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Diffstat (limited to 'pkg/spec/storage.go')
-rw-r--r--pkg/spec/storage.go875
1 files changed, 0 insertions, 875 deletions
diff --git a/pkg/spec/storage.go b/pkg/spec/storage.go
deleted file mode 100644
index b441daf08..000000000
--- a/pkg/spec/storage.go
+++ /dev/null
@@ -1,875 +0,0 @@
-package createconfig
-
-import (
- "fmt"
- "os"
- "path"
- "path/filepath"
- "strings"
-
- "github.com/containers/buildah/pkg/parse"
- "github.com/containers/podman/v2/libpod"
- "github.com/containers/podman/v2/pkg/util"
- spec "github.com/opencontainers/runtime-spec/specs-go"
- "github.com/pkg/errors"
- "github.com/sirupsen/logrus"
-)
-
-const (
- // TypeBind is the type for mounting host dir
- TypeBind = "bind"
- // TypeVolume is the type for named volumes
- TypeVolume = "volume"
- // TypeTmpfs is the type for mounting tmpfs
- TypeTmpfs = "tmpfs"
-)
-
-var (
- errDuplicateDest = errors.Errorf("duplicate mount destination")
- optionArgError = errors.Errorf("must provide an argument for option")
- noDestError = errors.Errorf("must set volume destination")
-)
-
-// Parse all volume-related options in the create config into a set of mounts
-// and named volumes to add to the container.
-// Handles --volumes-from, --volumes, --tmpfs, --init, and --init-path flags.
-// TODO: Named volume options - should we default to rprivate? It bakes into a
-// bind mount under the hood...
-// TODO: handle options parsing/processing via containers/storage/pkg/mount
-func (config *CreateConfig) parseVolumes(runtime *libpod.Runtime) ([]spec.Mount, []*libpod.ContainerNamedVolume, error) {
- // Add image volumes.
- baseMounts, baseVolumes, err := config.getImageVolumes()
- if err != nil {
- return nil, nil, err
- }
-
- // Add --volumes-from.
- // Overrides image volumes unconditionally.
- vFromMounts, vFromVolumes, err := config.getVolumesFrom(runtime)
- if err != nil {
- return nil, nil, err
- }
- for dest, mount := range vFromMounts {
- baseMounts[dest] = mount
- }
- for dest, volume := range vFromVolumes {
- baseVolumes[dest] = volume
- }
-
- // Next mounts from the --mounts flag.
- // Do not override yet.
- unifiedMounts, unifiedVolumes, err := config.getMounts()
- if err != nil {
- return nil, nil, err
- }
-
- // Next --volumes flag.
- // Do not override yet.
- volumeMounts, volumeVolumes, err := config.getVolumeMounts()
- if err != nil {
- return nil, nil, err
- }
-
- // Next --tmpfs flag.
- // Do not override yet.
- tmpfsMounts, err := config.getTmpfsMounts()
- if err != nil {
- return nil, nil, err
- }
-
- // Unify mounts from --mount, --volume, --tmpfs.
- // Also add mounts + volumes directly from createconfig.
- // Start with --volume.
- for dest, mount := range volumeMounts {
- if _, ok := unifiedMounts[dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, dest)
- }
- unifiedMounts[dest] = mount
- }
- for dest, volume := range volumeVolumes {
- if _, ok := unifiedVolumes[dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, dest)
- }
- unifiedVolumes[dest] = volume
- }
- // Now --tmpfs
- for dest, tmpfs := range tmpfsMounts {
- if _, ok := unifiedMounts[dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, dest)
- }
- unifiedMounts[dest] = tmpfs
- }
- // Now spec mounts and volumes
- for _, mount := range config.Mounts {
- dest := mount.Destination
- if _, ok := unifiedMounts[dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, dest)
- }
- unifiedMounts[dest] = mount
- }
- for _, volume := range config.NamedVolumes {
- dest := volume.Dest
- if _, ok := unifiedVolumes[dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, dest)
- }
- unifiedVolumes[dest] = volume
- }
-
- // If requested, add container init binary
- if config.Init {
- initPath := config.InitPath
- if initPath == "" {
- rtc, err := runtime.GetConfig()
- if err != nil {
- return nil, nil, err
- }
- initPath = rtc.Engine.InitPath
- }
- initMount, err := config.addContainerInitBinary(initPath)
- if err != nil {
- return nil, nil, err
- }
- if _, ok := unifiedMounts[initMount.Destination]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, "conflict with mount added by --init to %q", initMount.Destination)
- }
- unifiedMounts[initMount.Destination] = initMount
- }
-
- // Before superseding, we need to find volume mounts which conflict with
- // named volumes, and vice versa.
- // We'll delete the conflicts here as we supersede.
- for dest := range unifiedMounts {
- if _, ok := baseVolumes[dest]; ok {
- delete(baseVolumes, dest)
- }
- }
- for dest := range unifiedVolumes {
- if _, ok := baseMounts[dest]; ok {
- delete(baseMounts, dest)
- }
- }
-
- // Supersede volumes-from/image volumes with unified volumes from above.
- // This is an unconditional replacement.
- for dest, mount := range unifiedMounts {
- baseMounts[dest] = mount
- }
- for dest, volume := range unifiedVolumes {
- baseVolumes[dest] = volume
- }
-
- // If requested, add tmpfs filesystems for read-only containers.
- if config.Security.ReadOnlyRootfs && config.Security.ReadOnlyTmpfs {
- readonlyTmpfs := []string{"/tmp", "/var/tmp", "/run"}
- options := []string{"rw", "rprivate", "nosuid", "nodev", "tmpcopyup"}
- for _, dest := range readonlyTmpfs {
- if _, ok := baseMounts[dest]; ok {
- continue
- }
- if _, ok := baseVolumes[dest]; ok {
- continue
- }
- localOpts := options
- if dest == "/run" {
- localOpts = append(localOpts, "noexec", "size=65536k")
- } else {
- localOpts = append(localOpts, "exec")
- }
- baseMounts[dest] = spec.Mount{
- Destination: dest,
- Type: "tmpfs",
- Source: "tmpfs",
- Options: localOpts,
- }
- }
- }
-
- // Check for conflicts between named volumes and mounts
- for dest := range baseMounts {
- if _, ok := baseVolumes[dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, "conflict at mount destination %v", dest)
- }
- }
- for dest := range baseVolumes {
- if _, ok := baseMounts[dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, "conflict at mount destination %v", dest)
- }
- }
-
- // Final step: maps to arrays
- finalMounts := make([]spec.Mount, 0, len(baseMounts))
- for _, mount := range baseMounts {
- if mount.Type == TypeBind {
- absSrc, err := filepath.Abs(mount.Source)
- if err != nil {
- return nil, nil, errors.Wrapf(err, "error getting absolute path of %s", mount.Source)
- }
- mount.Source = absSrc
- }
- finalMounts = append(finalMounts, mount)
- }
- finalVolumes := make([]*libpod.ContainerNamedVolume, 0, len(baseVolumes))
- for _, volume := range baseVolumes {
- finalVolumes = append(finalVolumes, volume)
- }
-
- return finalMounts, finalVolumes, nil
-}
-
-// Parse volumes from - a set of containers whose volumes we will mount in.
-// Grab the containers, retrieve any user-created spec mounts and all named
-// volumes, and return a list of them.
-// Conflicts are resolved simply - the last container specified wins.
-// Container names may be suffixed by mount options after a colon.
-// TODO: We should clean these paths if possible
-func (config *CreateConfig) getVolumesFrom(runtime *libpod.Runtime) (map[string]spec.Mount, map[string]*libpod.ContainerNamedVolume, error) {
- // Both of these are maps of mount destination to mount type.
- // We ensure that each destination is only mounted to once in this way.
- finalMounts := make(map[string]spec.Mount)
- finalNamedVolumes := make(map[string]*libpod.ContainerNamedVolume)
-
- for _, vol := range config.VolumesFrom {
- var (
- options = []string{}
- err error
- splitVol = strings.SplitN(vol, ":", 2)
- )
- if len(splitVol) == 2 {
- splitOpts := strings.Split(splitVol[1], ",")
- for _, checkOpt := range splitOpts {
- switch checkOpt {
- case "z", "ro", "rw":
- // Do nothing, these are valid options
- default:
- return nil, nil, errors.Errorf("invalid options %q, can only specify 'ro', 'rw', and 'z'", splitVol[1])
- }
- }
-
- if options, err = parse.ValidateVolumeOpts(splitOpts); err != nil {
- return nil, nil, err
- }
- }
- ctr, err := runtime.LookupContainer(splitVol[0])
- if err != nil {
- return nil, nil, errors.Wrapf(err, "error looking up container %q for volumes-from", splitVol[0])
- }
-
- logrus.Debugf("Adding volumes from container %s", ctr.ID())
-
- // Look up the container's user volumes. This gets us the
- // destinations of all mounts the user added to the container.
- userVolumesArr := ctr.UserVolumes()
-
- // We're going to need to access them a lot, so convert to a map
- // to reduce looping.
- // We'll also use the map to indicate if we missed any volumes along the way.
- userVolumes := make(map[string]bool)
- for _, dest := range userVolumesArr {
- userVolumes[dest] = false
- }
-
- // Now we get the container's spec and loop through its volumes
- // and append them in if we can find them.
- spec := ctr.Spec()
- if spec == nil {
- return nil, nil, errors.Errorf("error retrieving container %s spec for volumes-from", ctr.ID())
- }
- for _, mnt := range spec.Mounts {
- if mnt.Type != TypeBind {
- continue
- }
- if _, exists := userVolumes[mnt.Destination]; exists {
- userVolumes[mnt.Destination] = true
-
- if len(options) != 0 {
- mnt.Options = options
- }
-
- if _, ok := finalMounts[mnt.Destination]; ok {
- logrus.Debugf("Overriding mount to %s with new mount from container %s", mnt.Destination, ctr.ID())
- }
- finalMounts[mnt.Destination] = mnt
- }
- }
-
- // We're done with the spec mounts. Add named volumes.
- // Add these unconditionally - none of them are automatically
- // part of the container, as some spec mounts are.
- namedVolumes := ctr.NamedVolumes()
- for _, namedVol := range namedVolumes {
- if _, exists := userVolumes[namedVol.Dest]; exists {
- userVolumes[namedVol.Dest] = true
- }
-
- if len(options) != 0 {
- namedVol.Options = options
- }
-
- if _, ok := finalMounts[namedVol.Dest]; ok {
- logrus.Debugf("Overriding named volume mount to %s with new named volume from container %s", namedVol.Dest, ctr.ID())
- }
- finalNamedVolumes[namedVol.Dest] = namedVol
- }
-
- // Check if we missed any volumes
- for volDest, found := range userVolumes {
- if !found {
- logrus.Warnf("Unable to match volume %s from container %s for volumes-from", volDest, ctr.ID())
- }
- }
- }
-
- return finalMounts, finalNamedVolumes, nil
-}
-
-// getMounts takes user-provided input from the --mount flag and creates OCI
-// spec mounts and Libpod named volumes.
-// podman run --mount type=bind,src=/etc/resolv.conf,target=/etc/resolv.conf ...
-// podman run --mount type=tmpfs,target=/dev/shm ...
-// podman run --mount type=volume,source=test-volume, ...
-func (config *CreateConfig) getMounts() (map[string]spec.Mount, map[string]*libpod.ContainerNamedVolume, error) {
- finalMounts := make(map[string]spec.Mount)
- finalNamedVolumes := make(map[string]*libpod.ContainerNamedVolume)
-
- errInvalidSyntax := errors.Errorf("incorrect mount format: should be --mount type=<bind|tmpfs|volume>,[src=<host-dir|volume-name>,]target=<ctr-dir>[,options]")
-
- // TODO(vrothberg): the manual parsing can be replaced with a regular expression
- // to allow a more robust parsing of the mount format and to give
- // precise errors regarding supported format versus supported options.
- for _, mount := range config.MountsFlag {
- arr := strings.SplitN(mount, ",", 2)
- if len(arr) < 2 {
- return nil, nil, errors.Wrapf(errInvalidSyntax, "%q", mount)
- }
- kv := strings.Split(arr[0], "=")
- // TODO: type is not explicitly required in Docker.
- // If not specified, it defaults to "volume".
- if len(kv) != 2 || kv[0] != "type" {
- return nil, nil, errors.Wrapf(errInvalidSyntax, "%q", mount)
- }
-
- tokens := strings.Split(arr[1], ",")
- switch kv[1] {
- case TypeBind:
- mount, err := getBindMount(tokens)
- if err != nil {
- return nil, nil, err
- }
- if _, ok := finalMounts[mount.Destination]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, mount.Destination)
- }
- finalMounts[mount.Destination] = mount
- case TypeTmpfs:
- mount, err := getTmpfsMount(tokens)
- if err != nil {
- return nil, nil, err
- }
- if _, ok := finalMounts[mount.Destination]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, mount.Destination)
- }
- finalMounts[mount.Destination] = mount
- case "volume":
- volume, err := getNamedVolume(tokens)
- if err != nil {
- return nil, nil, err
- }
- if _, ok := finalNamedVolumes[volume.Dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, volume.Dest)
- }
- finalNamedVolumes[volume.Dest] = volume
- default:
- return nil, nil, errors.Errorf("invalid filesystem type %q", kv[1])
- }
- }
-
- return finalMounts, finalNamedVolumes, nil
-}
-
-// Parse a single bind mount entry from the --mount flag.
-func getBindMount(args []string) (spec.Mount, error) {
- newMount := spec.Mount{
- Type: TypeBind,
- }
-
- var setSource, setDest, setRORW, setSuid, setDev, setExec, setRelabel bool
-
- for _, val := range args {
- kv := strings.SplitN(val, "=", 2)
- switch kv[0] {
- case "bind-nonrecursive":
- newMount.Options = append(newMount.Options, "bind")
- case "ro", "rw":
- if setRORW {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'ro' or 'rw' options more than once")
- }
- setRORW = true
- // Can be formatted as one of:
- // ro
- // ro=[true|false]
- // rw
- // rw=[true|false]
- switch len(kv) {
- case 1:
- newMount.Options = append(newMount.Options, kv[0])
- case 2:
- switch strings.ToLower(kv[1]) {
- case "true":
- newMount.Options = append(newMount.Options, kv[0])
- case "false":
- // Set the opposite only for rw
- // ro's opposite is the default
- if kv[0] == "rw" {
- newMount.Options = append(newMount.Options, "ro")
- }
- default:
- return newMount, errors.Wrapf(optionArgError, "%s must be set to true or false, instead received %q", kv[0], kv[1])
- }
- default:
- return newMount, errors.Wrapf(optionArgError, "badly formatted option %q", val)
- }
- case "nosuid", "suid":
- if setSuid {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'nosuid' and 'suid' options more than once")
- }
- setSuid = true
- newMount.Options = append(newMount.Options, kv[0])
- case "nodev", "dev":
- if setDev {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'nodev' and 'dev' options more than once")
- }
- setDev = true
- newMount.Options = append(newMount.Options, kv[0])
- case "noexec", "exec":
- if setExec {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'noexec' and 'exec' options more than once")
- }
- setExec = true
- newMount.Options = append(newMount.Options, kv[0])
- case "shared", "rshared", "private", "rprivate", "slave", "rslave", "unbindable", "runbindable", "Z", "z":
- newMount.Options = append(newMount.Options, kv[0])
- case "bind-propagation":
- if len(kv) == 1 {
- return newMount, errors.Wrapf(optionArgError, kv[0])
- }
- newMount.Options = append(newMount.Options, kv[1])
- case "src", "source":
- if len(kv) == 1 {
- return newMount, errors.Wrapf(optionArgError, kv[0])
- }
- if err := parse.ValidateVolumeHostDir(kv[1]); err != nil {
- return newMount, err
- }
- newMount.Source = kv[1]
- setSource = true
- case "target", "dst", "destination":
- if len(kv) == 1 {
- return newMount, errors.Wrapf(optionArgError, kv[0])
- }
- if err := parse.ValidateVolumeCtrDir(kv[1]); err != nil {
- return newMount, err
- }
- newMount.Destination = filepath.Clean(kv[1])
- setDest = true
- case "relabel":
- if setRelabel {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'relabel' option more than once")
- }
- setRelabel = true
- if len(kv) != 2 {
- return newMount, errors.Wrapf(util.ErrBadMntOption, "%s mount option must be 'private' or 'shared'", kv[0])
- }
- switch kv[1] {
- case "private":
- newMount.Options = append(newMount.Options, "z")
- case "shared":
- newMount.Options = append(newMount.Options, "Z")
- default:
- return newMount, errors.Wrapf(util.ErrBadMntOption, "%s mount option must be 'private' or 'shared'", kv[0])
- }
- default:
- return newMount, errors.Wrapf(util.ErrBadMntOption, kv[0])
- }
- }
-
- if !setDest {
- return newMount, noDestError
- }
-
- if !setSource {
- newMount.Source = newMount.Destination
- }
-
- options, err := parse.ValidateVolumeOpts(newMount.Options)
- if err != nil {
- return newMount, err
- }
- newMount.Options = options
- return newMount, nil
-}
-
-// Parse a single tmpfs mount entry from the --mount flag
-func getTmpfsMount(args []string) (spec.Mount, error) {
- newMount := spec.Mount{
- Type: TypeTmpfs,
- Source: TypeTmpfs,
- }
-
- var setDest, setRORW, setSuid, setDev, setExec, setTmpcopyup bool
-
- for _, val := range args {
- kv := strings.SplitN(val, "=", 2)
- switch kv[0] {
- case "tmpcopyup", "notmpcopyup":
- if setTmpcopyup {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'tmpcopyup' and 'notmpcopyup' options more than once")
- }
- setTmpcopyup = true
- newMount.Options = append(newMount.Options, kv[0])
- case "ro", "rw":
- if setRORW {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'ro' and 'rw' options more than once")
- }
- setRORW = true
- newMount.Options = append(newMount.Options, kv[0])
- case "nosuid", "suid":
- if setSuid {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'nosuid' and 'suid' options more than once")
- }
- setSuid = true
- newMount.Options = append(newMount.Options, kv[0])
- case "nodev", "dev":
- if setDev {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'nodev' and 'dev' options more than once")
- }
- setDev = true
- newMount.Options = append(newMount.Options, kv[0])
- case "noexec", "exec":
- if setExec {
- return newMount, errors.Wrapf(optionArgError, "cannot pass 'noexec' and 'exec' options more than once")
- }
- setExec = true
- newMount.Options = append(newMount.Options, kv[0])
- case "tmpfs-mode":
- if len(kv) == 1 {
- return newMount, errors.Wrapf(optionArgError, kv[0])
- }
- newMount.Options = append(newMount.Options, fmt.Sprintf("mode=%s", kv[1]))
- case "tmpfs-size":
- if len(kv) == 1 {
- return newMount, errors.Wrapf(optionArgError, kv[0])
- }
- newMount.Options = append(newMount.Options, fmt.Sprintf("size=%s", kv[1]))
- case "src", "source":
- return newMount, errors.Errorf("source is not supported with tmpfs mounts")
- case "target", "dst", "destination":
- if len(kv) == 1 {
- return newMount, errors.Wrapf(optionArgError, kv[0])
- }
- if err := parse.ValidateVolumeCtrDir(kv[1]); err != nil {
- return newMount, err
- }
- newMount.Destination = filepath.Clean(kv[1])
- setDest = true
- default:
- return newMount, errors.Wrapf(util.ErrBadMntOption, kv[0])
- }
- }
-
- if !setDest {
- return newMount, noDestError
- }
-
- return newMount, nil
-}
-
-// Parse a single volume mount entry from the --mount flag.
-// Note that the volume-label option for named volumes is currently NOT supported.
-// TODO: add support for --volume-label
-func getNamedVolume(args []string) (*libpod.ContainerNamedVolume, error) {
- newVolume := new(libpod.ContainerNamedVolume)
-
- var setSource, setDest, setRORW, setSuid, setDev, setExec bool
-
- for _, val := range args {
- kv := strings.SplitN(val, "=", 2)
- switch kv[0] {
- case "ro", "rw":
- if setRORW {
- return nil, errors.Wrapf(optionArgError, "cannot pass 'ro' and 'rw' options more than once")
- }
- setRORW = true
- newVolume.Options = append(newVolume.Options, kv[0])
- case "nosuid", "suid":
- if setSuid {
- return nil, errors.Wrapf(optionArgError, "cannot pass 'nosuid' and 'suid' options more than once")
- }
- setSuid = true
- newVolume.Options = append(newVolume.Options, kv[0])
- case "nodev", "dev":
- if setDev {
- return nil, errors.Wrapf(optionArgError, "cannot pass 'nodev' and 'dev' options more than once")
- }
- setDev = true
- newVolume.Options = append(newVolume.Options, kv[0])
- case "noexec", "exec":
- if setExec {
- return nil, errors.Wrapf(optionArgError, "cannot pass 'noexec' and 'exec' options more than once")
- }
- setExec = true
- newVolume.Options = append(newVolume.Options, kv[0])
- case "volume-label":
- return nil, errors.Errorf("the --volume-label option is not presently implemented")
- case "src", "source":
- if len(kv) == 1 {
- return nil, errors.Wrapf(optionArgError, kv[0])
- }
- newVolume.Name = kv[1]
- setSource = true
- case "target", "dst", "destination":
- if len(kv) == 1 {
- return nil, errors.Wrapf(optionArgError, kv[0])
- }
- if err := parse.ValidateVolumeCtrDir(kv[1]); err != nil {
- return nil, err
- }
- newVolume.Dest = filepath.Clean(kv[1])
- setDest = true
- default:
- return nil, errors.Wrapf(util.ErrBadMntOption, kv[0])
- }
- }
-
- if !setSource {
- return nil, errors.Errorf("must set source volume")
- }
- if !setDest {
- return nil, noDestError
- }
-
- return newVolume, nil
-}
-
-func (config *CreateConfig) getVolumeMounts() (map[string]spec.Mount, map[string]*libpod.ContainerNamedVolume, error) {
- mounts := make(map[string]spec.Mount)
- volumes := make(map[string]*libpod.ContainerNamedVolume)
-
- volumeFormatErr := errors.Errorf("incorrect volume format, should be [host-dir:]ctr-dir[:option]")
-
- for _, vol := range config.Volumes {
- var (
- options []string
- src string
- dest string
- err error
- )
-
- splitVol := strings.Split(vol, ":")
- if len(splitVol) > 3 {
- return nil, nil, errors.Wrapf(volumeFormatErr, vol)
- }
-
- src = splitVol[0]
- if len(splitVol) == 1 {
- // This is an anonymous named volume. Only thing given
- // is destination.
- // Name/source will be blank, and populated by libpod.
- src = ""
- dest = splitVol[0]
- } else if len(splitVol) > 1 {
- dest = splitVol[1]
- }
- if len(splitVol) > 2 {
- if options, err = parse.ValidateVolumeOpts(strings.Split(splitVol[2], ",")); err != nil {
- return nil, nil, err
- }
- }
-
- // Do not check source dir for anonymous volumes
- if len(splitVol) > 1 {
- if err := parse.ValidateVolumeHostDir(src); err != nil {
- return nil, nil, err
- }
- }
- if err := parse.ValidateVolumeCtrDir(dest); err != nil {
- return nil, nil, err
- }
-
- cleanDest := filepath.Clean(dest)
-
- if strings.HasPrefix(src, "/") || strings.HasPrefix(src, ".") {
- // This is not a named volume
- newMount := spec.Mount{
- Destination: cleanDest,
- Type: string(TypeBind),
- Source: src,
- Options: options,
- }
- if _, ok := mounts[newMount.Destination]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, newMount.Destination)
- }
- mounts[newMount.Destination] = newMount
- } else {
- // This is a named volume
- newNamedVol := new(libpod.ContainerNamedVolume)
- newNamedVol.Name = src
- newNamedVol.Dest = cleanDest
- newNamedVol.Options = options
-
- if _, ok := volumes[newNamedVol.Dest]; ok {
- return nil, nil, errors.Wrapf(errDuplicateDest, newNamedVol.Dest)
- }
- volumes[newNamedVol.Dest] = newNamedVol
- }
-
- logrus.Debugf("User mount %s:%s options %v", src, dest, options)
- }
-
- return mounts, volumes, nil
-}
-
-// Get mounts for container's image volumes
-func (config *CreateConfig) getImageVolumes() (map[string]spec.Mount, map[string]*libpod.ContainerNamedVolume, error) {
- mounts := make(map[string]spec.Mount)
- volumes := make(map[string]*libpod.ContainerNamedVolume)
-
- if config.ImageVolumeType == "ignore" {
- return mounts, volumes, nil
- }
-
- for vol := range config.BuiltinImgVolumes {
- cleanDest := filepath.Clean(vol)
- logrus.Debugf("Adding image volume at %s", cleanDest)
- if config.ImageVolumeType == "tmpfs" {
- // Tmpfs image volumes are handled as mounts
- mount := spec.Mount{
- Destination: cleanDest,
- Source: TypeTmpfs,
- Type: TypeTmpfs,
- Options: []string{"rprivate", "rw", "nodev", "exec"},
- }
- mounts[cleanDest] = mount
- } else {
- // Anonymous volumes have no name.
- namedVolume := new(libpod.ContainerNamedVolume)
- namedVolume.Options = []string{"rprivate", "rw", "nodev", "exec"}
- namedVolume.Dest = cleanDest
- volumes[cleanDest] = namedVolume
- }
- }
-
- return mounts, volumes, nil
-}
-
-// GetTmpfsMounts creates spec.Mount structs for user-requested tmpfs mounts
-func (config *CreateConfig) getTmpfsMounts() (map[string]spec.Mount, error) {
- m := make(map[string]spec.Mount)
- for _, i := range config.Tmpfs {
- // Default options if nothing passed
- var options []string
- spliti := strings.Split(i, ":")
- destPath := spliti[0]
- if err := parse.ValidateVolumeCtrDir(spliti[0]); err != nil {
- return nil, err
- }
- if len(spliti) > 1 {
- options = strings.Split(spliti[1], ",")
- }
-
- if _, ok := m[destPath]; ok {
- return nil, errors.Wrapf(errDuplicateDest, destPath)
- }
-
- mount := spec.Mount{
- Destination: filepath.Clean(destPath),
- Type: string(TypeTmpfs),
- Options: options,
- Source: string(TypeTmpfs),
- }
- m[destPath] = mount
- }
- return m, nil
-}
-
-// AddContainerInitBinary adds the init binary specified by path iff the
-// container will run in a private PID namespace that is not shared with the
-// host or another pre-existing container, where an init-like process is
-// already running.
-//
-// Note that AddContainerInitBinary prepends "/dev/init" "--" to the command
-// to execute the bind-mounted binary as PID 1.
-func (config *CreateConfig) addContainerInitBinary(path string) (spec.Mount, error) {
- mount := spec.Mount{
- Destination: "/dev/init",
- Type: TypeBind,
- Source: path,
- Options: []string{TypeBind, "ro"},
- }
-
- if path == "" {
- return mount, fmt.Errorf("please specify a path to the container-init binary")
- }
- if !config.Pid.PidMode.IsPrivate() {
- return mount, fmt.Errorf("cannot add init binary as PID 1 (PID namespace isn't private)")
- }
- if config.Systemd {
- return mount, fmt.Errorf("cannot use container-init binary with systemd")
- }
- if _, err := os.Stat(path); os.IsNotExist(err) {
- return mount, errors.Wrap(err, "container-init binary not found on the host")
- }
- config.Command = append([]string{"/dev/init", "--"}, config.Command...)
- return mount, nil
-}
-
-// Supersede existing mounts in the spec with new, user-specified mounts.
-// TODO: Should we unmount subtree mounts? E.g., if /tmp/ is mounted by
-// one mount, and we already have /tmp/a and /tmp/b, should we remove
-// the /tmp/a and /tmp/b mounts in favor of the more general /tmp?
-func SupercedeUserMounts(mounts []spec.Mount, configMount []spec.Mount) []spec.Mount {
- if len(mounts) > 0 {
- // If we have overlappings mounts, remove them from the spec in favor of
- // the user-added volume mounts
- destinations := make(map[string]bool)
- for _, mount := range mounts {
- destinations[path.Clean(mount.Destination)] = true
- }
- // Copy all mounts from spec to defaultMounts, except for
- // - mounts overridden by a user supplied mount;
- // - all mounts under /dev if a user supplied /dev is present;
- mountDev := destinations["/dev"]
- for _, mount := range configMount {
- if _, ok := destinations[path.Clean(mount.Destination)]; !ok {
- if mountDev && strings.HasPrefix(mount.Destination, "/dev/") {
- // filter out everything under /dev if /dev is user-mounted
- continue
- }
-
- logrus.Debugf("Adding mount %s", mount.Destination)
- mounts = append(mounts, mount)
- }
- }
- return mounts
- }
- return configMount
-}
-
-// Ensure mount options on all mounts are correct
-func InitFSMounts(mounts []spec.Mount) error {
- for i, m := range mounts {
- switch {
- case m.Type == TypeBind:
- opts, err := util.ProcessOptions(m.Options, false, m.Source)
- if err != nil {
- return err
- }
- mounts[i].Options = opts
- case m.Type == TypeTmpfs && filepath.Clean(m.Destination) != "/dev":
- opts, err := util.ProcessOptions(m.Options, true, "")
- if err != nil {
- return err
- }
- mounts[i].Options = opts
- }
- }
- return nil
-}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-09-27 15:35:34 +0000