GitHub 操作无法连接到 MongoDB 服务

Question

我在使用 GitHub 操作运行自动化测试时遇到问题。我不明白为什么我无法连接到运行集成测试的 MongoDB 服务。我尝试了不同的主机：localhost、127.0.0.1、0.0.0.0，但它们都无法连接数据库。

它在我的 docker 设置中运行得很好，但由于某种原因不能与 GitHub 操作一起运行。

    name: CI master
    
    on: [push, pull_request]
    
    env:
      RUST_BACKTRACE: 1
      CARGO_TERM_COLOR: always
      APP_ENV: development
      APP_MONGO_USER: test
      APP_MONGO_PASS: password
      APP_MONGO_DB: test
    
    jobs:
      # Run tests
      test:
        name: Test
        runs-on: ubuntu-latest
        services:
          mongo:
            image: mongo
            env:
              MONGO_INITDB_ROOT_USERNAME: ${APP_MONGO_USER}
              MONGO_INITDB_ROOT_PASSWORD: ${APP_MONGO_PASS}
              MONGO_INITDB_DATABASE: ${APP_MONGO_DB}
            ports:
              - 27017:27017
        steps:
          - uses: actions/checkout@v2
          - uses: actions-rs/toolchain@v1
            with:
              profile: minimal
              toolchain: stable
              override: true
          - uses: actions-rs/cargo@v1
            with:
              command: test

配置文件（development.toml）。

[application]
host = "127.0.0.1"
port = 8080

连接到数据库。环境变量和配置文件被合并，我通过 config: &Settings 在这里访问它们。

[application]
host = "127.0.0.1"
port = 8080

调用初始化函数。

pub async fn init(config: &Settings) -> Result<Database> {
    let client_options = ClientOptions::parse(
        format!(
            "mongodb://{}:{}@{}:27017",
            config.mongo.user, config.mongo.pass, config.application.host
        )
        .as_str(),
    )
    .await?;

    let client = Client::with_options(client_options)?;
    let database = client.database("test"); // TODO: replace with env var

    database.run_command(doc! {"ping": 1}, None).await?;
    println!("Connected successfully.");

    Ok(database)
}

我得到的错误。

thread 'health_check' panicked at 'Failed to init mongo: Error { kind: ServerSelectionError { message: "Server selection timeout: No available servers. Topology: { Type: Unknown, Servers: [ { Address: 127.0.0.1:27017, Type: Unknown, Error: Connection refused (os error 111) }, ] }" }, labels: [] }', tests/health_check.rs:31:44

Answer 1

我最终通过在我的服务中添加健康检查来解决这个问题。看来我的问题与运行测试之前我的数据库尚未启动有关。

services:
          mongodb:
              image: mongo
              env:
                MONGO_INITDB_ROOT_USERNAME: test
                MONGO_INITDB_ROOT_PASSWORD: password
                MONGO_INITDB_DATABASE: test
              options: >-
                --health-cmd mongo
                --health-interval 10s
                --health-timeout 5s
                --health-retries 5
              ports:
                - 27017:27017