/
jaeger.go
259 lines (205 loc) · 6.72 KB
/
jaeger.go
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package jaeger
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
jaegerProto "github.com/kobsio/kobs/pkg/api/plugins/jaeger/proto"
pluginsProto "github.com/kobsio/kobs/pkg/api/plugins/plugins/proto"
"github.com/kobsio/kobs/pkg/api/plugins/plugins/shared"
"github.com/sirupsen/logrus"
"google.golang.org/grpc"
)
var (
log = logrus.WithFields(logrus.Fields{"package": "jaeger"})
)
type Config struct {
Name string `yaml:"name"`
Description string `yaml:"description"`
Address string `yaml:"address"`
Username string `yaml:"username"`
Password string `yaml:"password"`
Token string `yaml:"token"`
}
// ResponseDataServices is the structure of the response for a services request against the Jaeger API.
type ResponseDataServices struct {
Data []string `json:"data"`
}
// ResponseDataOperations is the structure of the response for a operations request against the Jaeger API.
type ResponseDataOperations struct {
Data []*jaegerProto.Operation `json:"data"`
}
// ResponseError is the structure for a failed Jaeger API request.
type ResponseError struct {
Errors []struct {
Code int `json:"code"`
Msg string `json:"msg"`
} `json:"errors"`
}
type Instance struct {
name string
address string
client *http.Client
}
// doRequest is a helper function to run a request against a Jaeger instance for the given path. It returns the body or
// if the request failed the error message.
func (i *Instance) doRequest(url string) ([]byte, error) {
req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("%s%s", i.address, url), nil)
if err != nil {
return nil, err
}
resp, err := i.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode >= 200 && resp.StatusCode < 300 {
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return body, nil
}
var res ResponseError
err = json.NewDecoder(resp.Body).Decode(&res)
if err != nil {
return nil, err
}
if len(res.Errors) > 0 {
return nil, fmt.Errorf(res.Errors[0].Msg)
}
return nil, fmt.Errorf("%v", res)
}
type Jaeger struct {
jaegerProto.UnimplementedJaegerServer
instances []*Instance
}
func (j *Jaeger) getInstace(name string) *Instance {
for _, i := range j.instances {
if i.name == name {
return i
}
}
return nil
}
func (j *Jaeger) GetServices(ctx context.Context, getServicesRequest *jaegerProto.GetServicesRequest) (*jaegerProto.GetServicesResponse, error) {
if getServicesRequest == nil {
return nil, fmt.Errorf("request data is missing")
}
instance := j.getInstace(getServicesRequest.Name)
if instance == nil {
return nil, fmt.Errorf("invalid name for Jaeger plugin")
}
log.Tracef("GetServices")
body, err := instance.doRequest("/api/services")
if err != nil {
return nil, err
}
var response ResponseDataServices
err = json.Unmarshal(body, &response)
if err != nil {
return nil, err
}
log.WithFields(logrus.Fields{"count": len(response.Data)}).Tracef("GetServices retrieved services")
return &jaegerProto.GetServicesResponse{
Services: response.Data,
}, nil
}
func (j *Jaeger) GetOperations(ctx context.Context, getOperationsRequest *jaegerProto.GetOperationsRequest) (*jaegerProto.GetOperationsResponse, error) {
if getOperationsRequest == nil {
return nil, fmt.Errorf("request data is missing")
}
instance := j.getInstace(getOperationsRequest.Name)
if instance == nil {
return nil, fmt.Errorf("invalid name for Jaeger plugin")
}
if getOperationsRequest.Service == "" {
return nil, fmt.Errorf("serivce is missing")
}
log.WithFields(logrus.Fields{"service": getOperationsRequest.Service}).Tracef("GetOperations")
body, err := instance.doRequest(fmt.Sprintf("/api/operations?service=%s", getOperationsRequest.Service))
if err != nil {
return nil, err
}
var response ResponseDataOperations
err = json.Unmarshal(body, &response)
if err != nil {
return nil, err
}
log.WithFields(logrus.Fields{"count": len(response.Data)}).Tracef("GetOperations retrieved operations")
return &jaegerProto.GetOperationsResponse{
Operations: response.Data,
}, nil
}
func (j *Jaeger) GetTraces(ctx context.Context, getTracesRequest *jaegerProto.GetTracesRequest) (*jaegerProto.GetTracesResponse, error) {
if getTracesRequest == nil {
return nil, fmt.Errorf("request data is missing")
}
instance := j.getInstace(getTracesRequest.Name)
if instance == nil {
return nil, fmt.Errorf("invalid name for Jaeger plugin")
}
log.WithFields(logrus.Fields{"service": getTracesRequest.Service, "operation": getTracesRequest.Operation, "tags": getTracesRequest.Tags}).Tracef("GetTraces")
body, err := instance.doRequest(fmt.Sprintf("/api/traces?end=%d&limit=%s&lookback=custom&maxDuration=%s&minDuration=%s&operation=%s&service=%s&start=%d&tags=%s", getTracesRequest.TimeEnd*1000000, getTracesRequest.Limit, getTracesRequest.MaxDuration, getTracesRequest.MinDuration, getTracesRequest.Operation, getTracesRequest.Service, getTracesRequest.TimeStart*1000000, getTracesRequest.Tags))
if err != nil {
return nil, err
}
return &jaegerProto.GetTracesResponse{
Traces: string(body),
}, nil
}
func (j *Jaeger) GetTrace(ctx context.Context, getTraceRequest *jaegerProto.GetTraceRequest) (*jaegerProto.GetTraceResponse, error) {
if getTraceRequest == nil {
return nil, fmt.Errorf("request data is missing")
}
instance := j.getInstace(getTraceRequest.Name)
if instance == nil {
return nil, fmt.Errorf("invalid name for Jaeger plugin")
}
log.WithFields(logrus.Fields{"traceID": getTraceRequest.TraceID}).Tracef("GetTrace")
body, err := instance.doRequest(fmt.Sprintf("/api/traces/%s", getTraceRequest.TraceID))
if err != nil {
return nil, err
}
return &jaegerProto.GetTraceResponse{
Traces: string(body),
}, nil
}
func Register(cfg []Config, grpcServer *grpc.Server) ([]*pluginsProto.PluginShort, error) {
log.Tracef("Register Jaeger Plugin.")
var pluginDetails []*pluginsProto.PluginShort
var instances []*Instance
for _, config := range cfg {
roundTripper := shared.DefaultRoundTripper
if config.Username != "" && config.Password != "" {
roundTripper = shared.BasicAuthTransport{
Transport: roundTripper,
Username: config.Username,
Password: config.Password,
}
}
if config.Token != "" {
roundTripper = shared.TokenAuthTransporter{
Transport: roundTripper,
Token: config.Token,
}
}
pluginDetails = append(pluginDetails, &pluginsProto.PluginShort{
Name: config.Name,
Description: config.Description,
Type: "jaeger",
})
instances = append(instances, &Instance{
name: config.Name,
address: config.Address,
client: &http.Client{
Transport: roundTripper,
},
})
}
jaegerProto.RegisterJaegerServer(grpcServer, &Jaeger{
instances: instances,
})
return pluginDetails, nil
}