openshift/sti-image-builder
============================
This image is used as a builder image for all STI images. It is used as part of
a [CustomBuild](https://github.com/openshift/origin/blob/master/docs/builds.md#custom-builds).
The following list of environment variables is used in the STI build:
| Name | Description | Default |
| ----------- |:----------------------------:|----------|
| IMAGE_NAME | The output Docker image name | required |
| CONTEXT_DIR | Relative path to Dockerfile | "." |
The sample custom BuildConfig definition might look as following:
```json
{
"kind": "BuildConfig",
"apiVersion": "v1beta1",
"metadata":{
"name": "ruby-20-centos7-build"
},
"triggers": [
{
"type": "github",
"github": {
"secret": "secret101"
}
}
],
"parameters": {
"source" : {
"type" : "Git",
"git" : {
"uri": "git://github.com/openshift/sti-ruby.git"
}
},
"strategy": {
"type": "Custom",
"customStrategy": {
"image": "openshift/sti-image-builder",
"exposeDockerSocket": true,
"env": [
{ "name": "IMAGE_NAME", "value": "openshift/ruby-20-centos7"}
{ "name": "CONTEXT_DIR", "value": "/2.0/"}
]
}
},
"output": {
"to": "ruby-20-centos7-repository",
"tag": "latest",
},
},
"labels": {
"name": "ruby-20-centos7-build"
}
}
```
This example will trigger a build for the 'ruby-20-centos7' everytime there is a
push into its Github repository. It will set the name of the resulting image to
"openshift/ruby-20-centos7" and it expects the Dockerfile to be present in the
root directory of the GIT repository.
After a successful build, the 'openshift/ruby-20-centos7' image will be pushed
into "ruby-20-centos7-repository" ImageRepository and tagged as 'latest'.