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flags.go
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flags.go
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// Copyright (c) 2019 The Jaeger Authors.
// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 app
import (
"bufio"
"flag"
"fmt"
"io"
"net/http"
"net/textproto"
"strings"
"time"
"github.com/spf13/viper"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/cmd/query/app/querysvc"
"github.com/jaegertracing/jaeger/model/adjuster"
"github.com/jaegertracing/jaeger/pkg/config"
"github.com/jaegertracing/jaeger/pkg/config/tlscfg"
"github.com/jaegertracing/jaeger/ports"
"github.com/jaegertracing/jaeger/storage"
)
const (
queryHostPort = "query.host-port"
queryPort = "query.port"
queryPortWarning = "(deprecated, will be removed after 2020-08-31 or in release v1.20.0, whichever is later)"
queryBasePath = "query.base-path"
queryStaticFiles = "query.static-files"
queryUIConfig = "query.ui-config"
queryTokenPropagation = "query.bearer-token-propagation"
queryAdditionalHeaders = "query.additional-headers"
queryMaxClockSkewAdjust = "query.max-clock-skew-adjustment"
)
var tlsFlagsConfig = tlscfg.ServerFlagsConfig{
Prefix: "query.grpc",
ShowEnabled: true,
ShowClientCA: true,
}
// QueryOptions holds configuration for query service
type QueryOptions struct {
// HostPort is the host:port address that the query service listens o n
HostPort string
// BasePath is the prefix for all UI and API HTTP routes
BasePath string
// StaticAssets is the path for the static assets for the UI (https://github.com/uber/jaeger-ui)
StaticAssets string
// UIConfig is the path to a configuration file for the UI
UIConfig string
// BearerTokenPropagation activate/deactivate bearer token propagation to storage
BearerTokenPropagation bool
// TLS configures secure transport
TLS tlscfg.Options
// AdditionalHeaders
AdditionalHeaders http.Header
// MaxClockSkewAdjust is the maximum duration by which jaeger-query will adjust a span
MaxClockSkewAdjust time.Duration
}
// AddFlags adds flags for QueryOptions
func AddFlags(flagSet *flag.FlagSet) {
flagSet.Var(&config.StringSlice{}, queryAdditionalHeaders, `Additional HTTP response headers. Can be specified multiple times. Format: "Key: Value"`)
flagSet.String(queryHostPort, ports.PortToHostPort(ports.QueryHTTP), "The host:port (e.g. 127.0.0.1:5555 or :5555) of the query's HTTP server")
flagSet.Int(queryPort, 0, queryPortWarning+" see --"+queryHostPort)
flagSet.String(queryBasePath, "/", "The base path for all HTTP routes, e.g. /jaeger; useful when running behind a reverse proxy")
flagSet.String(queryStaticFiles, "", "The directory path override for the static assets for the UI")
flagSet.String(queryUIConfig, "", "The path to the UI configuration file in JSON format")
flagSet.Bool(queryTokenPropagation, false, "Allow propagation of bearer token to be used by storage plugins")
flagSet.Duration(queryMaxClockSkewAdjust, time.Second, "The maximum delta by which span timestamps may be adjusted in the UI due to clock skew; set to 0s to disable clock skew adjustments")
}
// InitFromViper initializes QueryOptions with properties from viper
func (qOpts *QueryOptions) InitFromViper(v *viper.Viper, logger *zap.Logger) *QueryOptions {
qOpts.HostPort = ports.GetAddressFromCLIOptions(v.GetInt(queryPort), v.GetString(queryHostPort))
qOpts.BasePath = v.GetString(queryBasePath)
qOpts.StaticAssets = v.GetString(queryStaticFiles)
qOpts.UIConfig = v.GetString(queryUIConfig)
qOpts.BearerTokenPropagation = v.GetBool(queryTokenPropagation)
qOpts.TLS = tlsFlagsConfig.InitFromViper(v)
qOpts.MaxClockSkewAdjust = v.GetDuration(queryMaxClockSkewAdjust)
stringSlice := v.GetStringSlice(queryAdditionalHeaders)
headers, err := stringSliceAsHeader(stringSlice)
if err != nil {
logger.Error("Failed to parse headers", zap.Strings("slice", stringSlice), zap.Error(err))
} else {
qOpts.AdditionalHeaders = headers
}
return qOpts
}
// BuildQueryServiceOptions creates a QueryServiceOptions struct with appropriate adjusters and archive config
func (qOpts *QueryOptions) BuildQueryServiceOptions(storageFactory storage.Factory, logger *zap.Logger) *querysvc.QueryServiceOptions {
opts := &querysvc.QueryServiceOptions{}
if !opts.InitArchiveStorage(storageFactory, logger) {
logger.Info("Archive storage not initialized")
}
opts.Adjuster = adjuster.Sequence(querysvc.StandardAdjusters(qOpts.MaxClockSkewAdjust)...)
return opts
}
// stringSliceAsHeader parses a slice of strings and returns a http.Header.
// Each string in the slice is expected to be in the format "key: value"
func stringSliceAsHeader(slice []string) (http.Header, error) {
if len(slice) == 0 {
return nil, nil
}
allHeaders := strings.Join(slice, "\r\n")
reader := bufio.NewReader(strings.NewReader(allHeaders))
tp := textproto.NewReader(reader)
header, err := tp.ReadMIMEHeader()
if err != nil && err != io.EOF {
return nil, fmt.Errorf("failed to parse headers")
}
return http.Header(header), nil
}