update default scaffolded opm base image (operator-framework#762)

- Change default base image scaffolded during `opm index` and `opm alpha
  generate dockerfile` to `quay.io/operator-framework/opm:latest`
- update opm-example.Dockerfile to reflect this change (and to focus on
  file-based configs rather than sqlite databases)

Signed-off-by: Joe Lanford <[email protected]>

Author: joelanford

opm-example.Dockerfile

@@ -1,11 +1,14 @@
-FROM quay.io/operator-framework/upstream-opm-builder AS builder
+# The base image is expected to contain
+# /bin/opm (with a serve subcommand) and /bin/grpc_health_probe
+FROM quay.io/operator-framework/opm:latest
 
-FROM scratch
-LABEL operators.operatorframework.io.index.database.v1=./index.db
-COPY ["nsswitch.conf", "/etc/nsswitch.conf"]
-COPY database ./
-COPY --from=builder /bin/opm /opm
-COPY --from=builder /bin/grpc_health_probe /bin/grpc_health_probe
-EXPOSE 50051
-ENTRYPOINT ["/opm"]
-CMD ["registry", "serve", "--database", "index.db"]
+# Configure the entrypoint and command
+ENTRYPOINT ["/bin/opm"]
+CMD ["serve", "/configs"]
+
+# Copy declarative config root into image at /configs
+ADD index /configs
+
+# Set DC-specific label for the location of the DC root directory
+# in the image
+LABEL operators.operatorframework.io.index.configs.v1=/configs

pkg/containertools/dockerfilegenerator.go

@@ -8,7 +8,7 @@ import (
 )
 
 const (
-	DefaultBinarySourceImage = "quay.io/operator-framework/upstream-opm-builder"
+	DefaultBinarySourceImage = "quay.io/operator-framework/opm:latest"
 	DefaultDbLocation        = "/database/index.db"
 	DbLocationLabel          = "operators.operatorframework.io.index.database.v1"
 	ConfigsLocationLabel     = "operators.operatorframework.io.index.configs.v1"

pkg/containertools/dockerfilegenerator_test.go

@@ -3,11 +3,11 @@ package containertools_test
 import (
 	"testing"
 
-	"github.com/operator-framework/operator-registry/pkg/containertools"
-
 	"github.com/golang/mock/gomock"
 	"github.com/sirupsen/logrus"
 	"github.com/stretchr/testify/require"
+
+	"github.com/operator-framework/operator-registry/pkg/containertools"
 )
 
 func TestGenerateDockerfile(t *testing.T) {
@@ -39,7 +39,7 @@ func TestGenerateDockerfile_EmptyBaseImage(t *testing.T) {
 	defer controller.Finish()
 
 	databasePath := "database/index.db"
-	expectedDockerfile := `FROM quay.io/operator-framework/upstream-opm-builder
+	expectedDockerfile := `FROM quay.io/operator-framework/opm:latest
 LABEL operators.operatorframework.io.index.database.v1=/database/index.db
 ADD database/index.db /database/index.db
 EXPOSE 50051