如何处理 Azure 应用服务部署中的长启动时间

问题描述 投票：0回答：1

我正在将 Spring Boot 应用程序部署到 Azure 应用程序服务。此应用程序连接到配置为使用 Flyway 迁移的数据库。

当尝试发布我的最新版本时，我有一个飞路迁移脚本需要很长时间才能完成。这是预料之中的，因为我正在使用一个非常大的数据库，并且迁移脚本正在运行一些大量的查询。

不幸的是，我无法完成此飞路迁移，因为应用程序将在 5 分钟后自动重新启动，导致迁移过程崩溃并切断与数据库的连接。发生这种情况是因为它认为启动序列已失败，而迁移仍在进行中。

我在部署日志中收到错误：

Starting container for site
INFO  - docker run (... my site info)
ERROR - Container xxx for site yyy did not start within expected time limit. Elapsed time = 230.8677441 sec

我相信这是预期的行为，因为部署过程正在等待应用程序返回成功的运行状况检查，然后再考虑它是否已启动。迁移正在进行时，应用程序未启动且不响应任何运行状况检查。

我尝试将 WEBSITES_CONTAINER_START_TIME_LIMIT 环境变量设置为允许的最大值 1800 秒（30 分钟）。但这还不足以让我的迁移完全完成，迁移过程会在 30 分钟后终止，导致整个部署失败。

在 Azure 终止应用程序之前，我应该如何继续为应用程序分配更多时间来执行迁移？

非常感谢

spring-boot azure docker azure-web-app-service flyway
1个回答
0
投票

将 Flyway 迁移与应用程序启动分离。 在 CI/CD 管道中添加一个步骤，以便在将应用程序部署到 Azure Web 服务之前使用相同的映像运行 Flyway 迁移。

Azure DevOps 的管道步骤：

- task: Bash@3 displayName: "Run Flyway migrations" inputs: targetType: "inline" script: | docker run --rm \ -e FLYWAY_URL=jdbc:<db-url> \ -e FLYWAY_USER=<db-user> \ -e FLYWAY_PASSWORD=<db-password> \ <acr-name>.azurecr.io/<image-name>:<tag> \ flyway migrate 
专门为迁移目的标记映像，允许您部署应用程序而无需在启动期间运行迁移。


在
Dockerfile
中添加命令：


CMD ["java", "-Dspring.profiles.active=migration", "-jar", "app.jar"]

在 CI/CD 期间，使用 
migration
 配置文件拉取并运行映像，然后将其部署到 Azure。


docker run -e SPRING_PROFILES_ACTIVE=migration <acr-name>.azurecr.io/<image-name>:<tag>



    调整应用程序中的健康检查逻辑，以在迁移期间返回
  • 200 OK
    。例如，使用像 
    "migration in progress"
     这样的轻量级响应。
    

    • 

@RestController
public class HealthCheckController {
    @GetMapping("/health")
    public ResponseEntity<String> health() {
        if (migrationInProgress) {
            return ResponseEntity.ok("Migration in progress");
        }
        return ResponseEntity.ok("Healthy");
    }
}

如果 CI/CD 管道由于时间限制而无法容纳迁移，请在 
Azure 容器实例 (ACI) 中运行它们

az container create \
    --resource-group <resource-group> \
    --name db-migration \
    --image <acr-name>.azurecr.io/<image-name>:<tag> \
    --registry-login-server <acr-name>.azurecr.io \
    --registry-username <acr-username> \
    --registry-password <acr-password> \
    --command-line "java -Dspring.profiles.active=migration -jar app.jar"

管道日志
构建阶段：

2024-11-20 10:00:00 Starting job: Build
2024-11-20 10:00:01 Checking out repository...
> actions/checkout@v4
✓ Checked out repository code

2024-11-20 10:00:10 Setting up Java version...
> actions/setup-java@v1
✓ Set Java version to 17

2024-11-20 10:00:20 Building project with Maven...
$ mvn clean install
[INFO] Scanning for projects...
[INFO] 
[INFO] -----------------------< com.example:my-app >------------------------
[INFO] Building my-app 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:3.1.0:clean (default-clean) @ my-app ---
[INFO] Deleting /home/runner/work/my-app/target
[INFO] 
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ my-app ---
[INFO] Copying resources to /home/runner/work/my-app/target/classes
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ my-app ---
[INFO] Compiling 20 source files to /home/runner/work/my-app/target/classes
[INFO] 
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ my-app ---
[INFO] Copying resources to /home/runner/work/my-app/target/test-classes
[INFO] 
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ my-app ---
[INFO] Tests are passing
[INFO] 
[INFO] --- maven-jar-plugin:3.1.0:jar (default-jar) @ my-app ---
[INFO] Building jar: /home/runner/work/my-app/target/my-app-1.0-SNAPSHOT.jar
[INFO] 
[INFO] --- maven-install-plugin:2.5.2:install (default-install) @ my-app ---
[INFO] Installing /home/runner/work/my-app/target/my-app-1.0-SNAPSHOT.jar to local repository

[INFO] Build success
2024-11-20 10:05:00 Build completed successfully.

迁徙：

2024-11-20 10:05:10 Starting job: Migrations
2024-11-20 10:05:11 Pulling Docker image from ACR...
$ docker pull myacr.azurecr.io/my-app:latest
latest: Pulling from myacr.azurecr.io/my-app
Digest: sha256:abcdef1234567890
Status: Image is up to date for myacr.azurecr.io/my-app:latest

2024-11-20 10:05:30 Running Flyway migrations...
$ docker run --rm \
  -e FLYWAY_URL=jdbc:postgresql://mydb.postgres.database.azure.com:5432/mydatabase \
  -e FLYWAY_USER=myuser \
  -e FLYWAY_PASSWORD=mypassword \
  myacr.azurecr.io/my-app:latest \
  flyway migrate

2024-11-20 10:05:31 INFO  - Starting Flyway Command-Line Tool
2024-11-20 10:05:31 INFO  - Database: jdbc:postgresql://mydb.postgres.database.azure.com:5432/mydatabase (PostgreSQL 12)
2024-11-20 10:05:31 INFO  - Flyway Community Edition 9.0.0 by Redgate
2024-11-20 10:05:31 INFO  - Validating migrations ...
2024-11-20 10:05:32 INFO  - Successfully validated 5 migrations (execution time 00:01.001s)
2024-11-20 10:05:32 INFO  - Current version of schema `public`: 2.3
2024-11-20 10:05:32 INFO  - Migrating schema `public` to version 2.4 - add new indexes
2024-11-20 10:15:40 INFO  - Successfully applied migration to version 2.4 (execution time 00:10:08.123s)
2024-11-20 10:15:40 INFO  - Migrating schema `public` to version 2.5 - update large table
2024-11-20 10:45:45 INFO  - Successfully applied migration to version 2.5 (execution time 00:30:04.891s)
2024-11-20 10:45:45 INFO  - Successfully applied 2 migrations (execution time 00:40:15.015s)
2024-11-20 10:45:45 INFO  - Schema `public` is now at version 2.5
2024-11-20 10:45:45 INFO  - Migration completed successfully.

2024-11-20 10:46:00 Flyway migrations completed.

部署应用程序：

2024-11-20 10:46:10 Starting job: Deploy
2024-11-20 10:46:11 Downloading artifact from build job...
> actions/download-artifact@v3
Artifact 'java-app' downloaded successfully.

2024-11-20 10:46:20 Deploying to Azure Web App...
> azure/webapps-deploy@v2
[INFO] Using publish profile from secret.
[INFO] Deploying jar file: /home/runner/work/my-app/target/my-app-1.0-SNAPSHOT.jar to app 'sp-az-webapp'

2024-11-20 10:47:00 INFO  - Pulling image from ACR: myacr.azurecr.io/my-app:latest
2024-11-20 10:47:20 INFO  - Image pulled successfully
2024-11-20 10:47:25 INFO  - Deploying container to Azure Web App: sp-az-webapp
2024-11-20 10:47:30 INFO  - Starting container for site
2024-11-20 10:47:32 INFO  - Initiating container start-up
2024-11-20 10:47:40 INFO  - Waiting for site to become ready ...
2024-11-20 10:48:00 INFO  - Site is up and running
2024-11-20 10:48:00 INFO  - Deployment completed successfully.
Web App URL: https://sp-az-webapp.azurewebsites.net

    

	

    

    


  

  

    
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