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75 lines
2.0 KiB
75 lines
2.0 KiB
package trace
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import (
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"flag"
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"fmt"
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"os"
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"time"
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"github.com/pkg/errors"
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"github.com/go-kratos/kratos/pkg/conf/dsn"
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"github.com/go-kratos/kratos/pkg/conf/env"
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xtime "github.com/go-kratos/kratos/pkg/time"
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)
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var _traceDSN = "unixgram:///var/run/dapper-collect/dapper-collect.sock"
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func init() {
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if v := os.Getenv("TRACE"); v != "" {
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_traceDSN = v
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}
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flag.StringVar(&_traceDSN, "trace", _traceDSN, "trace report dsn, or use TRACE env.")
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}
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// Config config.
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type Config struct {
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// Report network e.g. unixgram, tcp, udp
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Network string `dsn:"network"`
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// For TCP and UDP networks, the addr has the form "host:port".
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// For Unix networks, the address must be a file system path.
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Addr string `dsn:"address"`
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// Report timeout
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Timeout xtime.Duration `dsn:"query.timeout,200ms"`
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// DisableSample
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DisableSample bool `dsn:"query.disable_sample"`
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// ProtocolVersion
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ProtocolVersion int32 `dsn:"query.protocol_version,1"`
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// Probability probability sampling
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Probability float32 `dsn:"-"`
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}
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func parseDSN(rawdsn string) (*Config, error) {
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d, err := dsn.Parse(rawdsn)
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if err != nil {
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return nil, errors.Wrapf(err, "trace: invalid dsn: %s", rawdsn)
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}
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cfg := new(Config)
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if _, err = d.Bind(cfg); err != nil {
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return nil, errors.Wrapf(err, "trace: invalid dsn: %s", rawdsn)
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}
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return cfg, nil
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}
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// TracerFromEnvFlag new tracer from env and flag
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func TracerFromEnvFlag() (Tracer, error) {
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cfg, err := parseDSN(_traceDSN)
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if err != nil {
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return nil, err
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}
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report := newReport(cfg.Network, cfg.Addr, time.Duration(cfg.Timeout), cfg.ProtocolVersion)
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return NewTracer(env.AppID, report, cfg.DisableSample, _probability), nil
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}
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// Init init trace report.
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func Init(cfg *Config) {
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if cfg == nil {
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// paser config from env
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var err error
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if cfg, err = parseDSN(_traceDSN); err != nil {
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panic(fmt.Errorf("parse trace dsn error: %s", err))
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}
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}
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report := newReport(cfg.Network, cfg.Addr, time.Duration(cfg.Timeout), cfg.ProtocolVersion)
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SetGlobalTracer(NewTracer(env.AppID, report, cfg.DisableSample, _probability))
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}
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