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authorDaniel J Walsh <dwalsh@redhat.com>2021-12-22 15:07:37 -0500
committerDaniel J Walsh <dwalsh@redhat.com>2022-01-04 13:48:03 -0500
commit2e0d3e9ea45f9ebb77ffe1f9022b46f0e429fb5e (patch)
tree54d1993a8873396bbf41d24b5c7235f6195ba166 /libpod
parent47cf00eb1349e7823b2c4286e39a517ea4657242 (diff)
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Support all volume mounts for rootless containers
Fix handling of "bind" and "tmpfs" olumes to actually work. Allow bind, tmpfs local volumes to work in rootless mode. Also removed the string "error" from all error messages that begine with it. All Podman commands are printed with Error:, so this causes an ugly stutter. Fixes: https://github.com/containers/podman/issues/12013 Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Diffstat (limited to 'libpod')
-rw-r--r--libpod/container_internal.go2
-rw-r--r--libpod/runtime_volume_linux.go42
-rw-r--r--libpod/volume_internal.go2
-rw-r--r--libpod/volume_internal_linux.go35
4 files changed, 35 insertions, 46 deletions
diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index 7ae9daefa..2d12a90d1 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -762,7 +762,7 @@ func (c *Container) export(path string) error {
if !c.state.Mounted {
containerMount, err := c.runtime.store.Mount(c.ID(), c.config.MountLabel)
if err != nil {
- return errors.Wrapf(err, "error mounting container %q", c.ID())
+ return errors.Wrapf(err, "mounting container %q", c.ID())
}
mountPoint = containerMount
defer func() {
diff --git a/libpod/runtime_volume_linux.go b/libpod/runtime_volume_linux.go
index ed3cc971c..d4d9a4438 100644
--- a/libpod/runtime_volume_linux.go
+++ b/libpod/runtime_volume_linux.go
@@ -35,7 +35,7 @@ func (r *Runtime) newVolume(ctx context.Context, options ...VolumeCreateOption)
volume := newVolume(r)
for _, option := range options {
if err := option(volume); err != nil {
- return nil, errors.Wrapf(err, "error running volume create option")
+ return nil, errors.Wrapf(err, "running volume create option")
}
}
@@ -50,7 +50,7 @@ func (r *Runtime) newVolume(ctx context.Context, options ...VolumeCreateOption)
// Check if volume with given name exists.
exists, err := r.state.HasVolume(volume.config.Name)
if err != nil {
- return nil, errors.Wrapf(err, "error checking if volume with name %s exists", volume.config.Name)
+ return nil, errors.Wrapf(err, "checking if volume with name %s exists", volume.config.Name)
}
if exists {
return nil, errors.Wrapf(define.ErrVolumeExists, "volume with name %s already exists", volume.config.Name)
@@ -67,9 +67,15 @@ func (r *Runtime) newVolume(ctx context.Context, options ...VolumeCreateOption)
if volume.config.Driver == define.VolumeDriverLocal {
logrus.Debugf("Validating options for local driver")
// Validate options
- for key := range volume.config.Options {
- switch key {
- case "device", "o", "type", "UID", "GID", "SIZE", "INODES":
+ for key, val := range volume.config.Options {
+ switch strings.ToLower(key) {
+ case "device":
+ if strings.ToLower(volume.config.Options["type"]) == "bind" {
+ if _, err := os.Stat(val); err != nil {
+ return nil, errors.Wrapf(err, "invalid volume option %s for driver 'local'", key)
+ }
+ }
+ case "o", "type", "uid", "gid", "size", "inodes":
// Do nothing, valid keys
default:
return nil, errors.Wrapf(define.ErrInvalidArg, "invalid mount option %s for driver 'local'", key)
@@ -92,17 +98,17 @@ func (r *Runtime) newVolume(ctx context.Context, options ...VolumeCreateOption)
// Create the mountpoint of this volume
volPathRoot := filepath.Join(r.config.Engine.VolumePath, volume.config.Name)
if err := os.MkdirAll(volPathRoot, 0700); err != nil {
- return nil, errors.Wrapf(err, "error creating volume directory %q", volPathRoot)
+ return nil, errors.Wrapf(err, "creating volume directory %q", volPathRoot)
}
if err := os.Chown(volPathRoot, volume.config.UID, volume.config.GID); err != nil {
- return nil, errors.Wrapf(err, "error chowning volume directory %q to %d:%d", volPathRoot, volume.config.UID, volume.config.GID)
+ return nil, errors.Wrapf(err, "chowning volume directory %q to %d:%d", volPathRoot, volume.config.UID, volume.config.GID)
}
fullVolPath := filepath.Join(volPathRoot, "_data")
if err := os.MkdirAll(fullVolPath, 0755); err != nil {
- return nil, errors.Wrapf(err, "error creating volume directory %q", fullVolPath)
+ return nil, errors.Wrapf(err, "creating volume directory %q", fullVolPath)
}
if err := os.Chown(fullVolPath, volume.config.UID, volume.config.GID); err != nil {
- return nil, errors.Wrapf(err, "error chowning volume directory %q to %d:%d", fullVolPath, volume.config.UID, volume.config.GID)
+ return nil, errors.Wrapf(err, "chowning volume directory %q to %d:%d", fullVolPath, volume.config.UID, volume.config.GID)
}
if err := LabelVolumePath(fullVolPath); err != nil {
return nil, err
@@ -132,7 +138,7 @@ func (r *Runtime) newVolume(ctx context.Context, options ...VolumeCreateOption)
lock, err := r.lockManager.AllocateLock()
if err != nil {
- return nil, errors.Wrapf(err, "error allocating lock for new volume")
+ return nil, errors.Wrapf(err, "allocating lock for new volume")
}
volume.lock = lock
volume.config.LockID = volume.lock.ID()
@@ -149,7 +155,7 @@ func (r *Runtime) newVolume(ctx context.Context, options ...VolumeCreateOption)
// Add the volume to state
if err := r.state.AddVolume(volume); err != nil {
- return nil, errors.Wrapf(err, "error adding volume to state")
+ return nil, errors.Wrapf(err, "adding volume to state")
}
defer volume.newVolumeEvent(events.Create)
return volume, nil
@@ -181,7 +187,7 @@ func makeVolumeInPluginIfNotExist(name string, options map[string]string, plugin
createReq.Name = name
createReq.Options = options
if err := plugin.CreateVolume(createReq); err != nil {
- return errors.Wrapf(err, "error creating volume %q in plugin %s", name, plugin.Name)
+ return errors.Wrapf(err, "creating volume %q in plugin %s", name, plugin.Name)
}
}
@@ -225,13 +231,13 @@ func (r *Runtime) removeVolume(ctx context.Context, v *Volume, force bool, timeo
continue
}
- return errors.Wrapf(err, "error removing container %s that depends on volume %s", dep, v.Name())
+ return errors.Wrapf(err, "removing container %s that depends on volume %s", dep, v.Name())
}
logrus.Debugf("Removing container %s (depends on volume %q)", ctr.ID(), v.Name())
if err := r.removeContainer(ctx, ctr, force, false, false, timeout); err != nil {
- return errors.Wrapf(err, "error removing container %s that depends on volume %s", ctr.ID(), v.Name())
+ return errors.Wrapf(err, "removing container %s that depends on volume %s", ctr.ID(), v.Name())
}
}
}
@@ -244,7 +250,7 @@ func (r *Runtime) removeVolume(ctx context.Context, v *Volume, force bool, timeo
// them.
logrus.Errorf("Unmounting volume %s: %v", v.Name(), err)
} else {
- return errors.Wrapf(err, "error unmounting volume %s", v.Name())
+ return errors.Wrapf(err, "unmounting volume %s", v.Name())
}
}
@@ -288,13 +294,13 @@ func (r *Runtime) removeVolume(ctx context.Context, v *Volume, force bool, timeo
if removalErr != nil {
logrus.Errorf("Removing volume %s from plugin %s: %v", v.Name(), v.Driver(), removalErr)
}
- return errors.Wrapf(err, "error removing volume %s", v.Name())
+ return errors.Wrapf(err, "removing volume %s", v.Name())
}
// Free the volume's lock
if err := v.lock.Free(); err != nil {
if removalErr == nil {
- removalErr = errors.Wrapf(err, "error freeing lock for volume %s", v.Name())
+ removalErr = errors.Wrapf(err, "freeing lock for volume %s", v.Name())
} else {
logrus.Errorf("Freeing lock for volume %q: %v", v.Name(), err)
}
@@ -304,7 +310,7 @@ func (r *Runtime) removeVolume(ctx context.Context, v *Volume, force bool, timeo
// from /var/lib/containers/storage/volumes
if err := v.teardownStorage(); err != nil {
if removalErr == nil {
- removalErr = errors.Wrapf(err, "error cleaning up volume storage for %q", v.Name())
+ removalErr = errors.Wrapf(err, "cleaning up volume storage for %q", v.Name())
} else {
logrus.Errorf("Cleaning up volume storage for volume %q: %v", v.Name(), err)
}
diff --git a/libpod/volume_internal.go b/libpod/volume_internal.go
index f69f1c044..f9e1ea87d 100644
--- a/libpod/volume_internal.go
+++ b/libpod/volume_internal.go
@@ -81,7 +81,7 @@ func (v *Volume) save() error {
func (v *Volume) refresh() error {
lock, err := v.runtime.lockManager.AllocateAndRetrieveLock(v.config.LockID)
if err != nil {
- return errors.Wrapf(err, "error acquiring lock %d for volume %s", v.config.LockID, v.Name())
+ return errors.Wrapf(err, "acquiring lock %d for volume %s", v.config.LockID, v.Name())
}
v.lock = lock
diff --git a/libpod/volume_internal_linux.go b/libpod/volume_internal_linux.go
index 45cd22385..abd31df0f 100644
--- a/libpod/volume_internal_linux.go
+++ b/libpod/volume_internal_linux.go
@@ -7,7 +7,6 @@ import (
"strings"
"github.com/containers/podman/v3/libpod/define"
- "github.com/containers/podman/v3/pkg/rootless"
pluginapi "github.com/docker/go-plugins-helpers/volume"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
@@ -32,13 +31,6 @@ func (v *Volume) mount() error {
return nil
}
- // We cannot mount 'local' volumes as rootless.
- if !v.UsesVolumeDriver() && rootless.IsRootless() {
- // This check should only be applied to 'local' driver
- // so Volume Drivers must be excluded
- return errors.Wrapf(define.ErrRootless, "cannot mount volumes without root privileges")
- }
-
// Update the volume from the DB to get an accurate mount counter.
if err := v.update(); err != nil {
return err
@@ -90,22 +82,27 @@ func (v *Volume) mount() error {
// TODO: might want to cache this path in the runtime?
mountPath, err := exec.LookPath("mount")
if err != nil {
- return errors.Wrapf(err, "error locating 'mount' binary")
+ return errors.Wrapf(err, "locating 'mount' binary")
}
mountArgs := []string{}
if volOptions != "" {
mountArgs = append(mountArgs, "-o", volOptions)
}
- if volType != "" {
+ switch volType {
+ case "":
+ case "bind":
+ mountArgs = append(mountArgs, "-o", volType)
+ default:
mountArgs = append(mountArgs, "-t", volType)
}
+
mountArgs = append(mountArgs, volDevice, v.config.MountPoint)
mountCmd := exec.Command(mountPath, mountArgs...)
logrus.Debugf("Running mount command: %s %s", mountPath, strings.Join(mountArgs, " "))
if output, err := mountCmd.CombinedOutput(); err != nil {
logrus.Debugf("Mount %v failed with %v", mountCmd, err)
- return errors.Wrapf(errors.Errorf(string(output)), "error mounting volume %s", v.Name())
+ return errors.Errorf(string(output))
}
logrus.Debugf("Mounted volume %s", v.Name())
@@ -139,20 +136,6 @@ func (v *Volume) unmount(force bool) error {
return nil
}
- // We cannot unmount 'local' volumes as rootless.
- if !v.UsesVolumeDriver() && rootless.IsRootless() {
- // If force is set, just clear the counter and bail without
- // error, so we can remove volumes from the state if they are in
- // an awkward configuration.
- if force {
- logrus.Errorf("Volume %s is mounted despite being rootless - state is not sane", v.Name())
- v.state.MountCount = 0
- return v.save()
- }
-
- return errors.Wrapf(define.ErrRootless, "cannot mount or unmount volumes without root privileges")
- }
-
if !force {
v.state.MountCount--
} else {
@@ -184,7 +167,7 @@ func (v *Volume) unmount(force bool) error {
// Ignore EINVAL - the mount no longer exists.
return nil
}
- return errors.Wrapf(err, "error unmounting volume %s", v.Name())
+ return errors.Wrapf(err, "unmounting volume %s", v.Name())
}
logrus.Debugf("Unmounted volume %s", v.Name())
}