diff options
author | Dan Duvall <dduvall@wikimedia.org> | 2017-09-05 17:33:27 -0700 |
---|---|---|
committer | Dan Duvall <dduvall@wikimedia.org> | 2017-09-07 10:06:47 -0700 |
commit | 62066296380d19dc77ab216cb27100e7e72ff69f (patch) | |
tree | 658fcce89b8e18bad2144d99bc8cfef5869b10e8 | |
parent | 410085e1f5be759b6a2bfbe08a51dca84aa18e3c (diff) | |
download | blubber-62066296380d19dc77ab216cb27100e7e72ff69f.tar.gz |
Smarter copies/sharedvolume/default behavior
Summary:
Defined new abstract `build.Volume` and corresponding
`docker.DockerVolume` instructions.
Refactored compilation of main `COPY` or `VOLUME` instruction for
application files to use the new instructions and moved injection of
these instructions out of the compiler and into `VariantConfig`. The
latter can be smarter about the following cases:
1. When `copies` is set, simply depend on artifacts for the application
files and do not copy anything from the build host.
2. When `sharedvolume` is `true`, inject a `build.Volume` instruction
for the application working directory.
3. When neither of the above are set, copy application files from the
host.
Fixes T174623
Depends on D768
Test Plan:
Run `go test ./...`. Run `blubber blubber.example.yaml production` and ensure:
1. The `prep` stage has a `COPY . .` instruction.
2. The final stage has no `COPY . .` instruction, only `COPY --from=prep`
instructions.
Reviewers: thcipriani, mobrovac, hashar, mmodell, #release-engineering-team
Reviewed By: thcipriani, mobrovac, #release-engineering-team
Tags: #release-engineering-team
Maniphest Tasks: T174623
Differential Revision: https://phabricator.wikimedia.org/D769
-rw-r--r-- | README.md | 7 | ||||
-rw-r--r-- | blubber.example.yaml | 7 | ||||
-rw-r--r-- | build/instructions.go | 8 | ||||
-rw-r--r-- | build/instructions_test.go | 6 | ||||
-rw-r--r-- | build/phases.go | 1 | ||||
-rw-r--r-- | config/variant.go | 19 | ||||
-rw-r--r-- | config/variant_test.go | 80 | ||||
-rw-r--r-- | docker/compiler.go | 6 | ||||
-rw-r--r-- | docker/instructions.go | 12 | ||||
-rw-r--r-- | docker/instructions_test.go | 12 |
10 files changed, 133 insertions, 25 deletions
@@ -40,11 +40,16 @@ variants: packages: [chromium] entrypoint: [npm, test] + prep: + includes: [build] + node: + env: production + production: base: debian:jessie-slim node: env: production - copies: test + copies: prep entrypoint: [node, server.js] ``` diff --git a/blubber.example.yaml b/blubber.example.yaml index 87a4cf1..894472f 100644 --- a/blubber.example.yaml +++ b/blubber.example.yaml @@ -28,9 +28,14 @@ variants: packages: [chromium] entrypoint: [npm, test] + prep: + includes: [build] + node: + env: production + production: base: debian:jessie-slim node: env: production - copies: test + copies: prep entrypoint: [node, server.js] diff --git a/build/instructions.go b/build/instructions.go index 1b954a2..38ea322 100644 --- a/build/instructions.go +++ b/build/instructions.go @@ -80,6 +80,14 @@ func (env Env) Compile() []string { return defs } +type Volume struct { + Path string +} + +func (vol Volume) Compile() []string { + return []string{quote(vol.Path)} +} + func quote(arg string) string { return strconv.Quote(arg) } diff --git a/build/instructions_test.go b/build/instructions_test.go index 8f9470c..04ebdfb 100644 --- a/build/instructions_test.go +++ b/build/instructions_test.go @@ -55,3 +55,9 @@ func TestEnv(t *testing.T) { `quxname="quxvalue"`, }, i.Compile()) } + +func TestVolume(t *testing.T) { + i := build.Volume{"/foo/dir"} + + assert.Equal(t, []string{`"/foo/dir"`}, i.Compile()) +} diff --git a/build/phases.go b/build/phases.go index 095263c..02e84e4 100644 --- a/build/phases.go +++ b/build/phases.go @@ -6,6 +6,7 @@ const ( PhasePrivileged Phase = iota PhasePrivilegeDropped PhasePreInstall + PhaseInstall PhasePostInstall ) diff --git a/config/variant.go b/config/variant.go index cc2cbdb..dea45af 100644 --- a/config/variant.go +++ b/config/variant.go @@ -25,7 +25,20 @@ func (vc *VariantConfig) InstructionsForPhase(phase build.Phase) []build.Instruc ainstructions = append(ainstructions, artifact.InstructionsForPhase(phase)...) } - return append(ainstructions, instructions...) + instructions = append(ainstructions, instructions...) + + switch phase { + case build.PhaseInstall: + if vc.Copies == "" { + if vc.SharedVolume.True { + instructions = append(instructions, build.Volume{vc.Runs.In}) + } else { + instructions = append(instructions, build.Copy{[]string{"."}, "."}) + } + } + } + + return instructions } func (vc *VariantConfig) VariantDependencies() []string { @@ -52,8 +65,8 @@ func (vc *VariantConfig) defaultArtifacts() []ArtifactsConfig { return []ArtifactsConfig{ { From: vc.Copies, - Source: vc.CommonConfig.Runs.In, - Destination: vc.CommonConfig.Runs.In, + Source: vc.Runs.In, + Destination: vc.Runs.In, }, { From: vc.Copies, diff --git a/config/variant_test.go b/config/variant_test.go index 0a98828..666b4d7 100644 --- a/config/variant_test.go +++ b/config/variant_test.go @@ -45,22 +45,72 @@ func TestVariantDependencies(t *testing.T) { } func TestVariantConfigInstructions(t *testing.T) { - cfg := config.VariantConfig{ - CommonConfig: config.CommonConfig{Runs: config.RunsConfig{In: "/srv/service"}}, - Copies: "foo", - Artifacts: []config.ArtifactsConfig{ - {From: "build", Source: "/foo/src", Destination: "/foo/dst"}, - }, - } + t.Run("PhaseInstall", func(t *testing.T) { + t.Run("copies", func(t *testing.T) { + cfg := config.VariantConfig{Copies: "foo"} + + assert.Empty(t, cfg.InstructionsForPhase(build.PhaseInstall)) + }) + + t.Run("shared volume", func(t *testing.T) { + cfg := config.VariantConfig{} + cfg.Runs.In = "/srv/service" + cfg.SharedVolume.True = true + + assert.Equal(t, + []build.Instruction{ + build.Volume{"/srv/service"}, + }, + cfg.InstructionsForPhase(build.PhaseInstall), + ) + }) + + t.Run("standard source copy", func(t *testing.T) { + cfg := config.VariantConfig{} + + assert.Equal(t, + []build.Instruction{ + build.Copy{[]string{"."}, "."}, + }, + cfg.InstructionsForPhase(build.PhaseInstall), + ) + }) + }) t.Run("PhasePostInstall", func(t *testing.T) { - assert.Equal(t, - []build.Instruction{ - build.CopyFrom{"foo", build.Copy{[]string{"/srv/service"}, "/srv/service"}}, - build.CopyFrom{"foo", build.Copy{[]string{config.LocalLibPrefix}, config.LocalLibPrefix}}, - build.CopyFrom{"build", build.Copy{[]string{"/foo/src"}, "/foo/dst"}}, - }, - cfg.InstructionsForPhase(build.PhasePostInstall), - ) + t.Run("for copies and artifacts", func(t *testing.T) { + cfg := config.VariantConfig{ + Copies: "foo", + Artifacts: []config.ArtifactsConfig{ + {From: "build", Source: "/foo/src", Destination: "/foo/dst"}, + }, + CommonConfig: config.CommonConfig{Runs: config.RunsConfig{In: "/srv/service"}}, + } + + assert.Equal(t, + []build.Instruction{ + build.CopyFrom{"foo", build.Copy{[]string{"/srv/service"}, "/srv/service"}}, + build.CopyFrom{"foo", build.Copy{[]string{config.LocalLibPrefix}, config.LocalLibPrefix}}, + build.CopyFrom{"build", build.Copy{[]string{"/foo/src"}, "/foo/dst"}}, + }, + cfg.InstructionsForPhase(build.PhasePostInstall), + ) + }) + + t.Run("for just artifacts", func(t *testing.T) { + cfg := config.VariantConfig{ + Artifacts: []config.ArtifactsConfig{ + {From: "build", Source: "/foo/src", Destination: "/foo/dst"}, + }, + CommonConfig: config.CommonConfig{Runs: config.RunsConfig{In: "/srv/service"}}, + } + + assert.Equal(t, + []build.Instruction{ + build.CopyFrom{"build", build.Copy{[]string{"/foo/src"}, "/foo/dst"}}, + }, + cfg.InstructionsForPhase(build.PhasePostInstall), + ) + }) }) } diff --git a/docker/compiler.go b/docker/compiler.go index 2891140..c9ca0fb 100644 --- a/docker/compiler.go +++ b/docker/compiler.go @@ -58,11 +58,7 @@ func CompileStage(buffer *bytes.Buffer, stage string, vcfg *config.VariantConfig CompilePhase(buffer, vcfg, build.PhasePreInstall) - if vcfg.SharedVolume.True { - Writeln(buffer, "VOLUME [\"", vcfg.Runs.In, "\"]") - } else { - Writeln(buffer, "COPY . .") - } + CompilePhase(buffer, vcfg, build.PhaseInstall) CompilePhase(buffer, vcfg, build.PhasePostInstall) diff --git a/docker/instructions.go b/docker/instructions.go index 2b00c1b..4edcb23 100644 --- a/docker/instructions.go +++ b/docker/instructions.go @@ -26,6 +26,10 @@ func NewDockerInstruction(instruction build.Instruction) (DockerInstruction, err var dockerInstruction DockerEnv dockerInstruction.arguments = instruction.Compile() return dockerInstruction, nil + case build.Volume: + var dockerInstruction DockerVolume + dockerInstruction.arguments = instruction.Compile() + return dockerInstruction, nil } return nil, errors.New("Unable to create DockerInstruction") @@ -77,6 +81,14 @@ func (de DockerEnv) Compile() string { join(de.arguments, " ")) } +type DockerVolume struct{ abstractDockerInstruction } + +func (dv DockerVolume) Compile() string { + return fmt.Sprintf( + "VOLUME [%s]\n", + join(dv.arguments, ", ")) +} + func join(arguments []string, delimiter string) string { return removeNewlines(strings.Join(arguments, delimiter)) } diff --git a/docker/instructions_test.go b/docker/instructions_test.go index fb9116b..10cc1ab 100644 --- a/docker/instructions_test.go +++ b/docker/instructions_test.go @@ -70,6 +70,18 @@ func TestEnv(t *testing.T) { assert.Equal(t, "ENV bar=\"foo\" foo=\"bar\"\n", di.Compile()) } +func TestVolume(t *testing.T) { + i := build.Volume{"/foo/dir"} + + di, err := docker.NewDockerInstruction(i) + + var dockerVolume docker.DockerVolume + + assert.Nil(t, err) + assert.IsType(t, dockerVolume, di) + assert.Equal(t, "VOLUME [\"/foo/dir\"]\n", di.Compile()) +} + func TestEscapeRun(t *testing.T) { i := build.Run{"/bin/true\nRUN echo HACKED!", []string{}} dr, _ := docker.NewDockerInstruction(i) |