Live: pipeline rule crud (file-based, still for MVP) (#39238)

pkg/api/api.go

@@ -438,6 +438,9 @@ func (hs *HTTPServer) registerRoutes() {
 				// POST Live data to be processed according to channel rules.
 				liveRoute.Post("/push/:streamId/:path", hs.LivePushGateway.HandlePath)
 				liveRoute.Get("/channel-rules", routing.Wrap(hs.Live.HandleChannelRulesListHTTP), reqOrgAdmin)
+				liveRoute.Post("/channel-rules", routing.Wrap(hs.Live.HandleChannelRulesPostHTTP), reqOrgAdmin)
+				liveRoute.Put("/channel-rules", routing.Wrap(hs.Live.HandleChannelRulesPutHTTP), reqOrgAdmin)
+				liveRoute.Delete("/channel-rules", routing.Wrap(hs.Live.HandleChannelRulesDeleteHTTP), reqOrgAdmin)
 				liveRoute.Get("/pipeline-entities", routing.Wrap(hs.Live.HandlePipelineEntitiesListHTTP), reqOrgAdmin)
 				liveRoute.Get("/remote-write-backends", routing.Wrap(hs.Live.HandleRemoteWriteBackendsListHTTP), reqOrgAdmin)
 			}

pkg/services/live/live.go

@@ -2,8 +2,10 @@ package live
 
 import (
 	"context"
+	"encoding/json"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -883,95 +885,77 @@ func (g *GrafanaLive) HandleChannelRulesListHTTP(c *models.ReqContext) response.
 	})
 }
 
-type configInfo struct {
-	Type        string      `json:"type"`
-	Description string      `json:"description"`
-	Example     interface{} `json:"example,omitempty"`
+// HandleChannelRulesPostHTTP ...
+func (g *GrafanaLive) HandleChannelRulesPostHTTP(c *models.ReqContext) response.Response {
+	body, err := ioutil.ReadAll(c.Req.Body)
+	if err != nil {
+		return response.Error(http.StatusInternalServerError, "Error reading body", err)
+	}
+	var rule pipeline.ChannelRule
+	err = json.Unmarshal(body, &rule)
+	if err != nil {
+		return response.Error(http.StatusBadRequest, "Error decoding channel rule", err)
+	}
+	result, err := g.channelRuleStorage.CreateChannelRule(c.Req.Context(), c.OrgId, rule)
+	if err != nil {
+		return response.Error(http.StatusInternalServerError, "Failed to create channel rule", err)
+	}
+	return response.JSON(http.StatusOK, util.DynMap{
+		"rule": result,
+	})
+}
+
+// HandleChannelRulesPutHTTP ...
+func (g *GrafanaLive) HandleChannelRulesPutHTTP(c *models.ReqContext) response.Response {
+	body, err := ioutil.ReadAll(c.Req.Body)
+	if err != nil {
+		return response.Error(http.StatusInternalServerError, "Error reading body", err)
+	}
+	var rule pipeline.ChannelRule
+	err = json.Unmarshal(body, &rule)
+	if err != nil {
+		return response.Error(http.StatusBadRequest, "Error decoding channel rule", err)
+	}
+	if rule.Pattern == "" {
+		return response.Error(http.StatusBadRequest, "Rule pattern required", nil)
+	}
+	rule, err = g.channelRuleStorage.UpdateChannelRule(c.Req.Context(), c.OrgId, rule)
+	if err != nil {
+		return response.Error(http.StatusInternalServerError, "Failed to update channel rule", err)
+	}
+	return response.JSON(http.StatusOK, util.DynMap{
+		"rule": rule,
+	})
+}
+
+// HandleChannelRulesDeleteHTTP ...
+func (g *GrafanaLive) HandleChannelRulesDeleteHTTP(c *models.ReqContext) response.Response {
+	body, err := ioutil.ReadAll(c.Req.Body)
+	if err != nil {
+		return response.Error(http.StatusInternalServerError, "Error reading body", err)
+	}
+	var rule pipeline.ChannelRule
+	err = json.Unmarshal(body, &rule)
+	if err != nil {
+		return response.Error(http.StatusBadRequest, "Error decoding channel rule", err)
+	}
+	if rule.Pattern == "" {
+		return response.Error(http.StatusBadRequest, "Rule pattern required", nil)
+	}
+	err = g.channelRuleStorage.DeleteChannelRule(c.Req.Context(), c.OrgId, rule.Pattern)
+	if err != nil {
+		return response.Error(http.StatusInternalServerError, "Failed to delete channel rule", err)
+	}
+	return response.JSON(http.StatusOK, util.DynMap{})
 }
 
 // HandlePipelineEntitiesListHTTP ...
 func (g *GrafanaLive) HandlePipelineEntitiesListHTTP(_ *models.ReqContext) response.Response {
 	return response.JSON(http.StatusOK, util.DynMap{
-		"subscribers": []configInfo{
-			{
-				Type:        pipeline.SubscriberTypeBuiltin,
-				Description: "apply builtin feature subscribe logic",
-			},
-			{
-				Type:        pipeline.SubscriberTypeManagedStream,
-				Description: "apply managed stream subscribe logic",
-			},
-			{
-				Type:        pipeline.SubscriberTypeMultiple,
-				Description: "apply multiple subscribers",
-			},
-			{
-				Type:        pipeline.SubscriberTypeAuthorizeRole,
-				Description: "authorize user role",
-			},
-		},
-		"outputs": []configInfo{
-			{
-				Type:        pipeline.OutputTypeManagedStream,
-				Description: "Only send schema when structure changes.  Note this also requires a matching subscriber",
-				Example:     pipeline.ManagedStreamOutputConfig{},
-			},
-			{
-				Type:        pipeline.OutputTypeMultiple,
-				Description: "Send the output to multiple destinations",
-				Example:     pipeline.MultipleOutputterConfig{},
-			},
-			{
-				Type:        pipeline.OutputTypeConditional,
-				Description: "send to an output depending on frame values",
-				Example:     pipeline.ConditionalOutputConfig{},
-			},
-			{
-				Type: pipeline.OutputTypeRedirect,
-			},
-			{
-				Type: pipeline.OutputTypeThreshold,
-			},
-			{
-				Type: pipeline.OutputTypeChangeLog,
-			},
-			{
-				Type: pipeline.OutputTypeRemoteWrite,
-			},
-		},
-		"converters": []configInfo{
-			{
-				Type: pipeline.ConverterTypeJsonAuto,
-			},
-			{
-				Type: pipeline.ConverterTypeJsonExact,
-			},
-			{
-				Type:        pipeline.ConverterTypeInfluxAuto,
-				Description: "accept influx line protocol",
-				Example:     pipeline.AutoInfluxConverterConfig{},
-			},
-			{
-				Type: pipeline.ConverterTypeJsonFrame,
-			},
-		},
-		"processors": []configInfo{
-			{
-				Type:        pipeline.ProcessorTypeKeepFields,
-				Description: "list the fields that should stay",
-				Example:     pipeline.KeepFieldsProcessorConfig{},
-			},
-			{
-				Type:        pipeline.ProcessorTypeDropFields,
-				Description: "list the fields that should be removed",
-				Example:     pipeline.DropFieldsProcessorConfig{},
-			},
-			{
-				Type:        pipeline.ProcessorTypeMultiple,
-				Description: "apply multiple processors",
-				Example:     pipeline.MultipleProcessorConfig{},
-			},
-		},
+		"subscribers": pipeline.SubscribersRegistry,
+		"outputs":     pipeline.OutputsRegistry,
+		"converters":  pipeline.ConvertersRegistry,
+		"processors":  pipeline.ProcessorsRegistry,
 	})
 }
 

pkg/services/live/pipeline/config.go

@@ -4,7 +4,10 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/grafana/grafana/pkg/services/live/pipeline/tree"
+
 	"github.com/grafana/grafana/pkg/services/live/managedstream"
+	"github.com/grafana/grafana/pkg/services/live/pipeline/pattern"
 
 	"github.com/centrifugal/centrifuge"
 )
@@ -79,6 +82,43 @@ type ChannelRule struct {
 	Settings ChannelRuleSettings `json:"settings"`
 }
 
+func (r ChannelRule) Valid() (bool, string) {
+	ok, reason := pattern.Valid(r.Pattern)
+	if !ok {
+		return false, fmt.Sprintf("invalid pattern: %s", reason)
+	}
+	if r.Settings.Converter != nil {
+		if !typeRegistered(r.Settings.Converter.Type, ConvertersRegistry) {
+			return false, fmt.Sprintf("unknown converter type: %s", r.Settings.Converter.Type)
+		}
+	}
+	if r.Settings.Subscriber != nil {
+		if !typeRegistered(r.Settings.Subscriber.Type, SubscribersRegistry) {
+			return false, fmt.Sprintf("unknown subscriber type: %s", r.Settings.Subscriber.Type)
+		}
+	}
+	if r.Settings.Processor != nil {
+		if !typeRegistered(r.Settings.Processor.Type, ProcessorsRegistry) {
+			return false, fmt.Sprintf("unknown processor type: %s", r.Settings.Processor.Type)
+		}
+	}
+	if r.Settings.Outputter != nil {
+		if !typeRegistered(r.Settings.Outputter.Type, OutputsRegistry) {
+			return false, fmt.Sprintf("unknown output type: %s", r.Settings.Outputter.Type)
+		}
+	}
+	return true, ""
+}
+
+func typeRegistered(entityType string, registry []EntityInfo) bool {
+	for _, info := range registry {
+		if info.Type == entityType {
+			return true
+		}
+	}
+	return false
+}
+
 type RemoteWriteBackend struct {
 	OrgId    int64              `json:"-"`
 	UID      string             `json:"uid"`
@@ -93,6 +133,23 @@ type ChannelRules struct {
 	Rules []ChannelRule `json:"rules"`
 }
 
+func checkRulesValid(orgID int64, rules []ChannelRule) (ok bool, reason string) {
+	t := tree.New()
+	defer func() {
+		if r := recover(); r != nil {
+			reason = fmt.Sprintf("%v", r)
+			ok = false
+		}
+	}()
+	for _, rule := range rules {
+		if rule.OrgId == orgID || (rule.OrgId == 0 && orgID == 1) {
+			t.AddRoute("/"+rule.Pattern, struct{}{})
+		}
+	}
+	ok = true
+	return ok, reason
+}
+
 type MultipleConditionCheckerConfig struct {
 	Type       ConditionType            `json:"type"`
 	Conditions []ConditionCheckerConfig `json:"conditions"`
@@ -113,6 +170,9 @@ type ConditionCheckerConfig struct {
 type RuleStorage interface {
 	ListRemoteWriteBackends(_ context.Context, orgID int64) ([]RemoteWriteBackend, error)
 	ListChannelRules(_ context.Context, orgID int64) ([]ChannelRule, error)
+	CreateChannelRule(_ context.Context, orgID int64, rule ChannelRule) (ChannelRule, error)
+	UpdateChannelRule(_ context.Context, orgID int64, rule ChannelRule) (ChannelRule, error)
+	DeleteChannelRule(_ context.Context, orgID int64, pattern string) error
 }
 
 type StorageRuleBuilder struct {

pkg/services/live/pipeline/converter_json_auto.go

@@ -6,7 +6,7 @@ import (
 )
 
 type AutoJsonConverterConfig struct {
-	FieldTips map[string]Field `json:"fieldTips"`
+	FieldTips map[string]Field `json:"fieldTips,omitempty"`
 }
 
 type AutoJsonConverter struct {

pkg/services/live/pipeline/pattern/pattern.go

@@ -0,0 +1,25 @@
+package pattern
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+var patternReString = `^[A-z0-9_\-/=.:*]*$`
+var patternRe = regexp.MustCompile(patternReString)
+
+var maxPatternLength = 160
+
+func Valid(pattern string) (bool, string) {
+	if strings.HasPrefix(pattern, "/") {
+		return false, "pattern can't start with /"
+	}
+	if !patternRe.MatchString(pattern) {
+		return false, fmt.Sprintf("pattern format error, must match %s", patternReString)
+	}
+	if len(pattern) > maxPatternLength {
+		return false, fmt.Sprintf("pattern max length exceeded (%d)", maxPatternLength)
+	}
+	return true, ""
+}

pkg/services/live/pipeline/pattern/pattern_test.go

@@ -0,0 +1,37 @@
+package pattern
+
+import "testing"
+
+func TestValid(t *testing.T) {
+	type args struct {
+		pattern string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "valid",
+			args: args{
+				pattern: "xxx",
+			},
+			want: true,
+		},
+		{
+			name: "invalid",
+			args: args{
+				pattern: "/xxx",
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, _ := Valid(tt.args.pattern)
+			if got != tt.want {
+				t.Errorf("Valid() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

pkg/services/live/pipeline/registry.go

@@ -0,0 +1,91 @@
+package pipeline
+
+type EntityInfo struct {
+	Type        string      `json:"type"`
+	Description string      `json:"description"`
+	Example     interface{} `json:"example,omitempty"`
+}
+
+var SubscribersRegistry = []EntityInfo{
+	{
+		Type:        SubscriberTypeBuiltin,
+		Description: "apply builtin feature subscribe logic",
+	},
+	{
+		Type:        SubscriberTypeManagedStream,
+		Description: "apply managed stream subscribe logic",
+	},
+	{
+		Type:        SubscriberTypeMultiple,
+		Description: "apply multiple subscribers",
+	},
+	{
+		Type:        SubscriberTypeAuthorizeRole,
+		Description: "authorize user role",
+	},
+}
+
+var OutputsRegistry = []EntityInfo{
+	{
+		Type:        OutputTypeManagedStream,
+		Description: "Only send schema when structure changes.  Note this also requires a matching subscriber",
+		Example:     ManagedStreamOutputConfig{},
+	},
+	{
+		Type:        OutputTypeMultiple,
+		Description: "Send the output to multiple destinations",
+		Example:     MultipleOutputterConfig{},
+	},
+	{
+		Type:        OutputTypeConditional,
+		Description: "send to an output depending on frame values",
+		Example:     ConditionalOutputConfig{},
+	},
+	{
+		Type: OutputTypeRedirect,
+	},
+	{
+		Type: OutputTypeThreshold,
+	},
+	{
+		Type: OutputTypeChangeLog,
+	},
+	{
+		Type: OutputTypeRemoteWrite,
+	},
+}
+
+var ConvertersRegistry = []EntityInfo{
+	{
+		Type: ConverterTypeJsonAuto,
+	},
+	{
+		Type: ConverterTypeJsonExact,
+	},
+	{
+		Type:        ConverterTypeInfluxAuto,
+		Description: "accept influx line protocol",
+		Example:     AutoInfluxConverterConfig{},
+	},
+	{
+		Type: ConverterTypeJsonFrame,
+	},
+}
+
+var ProcessorsRegistry = []EntityInfo{
+	{
+		Type:        ProcessorTypeKeepFields,
+		Description: "list the fields that should stay",
+		Example:     KeepFieldsProcessorConfig{},
+	},
+	{
+		Type:        ProcessorTypeDropFields,
+		Description: "list the fields that should be removed",
+		Example:     DropFieldsProcessorConfig{},
+	},
+	{
+		Type:        ProcessorTypeMultiple,
+		Description: "apply multiple processors",
+		Example:     MultipleProcessorConfig{},
+	},
+}

pkg/services/live/pipeline/rule_cache_segmented_test.go

@@ -23,6 +23,12 @@ func (t *testBuilder) BuildRules(_ context.Context, _ int64) ([]*LiveChannelRule
 		{
 			OrgId:     1,
 			Pattern:   "stream/telegraf/:metric/:extra",
+			Outputter: NewRedirectOutput(RedirectOutputConfig{}),
+		},
+		{
+			OrgId:     1,
+			Pattern:   "stream/boom:er",
+			Converter: NewExactJsonConverter(ExactJsonConverterConfig{}),
 		},
 	}, nil
 }
@@ -42,7 +48,12 @@ func TestStorage_Get(t *testing.T) {
 	rule, ok, err = s.Get(1, "stream/telegraf/mem/rss")
 	require.NoError(t, err)
 	require.True(t, ok)
-	require.Nil(t, rule.Converter)
+	require.Equal(t, OutputTypeRedirect, rule.Outputter.Type())
+
+	rule, ok, err = s.Get(1, "stream/booms")
+	require.NoError(t, err)
+	require.True(t, ok)
+	require.Equal(t, ConverterTypeJsonExact, rule.Converter.Type())
 }
 
 func BenchmarkRuleGet(b *testing.B) {

pkg/services/live/pipeline/storage_file.go

@@ -3,8 +3,10 @@ package pipeline
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io/ioutil"
+	"os"
 	"path/filepath"
 )
 
@@ -33,14 +35,9 @@ func (f *FileStorage) ListRemoteWriteBackends(_ context.Context, orgID int64) ([
 }
 
 func (f *FileStorage) ListChannelRules(_ context.Context, orgID int64) ([]ChannelRule, error) {
-	ruleBytes, err := ioutil.ReadFile(filepath.Join(f.DataPath, "pipeline", "live-channel-rules.json"))
+	channelRules, err := f.readRules()
 	if err != nil {
-		return nil, fmt.Errorf("can't read ./data/live-channel-rules.json file: %w", err)
-	}
-	var channelRules ChannelRules
-	err = json.Unmarshal(ruleBytes, &channelRules)
-	if err != nil {
-		return nil, fmt.Errorf("can't unmarshal live-channel-rules.json data: %w", err)
+		return nil, fmt.Errorf("can't read channel rules: %w", err)
 	}
 	var rules []ChannelRule
 	for _, r := range channelRules.Rules {
@@ -50,3 +47,124 @@ func (f *FileStorage) ListChannelRules(_ context.Context, orgID int64) ([]Channe
 	}
 	return rules, nil
 }
+
+func (f *FileStorage) CreateChannelRule(_ context.Context, orgID int64, rule ChannelRule) (ChannelRule, error) {
+	channelRules, err := f.readRules()
+	if err != nil {
+		return rule, fmt.Errorf("can't read channel rules: %w", err)
+	}
+	ok, reason := rule.Valid()
+	if !ok {
+		return rule, fmt.Errorf("invalid channel rule: %s", reason)
+	}
+	for _, existingRule := range channelRules.Rules {
+		if patternMatch(orgID, rule.Pattern, existingRule) {
+			return rule, fmt.Errorf("pattern already exists in org: %s", rule.Pattern)
+		}
+	}
+	channelRules.Rules = append(channelRules.Rules, rule)
+	err = f.saveChannelRules(orgID, channelRules)
+	return rule, err
+}
+
+func patternMatch(orgID int64, pattern string, existingRule ChannelRule) bool {
+	return pattern == existingRule.Pattern && (existingRule.OrgId == orgID || (existingRule.OrgId == 0 && orgID == 1))
+}
+
+func (f *FileStorage) UpdateChannelRule(ctx context.Context, orgID int64, rule ChannelRule) (ChannelRule, error) {
+	channelRules, err := f.readRules()
+	if err != nil {
+		return rule, fmt.Errorf("can't read channel rules: %w", err)
+	}
+
+	ok, reason := rule.Valid()
+	if !ok {
+		return rule, fmt.Errorf("invalid channel rule: %s", reason)
+	}
+
+	index := -1
+
+	for i, existingRule := range channelRules.Rules {
+		if patternMatch(orgID, rule.Pattern, existingRule) {
+			index = i
+			break
+		}
+	}
+	if index > -1 {
+		channelRules.Rules[index] = rule
+	} else {
+		return f.CreateChannelRule(ctx, orgID, rule)
+	}
+
+	err = f.saveChannelRules(orgID, channelRules)
+	return rule, err
+}
+
+func removeChannelRuleByIndex(s []ChannelRule, index int) []ChannelRule {
+	return append(s[:index], s[index+1:]...)
+}
+
+func (f *FileStorage) ruleFilePath() string {
+	return filepath.Join(f.DataPath, "pipeline", "live-channel-rules.json")
+}
+
+func (f *FileStorage) readRules() (ChannelRules, error) {
+	ruleFile := f.ruleFilePath()
+	// Safe to ignore gosec warning G304.
+	// nolint:gosec
+	ruleBytes, err := ioutil.ReadFile(ruleFile)
+	if err != nil {
+		return ChannelRules{}, fmt.Errorf("can't read ./data/live-channel-rules.json file: %w", err)
+	}
+	var channelRules ChannelRules
+	err = json.Unmarshal(ruleBytes, &channelRules)
+	if err != nil {
+		return ChannelRules{}, fmt.Errorf("can't unmarshal live-channel-rules.json data: %w", err)
+	}
+	return channelRules, nil
+}
+
+func (f *FileStorage) saveChannelRules(orgID int64, rules ChannelRules) error {
+	ok, reason := checkRulesValid(orgID, rules.Rules)
+	if !ok {
+		return errors.New(reason)
+	}
+	ruleFile := f.ruleFilePath()
+	// Safe to ignore gosec warning G304.
+	// nolint:gosec
+	file, err := os.OpenFile(ruleFile, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		return fmt.Errorf("can't open channel rule file: %w", err)
+	}
+	defer func() { _ = file.Close() }()
+	enc := json.NewEncoder(file)
+	enc.SetIndent("", "  ")
+	err = enc.Encode(rules)
+	if err != nil {
+		return fmt.Errorf("can't save rules to file: %w", err)
+	}
+	return nil
+}
+
+func (f *FileStorage) DeleteChannelRule(_ context.Context, orgID int64, pattern string) error {
+	channelRules, err := f.readRules()
+	if err != nil {
+		return fmt.Errorf("can't read channel rules: %w", err)
+	}
+
+	index := -1
+	for i, existingRule := range channelRules.Rules {
+		if patternMatch(orgID, pattern, existingRule) {
+			index = i
+			break
+		}
+	}
+
+	if index > -1 {
+		channelRules.Rules = removeChannelRuleByIndex(channelRules.Rules, index)
+	} else {
+		return fmt.Errorf("rule not found")
+	}
+
+	return f.saveChannelRules(orgID, channelRules)
+}