feat: add opencensus tracing and metrics support

config/dev.yml

@@ -69,8 +69,14 @@ cors_debug: true
 #   sheep: sheep
 
 # open opencensus tracing and metrics
-telemetry:
+# telemetry:
-  enable: false
+#   debug: true
+#   metrics:
+#     exporter: "prometheus"
+#   tracing:
+#     exporter: "zipkin"
+#     endpoint: "http://zipkin:9411/api/v2/spans"
+#     sample: 0.2
 
 auth:
   # Can be 'rails' or 'jwt'

config/prod.yml

@@ -65,7 +65,12 @@ database:
 
   # database ping timeout is used for db health checking
   ping_timeout: 5m
-
 # open opencensus tracing and metrics
-telemetry:
+# telemetry:
-  enable: false
+#   debug: false
+#   metrics:
+#     exporter: "prometheus"
+#   tracing:
+#     exporter: "zipkin"
+#     endpoint: "http://zipkin:9411/api/v2/spans"
+#     sample: 0.6

core/init.go

@@ -216,27 +216,23 @@ func addRoles(c *Config, qc *qcode.Compiler) error {
 }
 
 func addRole(qc *qcode.Compiler, r Role, t RoleTable) error {
-	blocked := struct {
+	ro := true // read-only
-		readOnly bool
-		query    bool
-		insert   bool
-		update   bool
-		delete   bool
-	}{true, true, true, true, true}
 
-	if r.Name == "anon" {
+	if r.Name != "anon" {
-		blocked.query = false
+		ro = false
-	} else {
-		blocked.readOnly = false
-		blocked.query = false
-		blocked.insert = false
-		blocked.update = false
-		blocked.delete = false
 	}
 
 	if t.ReadOnly != nil {
-		blocked.readOnly = *t.ReadOnly
+		ro = *t.ReadOnly
 	}
+
+	blocked := struct {
+		query  bool
+		insert bool
+		update bool
+		delete bool
+	}{false, ro, ro, ro}
+
 	if t.Query.Block != nil {
 		blocked.query = *t.Query.Block
 	}
@@ -279,11 +275,10 @@ func addRole(qc *qcode.Compiler, r Role, t RoleTable) error {
 	}
 
 	return qc.AddRole(r.Name, t.Name, qcode.TRConfig{
-		ReadOnly: blocked.readOnly,
+		Query:  query,
-		Query:    query,
+		Insert: insert,
-		Insert:   insert,
+		Update: update,
-		Update:   update,
+		Delete: del,
-		Delete:   del,
 	})
 }
 

core/internal/integration_tests/cockroachdb/cockroachdb_test.go

@@ -17,7 +17,6 @@ import (
 )
 
 func TestCockroachDB(t *testing.T) {
-
 	dir, err := ioutil.TempDir("", "temp-cockraochdb-")
 	if err != nil {
 		log.Fatal(err)
@@ -33,6 +32,7 @@ func TestCockroachDB(t *testing.T) {
 	err = cmd.Start()
 	if err != nil {
 		t.Skip("is CockroachDB installed?: " + err.Error())
+		return
 	}
 	fmt.Println("started temporary cockroach db")
 

core/internal/integration_tests/integration_tests.go

@@ -55,13 +55,15 @@ func TestSuperGraph(t *testing.T, db *sql.DB, before func(t *testing.T)) {
 	config.AllowListFile = "./allow.list"
 	config.RolesQuery = `SELECT * FROM users WHERE id = $user_id`
 
+	blockFalse := false
+
 	config.Roles = []core.Role{
 		core.Role{
 			Name: "anon",
 			Tables: []core.RoleTable{
-				core.RoleTable{Name: "users", Query: core.Query{Limit: 100}},
+				core.RoleTable{Name: "users", ReadOnly: &blockFalse, Query: core.Query{Limit: 100}},
-				core.RoleTable{Name: "product", Query: core.Query{Limit: 100}},
+				core.RoleTable{Name: "product", ReadOnly: &blockFalse, Query: core.Query{Limit: 100}},
-				core.RoleTable{Name: "line_item", Query: core.Query{Limit: 100}},
+				core.RoleTable{Name: "line_item", ReadOnly: &blockFalse, Query: core.Query{Limit: 100}},
 			},
 		},
 	}

core/internal/integration_tests/postgresql/postgresql_test.go

@@ -15,13 +15,13 @@ func TestCockroachDB(t *testing.T) {
 	url, found := os.LookupEnv("SG_POSTGRESQL_TEST_URL")
 	if !found {
 		t.Skip("set the SG_POSTGRESQL_TEST_URL env variable if you want to run integration tests against a PostgreSQL database")
+	} else {
+		db, err := sql.Open("pgx", url)
+		require.NoError(t, err)
+
+		integration_tests.DropSchema(t, db)
+		integration_tests.SetupSchema(t, db)
+		integration_tests.TestSuperGraph(t, db, func(t *testing.T) {
+		})
 	}
-
-	db, err := sql.Open("pgx", url)
-	require.NoError(t, err)
-
-	integration_tests.DropSchema(t, db)
-	integration_tests.SetupSchema(t, db)
-	integration_tests.TestSuperGraph(t, db, func(t *testing.T) {
-	})
 }

core/internal/qcode/config.go

@@ -40,11 +40,10 @@ type DeleteConfig struct {
 }
 
 type TRConfig struct {
-	ReadOnly bool
+	Query  QueryConfig
-	Query    QueryConfig
+	Insert InsertConfig
-	Insert   InsertConfig
+	Update UpdateConfig
-	Update   UpdateConfig
+	Delete DeleteConfig
-	Delete   DeleteConfig
 }
 
 type trval struct {

core/internal/qcode/qcode.go

@@ -207,7 +207,7 @@ func NewFilter() *Exp {
 
 func (com *Compiler) AddRole(role, table string, trc TRConfig) error {
 	var err error
-	trv := &trval{readOnly: trc.ReadOnly}
+	trv := &trval{}
 
 	// query config
 	trv.query.fil, trv.query.filNU, err = compileFilter(trc.Query.Filters)
@@ -341,17 +341,17 @@ func (com *Compiler) compileQuery(qc *QCode, op *Operation, role string) error {
 			}
 
 		case QTInsert:
-			if trv.insert.block || trv.readOnly {
+			if trv.insert.block {
 				return fmt.Errorf("insert blocked: %s", field.Name)
 			}
 
 		case QTUpdate:
-			if trv.update.block || trv.readOnly {
+			if trv.update.block {
 				return fmt.Errorf("update blocked: %s", field.Name)
 			}
 
 		case QTDelete:
-			if trv.delete.block || trv.readOnly {
+			if trv.delete.block {
 				return fmt.Errorf("delete blocked: %s", field.Name)
 			}
 		}

go.mod

@@ -1,6 +1,10 @@
 module github.com/dosco/super-graph
 
 require (
+	contrib.go.opencensus.io/exporter/aws v0.0.0-20190807220307-c50fb1bd7f21
+	contrib.go.opencensus.io/exporter/prometheus v0.1.0
+	contrib.go.opencensus.io/exporter/stackdriver v0.13.1
+	contrib.go.opencensus.io/exporter/zipkin v0.1.1
 	contrib.go.opencensus.io/integrations/ocsql v0.1.6
 	github.com/DATA-DOG/go-sqlmock v1.4.1
 	github.com/GeertJohan/go.rice v1.0.0
@@ -22,6 +26,7 @@ require (
 	github.com/jackc/pgtype v1.3.0
 	github.com/jackc/pgx/v4 v4.6.0
 	github.com/mitchellh/mapstructure v1.2.2 // indirect
+	github.com/openzipkin/zipkin-go v0.2.2
 	github.com/pelletier/go-toml v1.7.0 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/rs/cors v1.7.0
@@ -33,7 +38,7 @@ require (
 	github.com/spf13/viper v1.6.3
 	github.com/stretchr/testify v1.5.1
 	github.com/valyala/fasttemplate v1.1.0
-	go.opencensus.io v0.22.3 // indirect
+	go.opencensus.io v0.22.3
 	go.uber.org/zap v1.14.1
 	golang.org/x/crypto v0.0.0-20200414173820-0848c9571904
 	golang.org/x/sys v0.0.0-20200413165638-669c56c373c4 // indirect

go.sum

@@ -1,8 +1,25 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1 h1:lRi0CHyU+ytlvylOlFKKq0af6JncuyoRh1J+QJBqQx0=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+contrib.go.opencensus.io/exporter/aws v0.0.0-20190807220307-c50fb1bd7f21 h1:H3O7Pfgex4O08w1PyXje7lhiRbPNd687lz48jfWWB1s=
+contrib.go.opencensus.io/exporter/aws v0.0.0-20190807220307-c50fb1bd7f21/go.mod h1:uu1P0UCM/6RbsMrgPa98ll8ZcHM858i/AD06a9aLRCA=
+contrib.go.opencensus.io/exporter/prometheus v0.1.0 h1:SByaIoWwNgMdPSgl5sMqM2KDE5H/ukPWBRo314xiDvg=
+contrib.go.opencensus.io/exporter/prometheus v0.1.0/go.mod h1:cGFniUXGZlKRjzOyuZJ6mgB+PgBcCIa79kEKR8YCW+A=
+contrib.go.opencensus.io/exporter/stackdriver v0.13.1 h1:RX9W6FelAqTVnBi/bRXJLXr9n18v4QkQwZYIdnNS51I=
+contrib.go.opencensus.io/exporter/stackdriver v0.13.1/go.mod h1:z2tyTZtPmQ2HvWH4cOmVDgtY+1lomfKdbLnkJvZdc8c=
+contrib.go.opencensus.io/exporter/zipkin v0.1.1 h1:PR+1zWqY8ceXs1qDQQIlgXe+sdiwCf0n32bH4+Epk8g=
+contrib.go.opencensus.io/exporter/zipkin v0.1.1/go.mod h1:GMvdSl3eJ2gapOaLKzTKE3qDgUkJ86k9k3yY2eqwkzc=
 contrib.go.opencensus.io/integrations/ocsql v0.1.6 h1:9qmZJBlnMtffShflmfhW4EZK7M+CujIDG4bEwUrg+ms=
 contrib.go.opencensus.io/integrations/ocsql v0.1.6/go.mod h1:8DsSdjz3F+APR+0z0WkU1aRorQCFfRxvqjUUPMbF3fE=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/DATA-DOG/go-sqlmock v1.4.1 h1:ThlnYciV1iM/V0OSF/dtkqWb6xo5qITT1TJBG1MRDJM=
 github.com/DATA-DOG/go-sqlmock v1.4.1/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
 github.com/GeertJohan/go.incremental v1.0.0 h1:7AH+pY1XUgQE4Y1HcXYaMqAI0m9yrFqo/jt0CW30vsg=
@@ -12,6 +29,8 @@ github.com/GeertJohan/go.rice v1.0.0/go.mod h1:eH6gbSOAUv07dQuZVnBmoDP8mgsM1rtix
 github.com/NYTimes/gziphandler v1.1.1 h1:ZUDjpQae29j0ryrS0u/B8HZfJBtBQHjqw2rQ2cqUQ3I=
 github.com/NYTimes/gziphandler v1.1.1/go.mod h1:n/CVRwUEOgIxrgPvAQhUUr9oeUtvrhMomdKFjzJNB0c=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
+github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/adjust/gorails v0.0.0-20171013043634-2786ed0c03d3 h1:+qz9Ga6l6lKw6fgvk5RMV5HQznSLvI8Zxajwdj4FhFg=
 github.com/adjust/gorails v0.0.0-20171013043634-2786ed0c03d3/go.mod h1:FlkD11RtgMTYjVuBnb7cxoHmQGqvPpCsr2atC88nl/M=
 github.com/akavel/rsrc v0.8.0 h1:zjWn7ukO9Kc5Q62DOJCcxGpXC18RawVtYAGdz2aLlfw=
@@ -19,6 +38,10 @@ github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkK
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/aws/aws-sdk-go v1.15.27 h1:i75BxN4Es/8rTVQbEKAP1WCiIhhz635xTNeDdZJRAXQ=
+github.com/aws/aws-sdk-go v1.15.27/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
+github.com/aws/aws-sdk-go v1.23.20 h1:2CBuL21P0yKdZN5urf2NxKa1ha8fhnY+A3pBCHFeZoA=
+github.com/aws/aws-sdk-go v1.23.20/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
@@ -26,6 +49,8 @@ github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b h1:L/QXpzIa3pO
 github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b/go.mod h1:H0wQNHz2YrLsuXOZozoeDmnHXkNCRmMW0gwFWDfEZDA=
 github.com/brianvoe/gofakeit/v5 v5.2.0 h1:De9X+2PQum9U2zCaIDxLV7wx0YBL6c7RN2sFBImzHGI=
 github.com/brianvoe/gofakeit/v5 v5.2.0/go.mod h1:/ZENnKqX+XrN8SORLe/fu5lZDIo1tuPncWuRD+eyhSI=
+github.com/census-instrumentation/opencensus-proto v0.2.1 h1:glEXhBS5PSLLv4IXzLA5yPRVX4bilULVyxxbrfOtDAk=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
@@ -60,6 +85,10 @@ github.com/dlclark/regexp2 v1.2.0 h1:8sAhBGEM0dRWogWqWyQeIJnxjWO6oIjl8FKqREDsGfk
 github.com/dlclark/regexp2 v1.2.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
 github.com/dop251/goja v0.0.0-20200424152103-d0b8fda54cd0 h1:EfFAcaAwGai/wlDCWwIObHBm3T2C2CCPX/SaS0fpOJ4=
 github.com/dop251/goja v0.0.0-20200424152103-d0b8fda54cd0/go.mod h1:Mw6PkjjMXWbTj+nnj4s3QPXq1jaT0s5pC0iFD4+BOAA=
+github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
+github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
+github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
+github.com/envoyproxy/go-control-plane v0.6.9/go.mod h1:SBwIajubJHhxtWwsL9s8ss4safvEdbitLhGGK48rN6g=
 github.com/friendsofgo/graphiql v0.2.2/go.mod h1:8Y2kZ36AoTGWs78+VRpvATyt3LJBx0SZXmay80ZTRWo=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
@@ -68,6 +97,8 @@ github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4
 github.com/garyburd/redigo v1.6.0 h1:0VruCpn7yAIIu7pWVClQC8wxCJEcG3nyzpMSHKi1PQc=
 github.com/garyburd/redigo v1.6.0/go.mod h1:NR3MbYisc3/PwhQ00EMzDiPmrwpPxAn5GI05/YaO1SY=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-ini/ini v1.25.4 h1:Mujh4R/dH6YL8bxuISne3xX2+qcQ9p0IxKAP6ExWoUo=
+github.com/go-ini/ini v1.25.4/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
@@ -78,24 +109,41 @@ github.com/gobuffalo/flect v0.2.1 h1:GPoRjEN0QObosV4XwuoWvSd5uSiL0N3e91/xqyY4crQ
 github.com/gobuffalo/flect v0.2.1/go.mod h1:vmkQwuZYhN5Pc4ljYQZzP+1sq+NEkK+lh20jmEmX3jc=
 github.com/gofrs/uuid v3.2.0+incompatible h1:y12jRkkFxsd7GpqdSZ+/KCs/fJbqpEXSGd4+jfEaewE=
 github.com/gofrs/uuid v3.2.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
+github.com/gogo/googleapis v1.1.0/go.mod h1:gf4bu3Q80BeJ6H1S1vYPm8/ELATdvryBaNFGgqEef3s=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
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@@ -104,8 +152,11 @@ github.com/gosimple/slug v1.9.0/go.mod h1:AMZ+sOVe65uByN3kgEyf9WEBKBCSS+dJjMX9x4
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@@ -152,8 +203,13 @@ github.com/jackc/puddle v0.0.0-20190608224051-11cab39313c9/go.mod h1:m4B5Dj62Y0f
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@@ -172,6 +228,7 @@ github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
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@@ -198,34 +255,47 @@ github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRW
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@@ -274,6 +344,7 @@ github.com/spf13/viper v1.4.0 h1:yXHLWeravcrgGyFSyCgdYpXQ9dR9c/WED3pg1RhxqEU=
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@@ -304,6 +375,10 @@ github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q
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+go.opencensus.io v0.15.0/go.mod h1:UffZAU+4sDEINUGP/B7UfBBkq4fqLu9zXAX7ke6CHW0=
+go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
+go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
+go.opencensus.io v0.22.1/go.mod h1:Ap50jQcDJrx6rB6VgeeFPtuPIf3wMRvRfrfYDO6+BmA=
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@@ -324,49 +399,74 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90Pveol
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+google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
+google.golang.org/appengine v1.6.2 h1:j8RI1yW0SkI+paT6uGwMlrMI/6zwYA6/CFil8rxOzGI=
+google.golang.org/appengine v1.6.2/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb h1:i1Ppqkc3WQXikh8bXiwHqAN5Rv3/qDCcRk0/Otx73BY=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51 h1:Ex1mq5jaJof+kRnYi3SlYJ8KKa9Ao3NHyIT5XJ1gF6U=
+google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
+google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.0 h1:G+97AoqBnmZIT91cLG/EkCoK9NSelj64P8bOHHNmGn0=
 google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+google.golang.org/grpc v1.23.1 h1:q4XQuHFC6I28BKZpo6IYyb3mNO+l7lSOxRuYTCiDfXk=
+google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -416,12 +549,14 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/inconshreveable/log15.v2 v2.0.0-20180818164646-67afb5ed74ec/go.mod h1:aPpfJ7XW+gOuirDoZ8gHhLh3kZ1B08FtV2bbmy7Jv3s=
 gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.55.0 h1:E8yzL5unfpW3M6fz/eB7Cb5MQAYSZ7GKo4Qth+N2sgQ=
 gopkg.in/ini.v1 v1.55.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
@@ -429,7 +564,12 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099 h1:XJP7lxbSxWLOMNdBE4B/STaqVy6L73o0knwj2vIlxnw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=

internal/serv/api.go

@@ -24,8 +24,10 @@ type Config struct {
 	Core `mapstructure:",squash"`
 	Serv `mapstructure:",squash"`
 
-	cpath string
+	closeFn  func()
-	vi    *viper.Viper
+	hostPort string
+	cpath    string
+	vi       *viper.Viper
 }
 
 // Serv struct contains config values used by the Super Graph service
@@ -50,7 +52,19 @@ type Serv struct {
 
 	// Telemetry struct contains OpenCensus metrics and tracing related config
 	Telemetry struct {
-		Enable bool
+		Debug   bool
+		Metrics struct {
+			Exporter  string
+			Endpoint  string
+			Namespace string
+			Key       string
+		}
+
+		Tracing struct {
+			Exporter string
+			Endpoint string
+			Sample   string
+		}
 	}
 
 	Auth  auth.Auth

internal/serv/cmd.go

@@ -19,8 +19,8 @@ const (
 
 var (
 	// These variables are set using -ldflags
-	version        string
+	version        string = "unknown"
-	gitBranch      string
+	gitBranch      string = "unknown"
 	lastCommitSHA  string
 	lastCommitTime string
 )

internal/serv/config.go

@@ -111,6 +111,10 @@ func GetConfigName() string {
 	return ge
 }
 
+func (c *Config) telemetryEnabled() bool {
+	return c.Telemetry.Metrics.Exporter != "" || c.Telemetry.Tracing.Exporter != ""
+}
+
 func (c *Config) relPath(p string) string {
 	if filepath.IsAbs(p) {
 		return p

internal/serv/init.go

@@ -217,7 +217,7 @@ func initDB(c *Config, useDB bool) (*sql.DB, error) {
 	// 	return errors.New("failed to open db")
 	// }
 
-	if conf.Telemetry.Enable {
+	if conf.telemetryEnabled() {
 		driverName, err = ocsql.Register(driverName, ocsql.WithAllTraceOptions(), ocsql.WithInstanceName(conf.AppName))
 		if err != nil {
 			return nil, fmt.Errorf("unable to register ocsql driver: %v", err)
@@ -242,7 +242,7 @@ func initDB(c *Config, useDB bool) (*sql.DB, error) {
 		return nil, fmt.Errorf("unable to open db connection: %v", err)
 	}
 
-	if conf.Telemetry.Enable {
+	if conf.telemetryEnabled() {
 		defer ocsql.RecordStats(db, 2*time.Second)()
 	}
 

internal/serv/serv.go

@@ -37,7 +37,6 @@ func initWatcher() {
 }
 
 func startHTTP() {
-	var hostPort string
 	var appName string
 
 	defaultHP := "0.0.0.0:8080"
@@ -56,12 +55,12 @@ func startHTTP() {
 				hp[1] = conf.Port
 			}
 
-			hostPort = fmt.Sprintf("%s:%s", hp[0], hp[1])
+			conf.hostPort = fmt.Sprintf("%s:%s", hp[0], hp[1])
 		}
 	}
 
-	if len(hostPort) == 0 {
+	if len(conf.hostPort) == 0 {
-		hostPort = defaultHP
+		conf.hostPort = defaultHP
 	}
 
 	routes, err := routeHandler()
@@ -70,7 +69,7 @@ func startHTTP() {
 	}
 
 	srv := &http.Server{
-		Addr:           hostPort,
+		Addr:           conf.hostPort,
 		Handler:        routes,
 		ReadTimeout:    5 * time.Second,
 		WriteTimeout:   10 * time.Second,
@@ -90,13 +89,15 @@ func startHTTP() {
 	}()
 
 	srv.RegisterOnShutdown(func() {
+		if conf.closeFn != nil {
+			conf.closeFn()
+		}
 		db.Close()
+		log.Fatalln("INF shutdown complete")
 	})
 
-	log.Printf("INF version: %s, git-branch: %s, host-port: %s, app-name: %s, env: %s\n",
+	log.Printf("INF Super Graph started, version: %s, git-branch: %s, host-port: %s, app-name: %s, env: %s\n",
-		version, gitBranch, hostPort, appName, env)
+		version, gitBranch, conf.hostPort, appName, env)
-
-	log.Printf("INF %s started\n", serverName)
 
 	if err := srv.ListenAndServe(); err != http.ErrServerClosed {
 		log.Fatalln("INF server closed")
@@ -106,6 +107,7 @@ func startHTTP() {
 }
 
 func routeHandler() (http.Handler, error) {
+	var err error
 	mux := http.NewServeMux()
 
 	if conf == nil {
@@ -142,6 +144,13 @@ func routeHandler() (http.Handler, error) {
 		mux.Handle(k, v)
 	}
 
+	if conf.telemetryEnabled() {
+		conf.closeFn, err = enableObservability(mux)
+		if err != nil {
+			return nil, err
+		}
+	}
+
 	fn := func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Server", serverName)
 		mux.ServeHTTP(w, r)

internal/serv/telemetry.go

@@ -0,0 +1,139 @@
+package serv
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+	"sync"
+
+	"contrib.go.opencensus.io/exporter/aws"
+	"contrib.go.opencensus.io/exporter/prometheus"
+	"contrib.go.opencensus.io/exporter/stackdriver"
+
+	"contrib.go.opencensus.io/exporter/zipkin"
+	"contrib.go.opencensus.io/integrations/ocsql"
+	stdzipkin "github.com/openzipkin/zipkin-go"
+	httpreporter "github.com/openzipkin/zipkin-go/reporter/http"
+	"go.opencensus.io/stats/view"
+	"go.opencensus.io/trace"
+	"go.opencensus.io/zpages"
+)
+
+func enableObservability(mux *http.ServeMux) (func(), error) {
+	// Enable OpenCensus zPages
+	if conf.Telemetry.Debug {
+		zpages.Handle(mux, "/telemetry")
+	}
+
+	// Enable ocsql metrics with OpenCensus
+	ocsql.RegisterAllViews()
+
+	var mex view.Exporter
+	var tex trace.Exporter
+
+	var mCloseFn, tCloseFn func()
+	var err error
+
+	// Set up the metrics exporter
+	switch conf.Telemetry.Metrics.Exporter {
+	case "prometheus":
+		ep := "/metrics"
+
+		if conf.Telemetry.Metrics.Endpoint != "" {
+			ep = conf.Telemetry.Metrics.Endpoint
+		}
+
+		ex, err1 := prometheus.NewExporter(prometheus.Options{Namespace: conf.Telemetry.Metrics.Namespace})
+		if err == nil {
+			mux.Handle(ep, ex)
+			log.Printf("INF Prometheus exporter listening on: %s", ep)
+		}
+		mex, err = view.Exporter(ex), err1
+
+	case "stackdriver":
+		mex, err = stackdriver.NewExporter(stackdriver.Options{ProjectID: conf.Telemetry.Metrics.Key})
+		if err == nil {
+			log.Println("INF Google Stackdriver exporter initialized")
+		}
+
+	case "":
+		log.Println("INF No OpenCensus metrics exporter initialized")
+
+	default:
+		err = fmt.Errorf("invalid metrics exporter")
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("ERR OpenCensus: %s: %v", conf.Telemetry.Metrics, err)
+	}
+
+	if mex != nil {
+		// Register the exporter
+		view.RegisterExporter(mex)
+	}
+
+	// Set up the tracing exporter
+	switch conf.Telemetry.Tracing.Exporter {
+	case "xray", "aws":
+		ex, err1 := aws.NewExporter(aws.WithVersion("latest"))
+		if err == nil {
+			tCloseFn = func() { ex.Flush() }
+			log.Println("INF Amazon X-Ray exporter initialized")
+		}
+		tex, err = trace.Exporter(ex), err1
+
+	case "zipkin":
+		// The local endpoint stores the name and address of the local service
+		lep, err := stdzipkin.NewEndpoint(conf.AppName, conf.hostPort)
+		if err != nil {
+			return nil, err
+		}
+
+		// The Zipkin reporter takes collected spans from the app and reports them to the backend
+		// http://localhost:9411/api/v2/spans is the default for the Zipkin Span v2
+		re := httpreporter.NewReporter(conf.Telemetry.Tracing.Endpoint)
+		tCloseFn = func() { re.Close() }
+		tex = zipkin.NewExporter(re, lep)
+
+	case "":
+		log.Println("INF No OpenCensus tracing exporter initialized")
+
+	default:
+		err = fmt.Errorf("invalid tracing exporter")
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("ERR OpenCensus: %s: %v", conf.Telemetry.Tracing, err)
+	}
+
+	if tex != nil {
+		trace.RegisterExporter(tex)
+		sample := conf.Telemetry.Tracing.Sample
+
+		if sample == "always" {
+			trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
+
+		} else {
+			prob := 0.5
+			if v, err := strconv.ParseFloat(sample, 10); err == nil {
+				prob = v
+			}
+			trace.ApplyConfig(trace.Config{DefaultSampler: trace.ProbabilitySampler(prob)})
+
+		}
+	}
+
+	var closeOnce sync.Once
+
+	return func() {
+		// Flush and shutdown the Zipkin HTTP reporter
+		closeOnce.Do(func() {
+			if mCloseFn != nil {
+				mCloseFn()
+			}
+			if tCloseFn != nil {
+				tCloseFn()
+			}
+		})
+	}, err
+}

internal/serv/tmpl/dev.yml

@@ -69,6 +69,16 @@ cors_debug: false
 #   person: people
 #   sheep: sheep
 
+# open opencensus tracing and metrics
+# telemetry:
+#   debug: true
+#   metrics:
+#     exporter: "prometheus"
+#   tracing:
+#     exporter: "zipkin"
+#     endpoint: "http://zipkin:9411/api/v2/spans"
+#     sample: 0.6
+
 auth:
   # Can be 'rails', 'jwt' or 'header'
   type: rails

internal/serv/tmpl/prod.yml

@@ -68,6 +68,16 @@ reload_on_config_change: false
 # SG_AUTH_RAILS_REDIS_PASSWORD
 # SG_AUTH_JWT_PUBLIC_KEY_FILE
 
+# open opencensus tracing and metrics
+# telemetry:
+#   debug: false
+#   metrics:
+#     exporter: "prometheus"
+#   tracing:
+#     exporter: "zipkin"
+#     endpoint: "http://zipkin:9411/api/v2/spans"
+#     sample: 0.6
+
 database:
   type: postgres
   host: db

internal/serv/utils_test.go

@@ -3,6 +3,8 @@ package serv
 import (
 	"strings"
 	"testing"
+
+	"github.com/brianvoe/gofakeit/v5"
 )
 
 func TestGQLHash1(t *testing.T) {
@@ -229,3 +231,7 @@ func TestGQLHashWithVars2(t *testing.T) {
 		t.Fatal("Hashes don't match they should")
 	}
 }
+
+func TestGoFake(t *testing.T) {
+	gofakeit.Person()
+}