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/metricSink.go

@@ -1,36 +1,23 @@
 package sinks
 
 import (
-	//	"time"
+	"encoding/json"
+
 	lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
 )
 
-type sinkConfig struct {
-	Type         string `json:"type"`
-	Host         string `json:"host,omitempty"`
-	Port         string `json:"port,omitempty"`
-	Database     string `json:"database,omitempty"`
-	User         string `json:"user,omitempty"`
-	Password     string `json:"password,omitempty"`
-	Organization string `json:"organization,omitempty"`
-	SSL          bool   `json:"ssl,omitempty"`
-	MetaAsTags   bool   `json:"meta_as_tags,omitempty"`
+type defaultSinkConfig struct {
+	MetaAsTags bool   `json:"meta_as_tags,omitempty"`
+	Type       string `json:"type"`
 }
 
 type sink struct {
-	host         string
-	port         string
-	user         string
-	password     string
-	database     string
-	organization string
-	ssl          bool
 	meta_as_tags bool
 	name         string
 }
 
 type Sink interface {
-	Init(config sinkConfig) error
+	Init(config json.RawMessage) error
 	Write(point lp.CCMetric) error
 	Flush() error
 	Close()