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influxdb.go
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influxdb.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package influxdb
import (
"errors"
"fmt"
"net/url"
"strconv"
"time"
"k8s.io/heapster/version"
influxdb "github.com/influxdata/influxdb/client"
)
type InfluxdbClient interface {
Write(influxdb.BatchPoints) (*influxdb.Response, error)
Query(influxdb.Query) (*influxdb.Response, error)
Ping() (time.Duration, string, error)
}
type InfluxdbConfig struct {
User string
Password string
Secure bool
Host string
DbName string
WithFields bool
InsecureSsl bool
RetentionPolicy string
ClusterName string
DisableCounterMetrics bool
Concurrency int
}
func NewClient(c InfluxdbConfig) (InfluxdbClient, error) {
url := &url.URL{
Scheme: "http",
Host: c.Host,
}
if c.Secure {
url.Scheme = "https"
}
iConfig := &influxdb.Config{
URL: *url,
Username: c.User,
Password: c.Password,
UserAgent: fmt.Sprintf("%v/%v", "heapster", version.HeapsterVersion),
UnsafeSsl: c.InsecureSsl,
}
client, err := influxdb.NewClient(*iConfig)
if err != nil {
return nil, err
}
if _, _, err := client.Ping(); err != nil {
return nil, fmt.Errorf("failed to ping InfluxDB server at %q - %v", c.Host, err)
}
return client, nil
}
func BuildConfig(uri *url.URL) (*InfluxdbConfig, error) {
config := InfluxdbConfig{
User: "root",
Password: "root",
Host: "localhost:8086",
DbName: "k8s",
Secure: false,
WithFields: false,
InsecureSsl: false,
RetentionPolicy: "0",
ClusterName: "default",
DisableCounterMetrics: false,
Concurrency: 1,
}
if len(uri.Host) > 0 {
config.Host = uri.Host
}
opts := uri.Query()
if len(opts["user"]) >= 1 {
config.User = opts["user"][0]
}
// TODO: use more secure way to pass the password.
if len(opts["pw"]) >= 1 {
config.Password = opts["pw"][0]
}
if len(opts["db"]) >= 1 {
config.DbName = opts["db"][0]
}
if len(opts["retention"]) >= 1 {
config.RetentionPolicy = opts["retention"][0]
}
if len(opts["withfields"]) >= 1 {
val, err := strconv.ParseBool(opts["withfields"][0])
if err != nil {
return nil, fmt.Errorf("failed to parse `withfields` flag - %v", err)
}
config.WithFields = val
}
if len(opts["secure"]) >= 1 {
val, err := strconv.ParseBool(opts["secure"][0])
if err != nil {
return nil, fmt.Errorf("failed to parse `secure` flag - %v", err)
}
config.Secure = val
}
if len(opts["insecuressl"]) >= 1 {
val, err := strconv.ParseBool(opts["insecuressl"][0])
if err != nil {
return nil, fmt.Errorf("failed to parse `insecuressl` flag - %v", err)
}
config.InsecureSsl = val
}
if len(opts["cluster_name"]) >= 1 {
config.ClusterName = opts["cluster_name"][0]
}
if len(opts["disable_counter_metrics"]) >= 1 {
val, err := strconv.ParseBool(opts["disable_counter_metrics"][0])
if err != nil {
return nil, fmt.Errorf("failed to parse `disable_counter_metrics` flag - %v", err)
}
config.DisableCounterMetrics = val
}
if len(opts["concurrency"]) >= 1 {
concurrency, err := strconv.Atoi(opts["concurrency"][0])
if err != nil {
return nil, fmt.Errorf("failed to parse `concurrency` flag - %v", err)
}
if concurrency <= 0 {
return nil, errors.New("`concurrency` flag can only be positive")
}
config.Concurrency = concurrency
}
return &config, nil
}