Add support for empty password in bitnami/postgresql

Signed-off-by: He Zean <[email protected]>

Author: hezean

spring-boot-project/spring-boot-docker-compose/src/dockerTest/java/org/springframework/boot/docker/compose/service/connection/postgres/PostgresJdbcDockerComposeConnectionDetailsFactoryIntegrationTests.java

@@ -35,6 +35,7 @@
  * @author Andy Wilkinson
  * @author Phillip Webb
  * @author Scott Frederick
+ * @author He Zean
  */
 class PostgresJdbcDockerComposeConnectionDetailsFactoryIntegrationTests {
 
@@ -57,6 +58,16 @@ void runWithBitnamiImageCreatesConnectionDetails(JdbcConnectionDetails connectio
 		assertConnectionDetails(connectionDetails);
 	}
 
+	@DockerComposeTest(composeFile = "postgres-bitnami-empty-password-compose.yaml",
+			image = TestImage.BITNAMI_POSTGRESQL)
+	void runWithBitnamiImageCreatesConnectionDetailsWithAllowEmptyPassword(JdbcConnectionDetails connectionDetails)
+			throws ClassNotFoundException {
+		assertThat(connectionDetails.getUsername()).isEqualTo("myuser");
+		assertThat(connectionDetails.getPassword()).isEmpty();
+		assertThat(connectionDetails.getJdbcUrl()).startsWith("jdbc:postgresql://").endsWith("/mydatabase");
+		checkDatabaseAccess(connectionDetails);
+	}
+
 	@DockerComposeTest(composeFile = "postgres-application-name-compose.yaml", image = TestImage.POSTGRESQL)
 	void runCreatesConnectionDetailsApplicationName(JdbcConnectionDetails connectionDetails)
 			throws ClassNotFoundException {

spring-boot-project/spring-boot-docker-compose/src/dockerTest/java/org/springframework/boot/docker/compose/service/connection/postgres/PostgresR2dbcDockerComposeConnectionDetailsFactoryIntegrationTests.java

@@ -37,6 +37,7 @@
  * @author Andy Wilkinson
  * @author Phillip Webb
  * @author Scott Frederick
+ * @author He Zean
  */
 class PostgresR2dbcDockerComposeConnectionDetailsFactoryIntegrationTests {
 
@@ -61,6 +62,17 @@ void runWithBitnamiImageCreatesConnectionDetails(R2dbcConnectionDetails connecti
 		assertConnectionDetails(connectionDetails);
 	}
 
+	@DockerComposeTest(composeFile = "postgres-bitnami-empty-password-compose.yaml",
+			image = TestImage.BITNAMI_POSTGRESQL)
+	void runWithBitnamiImageCreatesConnectionDetailsWithAllowEmptyPassword(R2dbcConnectionDetails connectionDetails) {
+		ConnectionFactoryOptions connectionFactoryOptions = connectionDetails.getConnectionFactoryOptions();
+		assertThat(connectionFactoryOptions.getRequiredValue(ConnectionFactoryOptions.USER)).isEqualTo("myuser");
+		assertThat(connectionFactoryOptions.getValue(ConnectionFactoryOptions.PASSWORD)).isNull();
+		assertThat(connectionFactoryOptions.getRequiredValue(ConnectionFactoryOptions.DATABASE))
+			.isEqualTo("mydatabase");
+		checkDatabaseAccess(connectionDetails);
+	}
+
 	@DockerComposeTest(composeFile = "postgres-application-name-compose.yaml", image = TestImage.POSTGRESQL)
 	void runCreatesConnectionDetailsApplicationName(R2dbcConnectionDetails connectionDetails) {
 		assertConnectionDetails(connectionDetails);

spring-boot-project/spring-boot-docker-compose/src/dockerTest/resources/org/springframework/boot/docker/compose/service/connection/postgres/postgres-bitnami-empty-password-compose.yaml

@@ -0,0 +1,9 @@
+services:
+  database:
+    image: '{imageName}'
+    ports:
+      - '5432'
+    environment:
+      - 'POSTGRESQL_USERNAME=myuser'
+      - 'POSTGRESQL_DATABASE=mydatabase'
+      - 'ALLOW_EMPTY_PASSWORD=yes'

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/service/connection/postgres/PostgresEnvironment.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.docker.compose.service.connection.postgres;
 
 import java.util.Map;
+import java.util.Objects;
 
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
@@ -49,15 +50,20 @@ private String extractPassword(Map<String, String> env) {
 			return null;
 		}
 		String password = env.getOrDefault("POSTGRES_PASSWORD", env.get("POSTGRESQL_PASSWORD"));
-		Assert.state(StringUtils.hasLength(password), "PostgreSQL password must be provided");
-		return password;
+		Assert.state(isAllowEmptyPassword(env) || StringUtils.hasLength(password),
+				"PostgreSQL password must be provided");
+		return Objects.requireNonNullElse(password, "");
 	}
 
 	private boolean isUsingTrustHostAuthMethod(Map<String, String> env) {
 		String hostAuthMethod = env.get("POSTGRES_HOST_AUTH_METHOD");
 		return "trust".equals(hostAuthMethod);
 	}
 
+	private boolean isAllowEmptyPassword(Map<String, String> env) {
+		return env.containsKey("ALLOW_EMPTY_PASSWORD");
+	}
+
 	String getUsername() {
 		return this.username;
 	}

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/service/connection/postgres/PostgresEnvironmentTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -85,6 +85,12 @@ void getPasswordWhenHasTrustHostAuthMethod() {
 		assertThat(environment.getPassword()).isNull();
 	}
 
+	@Test
+	void getPasswordWhenHasNoPasswordAndAllowEmptyPassword() {
+		PostgresEnvironment environment = new PostgresEnvironment(Map.of("ALLOW_EMPTY_PASSWORD", "yes"));
+		assertThat(environment.getPassword()).isEmpty();
+	}
+
 	@Test
 	void getDatabaseWhenNoPostgresDbOrPostgresUser() {
 		PostgresEnvironment environment = new PostgresEnvironment(Map.of("POSTGRES_PASSWORD", "secret"));