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main.go
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main.go
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// Copyright (c) Ultraviolet
// SPDX-License-Identifier: Apache-2.0
package main
import (
"context"
"fmt"
"log"
"log/slog"
"os"
"strings"
mglog "github.com/absmach/magistrala/logger"
"github.com/absmach/magistrala/pkg/uuid"
"github.com/ultravioletrs/cocos/internal"
"github.com/ultravioletrs/cocos/internal/env"
jaegerclient "github.com/ultravioletrs/cocos/internal/jaeger"
"github.com/ultravioletrs/cocos/manager"
"github.com/ultravioletrs/cocos/manager/api"
managerapi "github.com/ultravioletrs/cocos/manager/api/grpc"
"github.com/ultravioletrs/cocos/manager/qemu"
"github.com/ultravioletrs/cocos/manager/tracing"
"github.com/ultravioletrs/cocos/pkg/clients/grpc"
managergrpc "github.com/ultravioletrs/cocos/pkg/clients/grpc/manager"
pkgmanager "github.com/ultravioletrs/cocos/pkg/manager"
"go.opentelemetry.io/otel/trace"
"golang.org/x/sync/errgroup"
)
const (
svcName = "manager"
envPrefixGRPC = "MANAGER_GRPC_"
envPrefixQemu = "MANAGER_QEMU_"
)
type config struct {
LogLevel string `env:"MANAGER_LOG_LEVEL" envDefault:"info"`
JaegerURL string `env:"COCOS_JAEGER_URL" envDefault:"http://localhost:14268/api/traces"`
InstanceID string `env:"MANAGER_INSTANCE_ID" envDefault:""`
}
func main() {
ctx := context.Background()
g, ctx := errgroup.WithContext(ctx)
var cfg config
if err := env.Parse(&cfg); err != nil {
log.Fatalf("failed to load %s configuration : %s", svcName, err)
}
logger, err := mglog.New(os.Stdout, cfg.LogLevel)
if err != nil {
log.Fatalf(err.Error())
}
if cfg.InstanceID == "" {
cfg.InstanceID, err = uuid.New().ID()
if err != nil {
logger.Error(fmt.Sprintf("Failed to generate instance ID: %s", err))
return
}
}
tp, err := jaegerclient.NewProvider(ctx, svcName, cfg.JaegerURL, cfg.InstanceID)
if err != nil {
logger.Error(fmt.Sprintf("Failed to init Jaeger: %s", err))
}
defer func() {
if err := tp.Shutdown(ctx); err != nil {
logger.Error(fmt.Sprintf("Error shutting down tracer provider: %v", err))
}
}()
tracer := tp.Tracer(svcName)
qemuCfg := qemu.Config{}
if err := env.Parse(&qemuCfg, env.Options{Prefix: envPrefixQemu}); err != nil {
logger.Error(fmt.Sprintf("failed to load QEMU configuration: %s", err))
return
}
exe, args, err := qemu.ExecutableAndArgs(qemuCfg)
if err != nil {
logger.Error(fmt.Sprintf("failed to parse QEMU configuration: %s", err))
return
}
logger.Info(fmt.Sprintf("%s %s", exe, strings.Join(args, " ")))
managerGRPCConfig := grpc.Config{}
if err := env.Parse(&managerGRPCConfig, env.Options{Prefix: envPrefixGRPC}); err != nil {
logger.Error(fmt.Sprintf("failed to load %s gRPC client configuration : %s", svcName, err))
return
}
managerGRPCClient, managerClient, err := managergrpc.NewManagerClient(managerGRPCConfig)
if err != nil {
logger.Error(err.Error())
return
}
defer managerGRPCClient.Close()
pc, err := managerClient.Process(ctx)
if err != nil {
logger.Error(err.Error())
return
}
eventsChan := make(chan *pkgmanager.ClientStreamMessage)
svc := newService(logger, tracer, qemuCfg, eventsChan)
mc := managerapi.NewClient(pc, svc, eventsChan)
g.Go(func() error {
return mc.Process(ctx)
})
if err := g.Wait(); err != nil {
logger.Error(fmt.Sprintf("%s service terminated: %s", svcName, err))
}
err = internal.DeleteFilesInDir(qemuCfg.TmpFileLoc)
if err != nil {
logger.Error(err.Error())
}
}
func newService(logger *slog.Logger, tracer trace.Tracer, qemuCfg qemu.Config, eventsChan chan *pkgmanager.ClientStreamMessage) manager.Service {
svc := manager.New(qemuCfg, logger, eventsChan)
go svc.RetrieveAgentEventsLogs()
svc = api.LoggingMiddleware(svc, logger)
counter, latency := internal.MakeMetrics(svcName, "api")
svc = api.MetricsMiddleware(svc, counter, latency)
svc = tracing.New(svc, tracer)
return svc
}