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config.go
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config.go
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package internal
import (
"fmt"
"strings"
"time"
"github.com/jaegertracing/jaeger/ports"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"go.uber.org/zap/zapcore"
)
type Config struct {
LogLevel string
ListenAddr string
InfluxdbAddr string
InfluxdbTLSDisable bool
InfluxdbTimeout time.Duration
InfluxdbBucket string
InfluxdbBucketArchive string
InfluxdbToken string
InfluxdbQueryMetadata map[string]string
}
func (c *Config) Init(command *cobra.Command) error {
viper.AutomaticEnv()
viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
for _, f := range []struct {
pointer interface{}
name string
defaultValue interface{}
usage string
}{
{
pointer: &c.LogLevel,
name: "log-level",
defaultValue: zapcore.InfoLevel.String(),
usage: "log level (zap)",
},
{
pointer: &c.ListenAddr,
name: "listen-addr",
defaultValue: fmt.Sprintf(":%d", ports.RemoteStorageGRPC),
usage: "Jaeger gRPC storage service (this process) host:port address",
},
{
pointer: &c.InfluxdbAddr,
name: "influxdb-addr",
usage: "InfluxDB service host:port",
},
{
pointer: &c.InfluxdbTLSDisable,
name: "influxdb-tls-disable",
usage: "Do not use TLS to connect to InfluxDB (mostly for development)",
},
{
pointer: &c.InfluxdbTimeout,
name: "influxdb-timeout",
defaultValue: 15 * time.Second,
usage: "InfluxDB query timeout",
},
{
pointer: &c.InfluxdbBucket,
name: "influxdb-bucket",
usage: "InfluxDB bucket name, containing traces, logs, metrics (query only)",
},
{
pointer: &c.InfluxdbBucketArchive,
name: "influxdb-bucket-archive",
usage: "InfluxDB bucket name, for archiving traces (optional; write and query permissions required)",
},
{
pointer: &c.InfluxdbToken,
name: "influxdb-token",
usage: "InfluxDB API access token",
},
{
pointer: &c.InfluxdbQueryMetadata,
name: "influxdb-query-metadata",
usage: `gRPC metadata sent with SQL queries ("foo=bar") (optional; specify zero to many times)`,
},
} {
switch v := f.pointer.(type) {
case *string:
var defaultValue string
if f.defaultValue != nil {
defaultValue = f.defaultValue.(string)
}
command.Flags().StringVar(v, f.name, defaultValue, f.usage)
if err := viper.BindPFlag(f.name, command.Flags().Lookup(f.name)); err != nil {
return err
}
*v = viper.GetString(f.name)
case *time.Duration:
var defaultValue time.Duration
if f.defaultValue != nil {
defaultValue = f.defaultValue.(time.Duration)
}
command.Flags().DurationVar(v, f.name, defaultValue, f.usage)
if err := viper.BindPFlag(f.name, command.Flags().Lookup(f.name)); err != nil {
return err
}
*v = viper.GetDuration(f.name)
case *bool:
var defaultValue bool
if f.defaultValue != nil {
defaultValue = f.defaultValue.(bool)
}
command.Flags().BoolVar(v, f.name, defaultValue, f.usage)
if err := viper.BindPFlag(f.name, command.Flags().Lookup(f.name)); err != nil {
return err
}
*v = viper.GetBool(f.name)
case *map[string]string:
var defaultValue map[string]string
if f.defaultValue != nil {
defaultValue = f.defaultValue.(map[string]string)
}
command.Flags().StringToStringVar(v, f.name, defaultValue, f.usage)
if err := viper.BindPFlag(f.name, command.Flags().Lookup(f.name)); err != nil {
return err
}
*v = viper.GetStringMapString(f.name)
default:
return fmt.Errorf("flag type %T not implemented", f.pointer)
}
}
return nil
}