chore: Set up solid cache

Gemfile

@@ -16,16 +16,13 @@ gem 'nilify_blanks', '~> 1.4'
 gem 'data_migrate'
 gem 'solid_cable'
 gem 'solid_queue'
+gem 'solid_cache'
 
 # frontend
 gem 'haml-rails', '~> 2.0'
 gem 'turbo-rails', '~> 2.0'
 gem 'view_component'
 
-# TO BE REMOVED
-gem 'redis'
-gem 'hiredis', '~> 0.6.3'
-
 # functionality
 gem 'stringex', '~> 2.8', require: 'stringex_lite'
 gem 'http', '~> 5.0'

Gemfile.lock

@@ -182,7 +182,6 @@ GEM
       haml (>= 4.0.6)
       railties (>= 5.1)
     hashie (5.0.0)
-    hiredis (0.6.3)
     http (5.2.0)
       addressable (~> 2.8)
       base64 (~> 0.1)
@@ -380,10 +379,6 @@ GEM
     rdoc (6.7.0)
       psych (>= 4.0.0)
     redcarpet (3.6.0)
-    redis (5.3.0)
-      redis-client (>= 0.22.0)
-    redis-client (0.22.2)
-      connection_pool
     regexp_parser (2.9.2)
     reline (0.5.11)
       io-console (~> 0.5)
@@ -472,6 +467,10 @@ GEM
       activejob (>= 7.2)
       activerecord (>= 7.2)
       railties (>= 7.2)
+    solid_cache (1.0.6)
+      activejob (>= 7.2)
+      activerecord (>= 7.2)
+      railties (>= 7.2)
     solid_queue (1.0.1)
       activejob (>= 7.1)
       activerecord (>= 7.1)
@@ -563,7 +562,6 @@ DEPENDENCIES
   flamegraph
   friendly_id (~> 5.5.0)
   haml-rails (~> 2.0)
-  hiredis (~> 0.6.3)
   http (~> 5.0)
   ipaddress!
   kaminari
@@ -586,7 +584,6 @@ DEPENDENCIES
   rails-patterns
   rails-pg-extras
   redcarpet
-  redis
   rgl
   rouge
   rspec-rails
@@ -596,6 +593,7 @@ DEPENDENCIES
   silencer
   simple_form (~> 5.3)
   solid_cable
+  solid_cache
   solid_queue
   sqlite3
   stackprof

Makefile

@@ -36,8 +36,10 @@ console: .makerc-vars ## Open rails console
 logs: .makerc-vars ## Tail all logs
 	$(SUDO_COMMAND) docker compose -f docker/$(DEPLOY_ENVIRONMENT)/docker-compose.yml logs -f --tail=100
 
-clear-redis: .makerc-vars ## Clear rails cache (by flushing redis)
-	$(SUDO_COMMAND) docker compose -f docker/$(DEPLOY_ENVIRONMENT)/docker-compose.yml exec redis redis-cli flushdb
+clear-redis: clear-cache # dummy until migrated
+
+clear-cache: .makerc-vars ## Clear rails cache
+	$(SUDO_COMMAND) docker compose -f docker/$(DEPLOY_ENVIRONMENT)/docker-compose.yml exec web bin/rails r 'Rails.cache.clear'
 
 import-db:
 	$(SUDO_COMMAND) docker compose -f docker/$(DEPLOY_ENVIRONMENT)/docker-compose.yml up -d postgresql --wait
@@ -51,4 +53,4 @@ CURRENT_VERSION:
 .makerc-vars:
 	@echo "\033[93m[*] Configuration file missing, running configurator\033[0m"
 	@python3 scripts/generate_config.py
-	@if [ -f ".makerc-vars" ]; then echo "\033[92m[*] Config file created, please rerun the task!\033[0m"; false; else echo "\033[91m[*] Config file was not created, please rerun the task!\033[0m"; false; fi
+	@if [ -f ".makerc-vars" ]; then echo "\033[92m[*] Config file created, please rerun the task!\033[0m"; false; else echo "\033[91m[*] Config file was not created, please rerun the task!\033[0m"; false; fi

README.md

@@ -61,7 +61,6 @@ Providentia is a [Ruby on Rails](https://github.com/rails/rails) based web appli
 
   Can be switched to any OpenID Connect provider
 
-- ~~Redis~~[Garnet](https://github.com/microsoft/garnet) for caching and session storage
 - [PostgreSQL](https://www.postgresql.org/)
 - [Rails](https://github.com/rails/rails) app
 - [Caddy](https://github.com/caddyserver/caddy) reverse proxy

config/cache.yml

@@ -0,0 +1,17 @@
+default: &default
+  store_options:
+    # Cap age of oldest cache entry to fulfill retention policies
+    # max_age: <%= 60.days.to_i %>
+    max_size: <%= 256.megabytes %>
+    namespace: <%= Rails.env %>
+
+development:
+  database: cache
+  <<: *default
+
+test:
+  <<: *default
+
+production:
+  database: cache
+  <<: *default

config/environments/development.rb

@@ -29,7 +29,7 @@
     config.action_controller.perform_caching = false
   end
 
-  config.cache_store = :redis_cache_store, { url: ENV.fetch('REDIS_URL') { 'redis://localhost:6379/1' } }
+  config.cache_store = :solid_cache_store
 
   # Store uploaded files on the local file system (see config/storage.yml for options).
   config.active_storage.service = :local

config/environments/production.rb

@@ -49,15 +49,7 @@
   config.active_support.report_deprecations = false
 
   # Replace the default in-process memory cache store with a durable alternative.
-  # config.cache_store = :mem_cache_store
-  config.cache_store = :redis_cache_store, {
-    url: ENV.fetch('REDIS_URL') { 'redis://localhost:6379/0' },
-
-    connect_timeout:    30,
-    read_timeout:       0.2,
-    write_timeout:      0.2,
-    reconnect_attempts: 1
-  }
+  config.cache_store = :solid_cache_store
 
   # Replace the default in-process and non-durable queuing backend for Active Job.
   config.active_job.queue_adapter = :solid_queue

db/cache_schema.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema[8.0].define(version: 1) do
+  create_table 'solid_cache_entries', force: :cascade do |t|
+    t.binary 'key', limit: 1024, null: false
+    t.binary 'value', limit: 536870912, null: false
+    t.datetime 'created_at', null: false
+    t.integer 'key_hash', limit: 8, null: false
+    t.integer 'byte_size', limit: 4, null: false
+    t.index ['byte_size'], name: 'index_solid_cache_entries_on_byte_size'
+    t.index ['key_hash', 'byte_size'], name: 'index_solid_cache_entries_on_key_hash_and_byte_size'
+    t.index ['key_hash'], name: 'index_solid_cache_entries_on_key_hash', unique: true
+  end
+end

docker/dev/docker-compose.yml

@@ -68,23 +68,9 @@ services:
       - KEYCLOAK_AVAILABILITYCHECK_TIMEOUT=30s
       - IMPORT_FILES='/config/*'
 
-  redis:
-    image: "redis:alpine"
-    volumes:
-      - "redis:/data"
-
-  garnet:
-    image: "ghcr.io/microsoft/garnet"
-    ulimits:
-      memlock: -1
-    volumes:
-      - garnetdata:/data
-
   web:
     depends_on:
       - "postgresql"
-      - "redis"
-      - "garnet"
     build:
       context: ../../
       dockerfile: Dockerfile
@@ -112,7 +98,6 @@ services:
       VITE_RUBY_PORT: 80
       VITE_RUBY_SKIP_PROXY: true
       DATABASE_URL: postgres://providentia:secret@postgresql/providentia?pool=5
-      REDIS_URL: redis://garnet:6379/0
       OIDC_ISSUER: http://keycloak.localhost/realms/Providentia
       OIDC_CLIENT_ID: Providentia
       OIDC_CLIENT_SECRET: 00000000-0000-0000-0000-000000000000
@@ -171,7 +156,5 @@ services:
 
 volumes:
   caddy_data:
-  redis:
   postgres_providentia:
   postgres_keycloak:
-  garnetdata:

docker/prod/docker-compose.yml

@@ -58,12 +58,6 @@ services:
       - POSTGRES_PASSWORD=secret
       - POSTGRES_DB=providentia
 
-  redis:
-    image: "redis:alpine"
-    restart: unless-stopped
-    volumes:
-      - "redis:/data"
-
   keycloak:
     image: bitnami/keycloak:25.0.4
     depends_on:
@@ -98,6 +92,5 @@ services:
       - IMPORT_FILES='/config/*'
 
 volumes:
-  redis: {}
   caddy_data: {}
   providentia_db: {}