forked from secretflow/kuscia
/
chroot_starter.go
99 lines (80 loc) · 2.35 KB
/
chroot_starter.go
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// Copyright 2023 Ant Group Co., Ltd.
//
// 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 starter
import (
"fmt"
"os/exec"
"path/filepath"
"syscall"
mnt "github.com/secretflow/kuscia/pkg/agent/local/runtime/process/mount"
"github.com/secretflow/kuscia/pkg/utils/nlog"
"github.com/secretflow/kuscia/pkg/utils/paths"
)
type chrootStarter struct {
*exec.Cmd
mounter mnt.Mounter
config *InitConfig
}
func NewChrootStarter(c *InitConfig) (Starter, error) {
s := &chrootStarter{config: c}
cmdLine := wrapCommand(c.CmdLine)
s.Cmd = exec.Command(cmdLine[0], cmdLine[1:]...)
s.Cmd.Env = c.Env
s.Cmd.SysProcAttr = &syscall.SysProcAttr{
Setpgid: true,
}
s.Cmd.SysProcAttr.Chroot = c.Rootfs
s.Cmd.Dir = c.WorkingDir
if err := paths.EnsureDirectory(filepath.Join(c.Rootfs, c.WorkingDir), true); err != nil {
return nil, err
}
s.Cmd.Stdout = c.LogFile
s.Cmd.Stderr = c.LogFile
mounter, err := mnt.NewSysMounter(c.Rootfs)
if err != nil {
return nil, err
}
s.mounter = mounter
nlog.Infof("Build chroot cmd: %v, rootfs: %v, workingDir: %v,", s.Cmd, s.SysProcAttr.Chroot, s.Dir)
return s, nil
}
func wrapCommand(originalCmd []string) []string {
if len(originalCmd) == 0 {
return nil
}
var originalCmdStr = fmt.Sprintf("\"%s\"", originalCmd[0])
for i := 1; i < len(originalCmd); i++ {
originalCmdStr += fmt.Sprintf(" \"%s\"", originalCmd[i])
}
return []string{
"/bin/sh",
"-c",
fmt.Sprintf("source /etc/profile; source ~/.bashrc; %s", originalCmdStr),
}
}
func (s *chrootStarter) Start() error {
if err := mountSystemFile(s.mounter); err != nil {
return nil
}
if err := mountVolumes(s.config.Rootfs, s.mounter, s.config.ContainerConfig.Mounts); err != nil {
return err
}
return s.Cmd.Start()
}
func (s *chrootStarter) Command() *exec.Cmd {
return s.Cmd
}
func (s *chrootStarter) Release() error {
return s.mounter.UmountRoot()
}