Spring boot Google AppEngine-自动部署到应用程序引擎失败

我有一个springboot应用程序，我想自动部署到appengine。我不想创建docker映像，然后部署它。由于“未找到云SDK错误”，生成失败

[ERROR] Failed to execute goal com.google.cloud.tools:appengine-maven-plugin:1.3.2:deploy (default-cli) on project location-finder-rest-api: Execution default-cli of goal com.google.cloud.tools:appengine-maven-plugin:1.3.2:deploy failed: The Google Cloud SDK could not be found in the customary locations and no path was provided. 

我当时遵守了所有的指导方针

根据文档，app.yaml文件创建于src/main/appengine。app.yaml的内容是

# [START runtime]
runtime: java
env: flex

handlers:
- url: /.*
  script: this field is required, but ignored

runtime_config:  # Optional
  jdk: openjdk8

manual_scaling:
  instances: 1
# [END runtime]

为了触发构建，我必须指定cloudbuild.yaml文件。该文件的内容包括：

steps:
- name: 'gcr.io/cloud-builders/mvn'
  args: ['appengine:deploy','-Pprod']

cloud builder的官方文档建议使用“安装”作为mvn步骤的参数。但此步骤不会部署应用程序

---

我是否缺少任何配置？

在引擎盖下，

appengine:deploy

目标使用云SDK实际部署你的应用程序。它不是由

gcr.io/cloud builders/mvn

映像提供的（每个云构建步骤都在自己的容器中运行）

您可以使用单独的构建步骤来安装和部署应用程序，例如：

steps:
- name: 'gcr.io/cloud-builders/mvn'
  args: ['install']
- name: 'gcr.io/cloud-builders/gcloud'
  args: ['app', 'deploy'] 

---

它通过对LundinCast提出的上述解决方案进行轻微修改而起作用。此外，appengine maven插件需要更新为2.0.0+。此版本自动下载必要的依赖项

steps:
- id: 'Stage app using mvn appengine plugin on mvn cloud build image'
  name: 'gcr.io/cloud-builders/mvn'
  args: ['package', 'appengine:stage', '-Pprod']
- id: "Deploy to app engine using gcloud image"
  name: 'gcr.io/cloud-builders/gcloud'
  args: ['app', 'deploy', 'target/appengine-staging/app.yaml']