I follow the same step but failed in the deployment part.

[junnyea]

Updating service [springboot]...
...................................failed.
ERROR: (gcloud.app.deploy) Error Response: [13] Deployment Manager operation failed, name: operation-1508163412532-55baaa8779b21-614c60ac-78c48220, error: [{"code":"RESOURCE_ERROR","location":"/deployments/aef-springboot-20171016t221527/resources/aef-springboot-20171016t221527-hcs","message":"{"ResourceType":"compute.v1.httpsHealthCheck","ResourceErrorCode":"400","ResourceErrorMessage":{"code":400,"errors":[{"domain":"global","message":"Invalid value for field 'resource.checkIntervalSec': '0'. Must be greater than or equal to 1","reason":"invalid"},{"domain":"global","message":"Invalid value for field 'resource.timeoutSec': '0'. Must be greater than or equal to 1","reason":"invalid"},{"domain":"global","message":"Invalid value for field 'resource.unhealthyThreshold': '0'. Must be greater than or equal to 1","reason":"invalid"},{"domain":"global","message":"Invalid value for field 'resource.healthyThreshold': '0'. Must be greater than or equal to 1","reason":"invalid"}],"message":"Invalid value for field 'resource.checkIntervalSec': '0'. Must be greater than or equal to 1","statusMessage":"Bad Request","requestPath":"https://www.googleapis.com/compute/v1/projects/test-gradle-183004/global/httpsHealthChecks","httpMethod":"POST"}}"}, {"code":"RESOURCE_ERROR","location":"/deployments/aef-springboot-20171016t221527/resources/aef-springboot-20171016t221527-00ahs","message":"{"ResourceType":"compute.v1.httpsHealthCheck","ResourceErrorCode":"400","ResourceErrorMessage":{"code":400,"errors":[{"domain":"global","message":"Invalid value for field 'resource.checkIntervalSec': '0'. Must be greater than or equal to 1","reason":"invalid"},{"domain":"global","message":"Invalid value for field 'resource.timeoutSec': '0'. Must be greater than or equal to 1","reason":"invalid"},{"domain":"global","message":"Invalid value for field 'resource.unhealthyThreshold': '0'. Must be greater than or equal to 1","reason":"invalid"},{"domain":"global","message":"Invalid value for field 'resource.healthyThreshold': '0'. Must be greater than or equal to 1","reason":"invalid"}],"message":"Invalid value for field 'resource.checkIntervalSec': '0'. Must be greater than or equal to 1","statusMessage":"Bad Request","requestPath":"https://www

[loosebazooka]

This is quite an old sample, and I have not tested it in some time. Was there some documentation that lead you here?

[loosebazooka]

@meltsufin might be able to help.