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main.go
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main.go
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// Copyright © 2018 Banzai Cloud
//
// 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 main Product Info.
//
// The product info application uses the cloud provider APIs to asynchronously fetch and parse instance type attributes
// and prices, while storing the results in an in memory cache and making it available as structured data through a REST API.
//
// Schemes: http, https
// BasePath: /api/v1
// Version: 0.0.1
// License: Apache 2.0 http://www.apache.org/licenses/LICENSE-2.0.html
// Contact: Banzai Cloud<info@banzaicloud.com>
//
// swagger:meta
package main
import (
"fmt"
"net/url"
"os"
"emperror.dev/emperror"
"emperror.dev/errors"
"github.com/gin-gonic/gin"
vaultremote "github.com/sagikazarmark/viperx/remote"
_ "github.com/sagikazarmark/viperx/remote/bankvaults"
"github.com/spf13/pflag"
"github.com/spf13/viper"
"github.com/banzaicloud/cloudinfo/internal/app/cloudinfo/api"
"github.com/banzaicloud/cloudinfo/internal/app/cloudinfo/cistore"
"github.com/banzaicloud/cloudinfo/internal/app/cloudinfo/loader"
"github.com/banzaicloud/cloudinfo/internal/app/cloudinfo/management"
"github.com/banzaicloud/cloudinfo/internal/app/cloudinfo/messaging"
"github.com/banzaicloud/cloudinfo/internal/app/cloudinfo/tracing"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/cloudinfoadapter"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/cloudinfodriver"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/metrics"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/providers/alibaba"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/providers/amazon"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/providers/azure"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/providers/digitalocean"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/providers/google"
"github.com/banzaicloud/cloudinfo/internal/cloudinfo/providers/oracle"
"github.com/banzaicloud/cloudinfo/internal/platform/buildinfo"
"github.com/banzaicloud/cloudinfo/internal/platform/errorhandler"
"github.com/banzaicloud/cloudinfo/internal/platform/log"
)
// Provisioned by ldflags
// nolint: gochecknoglobals
var (
version string
commitHash string
buildDate string
)
func main() {
v, p := viper.New(), pflag.NewFlagSet(friendlyAppName, pflag.ExitOnError)
configure(v, p)
p.String("config", "", "Configuration file")
p.Bool("version", false, "Show version information")
p.Bool("dump-config", false, "Dump configuration to the console (and exit)")
_ = p.Parse(os.Args[1:])
if v, _ := p.GetBool("version"); v {
fmt.Printf("%s version %s (%s) built on %s\n", friendlyAppName, version, commitHash, buildDate)
os.Exit(0)
}
if c, _ := p.GetString("config"); c != "" {
v.SetConfigFile(c)
}
err := v.ReadInConfig()
_, configFileNotFound := err.(viper.ConfigFileNotFoundError)
if !configFileNotFound {
emperror.Panic(errors.Wrap(err, "failed to read configuration"))
}
var metaConfig metaConfiguration
err = v.UnmarshalKey("config", &metaConfig)
emperror.Panic(errors.Wrap(err, "failed to unmarshal meta configuration"))
err = metaConfig.Validate()
emperror.Panic(err)
if metaConfig.Vault.Enabled {
vaultremote.SetErrorHandler(errorhandler.NewPanicHandler())
u, _ := url.Parse(metaConfig.Vault.Address)
q := u.Query()
q.Set("token", metaConfig.Vault.Token)
u.RawQuery = q.Encode()
err = v.AddRemoteProvider("bankvaults", u.String(), metaConfig.Vault.SecretPath)
emperror.Panic(errors.Wrap(err, "failed to add vault config provider"))
v.SetConfigType("json")
err = v.ReadRemoteConfig()
emperror.Panic(errors.Wrap(err, "failed to read remote configuration"))
}
var config configuration
err = v.Unmarshal(&config)
emperror.Panic(errors.Wrap(err, "failed to unmarshal configuration"))
// Create logger (first thing after configuration loading)
logger := log.NewLogger(config.Log)
// Provide some basic context to all log lines
logger = log.WithFields(logger, map[string]interface{}{"environment": config.Environment, "application": appName})
log.SetStandardLogger(logger)
if configFileNotFound {
logger.Warn("configuration file not found")
}
err = config.Validate()
if err != nil {
logger.Error(err.Error())
os.Exit(3)
}
if d, _ := p.GetBool("dump-config"); d {
fmt.Printf("%+v\n", config)
os.Exit(0)
}
// Configure error handler
errorHandler := errorhandler.New(logger)
defer emperror.HandleRecover(errorHandler)
buildInfo := buildinfo.New(version, commitHash, buildDate)
logger.Info("starting application", buildInfo.Fields())
// default tracer
tracer := tracing.NewNoOpTracer()
// Configure Jaeger
if config.Jaeger.Enabled {
logger.Info("jaeger exporter enabled")
tracing.SetupTracing(config.Jaeger.Config, emperror.NoopHandler{})
tracer = tracing.NewTracer()
}
cloudInfoLogger := cloudinfoadapter.NewLogger(logger)
// use the configured store implementation
cloudInfoStore := cistore.NewCloudInfoStore(config.Store, cloudInfoLogger)
defer cloudInfoStore.Close()
if !cloudInfoStore.Ready() {
emperror.Panic(errors.New("configured product store not available"))
}
infoers, providers, err := loadInfoers(config, cloudInfoLogger)
emperror.Panic(err)
reporter := metrics.NewDefaultMetricsReporter()
eventBus := messaging.NewDefaultEventBus(errorHandler)
serviceManager := loader.NewDefaultServiceManager(config.ServiceLoader, cloudInfoStore, cloudInfoLogger, eventBus)
serviceManager.ConfigureServices(providers, config.Distribution)
serviceManager.LoadServiceInformation(providers)
prodInfo, err := cloudinfo.NewCloudInfo(providers, cloudInfoStore, cloudInfoLogger)
emperror.Panic(err)
if config.Scrape.Enabled {
scrapingDriver := cloudinfo.NewScrapingDriver(config.Scrape.Interval, infoers, cloudInfoStore, eventBus, reporter, tracer, errorHandler, cloudInfoLogger)
err = scrapingDriver.StartScraping()
emperror.Panic(err)
// start the management service
// TODO: management requires scraping at the moment. Let's remove that dependency.
if config.Management.Enabled {
go management.StartManagementEngine(config.Management, cloudInfoStore, *scrapingDriver, cloudInfoLogger)
}
}
err = api.ConfigureValidator(providers, prodInfo, cloudInfoLogger)
emperror.Panic(err)
cloudinfoLogger := cloudinfoadapter.NewLogger(logger)
providerService := cloudinfo.NewProviderService(prodInfo)
serviceService := cloudinfo.NewServiceService(prodInfo)
regionService := cloudinfo.NewRegionService(prodInfo)
instanceTypeService := cloudinfo.NewInstanceTypeService(prodInfo)
endpoints := cloudinfodriver.MakeEndpoints(instanceTypeService)
providerEndpoints := cloudinfodriver.MakeProviderEndpoints(providerService, cloudinfoLogger)
serviceEndpoints := cloudinfodriver.MakeServiceEndpoints(serviceService, cloudinfoLogger)
regionEndpoints := cloudinfodriver.MakeRegionEndpoints(regionService, cloudinfoLogger)
graphqlHandler := cloudinfodriver.MakeGraphQLHandler(
endpoints,
providerEndpoints,
serviceEndpoints,
regionEndpoints,
errorHandler,
)
routeHandler := api.NewRouteHandler(prodInfo, buildInfo, graphqlHandler, cloudInfoLogger)
// new default gin engine (recovery, logger middleware)
router := gin.Default()
// add prometheus metric endpoint
if config.Metrics.Enabled {
logger.Info("metrics enabled")
routeHandler.EnableMetrics(router, config.Metrics.Address)
}
routeHandler.ConfigureRoutes(router, config.App.BasePath)
err = router.Run(config.App.Address)
emperror.Panic(errors.Wrap(err, "failed to run router"))
}
func loadInfoers(config configuration, logger cloudinfo.Logger) (map[string]cloudinfo.CloudInfoer, []string, error) {
infoers := map[string]cloudinfo.CloudInfoer{}
var providers []string
if config.Provider.Amazon.Enabled {
providers = append(providers, Amazon)
logger := logger.WithFields(map[string]interface{}{"provider": Amazon})
infoer, err := amazon.NewAmazonInfoer(config.Provider.Amazon.Config, logger)
if err != nil {
return nil, nil, errors.WithDetails(err, "provider", Amazon)
}
infoers[Amazon] = infoer
logger.Info("configured cloud info provider")
}
if config.Provider.Google.Enabled {
providers = append(providers, Google)
logger := logger.WithFields(map[string]interface{}{"provider": Google})
infoer, err := google.NewGoogleInfoer(config.Provider.Google.Config, logger)
if err != nil {
return nil, nil, emperror.With(err, "provider", Google)
}
infoers[Google] = infoer
logger.Info("configured cloud info provider")
}
if config.Provider.Alibaba.Enabled {
providers = append(providers, Alibaba)
logger := logger.WithFields(map[string]interface{}{"provider": Alibaba})
infoer, err := alibaba.NewAlibabaInfoer(config.Provider.Alibaba.Config, logger)
if err != nil {
return nil, nil, emperror.With(err, "provider", Alibaba)
}
infoers[Alibaba] = infoer
logger.Info("configured cloud info provider")
}
if config.Provider.Oracle.Enabled {
providers = append(providers, Oracle)
logger := logger.WithFields(map[string]interface{}{"provider": Oracle})
infoer, err := oracle.NewOracleInfoer(config.Provider.Oracle.Config, logger)
if err != nil {
return nil, nil, emperror.With(err, "provider", Oracle)
}
infoers[Oracle] = infoer
logger.Info("configured cloud info provider")
}
if config.Provider.Azure.Enabled {
providers = append(providers, Azure)
logger := logger.WithFields(map[string]interface{}{"provider": Azure})
infoer, err := azure.NewAzureInfoer(config.Provider.Azure.Config, logger)
if err != nil {
return nil, nil, emperror.With(err, "provider", Azure)
}
infoers[Azure] = infoer
logger.Info("configured cloud info provider")
}
if config.Provider.Digitalocean.Enabled {
providers = append(providers, Digitalocean)
logger := logger.WithFields(map[string]interface{}{"provider": Digitalocean})
infoer, err := digitalocean.NewDigitaloceanInfoer(config.Provider.Digitalocean.Config, logger)
if err != nil {
return nil, nil, emperror.With(err, "provider", Digitalocean)
}
infoers[Digitalocean] = infoer
logger.Info("configured cloud info provider")
}
if config.Provider.VSphere.Enabled {
providers = append(providers, Vsphere)
logger := logger.WithFields(map[string]interface{}{"provider": Vsphere})
logger.Info("configured cloud info provider")
}
return infoers, providers, nil
}