +10,8 @@ gem "dotenv-rails", require: "dotenv/load"
 # Drivers
 gem "sqlite3"
 gem "puma"
-gem "redis"
+
+gem "solid_cable"
 
 # Assets
 gem "sprockets-rails"

Gemfile.lock

@@ -376,10 +376,6 @@ GEM
     rake (13.2.1)
     rdoc (6.10.0)
       psych (>= 4.0.0)
-    redis (5.3.0)
-      redis-client (>= 0.22.0)
-    redis-client (0.22.2)
-      connection_pool
     regexp_parser (2.10.0)
     reline (0.6.0)
       io-console (~> 0.5)
@@ -417,6 +413,11 @@ GEM
     simple_form (5.3.1)
       actionpack (>= 5.2)
       activemodel (>= 5.2)
+    solid_cable (3.0.5)
+      actioncable (>= 7.2)
+      activejob (>= 7.2)
+      activerecord (>= 7.2)
+      railties (>= 7.2)
     solid_queue (1.1.2)
       activejob (>= 7.1)
       activerecord (>= 7.1)
@@ -530,8 +531,8 @@ DEPENDENCIES
   rack-cors
   rack-mini-profiler
   rails!
-  redis
   simple_form
+  solid_cable
   solid_queue
   sprockets-rails
   sqlite3

README.md

@@ -62,8 +62,6 @@ brew install vips
 
 **Vendors:**
 
-- Heroku
-  - Redis (Heroku Data for Redis `premium0`)
 - Hetzner
   - Runs the Rails app and Solid Queue (3 vCPU, 4 GB)
   - Deployed via [Kamal](https://kamal-deploy.org)

config/cable.yml

@@ -5,7 +5,7 @@ test:
   adapter: test
 
 production:
-  adapter: redis
-  url: <%= ENV["REDIS_URL"] %>
-  ssl_params:
-    verify_mode: <%= OpenSSL::SSL::VERIFY_NONE %>
+  adapter: solid_cable
+  connects_to:
+    database:
+      writing: cable

config/database.yml

@@ -12,5 +12,10 @@ test:
   database: storage/test.sqlite3
 
 production:
-  <<: *default
-  database: storage/production.sqlite3
+  primary:
+    <<: *default
+    database: storage/production.sqlite3
+  cable:
+    <<: *default
+    database: storage/production_cable.sqlite3
+    migrations_paths: db/cable_migrate

config/deploy.yml

@@ -40,7 +40,6 @@ env:
     WEB_CONCURRENCY: 2
   secret:
     - RAILS_MASTER_KEY
-    - REDIS_URL
 
 asset_path: "/hackathons/public/assets"
 volumes: ["hackathons-storage:/hackathons/storage"]

db/cable_schema.rb

@@ -0,0 +1,11 @@
+ActiveRecord::Schema[7.1].define(version: 1) do
+  create_table "solid_cable_messages", force: :cascade do |t|
+    t.binary "channel", limit: 1024, null: false
+    t.binary "payload", limit: 536870912, null: false
+    t.datetime "created_at", null: false
+    t.integer "channel_hash", limit: 8, null: false
+    t.index ["channel"], name: "index_solid_cable_messages_on_channel"
+    t.index ["channel_hash"], name: "index_solid_cable_messages_on_channel_hash"
+    t.index ["created_at"], name: "index_solid_cable_messages_on_created_at"
+  end
+end