使用 Spring 引導運行 Postgres 的預先存在的 Docker 容器接線

Question

我的目標是：使用運行 Postgres 數據庫的 Docker 容器。 使用此容器構建 Spring 服務和數據訪問層。 所有這些都在我的本地環境中。

我正在通過在 Docker 容器中設置 Postgres 數據庫。 我已經啟動並運行了容器。 我已經創建了表、視圖、觸發器、序列等。據我所知，它工作正常。 我可以使用 pgAdmin 進行連接。

我現在已經開始設置 Spring 引導、存儲庫、Model 和單個表的單元測試。 該測試僅將幾條記錄插入表中。 我嘗試了幾個示例、教程和博客。

當我使用 maven 為項目構建和測試時，我收到以下錯誤。

2020-08-10 16:01:49.407  INFO 83573 --- [           main] DeferredRepositoryInitializationListener : Triggering deferred initialization of Spring Data repositories…
2020-08-10 16:01:49.771  INFO 83573 --- [           main] DeferredRepositoryInitializationListener : Spring Data repositories initialized!
2020-08-10 16:01:49.789  INFO 83573 --- [           main] n.c.p.s.repository.VendorRepositoryTest  : Started VendorRepositoryTest in 6.623 seconds (JVM running for 7.917)
2020-08-10 16:01:49.932  INFO 83573 --- [           main] o.t.d.DockerClientProviderStrategy       : Loaded org.testcontainers.dockerclient.UnixSocketClientProviderStrategy from ~/.testcontainers.properties, will try it first
2020-08-10 16:01:50.660  INFO 83573 --- [           main] o.t.d.UnixSocketClientProviderStrategy   : Accessing docker with local Unix socket
2020-08-10 16:01:50.661  INFO 83573 --- [           main] o.t.d.DockerClientProviderStrategy       : Found Docker environment with local Unix socket (unix:///var/run/docker.sock)
2020-08-10 16:01:50.816  INFO 83573 --- [           main] org.testcontainers.DockerClientFactory   : Docker host IP address is localhost
2020-08-10 16:01:50.871  INFO 83573 --- [           main] org.testcontainers.DockerClientFactory   : Connected to docker: 
  Server Version: 19.03.12
  API Version: 1.40
  Operating System: Docker Desktop
  Total Memory: 1991 MB
2020-08-10 16:01:51.966  INFO 83573 --- [           main] org.testcontainers.DockerClientFactory   : Ryuk started - will monitor and terminate Testcontainers containers on JVM exit
2020-08-10 16:01:51.966  INFO 83573 --- [           main] org.testcontainers.DockerClientFactory   : Checking the system...
2020-08-10 16:01:51.967  INFO 83573 --- [           main] org.testcontainers.DockerClientFactory   : ✔︎ Docker server version should be at least 1.6.0
2020-08-10 16:01:52.131  INFO 83573 --- [           main] org.testcontainers.DockerClientFactory   : ✔︎ Docker environment should have more than 2GB free disk space
2020-08-10 16:01:52.154  INFO 83573 --- [           main] 🐳 [postgres:9.6.12]                     : Creating container for image: postgres:9.6.12
2020-08-10 16:01:52.254  INFO 83573 --- [           main] 🐳 [postgres:9.6.12]                     : Starting container with ID: 0c1ea5de4bc47651ac2ce02d1e85590a9165d9c31b7584ea1924d88fc85eeaad
2020-08-10 16:01:52.614  INFO 83573 --- [           main] 🐳 [postgres:9.6.12]                     : Container postgres:9.6.12 is starting: 0c1ea5de4bc47651ac2ce02d1e85590a9165d9c31b7584ea1924d88fc85eeaad
2020-08-10 16:01:57.539  INFO 83573 --- [           main] 🐳 [postgres:9.6.12]                     : Container postgres:9.6.12 started in PT7.619S
Hibernate: select nextval ('vendor_tbl_vendor_id_seq')
2020-08-10 16:01:57.587 ERROR 83573 --- [           main] o.h.engine.jdbc.spi.SqlExceptionHelper   : ERROR: relation "vendor_tbl_vendor_id_seq" does not exist
  Position: 17
Hibernate: select vendor0_.id as id1_0_, vendor0_.vendor_env as vendor_e2_0_, vendor0_.lpl_client_id as lpl_clie3_0_, vendor0_.public_key as public_k4_0_, vendor0_.secret_key as secret_k5_0_, vendor0_.vendor_name as vendor_n6_0_ from investor.vendor_tbl vendor0_
[ERROR] Tests run: 3, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 15.57 s <<< FAILURE! - in net.clouddeveloper.plaid.services.repository.VendorRepositoryTest
[ERROR] addVendor  Time elapsed: 8.052 s  <<< ERROR!
org.springframework.dao.InvalidDataAccessResourceUsageException: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
        at net.clouddeveloper.plaid.services.repository.VendorRepositoryTest.addVendor(VendorRepositoryTest.java:84)
Caused by: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
        at net.clouddeveloper.plaid.services.repository.VendorRepositoryTest.addVendor(VendorRepositoryTest.java:84)
Caused by: org.postgresql.util.PSQLException: 
ERROR: relation "vendor_tbl_vendor_id_seq" does not exist
  Position: 17
        at net.clouddeveloper.plaid.services.repository.VendorRepositoryTest.addVendor(VendorRepositoryTest.java:84)

[ERROR] validateDatabaseRunning  Time elapsed: 0.005 s  <<< ERROR!
java.lang.IllegalStateException: Mapped port can only be obtained after the container is started
        at net.clouddeveloper.plaid.services.repository.VendorRepositoryTest.performQuery(VendorRepositoryTest.java:56)
        at net.clouddeveloper.plaid.services.repository.VendorRepositoryTest.validateDatabaseRunning(VendorRepositoryTest.java:46)

根據我對錯誤的理解，Spring Boot 找不到表的順序，測試不能證明不能證明容器正在運行。

這是我創建圖像的方式：

docker run --name plaid_postgres2 --rm -d -p 54321:5432 -e POSTGRES_PASSWORD=postgres  -e POSTGRES_DB=ach  postgres 

這更多的是環境設置。

這是我設置應用程序屬性的方式：

# database connectivity
spring.jpa.open-in-view=true
spring.jpa.database=POSTGRESQL
spring.datasource.platform=org.hibernate.dialect.PostgreSQLDialect
spring.datasource.url=jdbc:postgresql://localhost:54321/ach
spring.datasource.username=postgres
spring.datasource.password=postgres
spring.datasource.driver-class-name=org.postgresql.Driver
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=none
spring.jpa.hibernate.use-new-id-generator-mappings=false
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true

這是實體聲明。 注意我在 Postgres 中為特定表使用了一個序列。

@Entity
@Table(schema = "investor", name="vendor_tbl")
public class Vendor  implements Serializable {


    private static final long serialVersionUID = -2343243243242432341L;
    @Id
    @Column(name="vendor_id")
    @SequenceGenerator(schema="investor",
                       name="vendor_tbl_vendor_id_seq",
                       sequenceName="vendor_tbl_vendor_id_seq",
                       allocationSize=1)
    @GeneratedValue(strategy = GenerationType.SEQUENCE,  generator="vendor_tbl_vendor_id_seq")
    private long vendor_id;

這是我的測試 Class：

public class VendorRepositoryTest {

    @Autowired
    private VendorRepository repository;


   @Container
    private static final PostgreSQLContainer postgresqlContainer = new PostgreSQLContainer()
            .withDatabaseName("ach")
            .withUsername("postgres")
            .withPassword("postgres");


    @Test
    @DisplayName("Validate Database is Running")
    void validateDatabaseRunning() throws Exception {
        ResultSet resultSet = performQuery(postgresqlContainer, "SELECT 1");
        resultSet.next();
        int result = resultSet.getInt(1);
        assertEquals(1, result);

        assertTrue(postgresqlContainer.isRunning());
    }

    private ResultSet performQuery(PostgreSQLContainer protgres, String query) throws SQLException {

        String jdbcURL = postgresqlContainer.getJdbcUrl();
        String userName = postgresqlContainer.getUsername();
        String password = postgresqlContainer.getPassword();
        Connection conn = DriverManager.getConnection(jdbcURL, userName, password);
        return conn.createStatement().executeQuery(query);

    }


    @Test
    @DisplayName("Test Find All Vendors")
    public void find_all_vendors() {
        Iterable<Vendor> vendors = repository.findAll();

        int numOfCities =4;
        assertThat(vendors).isEmpty(); //.hasSize(numOfCities);
    }

    @Test
    @DisplayName("Test Add Vendor")
    public void addVendor(){
        String clientID = "blahblahblah";
        String secret_key = "blahblah";
        String public_key = "blahblah";
        String environment = "blah";
        String vendor_name = "Russ Test";
        Vendor vendor1 = new Vendor(clientID, secret_key, public_key, environment, vendor_name);
        Vendor vendor2 = new Vendor(clientID, secret_key, public_key, environment, vendor_name);
        this.repository.save(vendor1);
        this.repository.save(vendor2);
    }


}

在尋找答案兩天后，我失去了如何解決的方向。 任何建議或指導將不勝感激。

謝謝，

拉斯

Answer 1

您不必使用 Dockerfile 但您需要定義並傳遞給 Docker 容器用戶名、密碼和數據庫名稱。 您也可以在運行命令中執行此操作：

docker run --rm --name postgresContainer -d -p 54320:5432 -e POSTGRES_PASSWORD=postgres -e POSTGRES_DB=yourDatabase postgres

默認用戶名是 postgres，因此您無需指定。 命令中的最后一個 postgres 單詞是圖像的名稱

我也以不同的方式調用 yourDatabase，因為我認為 postgres 中有一個名為 postgres 的默認數據庫。

運行上述命令后，您可以執行以下命令來檢查您的數據庫是否正在運行：

docker exec -it postgresContainer bash

su postgres

psql

\list

這將顯示所有可用的數據庫。 現在輸入：

\c yourDatabase

並且您已連接到 postgres Docker 中的數據庫。 隨意運行創建表/選擇或其他任何東西。

要退出只需鍵入\q並exit 2 次。 容器將繼續運行。

---

不要忘記更新您的 spring 屬性以匹配

spring.datasource.url=jdbc:postgresql://localhost:54320/yourDatabase
spring.datasource.username=postgres
spring.datasource.password=postgres

另外我認為您應該從 java 代碼中刪除schema參數，我從未使用過它，恐怕它會開始搜索“投資者”數據庫。