configurable engine for container images

internal/plugins/ansible/v1/scaffolds/internal/templates/makefile.go

@@ -68,6 +68,8 @@ const makefileTemplate = `
 # Image URL to use all building/pushing image targets
 IMG ?= {{ .Image }}
 
+IMAGE_BUILDER ?= docker
+
 .PHONY: all
 all: docker-build
 
@@ -97,11 +99,11 @@ run: ansible-operator ## Run against the configured Kubernetes cluster in ~/.kub
 
 .PHONY: docker-build
 docker-build: ## Build docker image with the manager.
-	docker build -t ${IMG} .
+	${IMAGE_BUILDER} build -t ${IMG} .
 
 .PHONY: docker-push
 docker-push: ## Push docker image with the manager.
-	docker push ${IMG}
+	${IMAGE_BUILDER} push ${IMG}
 
 # PLATFORMS defines the target platforms for  the manager image be build to provide support to multiple
 # architectures. (i.e. make docker-buildx IMG=myregistry/mypoperator:0.0.1). To use this option you need to:

internal/plugins/helm/v1/scaffolds/internal/templates/makefile.go

@@ -68,6 +68,8 @@ const makefileTemplate = `
 # Image URL to use all building/pushing image targets
 IMG ?= {{ .Image }}
 
+IMAGE_BUILDER ?= docker
+
 .PHONY: all
 all: docker-build
 
@@ -96,11 +98,11 @@ run: helm-operator ## Run against the configured Kubernetes cluster in ~/.kube/c
 
 .PHONY: docker-build
 docker-build: ## Build docker image with the manager.
-	docker build -t ${IMG} .
+	${IMAGE_BUILDER} build -t ${IMG} .
 
 .PHONY: docker-push
 docker-push: ## Push docker image with the manager.
-	docker push ${IMG}
+	${IMAGE_BUILDER} push ${IMG}
 
 # PLATFORMS defines the target platforms for  the manager image be build to provide support to multiple
 # architectures. (i.e. make docker-buildx IMG=myregistry/mypoperator:0.0.1). To use this option you need to:

internal/plugins/manifests/v2/init.go

@@ -178,6 +178,9 @@ ifeq ($(USE_IMAGE_DIGESTS), true)
 	BUNDLE_GEN_FLAGS += --use-image-digests
 endif
 
+# IMAGE_BUILDER defines the engine to use for handling container images.
+IMAGE_BUILDER ?= docker
+
 # Set the Operator SDK version to use. By default, what is installed on the system is used.
 # This is useful for CI or a project to utilize a specific version of the operator-sdk toolkit.
 OPERATOR_SDK_VERSION ?= %[3]s
@@ -241,7 +244,7 @@ bundle: kustomize operator-sdk ## Generate bundle manifests and metadata, then v
 	makefileBundleBuildPushFragment = `
 .PHONY: bundle-build
 bundle-build: ## Build the bundle image.
-	docker build -f bundle.Dockerfile -t $(BUNDLE_IMG) .
+	${IMAGE_BUILDER} build -f bundle.Dockerfile -t $(BUNDLE_IMG) .
 
 .PHONY: bundle-push
 bundle-push: ## Push the bundle image.
@@ -303,7 +306,7 @@ endif
 # https://github.com/operator-framework/community-operators/blob/7f1438c/docs/packaging-operator.md#updating-your-existing-operator
 .PHONY: catalog-build
 catalog-build: opm ## Build a catalog image.
-	$(OPM) index add --container-tool docker --mode semver --tag $(CATALOG_IMG) --bundles $(BUNDLE_IMGS) $(FROM_INDEX_OPT)
+	$(OPM) index add --container-tool ${IMAGE_BUILDER} --mode semver --tag $(CATALOG_IMG) --bundles $(BUNDLE_IMGS) $(FROM_INDEX_OPT)
 
 # Push the catalog image.
 .PHONY: catalog-push

website/content/en/docs/building-operators/ansible/development-tips.md

@@ -304,6 +304,8 @@ To build the `memcached-operator` image and push it to a registry:
 make docker-build docker-push IMG=example.com/memcached-operator:v0.0.1
 ```
 
+Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.
+
 Deploy the memcached-operator:
 
 ```sh

website/content/en/docs/building-operators/ansible/quickstart.md

@@ -40,6 +40,8 @@ This guide walks through an example of building a simple memcached-operator powe
   make docker-build docker-push IMG="example.com/memcached-operator:v0.0.1"
   ```
 
+  Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.
+
 ### OLM deployment
 
 1. Install [OLM][doc-olm]:

website/content/en/docs/building-operators/golang/migration.md

@@ -392,6 +392,8 @@ Note that:
 - `operator-sdk generate crds` is replaced with `make manifests`, which generates CRDs and RBAC rules.
 - `operator-sdk build` is replaced with `make docker-build IMG=<some-registry>/<project-name>:<tag>`.
 
+`IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.
+
 In this way, run:
 
 ```sh

website/content/en/docs/building-operators/golang/quickstart.md

@@ -43,6 +43,8 @@ plugin which provides support for this platform by adding to the init subCommand
   make docker-build docker-push IMG="example.com/memcached-operator:v0.0.1"
   ```
 
+Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.
+
 ### OLM deployment
 
 1. Install [OLM][doc-olm]:

website/content/en/docs/building-operators/golang/testing.md

@@ -20,7 +20,8 @@ These tests are runnable as native Go tests:
 go test controllers/ -v -ginkgo.v
 ```
 
-The projects generated by using the SDK tool have a Makefile which contains the target tests which executes when you run `make test`. Note that this target will also execute when you run `make docker-build IMG=<some-registry>/<project-name>:<tag>`. 
+The projects generated by using the SDK tool have a Makefile which contains the target tests which executes when you run `make test`. Note that this target will also execute when you run `make docker-build IMG=<some-registry>/<project-name>:<tag>`.
+`IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`. 
 
 Operator SDK adopted this stack to write tests for its operators. It might be useful to check [writing controller tests][writing-controller-tests] documentation and examples to learn how to better write tests for your operator. See, for example, that [controller-runtime](https://github.com/kubernetes-sigs/controller-runtime) is covered by tests using the same stack as well. 
 

website/content/en/docs/building-operators/golang/tutorial.md

@@ -348,7 +348,7 @@ build and push an operator image tagged as `example.com/memcached-operator:v0.0.
 ```console
 make docker-build docker-push
 ```
-
+Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.
 
 ## Run the Operator
 

website/content/en/docs/building-operators/helm/quickstart.md

@@ -39,7 +39,7 @@ This guide walks through an example of building a simple nginx-operator powered
   ```sh
   make docker-build docker-push IMG="example.com/nginx-operator:v0.0.1"
   ```
-
+Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.
 
 ### OLM deployment
 

website/content/en/docs/building-operators/helm/tutorial.md

@@ -188,7 +188,7 @@ build and push an operator image tagged as `example.com/nginx-operator:v0.0.1` t
 ```console
 make docker-build docker-push
 ```
-
+Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.
 
 ## Run the operator
 

website/content/en/docs/overview/cheat-sheet.md

@@ -16,8 +16,8 @@ Below you will find a cheat sheet with options and helpers for projects, which a
 | `operator-sdk init --plugins=<plugin-key>`          | To initialize an operator project in the current directory using a specific plugin. To check the available plugins you can run `operator-sdk --help`. E.g (`operator-sdk init --plugins=helm`).|
 | `operator-sdk create api [flags]`          | Lets you create your own APIs with its [GKV][gkvs] by [Extending the Kubernetes API with CustomResourceDefinitions][extend-k8s-api], or lets you use external/core-types. Also generates their respective [controllers][controllers-k8s-doc].|
 | `operator-sdk create webhook [flags]`          | To scaffold [Webhooks][webhooks-k8s-doc] for the APIs declared in the project. Currently, only the Go-based project supports this option. |
-| `make docker-build IMG=<some-registry>/<project-name>:<tag>`          | Build the operator image.      |
-| `make docker-build docker-push IMG=<some-registry>/<project-name>:<tag>`      | Build and push the operator image for your registry.  |
+| `make docker-build IMG=<some-registry>/<project-name>:<tag>`          | Build the operator image. Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`.     |
+| `make docker-build docker-push IMG=<some-registry>/<project-name>:<tag>`      | Build and push the operator image for your registry. Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`. |
 | `make install`         | Install the CRDs into the cluster. |
 | `make uninstall`         | Uninstall the CRDs into the cluster. |
 | `make run`         | Run your controller locally and outside of the cluster. Note that this will run in the foreground, so switch to a new terminal if you want to leave it running. |

website/content/en/docs/overview/project-layout.md

@@ -15,7 +15,7 @@ The common structure contains the following items:
 
 | File/Directory | Description | 
 | ------ | ----- |
-| `Dockerfile` | The Dockerfile of your operator project, used to build the image with `make docker-build`. |
+| `Dockerfile` | The Dockerfile of your operator project, used to build the image with `make docker-build`. Note: `IMAGE_BUILDER` can be used here to specify your container engine. default is `docker`. |
 | `Makefile` | Build file with helper targets to help you work with your project. |
 | `PROJECT` | This file represents the project's configuration and is used to track useful information for the CLI and plugins. |
 | `bin/` | This directory contains useful binaries such as the `manager` which is used to run your project locally and  the `kustomize` utility used for the project configuration. For other language types, it might have other binaries useful for developing your operator. |