Hardcode databases in CI

Author: finestructure

.github/workflows/ci.yml

@@ -31,20 +31,6 @@ jobs:
     container:
       image: registry.gitlab.com/finestructure/spi-base:1.1.1
       options: --privileged
-    services:
-      postgres:
-        image: postgres:16-alpine
-        env:
-          POSTGRES_DB: spi_test
-          POSTGRES_USER: spi_test
-          POSTGRES_PASSWORD: xxx
-        ports:
-          - '5432:5432'
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
     steps:
       - name: GH Runner bug workaround
         run: sysctl -w vm.mmap_rnd_bits=28
@@ -59,6 +45,113 @@ jobs:
           COLLECTION_SIGNING_PRIVATE_KEY: ${{ secrets.COLLECTION_SIGNING_PRIVATE_KEY }}
           DATABASE_HOST: postgres
           DATABASE_PORT: '5432'
+    services:
+      # Make sure the ports expose here (6000-60007) align with the ports
+      # hard-coded in DatabasePool.runningDatabases().
+      db-0:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6000:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      db-1:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6001:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      db-2:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6002:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      db-3:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6003:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      db-4:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6004:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      db-5:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6005:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      db-6:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6006:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      db-7:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_DB: spi_test
+          POSTGRES_USER: spi_test
+          POSTGRES_PASSWORD: xxx
+        ports:
+          - '6007:5432'
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
 
   release-build-linux:
     name: Release build

Tests/AppTests/Helpers/DatabasePool.swift

@@ -99,13 +99,20 @@ actor DatabasePool {
     }
 
     private func runningDatabases() async throws -> [Database] {
-        let stdout = try await ShellOut.shellOut(to: .getContainerNames).stdout
-        return stdout
-            .components(separatedBy: "\n")
-            .filter { $0.starts(with: "spi_test_") }
-            .map { String($0.dropFirst("spi_test_".count)) }
-            .compactMap(Int.init)
-            .map(Database.init(port:))
+        if isRunningInCI() {
+            // We don't have docker available in CI to probe for running dbs.
+            // Instead, we have a hard-coded list of dbs we launch in the GH workflow
+            // file and correspondingly, we hard-code their ports here.
+            return (6000..<6008).map(Database.init)
+        } else {
+            let stdout = try await ShellOut.shellOut(to: .getContainerNames).stdout
+            return stdout
+                .components(separatedBy: "\n")
+                .filter { $0.starts(with: "spi_test_") }
+                .map { String($0.dropFirst("spi_test_".count)) }
+                .compactMap(Int.init)
+                .map(Database.init(port:))
+        }
     }
 
     private func retainDatabase() async throws -> Database {