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feat: removed reliance on terraform state for config hashes (#384)
Removed storing the component config hash in terraform state, and instead store it in a `.mach/hashes.json` file. Because reading state requires a terraform init for every component before actually checking for changes the actual apply process is very slow. By storing the hashes into a file on disk we can speed up the process enormously as we can now skip many of the inits up front.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| kind: Added | ||
| body: Moved hash storage out of terraform | ||
| time: 2024-03-18T11:46:35.79447595+01:00 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| package batcher | ||
|
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| import "github.com/mach-composer/mach-composer-cli/internal/graph" | ||
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| type BatchFunc func(g *graph.Graph) map[int][]graph.Node |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| package batcher | ||
|
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| import "github.com/mach-composer/mach-composer-cli/internal/graph" | ||
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| func NaiveBatchFunc() BatchFunc { | ||
| return func(g *graph.Graph) map[int][]graph.Node { | ||
| batches := map[int][]graph.Node{} | ||
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| var sets = map[string][]graph.Path{} | ||
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| for _, n := range g.Vertices() { | ||
| var route, _ = g.Routes(n.Path(), g.StartNode.Path()) | ||
| sets[n.Path()] = route | ||
| } | ||
|
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| for k, routes := range sets { | ||
| var mx int | ||
| for _, route := range routes { | ||
| if len(route) > mx { | ||
| mx = len(route) | ||
| } | ||
| } | ||
| n, _ := g.Vertex(k) | ||
| batches[mx] = append(batches[mx], n) | ||
| } | ||
|
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| return batches | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| package batcher | ||
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| import ( | ||
| "github.com/dominikbraun/graph" | ||
| internalgraph "github.com/mach-composer/mach-composer-cli/internal/graph" | ||
| "github.com/stretchr/testify/assert" | ||
| "testing" | ||
| ) | ||
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| func TestBatchNodesDepth1(t *testing.T) { | ||
| ig := graph.New(func(n internalgraph.Node) string { return n.Path() }, graph.Directed(), graph.Tree(), graph.PreventCycles()) | ||
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| start := new(internalgraph.NodeMock) | ||
| start.On("Path").Return("main/site-1") | ||
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| _ = ig.AddVertex(start) | ||
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| g := &internalgraph.Graph{Graph: ig, StartNode: start} | ||
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| batches := NaiveBatchFunc()(g) | ||
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| assert.Equal(t, 1, len(batches)) | ||
| } | ||
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| func TestBatchNodesDepth2(t *testing.T) { | ||
| ig := graph.New(func(n internalgraph.Node) string { return n.Path() }, graph.Directed(), graph.Tree(), graph.PreventCycles()) | ||
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| site := new(internalgraph.NodeMock) | ||
| site.On("Path").Return("main/site-1") | ||
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| component1 := new(internalgraph.NodeMock) | ||
| component1.On("Path").Return("main/site-1/component-1") | ||
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| component2 := new(internalgraph.NodeMock) | ||
| component2.On("Path").Return("main/site-1/component-2") | ||
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| _ = ig.AddVertex(site) | ||
| _ = ig.AddVertex(component1) | ||
| _ = ig.AddVertex(component2) | ||
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| _ = ig.AddEdge("main/site-1", "main/site-1/component-1") | ||
| _ = ig.AddEdge("main/site-1", "main/site-1/component-2") | ||
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| g := &internalgraph.Graph{Graph: ig, StartNode: site} | ||
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| batches := NaiveBatchFunc()(g) | ||
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| assert.Equal(t, 2, len(batches)) | ||
| assert.Equal(t, 1, len(batches[0])) | ||
| assert.Equal(t, "main/site-1", batches[0][0].Path()) | ||
| assert.Equal(t, 2, len(batches[1])) | ||
| assert.Contains(t, batches[1][0].Path(), "component") | ||
| assert.Contains(t, batches[1][1].Path(), "component") | ||
| } | ||
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| func TestBatchNodesDepth3(t *testing.T) { | ||
| ig := graph.New(func(n internalgraph.Node) string { return n.Path() }, graph.Directed(), graph.Tree(), graph.PreventCycles()) | ||
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| site := new(internalgraph.NodeMock) | ||
| site.On("Path").Return("main/site-1") | ||
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| component1 := new(internalgraph.NodeMock) | ||
| component1.On("Path").Return("main/site-1/component-1") | ||
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| component2 := new(internalgraph.NodeMock) | ||
| component2.On("Path").Return("main/site-1/component-2") | ||
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| _ = ig.AddVertex(site) | ||
| _ = ig.AddVertex(component1) | ||
| _ = ig.AddVertex(component2) | ||
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| _ = ig.AddEdge("main/site-1", "main/site-1/component-1") | ||
| _ = ig.AddEdge("main/site-1/component-1", "main/site-1/component-2") | ||
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| g := &internalgraph.Graph{Graph: ig, StartNode: site} | ||
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| batches := NaiveBatchFunc()(g) | ||
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| assert.Equal(t, 3, len(batches)) | ||
| assert.Equal(t, 1, len(batches[0])) | ||
| assert.Equal(t, "main/site-1", batches[0][0].Path()) | ||
| assert.Equal(t, 1, len(batches[1])) | ||
| assert.Contains(t, batches[1][0].Path(), "main/site-1/component-1") | ||
| assert.Equal(t, 1, len(batches[2])) | ||
| assert.Contains(t, batches[2][0].Path(), "main/site-1/component-2") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| //go:build integration | ||
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| package cmd | ||
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| import ( | ||
| "github.com/stretchr/testify/assert" | ||
| "os" | ||
| "os/exec" | ||
| "path" | ||
| "testing" | ||
| ) | ||
|
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| import ( | ||
| "github.com/stretchr/testify/suite" | ||
| ) | ||
|
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| type ApplyTestSuite struct { | ||
| suite.Suite | ||
| tempDir string | ||
| } | ||
|
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| func TestExampleTestSuite(t *testing.T) { | ||
| suite.Run(t, new(ApplyTestSuite)) | ||
| } | ||
|
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| func (s *ApplyTestSuite) SetupSuite() { | ||
| _, err := exec.LookPath("terraform") | ||
| if err != nil { | ||
| s.T().Fatal("terraform command not found") | ||
| } | ||
|
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| tmpDir, _ := os.MkdirTemp("mach-composer", "test") | ||
| _ = os.Setenv("TF_PLUGIN_CACHE_DIR", tmpDir) | ||
| _ = os.Setenv("TF_PLUGIN_CACHE_MAY_BREAK_DEPENDENCY_LOCK_FILE", "1") | ||
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| s.tempDir = tmpDir | ||
| } | ||
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| func (s *ApplyTestSuite) TearDownSuite() { | ||
| _ = os.RemoveAll(s.tempDir) | ||
| } | ||
|
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| func cleanWorkingDir(workdir string) { | ||
| err := os.RemoveAll(path.Join(workdir, "deployments")) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| err = os.RemoveAll(path.Join(workdir, "states")) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| err = os.RemoveAll(path.Join(workdir, "hashes.json")) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| } | ||
|
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| func (s *ApplyTestSuite) TestApplySimple() { | ||
| pwd, _ := os.Getwd() | ||
| workdir := path.Join(pwd, "testdata/cases/apply/simple") | ||
| defer cleanWorkingDir(workdir) | ||
|
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| cmd := RootCmd | ||
| _ = os.Setenv("MC_HASH_FILE", path.Join(workdir, "hashes.json")) | ||
| cmd.SetArgs([]string{ | ||
| "apply", | ||
| "--output-path", path.Join(workdir, "deployments"), | ||
| "--file", path.Join(workdir, "main.yaml"), | ||
| "--auto-approve", | ||
| }) | ||
| err := cmd.Execute() | ||
| assert.NoError(s.T(), err) | ||
|
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| assert.FileExists(s.T(), path.Join(workdir, "hashes.json")) | ||
| assert.FileExists(s.T(), path.Join(workdir, "deployments/main/test-1/main.tf")) | ||
| assert.FileExists(s.T(), path.Join(workdir, "deployments/main/test-1/states/test-1.tfstate")) | ||
| assert.FileExists(s.T(), path.Join(workdir, "deployments/main/test-1/outputs/component-1.json")) | ||
| } | ||
|
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| func (s *ApplyTestSuite) TestApplySplitState() { | ||
| pwd, _ := os.Getwd() | ||
| workdir := path.Join(pwd, "testdata/cases/apply/split-state") | ||
| defer cleanWorkingDir(workdir) | ||
|
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| cmd := RootCmd | ||
| _ = os.Setenv("MC_HASH_FILE", path.Join(workdir, "hashes.json")) | ||
| _ = os.Setenv("STATES_PATH", path.Join(workdir, "states")) | ||
| cmd.SetArgs([]string{ | ||
| "apply", | ||
| "--output-path", path.Join(workdir, "deployments"), | ||
| "--file", path.Join(workdir, "main.yaml"), | ||
| "--auto-approve", | ||
| }) | ||
| err := cmd.Execute() | ||
| assert.NoError(s.T(), err) | ||
|
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| assert.FileExists(s.T(), path.Join(workdir, "hashes.json")) | ||
| assert.FileExists(s.T(), path.Join(workdir, "deployments/main/test-1/main.tf")) | ||
| assert.FileExists(s.T(), path.Join(workdir, "deployments/main/test-1/component-2/main.tf")) | ||
| assert.FileExists(s.T(), path.Join(workdir, "states/test-1.tfstate")) | ||
| assert.FileExists(s.T(), path.Join(workdir, "states/component-2.tfstate")) | ||
| } | ||
|
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| func (s *ApplyTestSuite) TestApplyNoHashesFile() { | ||
| pwd, _ := os.Getwd() | ||
| workdir := path.Join(pwd, "testdata/cases/apply/simple") | ||
| defer cleanWorkingDir(workdir) | ||
|
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| cmd := RootCmd | ||
| _ = os.Setenv("MC_HASH_FILE", path.Join(workdir, "hashes.json")) | ||
| cmd.SetArgs([]string{ | ||
| "apply", | ||
| "--output-path", path.Join(workdir, "deployments"), | ||
| "--file", path.Join(workdir, "main.yaml"), | ||
| "--auto-approve", | ||
| }) | ||
| err := cmd.Execute() | ||
| assert.NoError(s.T(), err) | ||
|
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| assert.FileExists(s.T(), path.Join(workdir, "hashes.json")) | ||
|
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| err = os.RemoveAll(path.Join(workdir, "hashes.json")) | ||
| if err != nil { | ||
| s.T().Fatal(err) | ||
| } | ||
|
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| err = cmd.Execute() | ||
| assert.NoError(s.T(), err) | ||
| assert.FileExists(s.T(), path.Join(workdir, "hashes.json")) | ||
| } |
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