Sink specific configuration maps (#25)

* Use sink-specific configurations to have more flexibility. Adjust sample sink configuration files

* Add documentation

* Add links to individual sink readmes

* Fix link in README

* HTTPS for HttpSink

* If no CPU die id available, use the socket id instead

sinks/httpSink.go

@@ -2,6 +2,7 @@ package sinks
 
 import (
 	"bytes"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
@@ -11,28 +12,44 @@ import (
 	influx "github.com/influxdata/line-protocol"
 )
 
+type HttpSinkConfig struct {
+	defaultSinkConfig
+	Host     string `json:"host,omitempty"`
+	Port     string `json:"port,omitempty"`
+	Database string `json:"database,omitempty"`
+	JWT      string `json:"jwt,omitempty"`
+	SSL      bool   `json:"ssl,omitempty"`
+}
+
 type HttpSink struct {
 	sink
 	client   *http.Client
 	url, jwt string
 	encoder  *influx.Encoder
 	buffer   *bytes.Buffer
+	config   HttpSinkConfig
 }
 
-func (s *HttpSink) Init(config sinkConfig) error {
+func (s *HttpSink) Init(config json.RawMessage) error {
 	s.name = "HttpSink"
-	if len(config.Host) == 0 || len(config.Port) == 0 || len(config.Database) == 0 {
+	s.config.SSL = false
+	if len(config) > 0 {
+		err := json.Unmarshal(config, &s.config)
+		if err != nil {
+			return err
+		}
+	}
+	if len(s.config.Host) == 0 || len(s.config.Port) == 0 || len(s.config.Database) == 0 {
 		return errors.New("`host`, `port` and `database` config options required for TCP sink")
 	}
 
 	s.client = &http.Client{}
 	proto := "http"
-	if config.SSL {
+	if s.config.SSL {
 		proto = "https"
 	}
-	s.url = fmt.Sprintf("%s://%s:%s/%s", proto, config.Host, config.Port, config.Database)
-	s.port = config.Port
-	s.jwt = config.Password
+	s.url = fmt.Sprintf("%s://%s:%s/%s", proto, s.config.Host, s.config.Port, s.config.Database)
+	s.jwt = s.config.JWT
 	s.buffer = &bytes.Buffer{}
 	s.encoder = influx.NewEncoder(s.buffer)
 	s.encoder.SetPrecision(time.Second)