Runs Go on OpenShift using downloadable cartridge support. To install to OpenShift from the CLI (you'll need version 1.9 or later of rhc), run:
rhc create-app mygo https://cartreflect-claytondev.rhcloud.com/reflect?github=smarterclayton/openshift-go-cart
Once the app is created, you'll need to create and add a ".godir" file in your repo to tell the cartridge what the package of your Go code is. A typical .godir file might contain:
github.com/smarterclayton/goexample
which would tell OpenShift to place all of the files in the root of the Git repository inside of the github.com/smarterclayton/goexample package prior to compilation.
When you push code to the repo, the cart will compile your package into $OPENSHIFT_REPO_DIR/bin/, with the last segment of the .godir being the name of the executable. For the above .godir, your executable will be:
$OPENSHIFT_REPO_DIR/bin/goexample
If you want to serve web requests (vs. running in the background), you'll need to listen on the ip address and port that OpenShift allocates - those are available as HOST and PORT in the environment.
The repository contains a sample go file which will print "hello, world" when someone hits your web application - see web.go.
Any log output will be generated to $OPENSHIFT_GO_LOG_DIR
When you push code to your repo, a Git postreceive hook runs and invokes the bin/compile script. This attempts to download a Go environment for you into $OPENSHIFT_GO_DIR/cache. Once the environment is setup, the cart runs
go get -tags openshift ./...
on a working copy of your source. The main file that you run will have access to two environment variables, $HOST and $PORT, which contain the internal address you must listen on to receive HTTP requests to your application.
The bin/compile script is based on the Heroku Go buildpack, adapted for OpenShift cartridges.