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/*
FilesystemDeploy Action
Deploy prepared root filesystem to output image. This action requires
'image-partition' action to be executed before it.
Yaml syntax:
- action: filesystem-deploy
setup-fstab: bool
setup-kernel-cmdline: bool
append-kernel-cmdline: arguments
Optional properties:
- setup-fstab -- generate '/etc/fstab' file according to information provided
by 'image-partition' action. By default is 'true'.
- setup-kernel-cmdline -- add location of root partition to '/etc/kernel/cmdline'
file on target image. By default is 'true'.
- append-kernel-cmdline -- additional kernel command line arguments passed to kernel.
*/
package actions
import (
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"path"
"strings"
"github.com/go-debos/debos"
)
type FilesystemDeployAction struct {
debos.BaseAction `yaml:",inline"`
SetupFSTab bool `yaml:"setup-fstab"`
SetupKernelCmdline bool `yaml:"setup-kernel-cmdline"`
AppendKernelCmdline string `yaml:"append-kernel-cmdline"`
}
func NewFilesystemDeployAction() *FilesystemDeployAction {
fd := &FilesystemDeployAction{SetupFSTab: true, SetupKernelCmdline: true}
fd.Description = "Deploying filesystem"
return fd
}
func (fd *FilesystemDeployAction) setupFSTab(context *debos.DebosContext) error {
if context.ImageFSTab.Len() == 0 {
return errors.New("Fstab not generated, missing image-partition action?")
}
log.Print("Setting up fstab")
err := os.MkdirAll(path.Join(context.Rootdir, "etc"), 0755)
if err != nil {
return fmt.Errorf("Couldn't create etc in image: %v", err)
}
fstab := path.Join(context.Rootdir, "etc/fstab")
f, err := os.OpenFile(fstab, os.O_RDWR|os.O_CREATE, 0755)
if err != nil {
return fmt.Errorf("Couldn't open fstab: %v", err)
}
_, err = io.Copy(f, &context.ImageFSTab)
if err != nil {
return fmt.Errorf("Couldn't write fstab: %v", err)
}
f.Close()
return nil
}
func (fd *FilesystemDeployAction) setupKernelCmdline(context *debos.DebosContext) error {
var cmdline []string
log.Print("Setting up /etc/kernel/cmdline")
err := os.MkdirAll(path.Join(context.Rootdir, "etc", "kernel"), 0755)
if err != nil {
return fmt.Errorf("Couldn't create etc/kernel in image: %v", err)
}
path := path.Join(context.Rootdir, "etc/kernel/cmdline")
current, _ := ioutil.ReadFile(path)
f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, 0755)
if err != nil {
log.Fatalf("Couldn't open kernel cmdline: %v", err)
}
cmdline = append(cmdline, strings.TrimSpace(string(current)))
cmdline = append(cmdline, context.ImageKernelRoot)
if fd.AppendKernelCmdline != "" {
cmdline = append(cmdline, fd.AppendKernelCmdline)
}
_, err = f.WriteString(strings.Join(cmdline, " ") + "\n")
if err != nil {
return fmt.Errorf("Couldn't write kernel/cmdline: %v", err)
}
f.Close()
return nil
}
func (fd *FilesystemDeployAction) Run(context *debos.DebosContext) error {
fd.LogStart()
/* Copying files is actually silly hafd, one has to keep permissions, ACL's
* extended attribute, misc, other. Leave it to cp...
*/
err := debos.Command{}.Run("Deploy to image", "cp", "-a", context.Rootdir+"/.", context.ImageMntDir)
if err != nil {
return fmt.Errorf("rootfs deploy failed: %v", err)
}
context.Rootdir = context.ImageMntDir
context.Origins["filesystem"] = context.ImageMntDir
if fd.SetupFSTab {
err = fd.setupFSTab(context)
if err != nil {
return err
}
}
if fd.SetupKernelCmdline {
err = fd.setupKernelCmdline(context)
if err != nil {
return err
}
}
return nil
}
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