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author | OpenShift Merge Robot <openshift-merge-robot@users.noreply.github.com> | 2020-12-01 15:30:06 +0100 |
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committer | GitHub <noreply@github.com> | 2020-12-01 15:30:06 +0100 |
commit | e3f0b7db7508f1e1ecfdb23adb53531c89a29b99 (patch) | |
tree | c14bd42ae7fe6fd90679455efe932bd37d1f7a24 /pkg/spec/storage.go | |
parent | 1316b2927be632ff717d9f7fd6a1633198c1ccaf (diff) | |
parent | f62a356515e387b0bbcf1f08b4831d139c2039b7 (diff) | |
download | podman-e3f0b7db7508f1e1ecfdb23adb53531c89a29b99.tar.gz podman-e3f0b7db7508f1e1ecfdb23adb53531c89a29b99.tar.bz2 podman-e3f0b7db7508f1e1ecfdb23adb53531c89a29b99.zip |
Merge pull request #8400 from rhatdan/varlink
Remove varlink support from podman
Diffstat (limited to 'pkg/spec/storage.go')
-rw-r--r-- | pkg/spec/storage.go | 875 |
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 -} |