This Adds a support for create,delete snapshot
and creating a new rbd image from the snapshot.
* Create a snapshot
* Create a temporary snapshot from the parent volume
* Clone a new image from a temporary snapshot with options
--rbd-default-clone-format 2 --image-feature layering,deep-flatten
* Delete temporary snapshot created
* Create a new snapshot from cloned image
* Check the image chain depth, if the Softlimit is reached Add a
task Flatten the cloned image and return success. if the depth
is reached hard limit Add a task Flatten the cloned image and
return snapshot status ready as false
```bash
1) rbd snap create <RBD image for src k8s volume>@<random snap name>
2) rbd clone --rbd-default-clone-format 2 --image-feature
layering,deep-flatten <RBD image for src k8s volume>@<random snap>
<RBD image for temporary snap image>
3) rbd snap rm <RBD image for src k8s volume>@<random snap name>
4) rbd snap rm <RBD image for temporary snap image>@<random snap name>
5) check the depth, if the depth is greater than configured hard
limit add a task to flatten the cloned image return snapshot status
ready as false if the depth is greater than soft limit add a task
to flatten the image and return success
```
* Create a clone from snapshot
* Clone a new image from the snapshot with user-provided options
* Check the depth(n) of the cloned image if n>=(hard limit)
Add task to flatten the image and return ABORT (to avoid image leak)
```bash
1) rbd clone --rbd-default-clone-format 2 --image-feature
<k8s dst vol config> <RBD image for temporary snap image>@<random snap name>
<RBD image for k8s dst vol>
2) check the depth, if the depth is greater than configured hard limit
add a task to flatten the cloned image return ABORT error if the depth is
greater than soft limit add a task to flatten the image and return success
```
* Delete snapshot or pvc
* Move the temporary cloned image to the trash
* Add task to remove the image from the trash
```bash
1) rbd trash mv <cloned image>
2) ceph rbd task trash remove <cloned image>
```
With earlier implementation to delete the image, we used to add
a task to remove the image with new changes this cannot be done
as the image may contain snapshots or linking.so we will be
doing below steps to delete an image(this will be
applicable for both normal image and cloned image)
* Move the rbd image to the trash
* Add task to remove the image from the trash
```bash
1) rbd trash mv <image>
2) ceph rbd task trash remove <image>
```
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
we dont need to call the snapshot CLI functions
to get snapshot details. as these details are not
requried with new snapshot design.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
cephcsi need to store and retrieve the rbd image ID
in the omap as we need the image ID to add a
task to remove the image from the Trash.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
as with snapshot and cloning implementation
the rbd images cannot be deleted with rbd
remove or add a task to delete the rbd image
as it might contains the snapshots and clones.
we need to make use of the rbd mv trask and
add a task to remove the image from trash
once all its clones and snapshots links
are broken and there will no longer any
dependency between parent and child images.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
add a new function called getImageID to fetch
the image id of an image which need to be stored
and retrived for Delete operation.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
added Hardlimit and Softlimit flags for cephcsi
arguments. When the Softlimit is reached cephcsi
will start a background task to flatten the rbd
image and return success and if the hardlimit
is reached it will start a background task
to flatten the rbd image and return ready
to use as false to make sure that the image
will not be used until it is flatten.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
As we are using v2 cloning we dont need to
do protect the snapshot before cloning and
unprotect it before deleting.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
if the PVC access mode is ReadOnlyMany
or single node readonly, mounting the rbd
device path to the staging path as readonly
to avoid the write operation.
If the PVC acccess mode is readonly, mapping
rbd images as readonly.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
go-ceph v0.3 adds constants for ImageFeature values and their names.
Instead of hardcoding "layering" in several places, use the constant
given by librbd.
The rbdVolume.ImageFeatures does not seem to be used anywhere after the
conversion. Stashing the image metadata does include the ImageFeatures
as these are retrieved when getting the image information. It is safe to
drop ImageFeatures altogether and only use the imageFeatureSet instead.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Go 1.13 contains support for error wrapping. To support wrapping,
fmt.Errorf now has a %w verb for creating wrapped errors, and three
new functions in the errors package ( errors.Unwrap, errors.Is and
errors.As) simplify unwrapping and inspecting wrapped errors.
With this change, If we currently compare errors using ==, we have to
use errors.Is instead. Example:
if err == io.ErrUnexpectedEOF
becomes
if errors.Is(err, io.ErrUnexpectedEOF)
https://tip.golang.org/doc/go1.13#error_wrapping
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
This prevents the need to open the IOContext for additional operations
on the image.
It also addresses a leak of the IOContext in case `rbdVolume.open()` was
called. The method only returned the `rbd.Image` without the possibility
to close the related IOContext.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
There is a bug in current code where the devicePath
is always empty and the rbd image unmap never
happens if nodeplugin fails to mount the rbd image
to the stagingpath.
This is a fix to unmap the rbd image if some issue
occurs after rbd image is mapped.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
When mounting fails, the node-plugin should give a suggestion to check the
kernel logs so that users can report problems better.
Edited the existing log to include the message in both rbd and cephfs.
Fixes: https://github.com/ceph/ceph-csi/issues/1006
Signed-off-by: Mudit Agarwal <muagarwa@redhat.com>
Before, the one CSIJournal type was handling both configuration and
providing methods to make changes to the journal. This created the
temptation to modify the state of the global configuration object to
enact changes through the method calls.
This change creates a new type `journal.Connection` that takes the
monitors and credentials to create a short(er)-lived object to actually
read and make changes on the journal. This also avoid mixing the
arguments needed to connect to the cluster with the arguments needed
for the various journal read & update calls.
Signed-off-by: John Mulligan <jmulligan@redhat.com>
By using switch/case it is easier to follow the error checking of the
genVolFromVolID() function. In case a new error is added as a return of
the function, it will be simpler to add checking for it.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
The function SetCSIDirectorySuffix was used only one per (long-lived,
gloabl) journal object. It is simpler to construct the journal objects
with this needed parameter:
1. As it is required to function and non-optional AFAICT
2. Removes the temptation to mutate global object
3. Reduces LOC with exact same functionality
4. SetCSIDirectorySuffix would not behave correctly if called a 2nd time
anyway.
Point 4. means that if you called the function twice to change the
suffix when you previously had "csi.volumes.alice", you'd get
"csi.volumes.alice.bob" instead of "csi.volumes.bob" what one would
expect.
Signed-off-by: John Mulligan <jmulligan@redhat.com>
The problem happens when multiple PVCs with the
same UUID are attached/mounted on a node. This
can happen after creating a PVC from a snapshot,
or cloning a PVC.
make nouuid as the default mount option if
the format type is xfs to avoid mounting
issues.
updates: #966
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
The gocyclo linter complains about the high complexity of the
CreateVolume() function:
> pkg/rbd/controllerserver.go:133:1: cyclomatic complexity 21 of func `(*ControllerServer).CreateVolume` is high (> 20) (gocyclo)
By splitting it up and separeting the creation of an exisint CSI Volume
object in buildCreateVolumeResponse(), the gocyclic linter does not
complain any longer.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
golint has a pretty struct stylechek, it down not allow different
variable names for methods on an object:
pkg/rbd/rbd_util.go:970:1: receiver name rbdVol should be consistent with previous receiver name rv for rbdVolume (golint)
func (rbdVol *rbdVolume) ensureEncryptionMetadataSet(ctx context.Context) error {
^
pkg/rbd/rbd_journal.go:166:26: ST1016: methods on the same type should have the same receiver name (seen 2x "rbdVol", 3x "rv") (stylecheck)
func (rbdVol *rbdVolume) Exists(ctx context.Context) (bool, error) {
^
Rename the 'rbdVol' variable to 'rv' to make it consistent.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
rbdVolume.open() was split from commit 5dd34732e1e while moving part of
the functionality to util.ClusterConnection. It seems that .open() is
not used anywhere at the moment, so drop it until follow-up patches
require it again.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
The shared util.ClusterConnection can be used for rbd.rbdVolume and
cephfs.volumeOptions to connect to the Ceph cluster. This will then use
the shared ConnPool, and functions for obtaining connection details will
be the same across cephfs and rbd packages.
The ClusterConnection.Creds credentials are temporarily available until
all the functions have been adapted to use go-ceph and the connection
from the ConnPool.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
This new journal package isolates journal logic from the rest of util
and helps draw bright lines between what is a generic utility function
and what is csi journal logic.
Done partly as preparation for making use of go-ceph in journal.
No functional changes are made except to update references to allow the
code to compile.
Signed-off-by: John Mulligan <jmulligan@redhat.com>
The internal/ directory in Go has a special meaning, and indicates that
those packages are not meant for external consumption. Ceph-CSI does
provide public APIs for other projects to consume. There is no plan to
keep the API of the internally used packages stable.
Closes: #903
Signed-off-by: Niels de Vos <ndevos@redhat.com>
