support thanos tracing

Signed-off-by: yeya24 <yb532204897@gmail.com>

Documentation/api.md

@@ -647,6 +647,7 @@ ThanosSpec defines parameters for a Prometheus server within a Thanos deployment
 | resources | Resources defines the resource requirements for the Thanos sidecar. If not provided, no requests/limits will be set | [v1.ResourceRequirements](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/#resourcerequirements-v1-core) | false |
 | objectStorageConfig | ObjectStorageConfig configures object storage in Thanos. | *[v1.SecretKeySelector](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/#secretkeyselector-v1-core) | false |
 | listenLocal | ListenLocal makes the Thanos sidecar listen on loopback, so that it does not bind against the Pod IP. | bool | false |
+| tracingConfig | TracingConfig configures tracing in Thanos. This is an experimental feature, it may change in any upcoming release in a breaking way. | *[v1.SecretKeySelector](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/#secretkeyselector-v1-core) | false |
 
 [Back to TOC](#table-of-contents)
 
@@ -700,6 +701,7 @@ ThanosRulerSpec is a specification of the desired behavior of the ThanosRuler. M
 | portName | Port name used for the pods and governing service. This defaults to web | string | false |
 | evaluationInterval | Interval between consecutive evaluations. | string | false |
 | retention | Time duration ThanosRuler shall retain data for. Default is '24h', and must match the regular expression `[0-9]+(ms\|s\|m\|h\|d\|w\|y)` (milliseconds seconds minutes hours days weeks years). | string | false |
+| tracingConfig | TracingConfig configures tracing in Thanos. This is an experimental feature, it may change in any upcoming release in a breaking way. | *[v1.SecretKeySelector](https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/#secretkeyselector-v1-core) | false |
 
 [Back to TOC](#table-of-contents)
 

example/prometheus-operator-crd/monitoring.coreos.com_prometheuses.yaml

@@ -4529,6 +4529,25 @@ spec:
                     Defaults to the value of `version`. Version is ignored if Tag
                     is set.
                   type: string
+                tracingConfig:
+                  description: TracingConfig configures tracing in Thanos. This is
+                    an experimental feature, it may change in any upcoming release
+                    in a breaking way.
+                  properties:
+                    key:
+                      description: The key of the secret to select from.  Must be
+                        a valid secret key.
+                      type: string
+                    name:
+                      description: 'Name of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names
+                        TODO: Add other useful fields. apiVersion, kind, uid?'
+                      type: string
+                    optional:
+                      description: Specify whether the Secret or its key must be defined
+                      type: boolean
+                  required:
+                  - key
+                  type: object
                 version:
                   description: Version describes the version of Thanos to use.
                   type: string

example/prometheus-operator-crd/monitoring.coreos.com_thanosrulers.yaml

@@ -466,6 +466,25 @@ spec:
                       type: object
                   type: object
               type: object
+            tracingConfig:
+              description: TracingConfig configures tracing in Thanos. This is an
+                experimental feature, it may change in any upcoming release in a breaking
+                way.
+              properties:
+                key:
+                  description: The key of the secret to select from.  Must be a valid
+                    secret key.
+                  type: string
+                name:
+                  description: 'Name of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names
+                    TODO: Add other useful fields. apiVersion, kind, uid?'
+                  type: string
+                optional:
+                  description: Specify whether the Secret or its key must be defined
+                  type: boolean
+              required:
+              - key
+              type: object
             volumes:
               description: Volumes allows configuration of additional volumes on the
                 output StatefulSet definition. Volumes specified will be appended

pkg/apis/monitoring/v1/thanos_types.go

@@ -117,6 +117,8 @@ type ThanosRulerSpec struct {
 	// Time duration ThanosRuler shall retain data for. Default is '24h',
 	// and must match the regular expression `[0-9]+(ms|s|m|h|d|w|y)` (milliseconds seconds minutes hours days weeks years).
 	Retention string `json:"retention,omitempty"`
+	// TracingConfig configures tracing in Thanos. This is an experimental feature, it may change in any upcoming release in a breaking way.
+	TracingConfig *v1.SecretKeySelector `json:"tracingConfig,omitempty"`
 }
 
 // ThanosRulerStatus is the most recent observed status of the ThanosRuler. Read-only. Not

pkg/apis/monitoring/v1/types.go

@@ -394,6 +394,8 @@ type ThanosSpec struct {
 	// ListenLocal makes the Thanos sidecar listen on loopback, so that it
 	// does not bind against the Pod IP.
 	ListenLocal bool `json:"listenLocal,omitempty"`
+	// TracingConfig configures tracing in Thanos. This is an experimental feature, it may change in any upcoming release in a breaking way.
+	TracingConfig *v1.SecretKeySelector `json:"tracingConfig,omitempty"`
 }
 
 // RemoteWriteSpec defines the remote_write configuration for prometheus.

pkg/apis/monitoring/v1/zz_generated.deepcopy.go

@@ -1410,6 +1410,11 @@ func (in *ThanosRulerSpec) DeepCopyInto(out *ThanosRulerSpec) {
 		*out = new(metav1.LabelSelector)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.TracingConfig != nil {
+		in, out := &in.TracingConfig, &out.TracingConfig
+		*out = new(corev1.SecretKeySelector)
+		(*in).DeepCopyInto(*out)
+	}
 }
 
 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ThanosRulerSpec.
@@ -1471,6 +1476,11 @@ func (in *ThanosSpec) DeepCopyInto(out *ThanosSpec) {
 		*out = new(corev1.SecretKeySelector)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.TracingConfig != nil {
+		in, out := &in.TracingConfig, &out.TracingConfig
+		*out = new(corev1.SecretKeySelector)
+		(*in).DeepCopyInto(*out)
+	}
 }
 
 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ThanosSpec.

pkg/prometheus/statefulset.go

@@ -831,6 +831,16 @@ func makeStatefulSetSpec(p monitoringv1.Prometheus, c *Config, ruleConfigMapName
 			disableCompaction = true
 		}
 
+		if p.Spec.Thanos.TracingConfig != nil {
+			container.Args = append(container.Args, "--tracing.config=$(TRACING_CONFIG)")
+			container.Env = append(container.Env, v1.EnvVar{
+				Name: "TRACING_CONFIG",
+				ValueFrom: &v1.EnvVarSource{
+					SecretKeyRef: p.Spec.Thanos.TracingConfig,
+				},
+			})
+		}
+
 		if p.Spec.LogLevel != "" {
 			container.Args = append(container.Args, fmt.Sprintf("--log.level=%s", p.Spec.LogLevel))
 		}

pkg/thanos/statefulset.go

@@ -198,6 +198,16 @@ func makeStatefulSetSpec(tr *monitoringv1.ThanosRuler, config Config, ruleConfig
 		})
 	}
 
+	if tr.Spec.TracingConfig != nil {
+		trCLIArgs = append(trCLIArgs, "--tracing.config=$(TRACING_CONFIG)")
+		trEnvVars = append(trEnvVars, v1.EnvVar{
+			Name: "TRACING_CONFIG",
+			ValueFrom: &v1.EnvVarSource{
+				SecretKeyRef: tr.Spec.TracingConfig,
+			},
+		})
+	}
+
 	localReloadURL := &url.URL{
 		Scheme: "http",
 		Host:   config.LocalHost + ":10902",