Deploy Java App to GAE Standard using Cloud Build

Question

I'm trying to deploy a Java application to GAE Standard using CloudBuilder.

My cloudbuild.yaml is as follows :

steps: - name: "gcr.io/cloud-builders/gcloud" args: ["app", "deploy"] timeout: "1600s"

I have an app.yaml ( which I'm not sure I need ), but the deployment always seems to be unable to find appengine-web.xml

I have a fairly standard Maven file structure, and appengine-web.xml is at src/main/webapp/WEB-INF/appengine-web.xml

I've had a whole load of errors, mostly to do with appengine-web.xml, the most recent being

ERROR: (gcloud.app.deploy) INVALID_ARGUMENT: WEB-INF/appengine-web.xml is required for this runtime.

Has anyone got this sort of build to work?

By the way, deploying using maven from my development machine works

mvn -D skipTests clean package appengine:deploy

Edit with further information.

I'm using Java 8

Target runtime is also Java 8

appengine-web.xml is as follows

<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
    <application>myapp-staging</application>
    <version>alpha-001</version>
    <threadsafe>true</threadsafe>
    <runtime>java8</runtime>

    <system-properties>
        <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
    </system-properties>

   <env-variables>
        <env-var name="ENDPOINTS_SERVICE_NAME" value="myapp-staging.appspot.com" />
    </env-variables>

</appengine-web-app>

I can successfully deploy to GAE with the following comand when run from my development machine

mvn -D skipTests clean package appengine:deploy

1)Which Java version are you using? 2)which is your target runtime? 3) can you share your xml file? 4)does mvn -D clean package appengine:deploy works? — Soni Sol
@guillaumeblaquiere : I think GAE standard expects a WAR file so I just use the maven-war-plugin and the google appengine-maven-plugin. — DaveH
The question of @JoséSoní are relevant because your runtime version is impacting on java packaging and deployment. WAR for Java 8 but (fat)Jar for JAVA11 and the app description haven't the same form and don't be place at the same directory. — guillaume blaquiere
@guillaumeblaquiere: I edited my question with responses to Jose's questions. I'm not sure about the target runtime - I assume its Java8 but I'm not sure how to specify it. — DaveH

guillaume blaquiere guillaume blaquiere · Accepted Answer · 2019-10-03T12:59:38

For Java 8 runtime, you have to use the maven command.

Try this step

steps:
  - name: "gcr.io/cloud-builders/mvn"
    args: ["-D", "skipTests", "clean", "package", "appengine:deploy"]

Let me know if it works.

Else, you can switch to Java11 runtime if you don't use App Engine Java8 special flavor.

Deploy Java App to GAE Standard using Cloud Build

1 Answers