1
0
out-of-tree/container.go

101 lines
2.2 KiB
Go

// Copyright 2023 Mikhail Klementev. All rights reserved.
// Use of this source code is governed by a AGPLv3 license
// (or later) that can be found in the LICENSE file.
package main
import (
"errors"
"fmt"
"os"
"os/exec"
"os/user"
"time"
"github.com/rs/zerolog/log"
)
type container struct {
name string
timeout time.Duration
Volumes struct {
LibModules string
UsrSrc string
Boot string
}
// Additional arguments
Args []string
}
func NewContainer(name string, timeout time.Duration) (c container, err error) {
c.name = name
c.timeout = timeout
usr, err := user.Current()
if err != nil {
return
}
c.Volumes.LibModules = fmt.Sprintf(
"%s/.out-of-tree/volumes/%s/lib/modules", usr.HomeDir, name)
os.MkdirAll(c.Volumes.LibModules, 0777)
c.Volumes.UsrSrc = fmt.Sprintf(
"%s/.out-of-tree/volumes/%s/usr/src", usr.HomeDir, name)
os.MkdirAll(c.Volumes.UsrSrc, 0777)
c.Volumes.Boot = fmt.Sprintf(
"%s/.out-of-tree/volumes/%s/boot", usr.HomeDir, name)
os.MkdirAll(c.Volumes.Boot, 0777)
return
}
func (c container) Build(imagePath string) (output string, err error) {
args := []string{"build"}
args = append(args, "-t", c.name, imagePath)
cmd := exec.Command("docker", args...)
log.Debug().Msgf("%v", cmd)
rawOutput, err := cmd.CombinedOutput()
output = string(rawOutput)
return
}
func (c container) Run(workdir string, command string) (output string, err error) {
var args []string
args = append(args, "run", "--rm")
args = append(args, c.Args...)
args = append(args,
"-v", workdir+":/work",
"-v", c.Volumes.LibModules+":/lib/modules",
"-v", c.Volumes.UsrSrc+":/usr/src",
"-v", c.Volumes.Boot+":/boot")
args = append(args, c.name, "bash", "-c", "cd /work && "+command)
cmd := exec.Command("docker", args...)
log.Debug().Msgf("%v", cmd)
timer := time.AfterFunc(c.timeout, func() {
log.Info().Str("container", c.name).
Str("workdir", workdir).
Str("command", command).
Msg("killing container by timeout")
cmd.Process.Kill()
})
defer timer.Stop()
raw, err := cmd.CombinedOutput()
if err != nil {
e := fmt.Sprintf("error `%v` for cmd `%v` with output `%v`",
err, command, string(raw))
err = errors.New(e)
return
}
output = string(raw)
return
}