/
main.go
185 lines (155 loc) · 3.55 KB
/
main.go
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// SPDX-FileCopyrightText: 2024 OOMOL, Inc. <https://www.oomol.com>
// SPDX-License-Identifier: MPL-2.0
package main
import (
"bufio"
"context"
"errors"
"fmt"
"net"
"os"
"os/signal"
"syscall"
"time"
"github.com/oomol-lab/ovm/pkg/channel"
"github.com/oomol-lab/ovm/pkg/cli"
"github.com/oomol-lab/ovm/pkg/gvproxy"
"github.com/oomol-lab/ovm/pkg/ipc/event"
"github.com/oomol-lab/ovm/pkg/logger"
"github.com/oomol-lab/ovm/pkg/sshagentsock"
"github.com/oomol-lab/ovm/pkg/utils"
"github.com/oomol-lab/ovm/pkg/vfkit"
"golang.org/x/sync/errgroup"
)
var (
opt *cli.Context
sigs = make(chan os.Signal, 1)
cleans []func()
)
func init() {
cli.Parse()
if err := cli.Validate(); err != nil {
fmt.Printf("validate flags error: %v\n", err)
exit(1)
}
opt = cli.Init()
if err := opt.PreSetup(); err != nil {
fmt.Printf("pre setup error: %v\n", err)
exit(1)
}
}
func main() {
// See: https://github.com/crc-org/vfkit/pull/13/commits/906916ab9b92af7a5662fd7fe9246d61d39da4ee
signal.Ignore(syscall.SIGPIPE)
{
if lock, err := makeSingleInstance(opt.LogPath, opt.LockFile, opt.ExecutablePath); err != nil {
fmt.Println("make single instance error:", err)
exit(1)
} else {
cleans = append(cleans, lock.Unlock)
}
}
log, err := logger.New(opt.LogPath, opt.Name+"-ovm")
if err != nil {
fmt.Printf("create ovm logger error: %v\n", err)
exit(1)
}
if err := opt.Setup(); err != nil {
log.Errorf("setup error: %v", err)
exit(1)
}
{
if err := event.Init(opt); err != nil {
log.Errorf("event init error: %v", err)
exit(1)
}
g := errgroup.Group{}
event.Subscribe(&g)
cleans = append(cleans, func() {
_ = g.Wait()
})
}
agent, err := sshagentsock.Start(opt.SSHAuthSocketPath, log)
if err != nil {
log.Errorf("start ssh agent sock error: %v", err)
exit(1)
}
event.Notify(event.Initializing)
ctx, cancel := context.WithCancel(context.Background())
g, ctx := errgroup.WithContext(ctx)
if err := ready(ctx, g, opt, log); err != nil {
log.Errorf("ready failed: %v", err)
cancel()
exit(1)
}
g.Go(func() error {
<-ctx.Done()
return agent.Close()
})
g.Go(func() error {
waitBindPID(ctx, log, opt.BindPID)
cancel()
return nil
})
g.Go(func() error {
return gvproxy.Run(ctx, g, opt)
})
g.Go(func() error {
return vfkit.Run(ctx, g, opt)
})
g.Go(func() error {
signal.Notify(sigs, os.Interrupt, syscall.SIGTERM)
select {
case sig := <-sigs:
log.Warnf("received %s signal, exiting...", sig)
cancel()
return errors.New("signal caught")
case <-ctx.Done():
return nil
}
})
if err := g.Wait(); err != nil {
log.Errorf("main error: %v", err)
event.NotifyError(err)
exit(1)
} else {
log.Info("main exit")
exit(0)
}
}
func ready(ctx context.Context, g *errgroup.Group, opt *cli.Context, log *logger.Context) error {
nl, err := net.Listen("unix", opt.SocketReadyPath)
if err != nil {
return err
}
g.Go(func() error {
conn, err := utils.AcceptTimeout(ctx, nl, time.After(30*time.Second))
if err != nil {
log.Errorf("ready accept timeout: %v", err)
return err
}
if _, rerr := bufio.NewReader(conn).ReadString('\n'); rerr != nil {
log.Errorf("read ready failed: %v", rerr)
err = rerr
} else {
channel.NotifyVMReady()
event.Notify(event.VMReady)
}
if cerr := conn.Close(); cerr != nil {
log.Errorf("close ready connection failed: %v", cerr)
err = cerr
}
return err
})
return nil
}
func exit(exitCode int) {
event.Notify(event.Exit)
for _, clean := range cleans {
clean()
}
close(sigs)
channel.Close()
logger.CloseAll()
os.Exit(exitCode)
}