3d2bbb9da4
Change-Id: Id3f777a0619acacd3906e22132b95f22e3ca585c |
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---|---|---|
channel | ||
datastore | ||
delay | ||
demos | ||
file | ||
image | ||
internal | ||
log | ||
memcache | ||
module | ||
remote_api | ||
search | ||
taskqueue | ||
urlfetch | ||
user | ||
xmpp | ||
LICENSE | ||
README.md | ||
appengine.go | ||
appengine_test.go | ||
errors.go | ||
identity.go | ||
namespace.go | ||
namespace_test.go | ||
timeout.go | ||
timeout_test.go |
README.md
Go App Engine for Managed VMs
This repository supports the Go runtime for Managed VMs on App Engine.
It provides APIs for interacting with App Engine services.
Its canonical import path is google.golang.org/appengine
.
See https://developers.google.com/cloud/managed-vms for more information.
Directory structure
The top level directory of this repository is the appengine
package. It
contains the
basic types (e.g. appengine.Context
) that are used across APIs. Specific API
packages are in subdirectories (e.g. datastore
).
There is an internal
subdirectory that contains service protocol buffers,
plus packages required for connectivity to make API calls. App Engine apps
should not directly import any package under internal
.
Updating a Go App Engine app
This section describes how to update a traditional Go App Engine app to run on Managed VMs.
1. Update YAML files
The app.yaml
file (and YAML files for modules) should have these new lines added:
vm: true
manual_scaling:
instances: 1
See https://developers.google.com/appengine/docs/go/modules/#Go_Instance_scaling_and_class for details.
2. Update import paths
The import paths for App Engine API packages need to be made relative to google.golang.org/appengine
.
You can do that manually, or by running this command to recursively update all Go source files in the current directory:
(may require GNU sed)
sed -i '/"appengine/{s,"appengine,"google.golang.org/appengine,;s,appengine_,appengine/,}' \
$(find . -name '*.go')
3. Update code using deprecated, removed or modified APIs
Most App Engine services are available with exactly the same API. A few APIs were cleaned up, and some are not available yet. This list summarises the differences:
appengine.Datacenter
now takes anappengine.Context
argument.datastore.PropertyLoadSaver
has been simplified to use slices in place of channels.search.FieldLoadSaver
now handles document metadata.taskqueue.QueueStats
no longer takes a maxTasks argument. That argument has been deprecated and unused for a long time.appengine/aetest
,appengine/blobstore
,appengine/cloudsql
andappengine/runtime
have not been ported yet.appengine.BackendHostname
andappengine.BackendInstance
were for the deprecated backends feature. Useappengine.ModuleHostname
andappengine.ModuleName
instead.appengine.IsCapabilityDisabled
andappengine/capability
are obsolete.- Most of
appengine/file
is deprecated. Use Google Cloud Storage instead. appengine/socket
is deprecated. Use the standardnet
package instead.