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moby--moby
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Move init volumes code to func 

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
This commit is contained in:
Michael Crosby 2014-05-19 22:04:51 +00:00
parent b466672a4c
commit e454be7567
5 changed files with 138 additions and 114 deletions
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3
daemon/daemon.go
View File

@ -607,15 +607,18 @@ func (daemon *Daemon) Commit(container *Container, repository, tag, comment, aut
containerID, containerImage string
containerConfig *runconfig.Config
)
if container != nil {
containerID = container.ID
containerImage = container.Image
containerConfig = container.Config
}
img, err := daemon.graph.Create(rwTar, containerID, containerImage, comment, author, containerConfig, config)
if err != nil {
return nil, err
}
// Register the image if needed
if repository != "" {
if err := daemon.repositories.Set(repository, tag, img.ID, true); err != nil {

222
daemon/volumes.go
View File

@ -162,114 +162,10 @@ func createVolumes(container *Container) error {
return err
}
volumesDriver := container.daemon.volumes.Driver()
// Create the requested volumes if they don't exist
for volPath := range container.Config.Volumes {
volPath = filepath.Clean(volPath)
volIsDir := true
// Skip existing volumes
if _, exists := container.Volumes[volPath]; exists {
continue
}
var srcPath string
var isBindMount bool
srcRW := false
// If an external bind is defined for this volume, use that as a source
if bindMap, exists := binds[volPath]; exists {
isBindMount = true
srcPath = bindMap.SrcPath
if !filepath.IsAbs(srcPath) {
return fmt.Errorf("%s must be an absolute path", srcPath)
}
if strings.ToLower(bindMap.Mode) == "rw" {
srcRW = true
}
if stat, err := os.Stat(bindMap.SrcPath); err != nil {
return err
} else {
volIsDir = stat.IsDir()
}
// Otherwise create an directory in $ROOT/volumes/ and use that
} else {
// Do not pass a container as the parameter for the volume creation.
// The graph driver using the container's information ( Image ) to
// create the parent.
c, err := container.daemon.volumes.Create(nil, "", "", "", "", nil, nil)
if err != nil {
return err
}
srcPath, err = volumesDriver.Get(c.ID, "")
if err != nil {
return fmt.Errorf("Driver %s failed to get volume rootfs %s: %s", volumesDriver, c.ID, err)
}
srcRW = true // RW by default
}
if p, err := filepath.EvalSymlinks(srcPath); err != nil {
if err := initializeVolume(container, volPath, binds); err != nil {
return err
} else {
srcPath = p
}
// Create the mountpoint
rootVolPath, err := symlink.FollowSymlinkInScope(filepath.Join(container.basefs, volPath), container.basefs)
if err != nil {
return err
}
newVolPath, err := filepath.Rel(container.basefs, rootVolPath)
if err != nil {
return err
}
newVolPath = "/" + newVolPath
if volPath != newVolPath {
delete(container.Volumes, volPath)
delete(container.VolumesRW, volPath)
}
container.Volumes[newVolPath] = srcPath
container.VolumesRW[newVolPath] = srcRW
if err := createIfNotExists(rootVolPath, volIsDir); err != nil {
return err
}
// Do not copy or change permissions if we are mounting from the host
if srcRW && !isBindMount {
volList, err := ioutil.ReadDir(rootVolPath)
if err != nil {
return err
}
if len(volList) > 0 {
srcList, err := ioutil.ReadDir(srcPath)
if err != nil {
return err
}
if len(srcList) == 0 {
// If the source volume is empty copy files from the root into the volume
if err := archive.CopyWithTar(rootVolPath, srcPath); err != nil {
return err
}
}
}
var stat syscall.Stat_t
if err := syscall.Stat(rootVolPath, &stat); err != nil {
return err
}
var srcStat syscall.Stat_t
if err := syscall.Stat(srcPath, &srcStat); err != nil {
return err
}
// Change the source volume's ownership if it differs from the root
// files that were just copied
if stat.Uid != srcStat.Uid || stat.Gid != srcStat.Gid {
if err := os.Chown(srcPath, int(stat.Uid), int(stat.Gid)); err != nil {
return err
}
}
}
}
return nil
@ -296,3 +192,119 @@ func createIfNotExists(path string, isDir bool) error {
}
return nil
}
func initializeVolume(container *Container, volPath string, binds map[string]BindMap) error {
volumesDriver := container.daemon.volumes.Driver()
volPath = filepath.Clean(volPath)
// Skip existing volumes
if _, exists := container.Volumes[volPath]; exists {
return nil
}
var (
srcPath string
isBindMount bool
volIsDir = true
srcRW = false
)
// If an external bind is defined for this volume, use that as a source
if bindMap, exists := binds[volPath]; exists {
isBindMount = true
srcPath = bindMap.SrcPath
if !filepath.IsAbs(srcPath) {
return fmt.Errorf("%s must be an absolute path", srcPath)
}
if strings.ToLower(bindMap.Mode) == "rw" {
srcRW = true
}
if stat, err := os.Stat(bindMap.SrcPath); err != nil {
return err
} else {
volIsDir = stat.IsDir()
}
// Otherwise create an directory in $ROOT/volumes/ and use that
} else {
// Do not pass a container as the parameter for the volume creation.
// The graph driver using the container's information ( Image ) to
// create the parent.
c, err := container.daemon.volumes.Create(nil, "", "", "", "", nil, nil)
if err != nil {
return err
}
srcPath, err = volumesDriver.Get(c.ID, "")
if err != nil {
return fmt.Errorf("Driver %s failed to get volume rootfs %s: %s", volumesDriver, c.ID, err)
}
srcRW = true // RW by default
}
if p, err := filepath.EvalSymlinks(srcPath); err != nil {
return err
} else {
srcPath = p
}
// Create the mountpoint
rootVolPath, err := symlink.FollowSymlinkInScope(filepath.Join(container.basefs, volPath), container.basefs)
if err != nil {
return err
}
newVolPath, err := filepath.Rel(container.basefs, rootVolPath)
if err != nil {
return err
}
newVolPath = "/" + newVolPath
if volPath != newVolPath {
delete(container.Volumes, volPath)
delete(container.VolumesRW, volPath)
}
container.Volumes[newVolPath] = srcPath
container.VolumesRW[newVolPath] = srcRW
if err := createIfNotExists(rootVolPath, volIsDir); err != nil {
return err
}
// Do not copy or change permissions if we are mounting from the host
if srcRW && !isBindMount {
volList, err := ioutil.ReadDir(rootVolPath)
if err != nil {
return err
}
if len(volList) > 0 {
srcList, err := ioutil.ReadDir(srcPath)
if err != nil {
return err
}
if len(srcList) == 0 {
// If the source volume is empty copy files from the root into the volume
if err := archive.CopyWithTar(rootVolPath, srcPath); err != nil {
return err
}
}
}
var stat syscall.Stat_t
if err := syscall.Stat(rootVolPath, &stat); err != nil {
return err
}
var srcStat syscall.Stat_t
if err := syscall.Stat(srcPath, &srcStat); err != nil {
return err
}
// Change the source volume's ownership if it differs from the root
// files that were just copied
if stat.Uid != srcStat.Uid || stat.Gid != srcStat.Gid {
if err := os.Chown(srcPath, int(stat.Uid), int(stat.Gid)); err != nil {
return err
}
}
}
return nil
}

15
graph/graph.go
View File

@ -2,12 +2,6 @@ package graph
import (
"fmt"
"github.com/dotcloud/docker/archive"
"github.com/dotcloud/docker/daemon/graphdriver"
"github.com/dotcloud/docker/dockerversion"
"github.com/dotcloud/docker/image"
"github.com/dotcloud/docker/runconfig"
"github.com/dotcloud/docker/utils"
"io"
"io/ioutil"
"os"
@ -17,6 +11,13 @@ import (
"strings"
"syscall"
"time"
"github.com/dotcloud/docker/archive"
"github.com/dotcloud/docker/daemon/graphdriver"
"github.com/dotcloud/docker/dockerversion"
"github.com/dotcloud/docker/image"
"github.com/dotcloud/docker/runconfig"
"github.com/dotcloud/docker/utils"
)
// A Graph is a store for versioned filesystem images and the relationship between them.
@ -141,11 +142,13 @@ func (graph *Graph) Create(layerData archive.ArchiveReader, containerID, contain
Architecture: runtime.GOARCH,
OS: runtime.GOOS,
}
if containerID != "" {
img.Parent = containerImage
img.Container = containerID
img.ContainerConfig = *containerConfig
}
if err := graph.Register(nil, layerData, img); err != nil {
return nil, err
}

4
runconfig/merge.go
View File

@ -1,9 +1,10 @@
package runconfig
import (
"strings"
"github.com/dotcloud/docker/nat"
"github.com/dotcloud/docker/utils"
"strings"
)
func Merge(userConf, imageConf *Config) error {
@ -82,6 +83,7 @@ func Merge(userConf, imageConf *Config) error {
}
}
}
if userConf.Cmd == nil || len(userConf.Cmd) == 0 {
userConf.Cmd = imageConf.Cmd
}

8
server/server.go
View File

@ -1050,8 +1050,12 @@ func (srv *Server) ContainerCommit(job *engine.Job) engine.Status {
if container == nil {
return job.Errorf("No such container: %s", name)
}
var config = container.Config
var newConfig runconfig.Config
var (
config = container.Config
newConfig runconfig.Config
)
if err := job.GetenvJson("config", &newConfig); err != nil {
return job.Error(err)
}