Build strategies | About Builds | builds for Red Hat OpenShift 1.2

Buildah
Source-to-image
Additional resources

You can use a curated set of build strategies or cluster build strategies on the OpenShift Container Platform cluster. The Builds for Red Hat OpenShift Operator automatically installs these strategies for use. This automated installation of strategies helps you to quickly get started with Builds.

Builds supports the following cluster build strategies:

buildah: Supported on all platforms
source-to-image: Supported on the linux/amd64 platform

The buildpacks build strategy is currently in Developer Preview. For more information, see the buildpacks example.

Buildah

The buildah cluster build strategy uses a Dockerfile to build a container image and pushes it to the target registry. You must specify the Dockerfile in the spec.paramValues field of the Build CR.

You can share the buildah strategy across different namespaces within your cluster because the Builds for Red Hat OpenShift Operator installs the buildah strategy at cluster level.

You can configure the following parameters for the buildah strategy:

Table 1. Configuration parameters for `buildah`
Name	Type	Description	Default
`build-args`	array	Key-value pair of the arguments required by the Dockerfile that is used during the build	[]
`registries-block`	array	List of registries that must be blocked	[]
`registries-insecure`	array	List of insecure registries with their fully qualified domain name (FQDN)	[]
`registries-search`	array	List of registries to search short name images	["registry.redhat.io", "quay.io"]
`dockerfile`	string	Path of the Dockerfile that is used during the build	"Dockerfile"
`storage-driver`	string	Storage drivers that are used by `buildah`, such as overlay or vfs	"vfs"

For more information, see Configuring build strategies in the Additional resources section.

Source-to-image

This build strategy is composed of source-to-image and buildah. You can use this strategy to generate a container file and prepare the application to build with a builder image. You must specify the builder image in the spec.paramValues field of the Build CR.

You can share the source-to-image strategy across different namespaces within your cluster because the Builds for Red Hat OpenShift Operator installs the source-to-image strategy at cluster level.

You can configure the following parameters for the source-to-image strategy:

Table 2. Configuration parameters for `source-to-image`
Name	Type	Description	Default
`registries-block`	array	List of registries that must be blocked	[]
`registries-insecure`	array	List of insecure registries with their FQDN	[]
`registries-search`	array	List of registries to search short name images	["registry.redhat.io", "quay.io"]
`builder-image`	string	Location of the builder image that is used during the build	NA
`storage-driver`	string	Storage drivers that are used by `source-to-image`, such as overlay or vfs	"vfs"