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platform.go
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platform.go
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package platform
import (
"context"
"errors"
"os"
"time"
"github.com/spf13/pflag"
"go.uber.org/automaxprocs/maxprocs"
"go.uber.org/fx"
"google.golang.org/protobuf/types/known/wrapperspb"
infov1 "github.com/fluxninja/aperture/api/gen/proto/go/aperture/info/v1"
"github.com/fluxninja/aperture/pkg/alertmanager"
"github.com/fluxninja/aperture/pkg/alerts"
"github.com/fluxninja/aperture/pkg/config"
etcdclient "github.com/fluxninja/aperture/pkg/etcd/client"
fswatcher "github.com/fluxninja/aperture/pkg/filesystem/watcher"
"github.com/fluxninja/aperture/pkg/jobs"
"github.com/fluxninja/aperture/pkg/log"
"github.com/fluxninja/aperture/pkg/metrics"
_ "github.com/fluxninja/aperture/pkg/net" // needed for docs
"github.com/fluxninja/aperture/pkg/net/grpc"
"github.com/fluxninja/aperture/pkg/net/grpcgateway"
"github.com/fluxninja/aperture/pkg/net/health"
"github.com/fluxninja/aperture/pkg/net/http"
"github.com/fluxninja/aperture/pkg/net/listener"
"github.com/fluxninja/aperture/pkg/net/tlsconfig"
"github.com/fluxninja/aperture/pkg/panichandler"
"github.com/fluxninja/aperture/pkg/plugins"
"github.com/fluxninja/aperture/pkg/profilers"
"github.com/fluxninja/aperture/pkg/status"
"github.com/fluxninja/aperture/pkg/watchdog"
)
func init() {
_, _ = maxprocs.Set(maxprocs.Logger(log.Printf))
}
// Config is the configuration for the platform.
type Config struct {
// Additional config to be merged (used for unit tests etc)
MergeConfig map[string]interface{}
// Plugin symbols to look for
PluginSymbols []string
}
var platform = initPlatform()
// Platform holds the state of the platform.
type Platform struct {
statusRegistry status.Registry
unmarshaller config.Unmarshaller
dotgraph fx.DotGraph
}
func initPlatform() *Platform {
return &Platform{}
}
// optionGroup enables to append more options to application.
type optionGroup []fx.Option
// New returns a new fx.App with the provided options.
func New(opts ...fx.Option) *fx.App {
options := optionGroup(opts)
defer func() {
if v := recover(); v != nil {
panichandler.Crash(v)
}
}()
return fx.New(options...)
}
const (
dotFileKey = "dot_file"
)
func setFlags(fs *pflag.FlagSet) error {
fs.String(dotFileKey, "", "create fx dot file")
return nil
}
func provideFlagSetBuilder() config.FlagSetBuilderOut {
return config.FlagSetBuilderOut{Builder: setFlags}
}
// Module returns the platform module.
func (cfg Config) Module() fx.Option {
// purge previous temp
_ = os.RemoveAll(config.DefaultTempBase)
// mkdir temp
_ = os.MkdirAll(config.DefaultTempDirectory, os.ModePerm)
// Create a temporary Fx App to load plugins
var pluginOptions fx.Option
var registry *plugins.PluginRegistry
_ = fx.New(
config.ModuleConfig{MergeConfig: cfg.MergeConfig, UnknownFlags: true}.Module(),
plugins.ModuleConfig{PluginSymbols: cfg.PluginSymbols}.Module(),
fx.Populate(®istry),
fx.Populate(&pluginOptions),
fx.NopLogger,
)
options := fx.Options(
fx.Provide(
provideFlagSetBuilder,
),
config.ModuleConfig{MergeConfig: cfg.MergeConfig, UnknownFlags: false, ExitOnHelp: true}.Module(),
config.LogModule(),
alerts.Module(),
health.Module(),
http.ProxyModule(),
metrics.Module(),
watchdog.Module(),
fswatcher.Module(),
profilers.Module(),
ServerModule(false),
etcdclient.Module(),
jobs.Module(),
status.Module(),
fx.Populate(&platform.statusRegistry),
platformStatusModule(),
fx.Supply(registry),
fx.Populate(&platform.unmarshaller),
fx.Populate(&platform.dotgraph),
alertmanager.Module(),
)
if pluginOptions != nil {
options = fx.Options(
options,
pluginOptions,
)
}
return options
}
// ServerModule returns the platform server module.
func ServerModule(testMode bool) fx.Option {
var options fx.Option
if testMode {
options = fx.Options(
fx.Provide(listener.ProvideTestListener),
)
} else {
options = fx.Options(
listener.Module(),
)
}
options = fx.Options(options,
tlsconfig.Module(),
http.ServerModule(),
grpc.GMuxServerModule(),
grpcgateway.Module(),
grpcgateway.RegisterHandler{Handler: infov1.RegisterInfoServiceHandlerFromEndpoint}.Annotate(),
fx.Invoke(grpc.RegisterInfoService),
)
return options
}
// Run is an fx helper function to gracefully start and stop an app container.
func Run(app *fx.App) {
platform.statusRegistry = platform.statusRegistry.Child(platformStatusPath)
// Check for dotflag
if platform.unmarshaller != nil {
dotfile := config.GetStringValue(platform.unmarshaller, dotFileKey, "")
if dotfile != "" {
bytes := []byte(platform.dotgraph)
err := os.WriteFile(dotfile, bytes, 0o600)
if err != nil {
log.Error().Err(err).Str("file", dotfile).Msg("unable to write to file")
}
}
}
log.Info().Msg("Starting application")
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
if err := app.Start(ctx); err != nil {
log.Error().Err(err).Msg("Failed to start application")
return
}
defer stop(app)
platform.statusRegistry.SetStatus(status.NewStatus(wrapperspb.String("platform running"), nil))
// Wait for os.Signal
<-app.Done()
platform.statusRegistry.SetStatus(status.NewStatus(nil, errors.New("platform stopping")))
}
func stop(app *fx.App) {
log.Info().Msg("Stopping application")
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
defer cancel()
if err := app.Stop(ctx); err != nil {
log.Error().Err(err).Msg("Failed to stop application")
}
log.WaitFlush()
// cleanup temp
_ = os.RemoveAll(config.DefaultTempBase)
platform.statusRegistry.Detach()
os.Exit(0)
}