Elastic APM tracer implementation

docs/content/observability/tracing/elastic.md

@@ -0,0 +1,88 @@
+# Elastic
+
+To enable the Elastic:
+
+```toml tab="File (TOML)"
+[tracing]
+  [tracing.elastic]
+```
+
+```yaml tab="File (YAML)"
+tracing:
+  elastic: {}
+```
+
+```bash tab="CLI"
+--tracing.elastic=true
+```
+
+#### `serverURL`
+
+_Optional, Default="http://localhost:8200"_
+
+APM ServerURL is the URL of the Elastic APM server.
+
+```toml tab="File (TOML)"
+[tracing]
+  [tracing.elastic]
+    serverURL = "http://apm:8200"
+```
+
+```yaml tab="File (YAML)"
+tracing:
+  elastic:
+    serverURL: "http://apm:8200"
+```
+
+```bash tab="CLI"
+--tracing.elastic.serverurl="http://apm:8200"
+```
+
+#### `secretToken`
+
+_Optional, Default=""_
+
+APM Secret Token is the token used to connect to Elastic APM Server.
+
+```toml tab="File (TOML)"
+[tracing]
+  [tracing.elastic]
+    secretToken = "mytoken"
+```
+
+```yaml tab="File (YAML)"
+tracing:
+  elastic:
+    secretToken: "mytoken"
+```
+
+```bash tab="CLI"
+--tracing.elastic.secrettoken="mytoken"
+```
+
+#### `serviceEnvironment`
+
+_Optional, Default=""_
+
+APM Service Environment is the name of the environment Traefik is deployed in, e.g. `production` or `staging`.
+
+```toml tab="File (TOML)"
+[tracing]
+  [tracing.elastic]
+    serviceEnvironment = "production"
+```
+
+```yaml tab="File (YAML)"
+tracing:
+  elastic:
+    serviceEnvironment: "production"
+```
+
+```bash tab="CLI"
+--tracing.elastic.serviceenvironment="production"
+```
+
+### Further
+
+Additional configuration of Elastic APM Go agent can be done using environment variables.
+See [APM Go agent reference](https://www.elastic.co/guide/en/apm/agent/go/current/configuration.html).

docs/content/reference/static-configuration/cli-ref.md

@@ -570,6 +570,18 @@ Specifies the header name that will be used to store the sampling priority.
 `--tracing.datadog.traceidheadername`:  
 Specifies the header name that will be used to store the trace ID.
 
+`--tracing.elastic`:  
+Settings for Elastic. (Default: ```false```)
+
+`--tracing.elastic.secrettoken`:  
+Set the token used to connect to Elastic APM Server.
+
+`--tracing.elastic.serverurl`:  
+Set the URL of the Elastic APM server.
+
+`--tracing.elastic.serviceenvironment`:  
+Set the name of the environment Traefik is deployed in, e.g. 'production' or 'staging'.
+
 `--tracing.haystack`:  
 Settings for Haystack. (Default: ```false```)
 

docs/content/reference/static-configuration/env-ref.md

@@ -570,6 +570,18 @@ Specifies the header name that will be used to store the sampling priority.
 `TRAEFIK_TRACING_DATADOG_TRACEIDHEADERNAME`:  
 Specifies the header name that will be used to store the trace ID.
 
+`TRAEFIK_TRACING_ELASTIC`:  
+Settings for Elastic. (Default: ```false```)
+
+`TRAEFIK_TRACING_ELASTIC_SECRETTOKEN`:  
+Set the token used to connect to Elastic APM Server.
+
+`TRAEFIK_TRACING_ELASTIC_SERVERURL`:  
+Set the URL of the Elastic APM server.
+
+`TRAEFIK_TRACING_ELASTIC_SERVICEENVIRONMENT`:  
+Set the name of the environment Traefik is deployed in, e.g. 'production' or 'staging'.
+
 `TRAEFIK_TRACING_HAYSTACK`:  
 Settings for Haystack. (Default: ```false```)
 

docs/content/reference/static-configuration/file.toml

@@ -233,6 +233,10 @@
     parentIDHeaderName = "foobar"
     spanIDHeaderName = "foobar"
     baggagePrefixHeaderName = "foobar"
+  [tracing.elastic]
+    serverURL = "foobar"
+    secretToken = "foobar"
+    serviceEnvironment = "foobar"
 
 [hostResolver]
   cnameFlattening = true

docs/content/reference/static-configuration/file.yaml

@@ -238,6 +238,10 @@ tracing:
     parentIDHeaderName: foobar
     spanIDHeaderName: foobar
     baggagePrefixHeaderName: foobar
+  elastic:
+    serverURL: foobar
+    secretToken: foobar
+    serviceEnvironment: foobar
 hostResolver:
   cnameFlattening: true
   resolvConfig: foobar

docs/mkdocs.yml

@@ -143,6 +143,7 @@ nav:
           - 'Datadog': 'observability/tracing/datadog.md'
           - 'Instana': 'observability/tracing/instana.md'
           - 'Haystack': 'observability/tracing/haystack.md'
+          - 'Elastic': 'observability/tracing/elastic.md'
   - 'User Guides':
       - 'Kubernetes and Let''s Encrypt': 'user-guides/crd-acme/index.md'
       - 'gRPC Examples': 'user-guides/grpc.md'

go.mod

@@ -87,6 +87,8 @@ require (
 	github.com/vdemeester/shakers v0.1.0
 	github.com/vulcand/oxy v1.0.0
 	github.com/vulcand/predicate v1.1.0
+	go.elastic.co/apm v1.6.0
+	go.elastic.co/apm/module/apmot v1.6.0
 	golang.org/x/net v0.0.0-20190930134127-c5a3c61f89f3
 	golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a // indirect
 	golang.org/x/time v0.0.0-20190921001708-c4c64cad1fd0

go.sum

@@ -77,6 +77,8 @@ github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmV
 github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 h1:EFSB7Zo9Eg91v7MJPVsifUysc/wPdN+NOnVe6bWbdBM=
 github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878/go.mod h1:3AMJUQhVx52RsWOnlkpikZr01T/yAVN2gn0861vByNg=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI=
+github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/aws/aws-sdk-go v1.16.23/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.23.0 h1:ilfJN/vJtFo1XDFxB2YMBYGeOvGZl6Qow17oyD4+Z9A=
 github.com/aws/aws-sdk-go v1.23.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
@@ -172,6 +174,10 @@ github.com/eapache/queue v1.1.0 h1:YOEu7KNc61ntiQlcEeUIoDTJ2o8mQznoNvUhiigpIqc=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
 github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385 h1:clC1lXBpe2kTj2VHdaIu9ajZQe4kcEY9j0NsnDDBZ3o=
 github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385/go.mod h1:0vRUJqYpeSZifjYj7uP3BG/gKcuzL9xWVV/Y+cK33KM=
+github.com/elastic/go-sysinfo v1.0.1 h1:lzGPX2sIXaETeMXitXL2XZU8K4B7k7JBhIKWxdOdUt8=
+github.com/elastic/go-sysinfo v1.0.1/go.mod h1:O/D5m1VpYLwGjCYzEt63g3Z1uO3jXfwyzzjiW90t8cY=
+github.com/elastic/go-windows v1.0.0 h1:qLURgZFkkrYyTTkvYpsZIgf83AUsdIHfvlJaqaZ7aSY=
+github.com/elastic/go-windows v1.0.0/go.mod h1:TsU0Nrp7/y3+VwE82FoZF8gC/XFg/Elz6CcloAxnPgU=
 github.com/elazarl/go-bindata-assetfs v1.0.0 h1:G/bYguwHIzWq9ZoyUQqrjTmJbbYn3j3CKKpKinvZLFk=
 github.com/elazarl/go-bindata-assetfs v1.0.0/go.mod h1:v+YaWX3bdea5J/mo8dSETolEo7R71Vk1u8bnjau5yw4=
 github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc=
@@ -240,6 +246,8 @@ github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-github/v28 v28.0.0 h1:+UjHI4+1W/vsXR4jJBWt0ZA74XHbvt5yBAvsf1M3bgM=
 github.com/google/go-github/v28 v28.0.0/go.mod h1:+5GboIspo7F0NG2qsvfYh7en6F3EK37uyqv+c35AR3s=
 github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
@@ -335,8 +343,11 @@ github.com/instana/go-sensor v1.4.17-0.20190515112224-78c14625025a h1:S3CSPEIeIu
 github.com/instana/go-sensor v1.4.17-0.20190515112224-78c14625025a/go.mod h1:P1ynE0u78bUBZ2GkWewRpAO1/w1oW9CKDozeueH6QSg=
 github.com/jcmturner/gofork v0.0.0-20190328161633-dc7c13fece03 h1:FUwcHNlEqkqLjLBdCp5PRlCFijNjvcYANOZXzCfXwCM=
 github.com/jcmturner/gofork v0.0.0-20190328161633-dc7c13fece03/go.mod h1:MK8+TM0La+2rjBD4jE12Kj1pCCxK7d2LK/UM3ncEo0o=
+github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af h1:pmfjZENx5imkbgOkpRUYLnmbU7UEFbjtDA2hxJ1ichM=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
+github.com/joeshaw/multierror v0.0.0-20140124173710-69b34d4ec901 h1:rp+c0RAYOWj8l6qbCUTSiRLG/iKnW3K3/QfPPuSsBt4=
+github.com/joeshaw/multierror v0.0.0-20140124173710-69b34d4ec901/go.mod h1:Z86h9688Y0wesXCyonoVr47MasHilkuLMqGhRZ4Hpak=
 github.com/jonboulle/clockwork v0.1.0 h1:VKV+ZcuP6l3yW9doeqz6ziZGgcynBVQO+obU0+0hcPo=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
@@ -503,6 +514,7 @@ github.com/prometheus/common v0.6.0/go.mod h1:eBmuwkDJBwy6iBfxCBob6t6dR6ENT/y+J+
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20190117184657-bf6a532e95b1/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
+github.com/prometheus/procfs v0.0.0-20190425082905-87a4384529e0/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.3 h1:CTwfnzjQ+8dS6MhHHu4YswVAD99sL2wjPqP+VkURmKE=
 github.com/prometheus/procfs v0.0.3/go.mod h1:4A/X28fw3Fc593LaREMrKMqOKvUAntwMDaekg4FpcdQ=
@@ -516,6 +528,8 @@ github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb
 github.com/sacloud/libsacloud v1.26.1 h1:td3Kd7lvpSAxxHEVpnaZ9goHmmhi0D/RfP0Rqqf/kek=
 github.com/sacloud/libsacloud v1.26.1/go.mod h1:79ZwATmHLIFZIMd7sxA3LwzVy/B77uj3LDoToVTxDoQ=
 github.com/samuel/go-zookeeper v0.0.0-20180130194729-c4fab1ac1bec/go.mod h1:gi+0XIa01GRL2eRQVjQkKGqKF3SF9vZR/HnPullcV2E=
+github.com/santhosh-tekuri/jsonschema v1.2.4 h1:hNhW8e7t+H1vgY+1QeEQpveR6D4+OwKPXCfD2aieJis=
+github.com/santhosh-tekuri/jsonschema v1.2.4/go.mod h1:TEAUOeZSmIxTTuHatJzrvARHiuO9LYd+cIxzgEHCQI4=
 github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529 h1:nn5Wsu0esKSJiIVhscUtVbo7ada43DJhG55ua/hjS5I=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
@@ -580,6 +594,14 @@ github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:
 github.com/xeipuuv/gojsonschema v1.1.0 h1:ngVtJC9TY/lg0AA/1k48FYhBrhRoFlEmWzsehpNAaZg=
 github.com/xeipuuv/gojsonschema v1.1.0/go.mod h1:5yf86TLmAcydyeJq5YvxkGPE2fm/u4myDekKRoLuqhs=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
+go.elastic.co/apm v1.6.0 h1:RzyNj9Qx2iXh4A8DIg/aMUdtwGFNw3R8sKO3/Hf4pqk=
+go.elastic.co/apm v1.6.0/go.mod h1:/VByR6FBtuNu1YnPHz7Gri7YiIqAoFBGVp+2xkSE8tI=
+go.elastic.co/apm/module/apmhttp v1.6.0 h1:Y67VwDNnUyq4akeiem8Wtpb222RbZCRfY3FBI0swoJk=
+go.elastic.co/apm/module/apmhttp v1.6.0/go.mod h1:pf6GS5vDxdrSF0Qy6wESRBZCRZqATSZpr658ehD5QA4=
+go.elastic.co/apm/module/apmot v1.6.0 h1:3Tjwu25SfB2Bq+UsO8JOKYOuMzUu4s8/fS8BGkliocg=
+go.elastic.co/apm/module/apmot v1.6.0/go.mod h1:JIGFfrixcGjp8oD22PTTCvdNMfp+O+lOb5Hw4MtqxQ4=
+go.elastic.co/fastjson v1.0.0 h1:ooXV/ABvf+tBul26jcVViPT3sBir0PvXgibYB1IQQzg=
+go.elastic.co/fastjson v1.0.0/go.mod h1:PmeUOMMtLHQr9ZS9J9owrAVg0FkaZDRZJEFTTGHtchs=
 go.etcd.io/bbolt v1.3.1-etcd.8/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/etcd v3.3.13+incompatible/go.mod h1:yaeTdrJi5lOmYerz05bd8+V7KubZs8YSFZfzsF9A6aI=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
@@ -661,8 +683,10 @@ golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190425145619-16072639606e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b h1:ag/x1USPSsqHud38I9BAC88qdNLDHHtQ4mlgQIZPPNA=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a h1:aYOabOQFp6Vj6W1F80affTUvO9UxmJRx8K0gsfABByQ=
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -764,6 +788,8 @@ honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWh
 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=
+howett.net/plist v0.0.0-20181124034731-591f970eefbb h1:jhnBjNi9UFpfpl8YZhA9CrOqpnJdvzuiHsl/dnxl11M=
+howett.net/plist v0.0.0-20181124034731-591f970eefbb/go.mod h1:vMygbs4qMhSZSc4lCUl2OEE+rDiIIJAIdR4m7MiMcm0=
 k8s.io/api v0.0.0-20190718183219-b59d8169aab5 h1:X3LHYU4fwu75lvvWypbppCKuhqg1KrvcZ1lLaAgmE/g=
 k8s.io/api v0.0.0-20190718183219-b59d8169aab5/go.mod h1:TBhBqb1AWbBQbW3XRusr7n7E4v2+5ZY8r8sAMnyFC5A=
 k8s.io/apimachinery v0.0.0-20190612205821-1799e75a0719 h1:uV4S5IB5g4Nvi+TBVNf3e9L4wrirlwYJ6w88jUQxTUw=

pkg/config/static/static_config.go

@@ -19,6 +19,7 @@ import (
 	"github.com/containous/traefik/v2/pkg/provider/rest"
 	"github.com/containous/traefik/v2/pkg/tls"
 	"github.com/containous/traefik/v2/pkg/tracing/datadog"
+	"github.com/containous/traefik/v2/pkg/tracing/elastic"
 	"github.com/containous/traefik/v2/pkg/tracing/haystack"
 	"github.com/containous/traefik/v2/pkg/tracing/instana"
 	"github.com/containous/traefik/v2/pkg/tracing/jaeger"
@@ -144,6 +145,7 @@ type Tracing struct {
 	Datadog       *datadog.Config  `description:"Settings for Datadog." json:"datadog,omitempty" toml:"datadog,omitempty" yaml:"datadog,omitempty" export:"true" label:"allowEmpty"`
 	Instana       *instana.Config  `description:"Settings for Instana." json:"instana,omitempty" toml:"instana,omitempty" yaml:"instana,omitempty" export:"true" label:"allowEmpty"`
 	Haystack      *haystack.Config `description:"Settings for Haystack." json:"haystack,omitempty" toml:"haystack,omitempty" yaml:"haystack,omitempty" export:"true" label:"allowEmpty"`
+	Elastic       *elastic.Config  `description:"Settings for Elastic." json:"elastic,omitempty" toml:"elastic,omitempty" yaml:"elastic,omitempty" export:"true" label:"allowEmpty"`
 }
 
 // SetDefaults sets the default values.

pkg/server/middleware/chainbuilder.go

@@ -108,6 +108,14 @@ func setupTracing(conf *static.Tracing) *tracing.Tracing {
 		}
 	}
 
+	if conf.Elastic != nil {
+		if backend != nil {
+			log.WithoutContext().Error("Multiple tracing backend are not supported: cannot create Elastic backend.")
+		} else {
+			backend = conf.Elastic
+		}
+	}
+
 	if backend == nil {
 		log.WithoutContext().Debug("Could not initialize tracing, using Jaeger by default")
 		defaultBackend := &jaeger.Config{}

pkg/tracing/elastic/elastic.go

@@ -0,0 +1,64 @@
+package elastic
+
+import (
+	"io"
+	"net/url"
+
+	"github.com/containous/traefik/v2/pkg/log"
+	"github.com/containous/traefik/v2/pkg/version"
+	"github.com/opentracing/opentracing-go"
+	"go.elastic.co/apm"
+	"go.elastic.co/apm/module/apmot"
+	"go.elastic.co/apm/transport"
+)
+
+// Name sets the name of this tracer.
+const Name = "elastic"
+
+// Config provides configuration settings for a elastic.co tracer.
+type Config struct {
+	ServerURL          string `description:"Set the URL of the Elastic APM server." json:"serverURL,omitempty" toml:"serverURL,omitempty" yaml:"serverURL,omitempty"`
+	SecretToken        string `description:"Set the token used to connect to Elastic APM Server." json:"secretToken,omitempty" toml:"secretToken,omitempty" yaml:"secretToken,omitempty"`
+	ServiceEnvironment string `description:"Set the name of the environment Traefik is deployed in, e.g. 'production' or 'staging'." json:"serviceEnvironment,omitempty" toml:"serviceEnvironment,omitempty" yaml:"serviceEnvironment,omitempty"`
+}
+
+// Setup sets up the tracer.
+func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
+	// Create default transport.
+	tr, err := transport.NewHTTPTransport()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if c.ServerURL != "" {
+		serverURL, err := url.Parse(c.ServerURL)
+		if err != nil {
+			return nil, nil, err
+		}
+		tr.SetServerURL(serverURL)
+	}
+
+	if c.SecretToken != "" {
+		tr.SetSecretToken(c.SecretToken)
+	}
+
+	tracer, err := apm.NewTracerOptions(apm.TracerOptions{
+		ServiceName:        serviceName,
+		ServiceVersion:     version.Version,
+		ServiceEnvironment: c.ServiceEnvironment,
+		Transport:          tr,
+	})
+	if err != nil {
+		return nil, nil, err
+	}
+
+	tracer.SetLogger(log.WithoutContext())
+	otTracer := apmot.New(apmot.WithTracer(tracer))
+
+	// Without this, child spans are getting the NOOP tracer
+	opentracing.SetGlobalTracer(otTracer)
+
+	log.WithoutContext().Debug("Elastic tracer configured")
+
+	return otTracer, nil, nil
+}