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-rw-r--r--pkg/specgen/container_validate.go8
-rw-r--r--pkg/specgen/generate/config_linux_cgo.go3
-rw-r--r--pkg/specgen/generate/container.go36
-rw-r--r--pkg/specgen/generate/container_create.go52
-rw-r--r--pkg/specgen/generate/namespaces.go25
-rw-r--r--pkg/specgen/generate/oci.go59
-rw-r--r--pkg/specgen/generate/pod_create.go7
-rw-r--r--pkg/specgen/generate/storage.go303
-rw-r--r--pkg/specgen/namespaces.go53
-rw-r--r--pkg/specgen/pod_validate.go2
-rw-r--r--pkg/specgen/specgen.go28
11 files changed, 514 insertions, 62 deletions
diff --git a/pkg/specgen/container_validate.go b/pkg/specgen/container_validate.go
index df9c77cbc..94e456c52 100644
--- a/pkg/specgen/container_validate.go
+++ b/pkg/specgen/container_validate.go
@@ -14,7 +14,7 @@ var (
// SystemDValues describes the only values that SystemD can be
SystemDValues = []string{"true", "false", "always"}
// ImageVolumeModeValues describes the only values that ImageVolumeMode can be
- ImageVolumeModeValues = []string{"ignore", "tmpfs", "bind"}
+ ImageVolumeModeValues = []string{"ignore", "tmpfs", "anonymous"}
)
func exclusiveOptions(opt1, opt2 string) error {
@@ -34,7 +34,7 @@ func (s *SpecGenerator) Validate() error {
}
// Cannot set hostname and utsns
if len(s.ContainerBasicConfig.Hostname) > 0 && !s.ContainerBasicConfig.UtsNS.IsPrivate() {
- return errors.Wrap(ErrInvalidSpecConfig, "cannot set hostname when creating an UTS namespace")
+ return errors.Wrap(ErrInvalidSpecConfig, "cannot set hostname when running in the host UTS namespace")
}
// systemd values must be true, false, or always
if len(s.ContainerBasicConfig.Systemd) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerBasicConfig.Systemd), SystemDValues) {
@@ -54,7 +54,7 @@ func (s *SpecGenerator) Validate() error {
}
// shmsize conflicts with IPC namespace
if s.ContainerStorageConfig.ShmSize != nil && !s.ContainerStorageConfig.IpcNS.IsPrivate() {
- return errors.New("cannot set shmsize when creating an IPC namespace")
+ return errors.New("cannot set shmsize when running in the host IPC Namespace")
}
//
@@ -129,7 +129,7 @@ func (s *SpecGenerator) Validate() error {
if err := s.CgroupNS.validate(); err != nil {
return err
}
- if err := s.UserNS.validate(); err != nil {
+ if err := validateUserNS(&s.UserNS); err != nil {
return err
}
diff --git a/pkg/specgen/generate/config_linux_cgo.go b/pkg/specgen/generate/config_linux_cgo.go
index b06ef5c9a..5d629a6e6 100644
--- a/pkg/specgen/generate/config_linux_cgo.go
+++ b/pkg/specgen/generate/config_linux_cgo.go
@@ -24,6 +24,9 @@ func getSeccompConfig(s *specgen.SpecGenerator, configSpec *spec.Spec, img *imag
}
if scp == seccomp.PolicyImage {
+ if img == nil {
+ return nil, errors.New("cannot read seccomp profile without a valid image")
+ }
labels, err := img.Labels(context.Background())
if err != nil {
return nil, err
diff --git a/pkg/specgen/generate/container.go b/pkg/specgen/generate/container.go
index de3239fda..b27dd1cc2 100644
--- a/pkg/specgen/generate/container.go
+++ b/pkg/specgen/generate/container.go
@@ -8,19 +8,27 @@ import (
envLib "github.com/containers/libpod/pkg/env"
"github.com/containers/libpod/pkg/signal"
"github.com/containers/libpod/pkg/specgen"
- "github.com/pkg/errors"
"golang.org/x/sys/unix"
)
func CompleteSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerator) error {
- var appendEntryPoint bool
+ // If a rootfs is used, then there is no image data
+ if s.ContainerStorageConfig.Rootfs != "" {
+ return nil
+ }
- // TODO add support for raw rootfs
newImage, err := r.ImageRuntime().NewFromLocal(s.Image)
if err != nil {
return err
}
+ if s.HealthConfig == nil {
+ s.HealthConfig, err = newImage.GetHealthCheck(ctx)
+ if err != nil {
+ return err
+ }
+ }
+
// Image stop signal
if s.StopSignal == nil {
stopSignal, err := newImage.StopSignal(ctx)
@@ -96,28 +104,6 @@ func CompleteSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerat
}
s.Annotations = annotations
- // entrypoint
- entrypoint, err := newImage.Entrypoint(ctx)
- if err != nil {
- return err
- }
- if len(s.Entrypoint) < 1 && len(entrypoint) > 0 {
- appendEntryPoint = true
- s.Entrypoint = entrypoint
- }
- command, err := newImage.Cmd(ctx)
- if err != nil {
- return err
- }
- if len(s.Command) < 1 && len(command) > 0 {
- if appendEntryPoint {
- s.Command = entrypoint
- }
- s.Command = append(s.Command, command...)
- }
- if len(s.Command) < 1 && len(s.Entrypoint) < 1 {
- return errors.Errorf("No command provided or as CMD or ENTRYPOINT in this image")
- }
// workdir
workingDir, err := newImage.WorkingDir(ctx)
if err != nil {
diff --git a/pkg/specgen/generate/container_create.go b/pkg/specgen/generate/container_create.go
index 1be77d315..bb84f0618 100644
--- a/pkg/specgen/generate/container_create.go
+++ b/pkg/specgen/generate/container_create.go
@@ -7,6 +7,7 @@ import (
"github.com/containers/common/pkg/config"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/libpod/define"
+ "github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/pkg/specgen"
"github.com/containers/storage"
"github.com/pkg/errors"
@@ -14,10 +15,7 @@ import (
)
// MakeContainer creates a container based on the SpecGenerator
-func MakeContainer(rt *libpod.Runtime, s *specgen.SpecGenerator) (*libpod.Container, error) {
- if err := s.Validate(); err != nil {
- return nil, errors.Wrap(err, "invalid config provided")
- }
+func MakeContainer(ctx context.Context, rt *libpod.Runtime, s *specgen.SpecGenerator) (*libpod.Container, error) {
rtc, err := rt.GetConfig()
if err != nil {
return nil, err
@@ -77,31 +75,47 @@ func MakeContainer(rt *libpod.Runtime, s *specgen.SpecGenerator) (*libpod.Contai
s.CgroupNS = defaultNS
}
- options, err := createContainerOptions(rt, s, pod)
+ options := []libpod.CtrCreateOption{}
+
+ var newImage *image.Image
+ if s.Rootfs != "" {
+ options = append(options, libpod.WithRootFS(s.Rootfs))
+ } else {
+ newImage, err = rt.ImageRuntime().NewFromLocal(s.Image)
+ if err != nil {
+ return nil, err
+ }
+ options = append(options, libpod.WithRootFSFromImage(newImage.ID(), s.Image, s.RawImageName))
+ }
+ if err := s.Validate(); err != nil {
+ return nil, errors.Wrap(err, "invalid config provided")
+ }
+
+ finalMounts, finalVolumes, err := finalizeMounts(ctx, s, rt, rtc, newImage)
if err != nil {
return nil, err
}
- podmanPath, err := os.Executable()
+ opts, err := createContainerOptions(rt, s, pod, finalVolumes)
if err != nil {
return nil, err
}
- options = append(options, createExitCommandOption(s, rt.StorageConfig(), rtc, podmanPath))
- newImage, err := rt.ImageRuntime().NewFromLocal(s.Image)
+ options = append(options, opts...)
+
+ podmanPath, err := os.Executable()
if err != nil {
return nil, err
}
+ options = append(options, createExitCommandOption(s, rt.StorageConfig(), rtc, podmanPath))
- options = append(options, libpod.WithRootFSFromImage(newImage.ID(), s.Image, s.RawImageName))
-
- runtimeSpec, err := SpecGenToOCI(s, rt, newImage)
+ runtimeSpec, err := SpecGenToOCI(ctx, s, rt, rtc, newImage, finalMounts)
if err != nil {
return nil, err
}
- return rt.NewContainer(context.Background(), runtimeSpec, options...)
+ return rt.NewContainer(ctx, runtimeSpec, options...)
}
-func createContainerOptions(rt *libpod.Runtime, s *specgen.SpecGenerator, pod *libpod.Pod) ([]libpod.CtrCreateOption, error) {
+func createContainerOptions(rt *libpod.Runtime, s *specgen.SpecGenerator, pod *libpod.Pod, volumes []*specgen.NamedVolume) ([]libpod.CtrCreateOption, error) {
var options []libpod.CtrCreateOption
var err error
@@ -128,21 +142,21 @@ func createContainerOptions(rt *libpod.Runtime, s *specgen.SpecGenerator, pod *l
for _, mount := range s.Mounts {
destinations = append(destinations, mount.Destination)
}
- for _, volume := range s.Volumes {
+ for _, volume := range volumes {
destinations = append(destinations, volume.Dest)
}
options = append(options, libpod.WithUserVolumes(destinations))
- if len(s.Volumes) != 0 {
- var volumes []*libpod.ContainerNamedVolume
- for _, v := range s.Volumes {
- volumes = append(volumes, &libpod.ContainerNamedVolume{
+ if len(volumes) != 0 {
+ var vols []*libpod.ContainerNamedVolume
+ for _, v := range volumes {
+ vols = append(vols, &libpod.ContainerNamedVolume{
Name: v.Name,
Dest: v.Dest,
Options: v.Options,
})
}
- options = append(options, libpod.WithNamedVolumes(volumes))
+ options = append(options, libpod.WithNamedVolumes(vols))
}
if len(s.Command) != 0 {
diff --git a/pkg/specgen/generate/namespaces.go b/pkg/specgen/generate/namespaces.go
index 4ec1e859c..a8b74b504 100644
--- a/pkg/specgen/generate/namespaces.go
+++ b/pkg/specgen/generate/namespaces.go
@@ -10,6 +10,7 @@ import (
"github.com/containers/libpod/pkg/cgroups"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/specgen"
+ "github.com/containers/libpod/pkg/util"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/opencontainers/runtime-tools/generate"
"github.com/pkg/errors"
@@ -26,7 +27,7 @@ func GetDefaultNamespaceMode(nsType string, cfg *config.Config, pod *libpod.Pod)
nsType = strings.ToLower(nsType)
// If the pod is not nil - check shared namespaces
- if pod != nil {
+ if pod != nil && pod.HasInfraContainer() {
podMode := false
switch {
case nsType == "pid" && pod.SharesPID():
@@ -58,8 +59,7 @@ func GetDefaultNamespaceMode(nsType string, cfg *config.Config, pod *libpod.Pod)
case "uts":
return specgen.ParseNamespace(cfg.Containers.UTSNS)
case "user":
- // TODO: This may not work for --userns=auto
- return specgen.ParseNamespace(cfg.Containers.UserNS)
+ return specgen.ParseUserNamespace(cfg.Containers.UserNS)
case "net":
ns, _, err := specgen.ParseNetworkNamespace(cfg.Containers.NetNS)
return ns, err
@@ -176,6 +176,13 @@ func GenerateNamespaceOptions(s *specgen.SpecGenerator, rt *libpod.Runtime, pod
// User
switch s.UserNS.NSMode {
+ case specgen.KeepID:
+ if rootless.IsRootless() {
+ s.User = ""
+ } else {
+ // keep-id as root doesn't need a user namespace
+ s.UserNS.NSMode = specgen.Host
+ }
case specgen.FromPod:
if pod == nil || infraCtr == nil {
return nil, errNoInfra
@@ -379,6 +386,18 @@ func specConfigureNamespaces(s *specgen.SpecGenerator, g *generate.Generator, rt
if err := g.RemoveLinuxNamespace(string(spec.UserNamespace)); err != nil {
return err
}
+ case specgen.KeepID:
+ var (
+ err error
+ uid, gid int
+ )
+ s.IDMappings, uid, gid, err = util.GetKeepIDMapping()
+ if err != nil {
+ return err
+ }
+ g.SetProcessUID(uint32(uid))
+ g.SetProcessGID(uint32(gid))
+ fallthrough
case specgen.Private:
if err := g.AddOrReplaceLinuxNamespace(string(spec.UserNamespace), ""); err != nil {
return err
diff --git a/pkg/specgen/generate/oci.go b/pkg/specgen/generate/oci.go
index 8ca95016e..87262684e 100644
--- a/pkg/specgen/generate/oci.go
+++ b/pkg/specgen/generate/oci.go
@@ -1,8 +1,10 @@
package generate
import (
+ "context"
"strings"
+ "github.com/containers/common/pkg/config"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/pkg/rootless"
@@ -10,6 +12,7 @@ import (
"github.com/opencontainers/runc/libcontainer/user"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/opencontainers/runtime-tools/generate"
+ "github.com/pkg/errors"
)
func addRlimits(s *specgen.SpecGenerator, g *generate.Generator) error {
@@ -48,7 +51,51 @@ func addRlimits(s *specgen.SpecGenerator, g *generate.Generator) error {
return nil
}
-func SpecGenToOCI(s *specgen.SpecGenerator, rt *libpod.Runtime, newImage *image.Image) (*spec.Spec, error) {
+// Produce the final command for the container.
+func makeCommand(ctx context.Context, s *specgen.SpecGenerator, img *image.Image, rtc *config.Config) ([]string, error) {
+ finalCommand := []string{}
+
+ entrypoint := s.Entrypoint
+ if len(entrypoint) == 0 && img != nil {
+ newEntry, err := img.Entrypoint(ctx)
+ if err != nil {
+ return nil, err
+ }
+ entrypoint = newEntry
+ }
+
+ finalCommand = append(finalCommand, entrypoint...)
+
+ command := s.Command
+ if len(command) == 0 && img != nil {
+ newCmd, err := img.Cmd(ctx)
+ if err != nil {
+ return nil, err
+ }
+ command = newCmd
+ }
+
+ finalCommand = append(finalCommand, command...)
+
+ if len(finalCommand) == 0 {
+ return nil, errors.Errorf("no command or entrypoint provided, and no CMD or ENTRYPOINT from image")
+ }
+
+ if s.Init {
+ initPath := s.InitPath
+ if initPath == "" && rtc != nil {
+ initPath = rtc.Engine.InitPath
+ }
+ if initPath == "" {
+ return nil, errors.Errorf("no path to init binary found but container requested an init")
+ }
+ finalCommand = append([]string{initPath, "--"}, finalCommand...)
+ }
+
+ return finalCommand, nil
+}
+
+func SpecGenToOCI(ctx context.Context, s *specgen.SpecGenerator, rt *libpod.Runtime, rtc *config.Config, newImage *image.Image, mounts []spec.Mount) (*spec.Spec, error) {
var (
inUserNS bool
)
@@ -173,7 +220,13 @@ func SpecGenToOCI(s *specgen.SpecGenerator, rt *libpod.Runtime, newImage *image.
g.AddMount(cgroupMnt)
}
g.SetProcessCwd(s.WorkDir)
- g.SetProcessArgs(s.Command)
+
+ finalCmd, err := makeCommand(ctx, s, newImage, rtc)
+ if err != nil {
+ return nil, err
+ }
+ g.SetProcessArgs(finalCmd)
+
g.SetProcessTerminal(s.Terminal)
for key, val := range s.Annotations {
@@ -227,7 +280,7 @@ func SpecGenToOCI(s *specgen.SpecGenerator, rt *libpod.Runtime, newImage *image.
}
// BIND MOUNTS
- configSpec.Mounts = SupercedeUserMounts(s.Mounts, configSpec.Mounts)
+ configSpec.Mounts = SupercedeUserMounts(mounts, configSpec.Mounts)
// Process mounts to ensure correct options
if err := InitFSMounts(configSpec.Mounts); err != nil {
return nil, err
diff --git a/pkg/specgen/generate/pod_create.go b/pkg/specgen/generate/pod_create.go
index 292f9b155..babfba9bc 100644
--- a/pkg/specgen/generate/pod_create.go
+++ b/pkg/specgen/generate/pod_create.go
@@ -46,6 +46,13 @@ func createPodOptions(p *specgen.PodSpecGenerator) ([]libpod.PodCreateOption, er
if len(p.HostAdd) > 0 {
options = append(options, libpod.WithPodHosts(p.HostAdd))
}
+ if len(p.DNSServer) > 0 {
+ var dnsServers []string
+ for _, d := range p.DNSServer {
+ dnsServers = append(dnsServers, d.String())
+ }
+ options = append(options, libpod.WithPodDNS(dnsServers))
+ }
if len(p.DNSOption) > 0 {
options = append(options, libpod.WithPodDNSOption(p.DNSOption))
}
diff --git a/pkg/specgen/generate/storage.go b/pkg/specgen/generate/storage.go
index 7650e4e9a..241c9adeb 100644
--- a/pkg/specgen/generate/storage.go
+++ b/pkg/specgen/generate/storage.go
@@ -1,12 +1,20 @@
package generate
import (
+ "context"
+ "fmt"
+ "os"
"path"
"path/filepath"
"strings"
+ "github.com/containers/common/pkg/config"
+ "github.com/containers/libpod/libpod"
+ "github.com/containers/libpod/libpod/image"
+ "github.com/containers/libpod/pkg/specgen"
"github.com/containers/libpod/pkg/util"
spec "github.com/opencontainers/runtime-spec/specs-go"
+ "github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
@@ -20,6 +28,301 @@ const (
TypeTmpfs = "tmpfs"
)
+var (
+ errDuplicateDest = errors.Errorf("duplicate mount destination")
+)
+
+// Produce final mounts and named volumes for a container
+func finalizeMounts(ctx context.Context, s *specgen.SpecGenerator, rt *libpod.Runtime, rtc *config.Config, img *image.Image) ([]spec.Mount, []*specgen.NamedVolume, error) {
+ // Get image volumes
+ baseMounts, baseVolumes, err := getImageVolumes(ctx, img, s)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ // Get volumes-from mounts
+ volFromMounts, volFromVolumes, err := getVolumesFrom(s.VolumesFrom, rt)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ // Supercede from --volumes-from.
+ for dest, mount := range volFromMounts {
+ baseMounts[dest] = mount
+ }
+ for dest, volume := range volFromVolumes {
+ baseVolumes[dest] = volume
+ }
+
+ // Need to make map forms of specgen mounts/volumes.
+ unifiedMounts := map[string]spec.Mount{}
+ unifiedVolumes := map[string]*specgen.NamedVolume{}
+ for _, m := range s.Mounts {
+ if _, ok := unifiedMounts[m.Destination]; ok {
+ return nil, nil, errors.Wrapf(errDuplicateDest, "conflict in specified mounts - multiple mounts at %q", m.Destination)
+ }
+ unifiedMounts[m.Destination] = m
+ }
+ for _, v := range s.Volumes {
+ if _, ok := unifiedVolumes[v.Dest]; ok {
+ return nil, nil, errors.Wrapf(errDuplicateDest, "conflict in specified volumes - multiple volumes at %q", v.Dest)
+ }
+ unifiedVolumes[v.Dest] = v
+ }
+
+ // If requested, add container init binary
+ if s.Init {
+ initPath := s.InitPath
+ if initPath == "" && rtc != nil {
+ initPath = rtc.Engine.InitPath
+ }
+ initMount, err := addContainerInitBinary(s, 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
+ }
+
+ // TODO: Investigate moving readonlyTmpfs into here. Would be more
+ // correct.
+
+ // 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([]*specgen.NamedVolume, 0, len(baseVolumes))
+ for _, volume := range baseVolumes {
+ finalVolumes = append(finalVolumes, volume)
+ }
+
+ return finalMounts, finalVolumes, nil
+}
+
+// Get image volumes from the given image
+func getImageVolumes(ctx context.Context, img *image.Image, s *specgen.SpecGenerator) (map[string]spec.Mount, map[string]*specgen.NamedVolume, error) {
+ mounts := make(map[string]spec.Mount)
+ volumes := make(map[string]*specgen.NamedVolume)
+
+ mode := strings.ToLower(s.ImageVolumeMode)
+
+ // Image may be nil (rootfs in use), or image volume mode may be ignore.
+ if img == nil || mode == "ignore" {
+ return mounts, volumes, nil
+ }
+
+ inspect, err := img.InspectNoSize(ctx)
+ if err != nil {
+ return nil, nil, errors.Wrapf(err, "error inspecting image to get image volumes")
+ }
+ for volume := range inspect.Config.Volumes {
+ logrus.Debugf("Image has volume at %q", volume)
+ cleanDest := filepath.Clean(volume)
+ switch mode {
+ case "", "anonymous":
+ // Anonymous volumes have no name.
+ newVol := new(specgen.NamedVolume)
+ newVol.Dest = cleanDest
+ newVol.Options = []string{"rprivate", "rw", "nodev", "exec"}
+ volumes[cleanDest] = newVol
+ logrus.Debugf("Adding anonymous image volume at %q", cleanDest)
+ case "tmpfs":
+ mount := spec.Mount{
+ Destination: cleanDest,
+ Source: TypeTmpfs,
+ Type: TypeTmpfs,
+ Options: []string{"rprivate", "rw", "nodev", "exec"},
+ }
+ mounts[cleanDest] = mount
+ logrus.Debugf("Adding tmpfs image volume at %q", cleanDest)
+ }
+ }
+
+ return mounts, volumes, nil
+}
+
+func getVolumesFrom(volumesFrom []string, runtime *libpod.Runtime) (map[string]spec.Mount, map[string]*specgen.NamedVolume, error) {
+ finalMounts := make(map[string]spec.Mount)
+ finalNamedVolumes := make(map[string]*specgen.NamedVolume)
+
+ for _, volume := range volumesFrom {
+ var options []string
+
+ splitVol := strings.SplitN(volume, ":", 2)
+ if len(splitVol) == 2 {
+ splitOpts := strings.Split(splitVol[1], ",")
+ for _, opt := range splitOpts {
+ setRORW := false
+ setZ := false
+ switch opt {
+ case "z":
+ if setZ {
+ return nil, nil, errors.Errorf("cannot set :z more than once in mount options")
+ }
+ setZ = true
+ case "ro", "rw":
+ if setRORW {
+ return nil, nil, errors.Errorf("cannot set ro or rw options more than once")
+ }
+ setRORW = true
+ default:
+ return nil, nil, errors.Errorf("invalid option %q specified - volumes from another container can only use z,ro,rw options", opt)
+ }
+ }
+ options = splitOpts
+ }
+
+ 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())
+ }
+
+ newVol := new(specgen.NamedVolume)
+ newVol.Dest = namedVol.Dest
+ newVol.Options = namedVol.Options
+ newVol.Name = namedVol.Name
+
+ finalNamedVolumes[namedVol.Dest] = newVol
+ }
+
+ // 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
+}
+
+// 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.
+// This does *NOT* modify the container command - that must be done elsewhere.
+func addContainerInitBinary(s *specgen.SpecGenerator, 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 !s.PidNS.IsPrivate() {
+ return mount, fmt.Errorf("cannot add init binary as PID 1 (PID namespace isn't private)")
+ }
+ if s.Systemd == "true" || s.Systemd == "always" {
+ 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")
+ }
+ 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
diff --git a/pkg/specgen/namespaces.go b/pkg/specgen/namespaces.go
index 4f35b31bf..f0161a793 100644
--- a/pkg/specgen/namespaces.go
+++ b/pkg/specgen/namespaces.go
@@ -33,6 +33,11 @@ const (
// Slirp indicates that a slirp4netns network stack should
// be used
Slirp NamespaceMode = "slirp4netns"
+ // KeepId indicates a user namespace to keep the owner uid inside
+ // of the namespace itself
+ KeepID NamespaceMode = "keep-id"
+ // KeepId indicates to automatically create a user namespace
+ Auto NamespaceMode = "auto"
)
// Namespace describes the namespace
@@ -72,6 +77,27 @@ func (n *Namespace) IsPrivate() bool {
return n.NSMode == Private
}
+// IsAuto indicates the namespace is auto
+func (n *Namespace) IsAuto() bool {
+ return n.NSMode == Auto
+}
+
+// IsKeepID indicates the namespace is KeepID
+func (n *Namespace) IsKeepID() bool {
+ return n.NSMode == KeepID
+}
+
+func validateUserNS(n *Namespace) error {
+ if n == nil {
+ return nil
+ }
+ switch n.NSMode {
+ case Auto, KeepID:
+ return nil
+ }
+ return n.validate()
+}
+
func validateNetNS(n *Namespace) error {
if n == nil {
return nil
@@ -133,6 +159,8 @@ func (n *Namespace) validate() error {
func ParseNamespace(ns string) (Namespace, error) {
toReturn := Namespace{}
switch {
+ case ns == "pod":
+ toReturn.NSMode = FromPod
case ns == "host":
toReturn.NSMode = Host
case ns == "private":
@@ -158,6 +186,29 @@ func ParseNamespace(ns string) (Namespace, error) {
return toReturn, nil
}
+// ParseUserNamespace parses a user namespace specification in string
+// form.
+func ParseUserNamespace(ns string) (Namespace, error) {
+ toReturn := Namespace{}
+ switch {
+ case ns == "auto":
+ toReturn.NSMode = Auto
+ return toReturn, nil
+ case strings.HasPrefix(ns, "auto:"):
+ split := strings.SplitN(ns, ":", 2)
+ if len(split) != 2 {
+ return toReturn, errors.Errorf("invalid setting for auto: mode")
+ }
+ toReturn.NSMode = Auto
+ toReturn.Value = split[1]
+ return toReturn, nil
+ case ns == "keep-id":
+ toReturn.NSMode = KeepID
+ return toReturn, nil
+ }
+ return ParseNamespace(ns)
+}
+
// ParseNetworkNamespace parses a network namespace specification in string
// form.
// Returns a namespace and (optionally) a list of CNI networks to join.
@@ -165,6 +216,8 @@ func ParseNetworkNamespace(ns string) (Namespace, []string, error) {
toReturn := Namespace{}
var cniNetworks []string
switch {
+ case ns == "pod":
+ toReturn.NSMode = FromPod
case ns == "bridge":
toReturn.NSMode = Bridge
case ns == "none":
diff --git a/pkg/specgen/pod_validate.go b/pkg/specgen/pod_validate.go
index f2f90e58d..98d59549e 100644
--- a/pkg/specgen/pod_validate.go
+++ b/pkg/specgen/pod_validate.go
@@ -62,7 +62,7 @@ func (p *PodSpecGenerator) Validate() error {
return exclusivePodOptions("NoInfra", "NoManageResolvConf")
}
}
- if p.NetNS.NSMode != Bridge {
+ if p.NetNS.NSMode != "" && p.NetNS.NSMode != Bridge && p.NetNS.NSMode != Default {
if len(p.PortMappings) > 0 {
return errors.New("PortMappings can only be used with Bridge mode networking")
}
diff --git a/pkg/specgen/specgen.go b/pkg/specgen/specgen.go
index 37f2b3190..20c8f8800 100644
--- a/pkg/specgen/specgen.go
+++ b/pkg/specgen/specgen.go
@@ -154,14 +154,23 @@ type ContainerStorageConfig struct {
// ImageVolumeMode indicates how image volumes will be created.
// Supported modes are "ignore" (do not create), "tmpfs" (create as
// tmpfs), and "anonymous" (create as anonymous volumes).
- // The default is anonymous.
+ // The default if unset is anonymous.
// Optional.
ImageVolumeMode string `json:"image_volume_mode,omitempty"`
- // VolumesFrom is a list of containers whose volumes will be added to
- // this container. Supported mount options may be added after the
- // container name with a : and include "ro" and "rw".
- // Optional.
+ // VolumesFrom is a set of containers whose volumes will be added to
+ // this container. The name or ID of the container must be provided, and
+ // may optionally be followed by a : and then one or more
+ // comma-separated options. Valid options are 'ro', 'rw', and 'z'.
+ // Options will be used for all volumes sourced from the container.
VolumesFrom []string `json:"volumes_from,omitempty"`
+ // Init specifies that an init binary will be mounted into the
+ // container, and will be used as PID1.
+ Init bool `json:"init,omitempty"`
+ // InitPath specifies the path to the init binary that will be added if
+ // Init is specified above. If not specified, the default set in the
+ // Libpod config will be used. Ignored if Init above is not set.
+ // Optional.
+ InitPath string `json:"init_path,omitempty"`
// Mounts are mounts that will be added to the container.
// These will supersede Image Volumes and VolumesFrom volumes where
// there are conflicts.
@@ -402,8 +411,13 @@ type NamedVolume struct {
}
// NewSpecGenerator returns a SpecGenerator struct given one of two mandatory inputs
-func NewSpecGenerator(image string) *SpecGenerator {
- csc := ContainerStorageConfig{Image: image}
+func NewSpecGenerator(arg string, rootfs bool) *SpecGenerator {
+ csc := ContainerStorageConfig{}
+ if rootfs {
+ csc.Rootfs = arg
+ } else {
+ csc.Image = arg
+ }
return &SpecGenerator{
ContainerStorageConfig: csc,
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-01-13 02:57:15 +0000