traefik/pkg/api/handler_overview.go

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package api
import (
"encoding/json"
"net/http"
"reflect"
"github.com/containous/traefik/pkg/config/runtime"
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"github.com/containous/traefik/pkg/config/static"
"github.com/containous/traefik/pkg/log"
)
type schemeOverview struct {
Routers *section `json:"routers,omitempty"`
Services *section `json:"services,omitempty"`
Middlewares *section `json:"middlewares,omitempty"`
}
type section struct {
Total int `json:"total"`
Warnings int `json:"warnings"`
Errors int `json:"errors"`
}
type features struct {
Tracing string `json:"tracing"`
Metrics string `json:"metrics"`
AccessLog bool `json:"accessLog"`
// TODO add certificates resolvers
}
type overview struct {
HTTP schemeOverview `json:"http"`
TCP schemeOverview `json:"tcp"`
Features features `json:"features,omitempty"`
Providers []string `json:"providers,omitempty"`
}
func (h Handler) getOverview(rw http.ResponseWriter, request *http.Request) {
result := overview{
HTTP: schemeOverview{
Routers: getHTTPRouterSection(h.runtimeConfiguration.Routers),
Services: getHTTPServiceSection(h.runtimeConfiguration.Services),
Middlewares: getHTTPMiddlewareSection(h.runtimeConfiguration.Middlewares),
},
TCP: schemeOverview{
Routers: getTCPRouterSection(h.runtimeConfiguration.TCPRouters),
Services: getTCPServiceSection(h.runtimeConfiguration.TCPServices),
},
Features: getFeatures(h.staticConfig),
Providers: getProviders(h.staticConfig),
}
rw.Header().Set("Content-Type", "application/json")
err := json.NewEncoder(rw).Encode(result)
if err != nil {
log.FromContext(request.Context()).Error(err)
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
}
func getHTTPRouterSection(routers map[string]*runtime.RouterInfo) *section {
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var countErrors int
var countWarnings int
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for _, rt := range routers {
switch rt.Status {
case runtime.StatusDisabled:
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countErrors++
case runtime.StatusWarning:
countWarnings++
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}
}
return &section{
Total: len(routers),
Warnings: countWarnings,
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Errors: countErrors,
}
}
func getHTTPServiceSection(services map[string]*runtime.ServiceInfo) *section {
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var countErrors int
var countWarnings int
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for _, svc := range services {
switch svc.Status {
case runtime.StatusDisabled:
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countErrors++
case runtime.StatusWarning:
countWarnings++
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}
}
return &section{
Total: len(services),
Warnings: countWarnings,
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Errors: countErrors,
}
}
func getHTTPMiddlewareSection(middlewares map[string]*runtime.MiddlewareInfo) *section {
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var countErrors int
for _, md := range middlewares {
if md.Err != nil {
countErrors++
}
}
return &section{
Total: len(middlewares),
Warnings: 0,
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Errors: countErrors,
}
}
func getTCPRouterSection(routers map[string]*runtime.TCPRouterInfo) *section {
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var countErrors int
var countWarnings int
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for _, rt := range routers {
switch rt.Status {
case runtime.StatusDisabled:
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countErrors++
case runtime.StatusWarning:
countWarnings++
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}
}
return &section{
Total: len(routers),
Warnings: countWarnings,
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Errors: countErrors,
}
}
func getTCPServiceSection(services map[string]*runtime.TCPServiceInfo) *section {
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var countErrors int
var countWarnings int
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for _, svc := range services {
switch svc.Status {
case runtime.StatusDisabled:
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countErrors++
case runtime.StatusWarning:
countWarnings++
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}
}
return &section{
Total: len(services),
Warnings: countWarnings,
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Errors: countErrors,
}
}
func getProviders(conf static.Configuration) []string {
if conf.Providers == nil {
return nil
}
var providers []string
v := reflect.ValueOf(conf.Providers).Elem()
for i := 0; i < v.NumField(); i++ {
field := v.Field(i)
if field.Kind() == reflect.Ptr && field.Elem().Kind() == reflect.Struct {
if !field.IsNil() {
providers = append(providers, v.Type().Field(i).Name)
}
}
}
return providers
}
func getFeatures(conf static.Configuration) features {
return features{
Tracing: getTracing(conf),
Metrics: getMetrics(conf),
AccessLog: conf.AccessLog != nil,
}
}
func getMetrics(conf static.Configuration) string {
if conf.Metrics == nil {
return ""
}
v := reflect.ValueOf(conf.Metrics).Elem()
for i := 0; i < v.NumField(); i++ {
field := v.Field(i)
if field.Kind() == reflect.Ptr && field.Elem().Kind() == reflect.Struct {
if !field.IsNil() {
return v.Type().Field(i).Name
}
}
}
return ""
}
func getTracing(conf static.Configuration) string {
if conf.Tracing == nil {
return ""
}
v := reflect.ValueOf(conf.Tracing).Elem()
for i := 0; i < v.NumField(); i++ {
field := v.Field(i)
if field.Kind() == reflect.Ptr && field.Elem().Kind() == reflect.Struct {
if !field.IsNil() {
return v.Type().Field(i).Name
}
}
}
return ""
}