Question

我已经构建了一个简单的Vapor 3 API，我想将其部署在Heroku上。我希望它得到一个PostgreSQL数据库的支持，该数据库也已附加到另一个Heroku应用程序（我已成功将数据库附加到Heroku仪表板中，并且该数据库在其他应用程序中可以正常工作）。但是，我的Vapor应用程序从未完成启动，崩溃并出现以下错误：

Fatal error: Error raised at top level: ⚠️ PostgreSQL Error: no pg_hba.conf entry for host "[the IP addr]", user "[heroku postgres username here]", database "[heroku psql db here]", SSL off
- id: PostgreSQLError.server.fatal.ClientAuthentication

我使用vapor heroku init来设置Heroku应用。我在Google周围搜索，并尝试添加Procfile并与configure.swift混为一谈，但到目前为止还算不上什么。这是我能想到的所有相关文件：

Procfile：

web: Run serve --env production --hostname 0.0.0.0 --port $PORT --config:postgresql.url $DATABASE_URL

configure.swift：

import FluentPostgreSQL
import Vapor

/// Called before your application initializes.
public func configure(_ config: inout Config, _ env: inout Environment, _ services: inout Services) throws {
    /// Register providers first
    try services.register(FluentPostgreSQLProvider())

    var contentConfig = ContentConfig.default()

    /// Create custom JSON encoder
    let jsonEncoder = JSONEncoder()
    if #available(OSX 10.12, *) {
        jsonEncoder.dateEncodingStrategy = .iso8601
    } else {
        jsonEncoder.dateEncodingStrategy = .millisecondsSince1970
    }
//    jsonEncoder.keyEncodingStrategy = .convertToSnakeCase

    /// Register JSON encoder and content config
    contentConfig.use(encoder: jsonEncoder, for: .json)
    services.register(contentConfig)

    /// Register routes to the router
    let router = EngineRouter.default()
    try routes(router)
    services.register(router, as: Router.self)

    /// Register middleware
    var middlewares = MiddlewareConfig() // Create _empty_ middleware config
    /// middlewares.use(FileMiddleware.self) // Serves files from `Public/` directory
    middlewares.use(ErrorMiddleware.self) // Catches errors and converts to HTTP response
    services.register(middlewares)

    // Configure a database
    let dbConfig: PostgreSQLDatabaseConfig
    if let url = Environment.get("DATABASE_URL"), let psqlConfig = PostgreSQLDatabaseConfig(url: url) {
        dbConfig = psqlConfig
    } else {
        dbConfig = PostgreSQLDatabaseConfig(hostname: "localhost", port: 5432, username: "admin", database: "development", password: nil)
    }
    let postgresql = try PostgreSQLDatabase(config: dbConfig)

    /// Register the configured SQLite database to the database config.
    var databases = DatabasesConfig()
    databases.add(database: postgresql, as: .psql)
    services.register(databases)

    /// Configure migrations
    var migrations = MigrationConfig()
    migrations.add(model: Visit.self, database: .psql)
    services.register(migrations)
}

Package.swift：

// swift-tools-version:4.0
import PackageDescription

let package = Package(
    name: "SubwayNyc",
    dependencies: [
        //  A server-side Swift web framework.
        .package(url: "https://github.com/vapor/vapor.git", from: "3.0.0"),

        //  Swift ORM (queries, models, relations, etc) built on PostgreSQL.
        .package(url: "https://github.com/vapor/fluent-postgresql.git", from: "1.0.0"),

        .package(url: "https://github.com/vapor/sql.git", from: "2.1.0")
    ],
    targets: [
        .target(name: "App", dependencies: ["FluentPostgreSQL", "Vapor"]),
        .target(name: "Run", dependencies: ["App"]),
        .testTarget(name: "AppTests", dependencies: ["App"])
    ]
)

如何使PostgreSQL连接到Heroku上的Vapor 3应用程序？

Answer 1

原始错误是这里的关键，尤其是：SSL off。

当客户端尝试不使用SSL进行连接时，Heroku Postgres会引发此错误。我自己不熟悉Vapor，但快速浏览一下即可发现configure.swift是您可以进行配置更改的地方。从客户端启用SSL后，您应该可以连接到该数据库实例而不会出现问题。

Answer 2

对于Heroku，我们需要未验证的TLS传输。

https://api.vapor.codes/postgresql/latest/PostgreSQL/Classes/PostgreSQLConnection/TransportConfig.html

let pgURL = Environment.get("DATABASE_URL") ?? "postgres://user:password@host:port/database"

let pgConfig = PostgreSQLDatabaseConfig(url: pgURL, transport: PostgreSQLConnection.TransportConfig.unverifiedTLS)!

：D

在Heroku上使用Vapor 3配置PostgreSQL DB

2 个答案: