Add redis cache

Package.swift

@@ -48,6 +48,7 @@ let package = Package(
         .package(url: "https://github.com/vapor/fluent-postgres-driver.git", from: "2.0.0"),
         .package(url: "https://github.com/vapor/fluent.git", from: "4.0.0"),
         .package(url: "https://github.com/vapor/jwt-kit.git", from: "4.13.0"),
+        .package(url: "https://github.com/vapor/redis.git", from: "4.0.0"),
         .package(url: "https://github.com/vapor/vapor.git", from: "4.102.0"),
     ],
     targets: [
@@ -71,6 +72,7 @@ let package = Package(
                     .product(name: "Fluent", package: "fluent"),
                     .product(name: "FluentPostgresDriver", package: "fluent-postgres-driver"),
                     .product(name: "Parsing", package: "swift-parsing"),
+                    .product(name: "Redis", package: "redis"),
                     .product(name: "ShellOut", package: "ShellOut"),
                     .product(name: "SwiftPMDataModel-auto", package: "swift-package-manager"),
                     .product(name: "SwiftPMPackageCollections", package: "swift-package-manager"),

Sources/App/configure.swift

@@ -14,8 +14,10 @@
 
 import Fluent
 import FluentPostgresDriver
+import Redis
 import Vapor
 
+
 @discardableResult
 public func configure(_ app: Application) async throws -> String {
     #if DEBUG && os(macOS)
@@ -49,6 +51,7 @@ public func configure(_ app: Application) async throws -> String {
     // This parameter could also be made configurable via an env variable.
     let maxConnectionsPerEventLoop = 3
 
+    // Setup database connection
     guard
         let host = Environment.get("DATABASE_HOST"),
         let port = Environment.get("DATABASE_PORT").flatMap(Int.init),
@@ -75,6 +78,13 @@ public func configure(_ app: Application) async throws -> String {
                                 sqlLogLevel: .debug),
                       as: .psql)
 
+    // Setup Redis connection
+    do {
+        app.redis.configuration = try RedisConfiguration(hostname: "redis")
+    } catch {
+        app.logger.warning("Failed to configure Redis, caching disabled. Error: \(error)")
+    }
+
     do {  // Migration 001 - schema 1.0
         app.migrations.add(CreatePackage())
         app.migrations.add(CreateRepository())

app.yml

@@ -161,23 +161,38 @@ services:
       - backend
 
   alerting:
-      image: registry.gitlab.com/finestructure/swiftpackageindex:${VERSION}
-      <<: *shared
-      depends_on:
-        - migrate
-      entrypoint: ["/bin/bash"]
-      command: ["-c", "--",
+    image: registry.gitlab.com/finestructure/swiftpackageindex:${VERSION}
+    <<: *shared
+    depends_on:
+      - migrate
+    entrypoint: ["/bin/bash"]
+    command: ["-c", "--",
         "trap : TERM INT; while true; do ./Run alerting --env ${ENV} --time-period ${ALERTING_TIME_PERIOD:-4} --limit ${ALERTING_LIMIT:-2000}; sleep ${ALERTING_SLEEP:-300}; done"
-      ]
-      deploy:
-        resources:
-          limits:
-            memory: 0.5GB
-        restart_policy:
+    ]
+    deploy:
+      resources:
+        limits:
+          memory: 0.5GB
+      restart_policy:
           max_attempts: 5
-      networks:
-        - backend
+    networks:
+      - backend
 
+  redis:
+    # Eventually we'll probably want to use redis/redis-stack-server:7.4.0-v1 here,
+    # which excludes the RedisInsight GUI front-end.
+    image: redis/redis-stack:7.4.0-v1
+    environment:
+      REDIS_ARGS: '--maxmemory 4GB --maxmemory-policy allkeys-lru'
+    ports:
+      - '6379:6379'
+      - '8001:8001'
+    deploy:
+      resources:
+        limits:
+          memory: 4.2GB
+    networks:
+      - backend
 
   migrate:
     image: registry.gitlab.com/finestructure/swiftpackageindex:${VERSION}