/
query.go
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/
query.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package ui
import (
"html/template"
"net/http"
"os"
"path"
"sort"
"strings"
"time"
"github.com/go-kit/kit/log"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/model"
"github.com/prometheus/common/route"
"github.com/prometheus/common/version"
"github.com/thanos-io/thanos/pkg/component"
extpromhttp "github.com/thanos-io/thanos/pkg/extprom/http"
"github.com/thanos-io/thanos/pkg/query"
)
type Query struct {
*BaseUI
storeSet *query.StoreSet
flagsMap map[string]string
cwd string
birth time.Time
reg prometheus.Registerer
now func() model.Time
}
type thanosVersion struct {
Version string `json:"version"`
Revision string `json:"revision"`
Branch string `json:"branch"`
BuildUser string `json:"buildUser"`
BuildDate string `json:"buildDate"`
GoVersion string `json:"goVersion"`
}
func NewQueryUI(logger log.Logger, reg prometheus.Registerer, storeSet *query.StoreSet, flagsMap map[string]string) *Query {
cwd, err := os.Getwd()
if err != nil {
cwd = "<error retrieving current working directory>"
}
return &Query{
BaseUI: NewBaseUI(logger, "query_menu.html", queryTmplFuncs()),
storeSet: storeSet,
flagsMap: flagsMap,
cwd: cwd,
birth: time.Now(),
reg: reg,
now: model.Now,
}
}
func queryTmplFuncs() template.FuncMap {
return template.FuncMap{
"since": func(t time.Time) time.Duration {
return time.Since(t) / time.Millisecond * time.Millisecond
},
"formatTimestamp": func(timestamp int64) string {
return time.Unix(timestamp/1000, 0).Format(time.RFC3339)
},
"title": strings.Title,
}
}
// Register registers new GET routes for subpages and retirects from / to /graph.
func (q *Query) Register(r *route.Router, ins extpromhttp.InstrumentationMiddleware) {
instrf := func(name string, next func(w http.ResponseWriter, r *http.Request)) http.HandlerFunc {
return ins.NewHandler(name, http.HandlerFunc(next))
}
r.Get("/", instrf("root", q.root))
r.Get("/graph", instrf("graph", q.graph))
r.Get("/stores", instrf("stores", q.stores))
r.Get("/status", instrf("status", q.status))
r.Get("/static/*filepath", instrf("static", q.serveStaticAsset))
// TODO(bplotka): Consider adding more Thanos related data e.g:
// - What store nodes we see currently.
// - What sidecars we see currently.
}
// Root redirects "/" requests to "/graph", taking into account the path prefix value.
func (q *Query) root(w http.ResponseWriter, r *http.Request) {
prefix := GetWebPrefix(q.logger, q.flagsMap, r)
http.Redirect(w, r, path.Join(prefix, "/graph"), http.StatusFound)
}
func (q *Query) graph(w http.ResponseWriter, r *http.Request) {
prefix := GetWebPrefix(q.logger, q.flagsMap, r)
q.executeTemplate(w, "graph.html", prefix, nil)
}
func (q *Query) status(w http.ResponseWriter, r *http.Request) {
prefix := GetWebPrefix(q.logger, q.flagsMap, r)
q.executeTemplate(w, "status.html", prefix, struct {
Birth time.Time
CWD string
Version thanosVersion
}{
Birth: q.birth,
CWD: q.cwd,
Version: thanosVersion{
Version: version.Version,
Revision: version.Revision,
Branch: version.Branch,
BuildUser: version.BuildUser,
BuildDate: version.BuildDate,
GoVersion: version.GoVersion,
},
})
}
func (q *Query) stores(w http.ResponseWriter, r *http.Request) {
prefix := GetWebPrefix(q.logger, q.flagsMap, r)
statuses := make(map[component.StoreAPI][]query.StoreStatus)
for _, status := range q.storeSet.GetStoreStatus() {
statuses[status.StoreType] = append(statuses[status.StoreType], status)
}
sources := make([]component.StoreAPI, 0, len(statuses))
for k := range statuses {
sources = append(sources, k)
}
sort.Slice(sources, func(i int, j int) bool {
if sources[i] == nil {
return false
}
if sources[j] == nil {
return true
}
return sources[i].String() < sources[j].String()
})
q.executeTemplate(w, "stores.html", prefix, struct {
Stores map[component.StoreAPI][]query.StoreStatus
Sources []component.StoreAPI
}{
Stores: statuses,
Sources: sources,
})
}