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generate binary-less dockerfiles (#1338)
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* generate binary-less dockerfiles

Signed-off-by: Jordan Keister <jordan@nimblewidget.com>

* two-flag approach (with cleanup of old dockerfile)

Signed-off-by: Jordan Keister <jordan@nimblewidget.com>

---------

Signed-off-by: Jordan Keister <jordan@nimblewidget.com>
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@grokspawn
grokspawn committed Jun 24, 2024
1 parent ea4e736 commit 4c106e2
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Showing 4 changed files with 182 additions and 42 deletions.
38 changes: 28 additions & 10 deletions alpha/action/generate_dockerfile.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,10 +9,11 @@ import (
)

type GenerateDockerfile struct {
BaseImage string
IndexDir string
ExtraLabels map[string]string
Writer io.Writer
BaseImage string
BuilderImage string
IndexDir string
ExtraLabels map[string]string
Writer io.Writer
}

func (i GenerateDockerfile) Run() error {
Expand All @@ -39,19 +40,36 @@ func (i GenerateDockerfile) validate() error {
return nil
}

const dockerfileTmpl = `# The base image is expected to contain
# /bin/opm (with a serve subcommand) and /bin/grpc_health_probe
const dockerfileTmpl = `# The builder image is expected to contain
# /bin/opm (with serve subcommand)
FROM {{.BuilderImage}} as builder
# Copy FBC root into image at /configs and pre-populate serve cache
ADD {{.IndexDir}} /configs
RUN ["/bin/opm", "serve", "/configs", "--cache-dir=/tmp/cache", "--cache-only"]
FROM {{.BaseImage}}
{{- if ne .BaseImage "scratch" }}
# The base image is expected to contain
# /bin/opm (with serve subcommand) and /bin/grpc_health_probe
# Configure the entrypoint and command
ENTRYPOINT ["/bin/opm"]
CMD ["serve", "/configs", "--cache-dir=/tmp/cache"]
{{- else }}
# OLMv0 CatalogSources that use binary-less images must set:
# spec:
# grpcPodConfig:
# extractContent:
# catalogDir: /configs
# cacheDir: /tmp/cache
{{- end }}
# Copy declarative config root into image at /configs and pre-populate serve cache
ADD {{.IndexDir}} /configs
RUN ["/bin/opm", "serve", "/configs", "--cache-dir=/tmp/cache", "--cache-only"]
COPY --from=builder /configs /configs
COPY --from=builder /tmp/cache /tmp/cache
# Set DC-specific label for the location of the DC root directory
# Set FBC-specific label for the location of the FBC root directory
# in the image
LABEL ` + containertools.ConfigsLocationLabel + `=/configs
{{- if .ExtraLabels }}
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139 changes: 125 additions & 14 deletions alpha/action/generate_dockerfile_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -41,49 +41,160 @@ func TestGenerateDockerfile(t *testing.T) {
{
name: "Success/WithoutExtraLabels",
gen: GenerateDockerfile{
BaseImage: "foo",
IndexDir: "bar",
BuilderImage: "foo",
BaseImage: "foo",
IndexDir: "bar",
},
expectedDockerfile: `# The base image is expected to contain
# /bin/opm (with a serve subcommand) and /bin/grpc_health_probe
expectedDockerfile: `# The builder image is expected to contain
# /bin/opm (with serve subcommand)
FROM foo as builder
# Copy FBC root into image at /configs and pre-populate serve cache
ADD bar /configs
RUN ["/bin/opm", "serve", "/configs", "--cache-dir=/tmp/cache", "--cache-only"]
FROM foo
# The base image is expected to contain
# /bin/opm (with serve subcommand) and /bin/grpc_health_probe
# Configure the entrypoint and command
ENTRYPOINT ["/bin/opm"]
CMD ["serve", "/configs", "--cache-dir=/tmp/cache"]
# Copy declarative config root into image at /configs and pre-populate serve cache
ADD bar /configs
RUN ["/bin/opm", "serve", "/configs", "--cache-dir=/tmp/cache", "--cache-only"]
COPY --from=builder /configs /configs
COPY --from=builder /tmp/cache /tmp/cache
# Set DC-specific label for the location of the DC root directory
# Set FBC-specific label for the location of the FBC root directory
# in the image
LABEL operators.operatorframework.io.index.configs.v1=/configs
`,
},
{
name: "Success/WithExtraLabels",
gen: GenerateDockerfile{
BaseImage: "foo",
IndexDir: "bar",
BuilderImage: "foo",
BaseImage: "foo",
IndexDir: "bar",
ExtraLabels: map[string]string{
"key1": "value1",
"key2": "value2",
},
},
expectedDockerfile: `# The base image is expected to contain
# /bin/opm (with a serve subcommand) and /bin/grpc_health_probe
expectedDockerfile: `# The builder image is expected to contain
# /bin/opm (with serve subcommand)
FROM foo as builder
# Copy FBC root into image at /configs and pre-populate serve cache
ADD bar /configs
RUN ["/bin/opm", "serve", "/configs", "--cache-dir=/tmp/cache", "--cache-only"]
FROM foo
# The base image is expected to contain
# /bin/opm (with serve subcommand) and /bin/grpc_health_probe
# Configure the entrypoint and command
ENTRYPOINT ["/bin/opm"]
CMD ["serve", "/configs", "--cache-dir=/tmp/cache"]
# Copy declarative config root into image at /configs and pre-populate serve cache
COPY --from=builder /configs /configs
COPY --from=builder /tmp/cache /tmp/cache
# Set FBC-specific label for the location of the FBC root directory
# in the image
LABEL operators.operatorframework.io.index.configs.v1=/configs
# Set other custom labels
LABEL "key1"="value1"
LABEL "key2"="value2"
`,
},

{
name: "Scratch/Fail/EmptyBaseImage",
gen: GenerateDockerfile{
BuilderImage: "foo",
IndexDir: "bar",
ExtraLabels: map[string]string{
"key1": "value1",
"key2": "value2",
},
},
expectedErr: "base image is unset",
},
{
name: "Scratch/Fail/EmptyFromDir",
gen: GenerateDockerfile{
BuilderImage: "foo",
BaseImage: "scratch",
ExtraLabels: map[string]string{
"key1": "value1",
"key2": "value2",
},
},
expectedErr: "index directory is unset",
},
{
name: "Scratch/Success/WithoutExtraLabels",
gen: GenerateDockerfile{
BuilderImage: "foo",
BaseImage: "scratch",
IndexDir: "bar",
},
expectedDockerfile: `# The builder image is expected to contain
# /bin/opm (with serve subcommand)
FROM foo as builder
# Copy FBC root into image at /configs and pre-populate serve cache
ADD bar /configs
RUN ["/bin/opm", "serve", "/configs", "--cache-dir=/tmp/cache", "--cache-only"]
# Set DC-specific label for the location of the DC root directory
FROM scratch
# OLMv0 CatalogSources that use binary-less images must set:
# spec:
# grpcPodConfig:
# extractContent:
# catalogDir: /configs
# cacheDir: /tmp/cache
COPY --from=builder /configs /configs
COPY --from=builder /tmp/cache /tmp/cache
# Set FBC-specific label for the location of the FBC root directory
# in the image
LABEL operators.operatorframework.io.index.configs.v1=/configs
`,
},
{
name: "Scratch/Success/WithExtraLabels",
gen: GenerateDockerfile{
BuilderImage: "foo",
BaseImage: "scratch",
IndexDir: "bar",
ExtraLabels: map[string]string{
"key1": "value1",
"key2": "value2",
},
},
expectedDockerfile: `# The builder image is expected to contain
# /bin/opm (with serve subcommand)
FROM foo as builder
# Copy FBC root into image at /configs and pre-populate serve cache
ADD bar /configs
RUN ["/bin/opm", "serve", "/configs", "--cache-dir=/tmp/cache", "--cache-only"]
FROM scratch
# OLMv0 CatalogSources that use binary-less images must set:
# spec:
# grpcPodConfig:
# extractContent:
# catalogDir: /configs
# cacheDir: /tmp/cache
COPY --from=builder /configs /configs
COPY --from=builder /tmp/cache /tmp/cache
# Set FBC-specific label for the location of the FBC root directory
# in the image
LABEL operators.operatorframework.io.index.configs.v1=/configs
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41 changes: 29 additions & 12 deletions cmd/opm/generate/cmd.go
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ import (
func NewCmd() *cobra.Command {
cmd := &cobra.Command{
Use: "generate",
Short: "Generate various artifacts for declarative config indexes",
Short: "Generate various artifacts for file-based catalogs",
}
cmd.AddCommand(
newDockerfileCmd(),
Expand All @@ -28,24 +28,36 @@ func NewCmd() *cobra.Command {
func newDockerfileCmd() *cobra.Command {
var (
baseImage string
builderImage string
extraLabelStrs []string
)
cmd := &cobra.Command{
Use: "dockerfile <dcRootDir>",
Use: "dockerfile <fbcRootDir>",
Args: cobra.ExactArgs(1),
Short: "Generate a Dockerfile for a declarative config index",
Long: `Generate a Dockerfile for a declarative config index.
Short: "Generate a Dockerfile for a file-based catalog",
Long: `Generate a Dockerfile for a file-based catalog.
This command creates a Dockerfile in the same directory as the <dcRootDir>
(named <dcDirName>.Dockerfile) that can be used to build the index. If a
This command creates a Dockerfile in the same directory as the <fbcRootDir>
(named <fbcRootDir>.Dockerfile) that can be used to build the index. If a
Dockerfile with the same name already exists, this command will fail.
When specifying extra labels, note that if duplicate keys exist, only the last
value of each duplicate key will be added to the generated Dockerfile.
A separate builder and base image can be specified. The builder image may not be "scratch".
`,
RunE: func(_ *cobra.Command, args []string) error {
RunE: func(inCmd *cobra.Command, args []string) error {
fromDir := filepath.Clean(args[0])

if builderImage == "scratch" {
return fmt.Errorf("invalid builder image: %q", builderImage)
}

// preserving old behavior, if binary-image is set but not builder-image, set builder-image to binary-image
if inCmd.Flags().Changed("binary-image") && !inCmd.Flags().Changed("builder-image") {
builderImage = baseImage
}

extraLabels, err := parseLabels(extraLabelStrs)
if err != nil {
return err
Expand All @@ -71,19 +83,24 @@ value of each duplicate key will be added to the generated Dockerfile.
defer f.Close()

gen := action.GenerateDockerfile{
BaseImage: baseImage,
IndexDir: indexName,
ExtraLabels: extraLabels,
Writer: f,
BaseImage: baseImage,
BuilderImage: builderImage,
IndexDir: indexName,
ExtraLabels: extraLabels,
Writer: f,
}
if err := gen.Run(); err != nil {
log.Fatal(err)
}
return nil
},
}
cmd.Flags().StringVarP(&baseImage, "binary-image", "i", containertools.DefaultBinarySourceImage, "Image in which to build catalog.")
cmd.Flags().StringVar(&baseImage, "binary-image", containertools.DefaultBinarySourceImage, "Image in which to build catalog.")
cmd.Flags().StringVarP(&baseImage, "base-image", "i", containertools.DefaultBinarySourceImage, "Image base to use to build catalog.")
cmd.Flags().StringVarP(&builderImage, "builder-image", "b", containertools.DefaultBinarySourceImage, "Image to use as a build stage.")
cmd.Flags().StringSliceVarP(&extraLabelStrs, "extra-labels", "l", []string{}, "Extra labels to include in the generated Dockerfile. Labels should be of the form 'key=value'.")
cmd.Flags().MarkDeprecated("binary-image", "use --base-image instead")
cmd.MarkFlagsMutuallyExclusive("binary-image", "base-image")
return cmd
}

Expand Down
6 changes: 0 additions & 6 deletions ohio.Dockerfile
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