mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-09-20 07:27:25 +02:00
fdb58b0be2
* 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
108 lines
2.5 KiB
Go
108 lines
2.5 KiB
Go
package sinks
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"time"
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cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
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lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
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influx "github.com/influxdata/line-protocol"
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nats "github.com/nats-io/nats.go"
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)
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type NatsSinkConfig struct {
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defaultSinkConfig
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Host string `json:"host,omitempty"`
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Port string `json:"port,omitempty"`
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Database string `json:"database,omitempty"`
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User string `json:"user,omitempty"`
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Password string `json:"password,omitempty"`
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}
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type NatsSink struct {
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sink
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client *nats.Conn
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encoder *influx.Encoder
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buffer *bytes.Buffer
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config NatsSinkConfig
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}
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func (s *NatsSink) connect() error {
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var err error
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var uinfo nats.Option = nil
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var nc *nats.Conn
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if len(s.config.User) > 0 && len(s.config.Password) > 0 {
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uinfo = nats.UserInfo(s.config.User, s.config.Password)
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}
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uri := fmt.Sprintf("nats://%s:%s", s.config.Host, s.config.Port)
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cclog.ComponentDebug(s.name, "Connect to", uri)
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s.client = nil
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if uinfo != nil {
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nc, err = nats.Connect(uri, uinfo)
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} else {
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nc, err = nats.Connect(uri)
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}
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if err != nil {
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cclog.ComponentError(s.name, "Connect to", uri, "failed:", err.Error())
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return err
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}
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s.client = nc
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return nil
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}
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func (s *NatsSink) Init(config json.RawMessage) error {
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s.name = "NatsSink"
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if len(config) > 0 {
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err := json.Unmarshal(config, &s.config)
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if err != nil {
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cclog.ComponentError(s.name, "Error reading config for", s.name, ":", err.Error())
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return err
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}
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}
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if len(s.config.Host) == 0 ||
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len(s.config.Port) == 0 ||
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len(s.config.Database) == 0 {
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return errors.New("not all configuration variables set required by NatsSink")
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}
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// Setup Influx line protocol
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s.buffer = &bytes.Buffer{}
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s.buffer.Grow(1025)
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s.encoder = influx.NewEncoder(s.buffer)
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s.encoder.SetPrecision(time.Second)
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s.encoder.SetMaxLineBytes(1024)
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// Setup infos for connection
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return s.connect()
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}
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func (s *NatsSink) Write(point lp.CCMetric) error {
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if s.client != nil {
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_, err := s.encoder.Encode(point)
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if err != nil {
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cclog.ComponentError(s.name, "Write:", err.Error())
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return err
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}
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}
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return nil
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}
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func (s *NatsSink) Flush() error {
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if s.client != nil {
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if err := s.client.Publish(s.config.Database, s.buffer.Bytes()); err != nil {
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cclog.ComponentError(s.name, "Flush:", err.Error())
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return err
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}
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s.buffer.Reset()
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}
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return nil
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}
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func (s *NatsSink) Close() {
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if s.client != nil {
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cclog.ComponentDebug(s.name, "Close")
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s.client.Close()
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}
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}
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