cc-metric-collector/receivers/httpReceiver.go
Thomas Gruber be20f956c2
Add latest development to main branch (#89)
* InfiniBandCollector: Scale raw readings from octets to bytes

* Fix clock frequency coming from LikwidCollector and update docs

* Build DEB package for Ubuntu 20.04 for releases

* Fix memstat collector with numa_stats option

* Remove useless prints from MemstatCollector

* Replace ioutils with os and io (#87)

* Use lower case for error strings in RocmSmiCollector

* move maybe-usable-by-other-cc-components to pkg. Fix all files to use the new paths (#88)

* Add collector for monitoring the execution of cc-metric-collector itself (#81)

* Add collector to monitor execution of cc-metric-collector itself

* Register SelfCollector

* Fix import paths for moved packages
2022-10-10 12:23:51 +02:00

119 lines
2.7 KiB
Go

package receivers
import (
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"strings"
"sync"
cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
"github.com/gorilla/mux"
influx "github.com/influxdata/line-protocol"
)
const HTTP_RECEIVER_PORT = "8080"
type HttpReceiverConfig struct {
Type string `json:"type"`
Addr string `json:"address"`
Port string `json:"port"`
Path string `json:"path"`
}
type HttpReceiver struct {
receiver
handler *influx.MetricHandler
parser *influx.Parser
meta map[string]string
config HttpReceiverConfig
router *mux.Router
server *http.Server
wg sync.WaitGroup
}
func (r *HttpReceiver) Init(name string, config json.RawMessage) error {
r.name = fmt.Sprintf("HttpReceiver(%s)", name)
r.config.Port = HTTP_RECEIVER_PORT
if len(config) > 0 {
err := json.Unmarshal(config, &r.config)
if err != nil {
cclog.ComponentError(r.name, "Error reading config:", err.Error())
return err
}
}
if len(r.config.Port) == 0 {
return errors.New("not all configuration variables set required by HttpReceiver")
}
r.meta = map[string]string{"source": r.name}
p := r.config.Path
if !strings.HasPrefix(p, "/") {
p = "/" + p
}
uri := fmt.Sprintf("%s:%s%s", r.config.Addr, r.config.Port, p)
cclog.ComponentDebug(r.name, "INIT", uri)
r.handler = influx.NewMetricHandler()
r.parser = influx.NewParser(r.handler)
r.parser.SetTimeFunc(DefaultTime)
r.router = mux.NewRouter()
r.router.Path(p).HandlerFunc(r.ServerHttp)
r.server = &http.Server{Addr: uri, Handler: r.router}
return nil
}
func (r *HttpReceiver) Start() {
cclog.ComponentDebug(r.name, "START")
r.wg.Add(1)
go func() {
err := r.server.ListenAndServe()
if err != nil && err.Error() != "http: Server closed" {
cclog.ComponentError(r.name, err.Error())
}
r.wg.Done()
}()
}
func (r *HttpReceiver) ServerHttp(w http.ResponseWriter, req *http.Request) {
if req.Method != http.MethodPost {
http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
return
}
body, err := io.ReadAll(req.Body)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
metrics, err := r.parser.Parse(body)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
}
for _, m := range metrics {
y := lp.FromInfluxMetric(m)
for k, v := range r.meta {
y.AddMeta(k, v)
}
if r.sink != nil {
r.sink <- y
}
}
w.WriteHeader(http.StatusOK)
}
func (r *HttpReceiver) Close() {
r.server.Shutdown(context.Background())
}
func NewHttpReceiver(name string, config json.RawMessage) (Receiver, error) {
r := new(HttpReceiver)
err := r.Init(name, config)
return r, err
}