The following list shows which services are supported in second-generation runtimes:
| App Engine service | Availability in Go | Alternatives |
|---|---|---|
|
App Identity
|
Available | Migrate to Open ID Connect (OIDC) or Identity Platform |
|
Datastore
|
Available | Migrate to Datastore client libraries
or use the community-contributed datastore
library
|
|
Mail
|
Available | Migrate to SendGrid , Mailgun , or Mailjet for outbound messaging only |
|
Memcache
|
Available | Migrate to Memorystore |
|
Modules
|
Available | Use environment variables and the App Engine Admin API to obtain information and modify your application's running services |
|
Remote
|
Not supported | Use Cloud Client Libraries to access resources in other projects |
|
Task Queues
|
Available | Migrate to Cloud Tasks for push queues |
|
URL Fetch
|
Available | Migrate to standard libraries for outbound requests |
|
Users
|
Available | Migrate to user authentication options |
For more information, refer to the user guides located on the left-side navigation or see the API reference documentation .
