Add integration with Hashicorp Vault, AWS SSM, SecretsManager (#906)

* feat: Add integration with Hashicorp Vault, AWS SSM, SecretsManager

Fields which are rendered: Release.Values, Release.SetValues.Value, Release.SetValues.Values

Example:
```
values:
- foo: ref+vault://mykv/foo?address=http://127.0.0.1:8200#/mykey
set:
- name: xyz
  values:
  - ref+vault://mykv/foo?address=http://127.0.0.1:8200#/mykey3
```

Resolves #881

* feat: Update integration with variantdev/vals

New ref+.\* secret formats are used:
6565695a03 (suported-backends)

Resolves #881

go.mod

@@ -13,15 +13,14 @@ require (
 	github.com/hashicorp/go-getter v1.3.0
 	github.com/huandu/xstrings v1.2.0 // indirect
 	github.com/imdario/mergo v0.3.6
-	github.com/mitchellh/copystructure v1.0.0 // indirect
-	github.com/pkg/errors v0.8.1 // indirect
 	github.com/r3labs/diff v0.0.0-20190801153147-a71de73c46ad
 	github.com/tatsushid/go-prettytable v0.0.0-20141013043238-ed2d14c29939
 	github.com/urfave/cli v0.0.0-20160620154522-6011f165dc28
+	github.com/variantdev/vals v0.0.0-20191025124021-e86de6f8cd7d
 	go.uber.org/atomic v1.3.2 // indirect
 	go.uber.org/multierr v1.1.0
 	go.uber.org/zap v1.8.0
-	gopkg.in/yaml.v2 v2.2.1
+	gopkg.in/yaml.v2 v2.2.2
 	gotest.tools v2.2.0+incompatible
 )
 

go.sum

@@ -1,11 +1,39 @@
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@@ -17,24 +45,37 @@ github.com/Masterminds/sprig v2.22.0+incompatible h1:z4yfnGrZ7netVz+0EDJ0Wi+5VZC
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@@ -45,6 +86,10 @@ github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfb
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@@ -115,6 +218,9 @@ github.com/prometheus/procfs v0.0.0-20180725123919-05ee40e3a273/go.mod h1:c3At6R
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@@ -138,10 +244,15 @@ github.com/shurcooL/reactions v0.0.0-20181006231557-f2e0b4ca5b82/go.mod h1:TCR1l
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@@ -149,8 +260,16 @@ github.com/ulikunitz/xz v0.5.5 h1:pFrO0lVpTBXLpYw+pnLj6TbvHuyjXMfjGeCwSqCVwok=
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@@ -161,9 +280,16 @@ go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1
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+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
 sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=

pkg/app/app.go

@@ -13,6 +13,7 @@ import (
 	"github.com/roboll/helmfile/pkg/helmexec"
 	"github.com/roboll/helmfile/pkg/remote"
 	"github.com/roboll/helmfile/pkg/state"
+	"github.com/variantdev/vals"
 
 	"go.uber.org/zap"
 
@@ -20,6 +21,11 @@ import (
 	"sort"
 )
 
+const (
+	// cache size for improving performance of ref+.* secrets rendering
+	valsCacheSize = 512
+)
+
 type App struct {
 	KubeContext string
 	Logger      *zap.SugaredLogger
@@ -49,6 +55,8 @@ type App struct {
 	remote *remote.Remote
 
 	helmExecer helmexec.Interface
+
+	valsRuntime vals.Evaluator
 }
 
 func New(conf ConfigProvider) *App {
@@ -78,6 +86,13 @@ func Init(app *App) *App {
 	app.fileExistsAt = fileExistsAt
 	app.fileExists = fileExists
 	app.directoryExistsAt = directoryExistsAt
+
+	var err error
+	app.valsRuntime, err = vals.New(valsCacheSize)
+	if err != nil {
+		panic(fmt.Sprintf("Failed to initialize vals runtime: %v", err))
+	}
+
 	return app
 }
 
@@ -274,6 +289,7 @@ func (a *App) loadDesiredStateFromYaml(file string, opts ...LoadOpts) (*state.He
 		KubeContext: a.KubeContext,
 		glob:        a.glob,
 		helm:        a.helmExecer,
+		valsRuntime: a.valsRuntime,
 	}
 
 	var op LoadOpts

pkg/app/app_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/roboll/helmfile/pkg/helmexec"
 	"github.com/roboll/helmfile/pkg/state"
 	"github.com/roboll/helmfile/pkg/testhelper"
+	"github.com/variantdev/vals"
 
 	"go.uber.org/zap"
 	"gotest.tools/env"
@@ -1944,6 +1945,11 @@ releases:
 	var buffer bytes.Buffer
 	logger := helmexec.NewLogger(&buffer, "debug")
 
+	valsRuntime, err := vals.New(32)
+	if err != nil {
+		t.Errorf("unexpected error creating vals runtime: %v", err)
+	}
+
 	app := appWithFs(&App{
 		glob:        filepath.Glob,
 		abs:         filepath.Abs,
@@ -1952,6 +1958,7 @@ releases:
 		Logger:      logger,
 		helmExecer:  helm,
 		Namespace:   "testNamespace",
+		valsRuntime: valsRuntime,
 	}, files)
 	app.Template(configImpl{set: []string{"foo=a", "bar=b"}})
 

pkg/app/desired_state_file_loader.go

@@ -11,6 +11,7 @@ import (
 	"github.com/roboll/helmfile/pkg/environment"
 	"github.com/roboll/helmfile/pkg/helmexec"
 	"github.com/roboll/helmfile/pkg/state"
+	"github.com/variantdev/vals"
 	"go.uber.org/zap"
 )
 
@@ -28,6 +29,7 @@ type desiredStateLoader struct {
 
 	logger      *zap.SugaredLogger
 	helm        helmexec.Interface
+	valsRuntime vals.Evaluator
 }
 
 func (ld *desiredStateLoader) Load(f string, opts LoadOpts) (*state.HelmState, error) {
@@ -128,7 +130,7 @@ func (ld *desiredStateLoader) loadFileWithOverrides(inheritedEnv, overrodeEnv *e
 }
 
 func (a *desiredStateLoader) underlying() *state.StateCreator {
-	c := state.NewCreator(a.logger, a.readFile, a.fileExists, a.abs, a.glob, a.helm)
+	c := state.NewCreator(a.logger, a.readFile, a.fileExists, a.abs, a.glob, a.helm, a.valsRuntime)
 	c.LoadFile = a.loadFile
 	return c
 }

pkg/state/create.go

@@ -11,6 +11,7 @@ import (
 	"github.com/roboll/helmfile/pkg/environment"
 	"github.com/roboll/helmfile/pkg/helmexec"
 	"github.com/roboll/helmfile/pkg/maputil"
+	"github.com/variantdev/vals"
 	"go.uber.org/zap"
 	"gopkg.in/yaml.v2"
 )
@@ -39,13 +40,14 @@ type StateCreator struct {
 	abs         func(string) (string, error)
 	glob        func(string) ([]string, error)
 	helm        helmexec.Interface
+	valsRuntime vals.Evaluator
 
 	Strict bool
 
 	LoadFile func(inheritedEnv *environment.Environment, baseDir, file string, evaluateBases bool) (*HelmState, error)
 }
 
-func NewCreator(logger *zap.SugaredLogger, readFile func(string) ([]byte, error), fileExists func(string) (bool, error), abs func(string) (string, error), glob func(string) ([]string, error), helm helmexec.Interface) *StateCreator {
+func NewCreator(logger *zap.SugaredLogger, readFile func(string) ([]byte, error), fileExists func(string) (bool, error), abs func(string) (string, error), glob func(string) ([]string, error), helm helmexec.Interface, valsRuntime vals.Evaluator) *StateCreator {
 	return &StateCreator{
 		logger:      logger,
 		readFile:    readFile,
@@ -54,6 +56,7 @@ func NewCreator(logger *zap.SugaredLogger, readFile func(string) ([]byte, error)
 		glob:        glob,
 		Strict:      true,
 		helm:        helm,
+		valsRuntime: valsRuntime,
 	}
 }
 
@@ -107,6 +110,7 @@ func (c *StateCreator) Parse(content []byte, baseDir, file string) (*HelmState,
 	state.removeFile = os.Remove
 	state.fileExists = c.fileExists
 	state.glob = c.glob
+	state.valsRuntime = c.valsRuntime
 
 	return &state, nil
 }

pkg/state/create_test.go

@@ -108,7 +108,7 @@ bar: {{ readFile "bar.txt" }}
 	})
 	testFs.Cwd = "/example/path/to"
 
-	state, err := NewCreator(logger, testFs.ReadFile, testFs.FileExists, testFs.Abs, testFs.Glob, nil).ParseAndLoad(yamlContent, filepath.Dir(yamlFile), yamlFile, "production", false, nil)
+	state, err := NewCreator(logger, testFs.ReadFile, testFs.FileExists, testFs.Abs, testFs.Glob, nil, nil).ParseAndLoad(yamlContent, filepath.Dir(yamlFile), yamlFile, "production", false, nil)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}

pkg/state/state.go

@@ -24,6 +24,7 @@ import (
 	"regexp"
 
 	"github.com/tatsushid/go-prettytable"
+	"github.com/variantdev/vals"
 	"go.uber.org/zap"
 	"gopkg.in/yaml.v2"
 )
@@ -63,6 +64,7 @@ type HelmState struct {
 
 	runner      helmexec.Runner
 	helm        helmexec.Interface
+	valsRuntime vals.Evaluator
 }
 
 // SubHelmfileSpec defines the subhelmfile path and options
@@ -1521,7 +1523,7 @@ func (st *HelmState) generateTemporaryValuesFiles(values []interface{}, missingF
 			}
 			st.logger.Debugf("successfully generated the value file at %s. produced:\n%s", path, string(yamlBytes))
 			generatedFiles = append(generatedFiles, valfile.Name())
-		case map[interface{}]interface{}:
+		case map[interface{}]interface{}, map[string]interface{}:
 			valfile, err := ioutil.TempFile("", "values")
 			if err != nil {
 				return nil, err
@@ -1557,7 +1559,17 @@ func (st *HelmState) namespaceAndValuesFlags(helm helmexec.Interface, release *R
 		}
 	}
 
-	generatedFiles, err := st.generateTemporaryValuesFiles(values, release.MissingFileHandler)
+	valuesMapSecretsRendered, err := st.valsRuntime.Eval(map[string]interface{}{"values": values})
+	if err != nil {
+		return nil, err
+	}
+
+	valuesSecretsRendered, ok := valuesMapSecretsRendered["values"].([]interface{})
+	if !ok {
+		return nil, fmt.Errorf("Failed to render values in %s for release %s: type %T isn't supported", st.FilePath, release.Name, valuesMapSecretsRendered["values"])
+	}
+
+	generatedFiles, err := st.generateTemporaryValuesFiles(valuesSecretsRendered, release.MissingFileHandler)
 	if err != nil {
 		return nil, err
 	}
@@ -1594,12 +1606,20 @@ func (st *HelmState) namespaceAndValuesFlags(helm helmexec.Interface, release *R
 	if len(release.SetValues) > 0 {
 		for _, set := range release.SetValues {
 			if set.Value != "" {
-				flags = append(flags, "--set", fmt.Sprintf("%s=%s", escape(set.Name), escape(set.Value)))
+				renderedValue, err := renderValsSecrets(st.valsRuntime, set.Value)
+				if err != nil {
+					return nil, fmt.Errorf("Failed to render set value entry in %s for release %s: %v", st.FilePath, release.Name, err)
+				}
+				flags = append(flags, "--set", fmt.Sprintf("%s=%s", escape(set.Name), escape(renderedValue[0])))
 			} else if set.File != "" {
 				flags = append(flags, "--set-file", fmt.Sprintf("%s=%s", escape(set.Name), st.storage().normalizePath(set.File)))
 			} else if len(set.Values) > 0 {
-				items := make([]string, len(set.Values))
+				renderedValues, err := renderValsSecrets(st.valsRuntime, set.Values...)
-				for i, raw := range set.Values {
+				if err != nil {
+					return nil, fmt.Errorf("Failed to render set values entry in %s for release %s: %v", st.FilePath, release.Name, err)
+				}
+				items := make([]string, len(renderedValues))
+				for i, raw := range renderedValues {
 					items[i] = escape(raw)
 				}
 				v := strings.Join(items, ",")
@@ -1638,6 +1658,27 @@ func (st *HelmState) namespaceAndValuesFlags(helm helmexec.Interface, release *R
 	return flags, nil
 }
 
+// renderValsSecrets helper function which renders 'ref+.*' secrets
+func renderValsSecrets(e vals.Evaluator, input ...string) ([]string, error) {
+	output := make([]string, len(input))
+	if len(input) > 0 {
+		mapRendered, err := e.Eval(map[string]interface{}{"values": input})
+		if err != nil {
+			return nil, err
+		}
+
+		rendered, ok := mapRendered["values"].([]interface{})
+		if !ok {
+			return nil, fmt.Errorf("type %T isn't supported", mapRendered["values"])
+		}
+
+		for i := 0; i < len(rendered); i++ {
+			output[i] = fmt.Sprintf("%v", rendered[i])
+		}
+	}
+	return output, nil
+}
+
 // DisplayAffectedReleases logs the upgraded, deleted and in error releases
 func (ar *AffectedReleases) DisplayAffectedReleases(logger *zap.SugaredLogger) {
 	if ar.Upgraded != nil {

pkg/state/state_test.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/roboll/helmfile/pkg/helmexec"
 	"github.com/roboll/helmfile/pkg/testhelper"
+	"github.com/variantdev/vals"
 
 	"errors"
 	"strings"
@@ -17,6 +18,7 @@ import (
 )
 
 var logger = helmexec.NewLogger(os.Stdout, "warn")
+var valsRuntime, _ = vals.New(32)
 
 func injectFs(st *HelmState, fs *testhelper.TestFs) *HelmState {
 	st.glob = fs.Glob
@@ -523,6 +525,7 @@ func TestHelmState_flagsForUpgrade(t *testing.T) {
 				DeprecatedContext: "default",
 				Releases:          []ReleaseSpec{*tt.release},
 				HelmDefaults:      tt.defaults,
+				valsRuntime:       valsRuntime,
 			}
 			helm := helmexec.New(logger, "default", &helmexec.ShellRunner{
 				Logger: logger,
@@ -965,6 +968,7 @@ func TestHelmState_SyncReleases(t *testing.T) {
 			state := &HelmState{
 				Releases:    tt.releases,
 				logger:      logger,
+				valsRuntime: valsRuntime,
 			}
 			if _ = state.SyncReleases(&AffectedReleases{}, tt.helm, []string{}, 1); !reflect.DeepEqual(tt.helm.releases, tt.wantReleases) {
 				t.Errorf("HelmState.SyncReleases() for [%s] = %v, want %v", tt.name, tt.helm.releases, tt.wantReleases)
@@ -1052,6 +1056,7 @@ func TestHelmState_SyncReleases_MissingValuesFileForUndesiredRelease(t *testing.
 				basePath:    ".",
 				Releases:    []ReleaseSpec{tt.release},
 				logger:      logger,
+				valsRuntime: valsRuntime,
 			}
 			fs := testhelper.NewTestFs(map[string]string{})
 			state = injectFs(state, fs)
@@ -1165,6 +1170,7 @@ func TestHelmState_SyncReleasesAffectedRealeases(t *testing.T) {
 			state := &HelmState{
 				Releases:    tt.releases,
 				logger:      logger,
+				valsRuntime: valsRuntime,
 			}
 			helm := &mockHelmExec{
 				lists: map[listKey]string{},
@@ -1266,6 +1272,7 @@ func TestGetDeployedVersion(t *testing.T) {
 			state := &HelmState{
 				Releases:    []ReleaseSpec{tt.release},
 				logger:      logger,
+				valsRuntime: valsRuntime,
 			}
 			helm := &mockHelmExec{
 				lists: map[listKey]string{},
@@ -1386,6 +1393,7 @@ func TestHelmState_DiffReleases(t *testing.T) {
 			state := &HelmState{
 				Releases:    tt.releases,
 				logger:      logger,
+				valsRuntime: valsRuntime,
 			}
 			_, errs := state.DiffReleases(tt.helm, []string{}, 1, false, false, false)
 			if errs != nil && len(errs) > 0 {
@@ -1457,6 +1465,7 @@ func TestHelmState_SyncReleasesCleanup(t *testing.T) {
 			state := &HelmState{
 				Releases:    tt.releases,
 				logger:      logger,
+				valsRuntime: valsRuntime,
 				removeFile: func(f string) error {
 					numRemovedFiles += 1
 					return nil
@@ -1540,6 +1549,7 @@ func TestHelmState_DiffReleasesCleanup(t *testing.T) {
 			state := &HelmState{
 				Releases:    tt.releases,
 				logger:      logger,
+				valsRuntime: valsRuntime,
 				removeFile: func(f string) error {
 					numRemovedFiles += 1
 					return nil