Have the provisioner create the passphrase for the volume, instead of
doign it lazily at the time the volume is used for the 1st time. This
prevents potential races where pods on different nodes try to store
different passphrases at the (almost) same time.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
It seems that calls to addRbdManagerTask() do not include the
rados-namespace in the image location. Functions calling
addRbdManagerTask() construct the image location themselves, but should
use rbdVolume.String() to include all the attributes.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Make rbdplugin pod work in a non-initial network namespace (i.e. with
"hostNetwork: false") by skipping waiting for udev events when mapping
and unmapping images. CSI use case is very simple: all that is needed
is a device node which is immediately fed to mkfs, so we should be able
to tolerate udev not being finished with the device just fine.
Fixes: #1323
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
With the new support for passing --options, referring to ExecCommand()
argument slices as mapOptions and options is confusing.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
mount packges is moved from
k8s.io/utils/mount to a new repository
k8s.io/mount-utils. updated code to use
the same.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Add a new method to the EncryptionKMS interface so that resources can be
freed when EncryptionKMS instances get freed.
With the move to using the libopenstorage API, a temporary file needs to
store the optional CA certificate. The Destroy() method of the
vaultConnection type now removes this file.
The rbdVolume uses the EncryptionKMS type now, so call the new Destroy()
method from withing rbdVolume.Destroy().
Signed-off-by: Niels de Vos <ndevos@redhat.com>
The Owner of an RBD image (Kubernetes Namespace, tenant) can be used to
identify additional configuration options. This will be used for
fetching the right Vault Token when encrypting/decrypting volumes.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
If cephcsi encounters any error after
reservation, as a cleanup operation
it should revert back the reservation.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
If the omap data already exits return nil.
so that omap generator will not try to reserve
anything again.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
earlier if the depth check fails the
complete vol struct was getting logged,
this commits logs only the pool and image
name.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
In the case of Disaster Recovery failover, the
user expected to create the static PVC's. We have
planned not to go with the PVC name and namespace
for many reasons (as in kubernetes it's planned to
support PVC transfer to a new namespace with a
different name and with new features coming in
like data populator etc). For now, we are
planning to go with static PVC's to support
async mirroring.
During Async mirroring only the RBD images are
mirrored to the secondary site, and when the
user creates the static PVC's on the failover
we need to regenerate the omap data. The
volumeHandler in PV spec is an encoded string
which contains clusterID and poolID and image UUID,
The clusterID and poolID won't remain same on both
the clusters, for that cephcsi need to generate the
new volume handler and its to create a mapping
between new volume handler and old volume handler
with that whenever cephcsi gets csi requests it
check if the mapping exists it will pull the new
volume handler and continues other operations.
The new controller watches for the PVs created,
It checks if the omap exists if it doesn't it
will regenerate the entire omap data.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
in case of mirrored image, if the image is
primary a watcher will be added by the rbd
mirror deamon on the rbd image.
we have to consider 2 watcher to check image
is in use.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
incase of async mirroring the volume UUID is
retrieved from the volume name, instead of cephcsi
generating a new UUID it should reserve the passed
UUID it will be useful when we support both metro DR
and async mirroring on a kubernetes clusters.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
An rbd image can have a maximum number of
snapshots defined by maxsnapshotsonimage
On the limit is reached the cephcsi will
start flattening the older snapshots and
returns the ABORT error message, The Request
comes after this as to wait till all the
images are flattened (this will increase the
PVC creation time. Instead of waiting till
the maximum snapshots on an RBD image, we can
have a soft limit, once the limit reached
cephcsi will start flattening the task to
break the chain. With this PVC creation time
will only be affected when the hard limit
(minsnapshotsonimage) reached.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
`cap` builtin function returns the capacity of a type. Its not
good practice to use this builtin function for other variable
names, removing it here
Ref# https://golang.org/pkg/builtin/#cap
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
volJournal.Connect() got the error on err2 variable, however
the return was on variable err which hold the error return of
DecomposeCSIID() which is wrong. This cause the error return wrongly
parsed and pushed from the caller. From now on, we are reusing the
err variable to hold and revert the error of volJournal.Connect().
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
All the previous condition checks exit from the function and
when it reach to this block its obvious that error is non nil,
we dont need an extra check here.
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
The error check condition in genVolFromID() is always false as far as
code reading/workflow goes. Removing it for the same reason.
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
cephcsi uses cli for fetching snap list as well as to check the
snapshot namespace, replaced that with go-ceph calls.
Signed-off-by: Mudit Agarwal <muagarwa@redhat.com>
It doesnot make sense to allow the creation of empty
volumes which is going to be accessed with readonly mode,
this commit allows the creation of volume which is having
readonly capabilities only if the content source is set
for the volume.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Form kubernetes v1.19 onwards NodeRequest is getting volume path
in StagingTargetPath instead of VolumePath, cephcsi should also
use the same.
Signed-off-by: Mudit Agarwal <muagarwa@redhat.com>
updateVolWithImageInfo() is currently executing an rbd command
to get details about an RBD image. Replaced it with the
required go-ceph functions.
Signed-off-by: Mudit Agarwal <muagarwa@redhat.com>
in case of clone failure, we need to first delete
the clone and the snapshot from which we created
the clone, then as part of cleanup we need to remove
the temporary cloned image and the temporary snapshot
created on the parent image.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
At CSI spec < 1.2.0, there was no volumecapability in the
expand request. However its available from v1.2+ which allows
us to declare the node operations based on the volume mode.
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
if the image is created without flattening image-feature
the image will get few image-features by default, deep-flatten
is one of them. if the image doesnot have any parent
the rbd image flattening will fail, This commit discards
error message if the image doesnt have any parent.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
merging of https://github.com/ceph/ceph-csi/pull/1035
broken the cephcsi building. This commits fixes
the build issue.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Make sure to operate within the namespace if any given
when dealing with rbd images and snapshots and their journals.
Signed-off-by: Mehdy Khoshnoody <mehdy.khoshnoody@gmail.com>
if we are not able to fetch the cluster-ID from
the createSnapshot request and also if we are
not able to get the monitor information from
the cluster-ID return error instead of using
the parent image information.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Replaced command execution with go-ceph Resize() function.
Volsize is being updated before waiting for resize() to return,
fixed it to get updated only after resize() is successful.
Signed-off-by: Mudit Agarwal <muagarwa@redhat.com>
While adding the context.Context to the resizeRBDimage() function, it
became a little ugly. So renaming the function to resize() and making it
a method of the rbdVolume type.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Most consumers of util.ExecCommand() need to convert the returned []byte
format of stdout and/or stderr to string. By having util.ExecCommand()
return strings instead, the code gets a little simpler.
A few commands return JSON that needs to be parsed. These commands will
be replaced by go-ceph implementations later on. For now, convert the
strings back to []byte when needed.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
All calls to util.ExecCommand() now pass the context.Context. In some
cases this is not possible or needed, and util.ExecCommand() will not
log the command.
This should make debugging easier when command executions fail.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Current versions of the mkfs.xfs binary enable reflink support by
default. This causes problems on systems where the kernel does not
support this feature. When the kernel the feature does not support, but
the filesystem has it enabled, the following error is logged in `dmesg`:
XFS: Superblock has unknown read-only compatible features (0x4) enabled
Introduce a check to see if mkfs.xfs supports the `-m reflink=` option.
In case it does, pass `-m reflink=0` while creating the filesystem.
The check is executed once during the first XFS filesystem creation. The
result of the check is cached until the nodeserver restarts.
Fixes: #966
Signed-off-by: Niels de Vos <ndevos@redhat.com>
The new rbdVolume.isInUse() method will replace the rbdStatus()
function. This removes one more rbd command execution in the
DeleteVolume path.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
This change replaces the sentinel errors in rbd module with
standard errors created with errors.New().
Related: #1203
Signed-off-by: Sven Anderson <sven@redhat.com>
The sentinel error code had additional fields in the errors, that are
used nowhere. This leads to unneccesarily complicated code. This
change replaces the sentinel errors in utils with standard errors
created with errors.New() and adds a simple JoinErrors() function to
be able to combine sentinel errors from different code tiers.
Related: #1203
Signed-off-by: Sven Anderson <sven@redhat.com>
Take operation locks on the resources before operating
on the resouces. This allows us to do parallel operations
for some RPC calls such as Clone and Restore of PVC.
This operations will only be blocked if the image is
expanding or Snapshot and RBD image is getting deleted.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Direct usage of numbers should be avoided.
Issue reported:
mnd: Magic number: X, in <argument> detected (gomnd)
Signed-off-by: Yug <yuggupta27@gmail.com>
Add explanation to nolint directives.
Issue reported:
whyNoLint: include an explanation for nolint directive (gocritic)
Signed-off-by: Yug <yuggupta27@gmail.com>
If the requested volume size and the snapshot or the
parent volume from which the clone is to be created
is not equal cephcsi returns an error message.
updates #1188
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
If the image in the chain is moved to trash, we
cannot get the image details. We need to return the
found depth to the caller.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
If the snapshots on the parent image exceeds
maxSnapshotsOnImage count, we need to flatten
all the temporary cloned images to over come the
krbd issue of maximum number of snapshots on
an image.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
create temporary snapshot on the parent image same as
name as the temporary clone rbd image. Naming the snapshot
and the temporary cloned image helps to flatten the temporary
cloned images when the snapshots on the parent image exceeds
the configured maxSnapshotsOnImage.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
as v1.0.0 is deprecated we need to remove the support
for it in the Next coming (v3.0.0) release. This PR
removes the support for the same.
closes#882
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Added support for RBD PVC to PVC cloning, below
commands are executed to create a PVC-PVC clone from
RBD side.
* Check the depth(n) of the cloned image if n>=(hard limit -2)
or ((soft limit-2) Add a task to flatten the image and return
about (to avoid image leak) **Note** will try to flatten the
temp clone image in the chain if available
* Reserve the key and values in omap (this will help us to
avoid the leak as it's not reserved earlier as we have returned
ABORT (the request may not come back))
* Create a snapshot of rbd image
* Clone the snapshot (temp clone)
* Delete the snapshot
* Snapshot the temp clone
* Clone the snapshot (final clone)
* Delete the snapshot
```bash
1) check the image depth of the parent image if flatten required
add a task to flatten image and return ABORT to avoid leak
(hardlimit-2 and softlimit-2 check will be done)
2) Reserve omap keys
2) rbd snap create <RBD image for src k8s volume>@<random snap name>
3) 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>
4) rbd snap rm <RBD image for src k8s volume>@<random snap name>
5) rbd snap create <cloned RBD image created in snapshot process>@<random snap name>
6) 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>
7)rbd snap rm <RBD image for src k8s volume>@<random snap name>
```
* Delete temporary clone image created as part of clone(delete if present)
* Delete rbd image
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
during the checkSnapCloneExists we are checking
the image, if the image not found we are deleting
the snapshot on the parent image, This PR corrects
the comparasion. instead of snapshotNotFound we need
to check ImageNotFound error.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
as RHEL 8.2 supports the deep-flatten
feature, added it to the list to map
the rbd images on the node without flattening.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
as v5.1.0 supports the deep-flatten feature,lowering
the required version to map rbd images which
are having deep-flatten feature
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
we need to take lock on parent rbd image when
we are creating a snapshot from it, if the user
tries to delete/resize the rbd image when we are
taking snapshots,we may face issues. if the volume
lock is present on the rbd image, the user cannot
resize the rbd image nor delete the rbd image.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
flatten cloned images to remove the link
with the snapshot as the parent snapshot can
be removed from the trash.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Added maxsnapshotsonimage flag to flatten
the older rbd images on the chain to avoid
issue in krbd.The limit is in krbd since it
only allocate 1 4KiB page to handle all the
snapshot ids for an image.
The max limit is 510 as per
https://github.com/torvalds/linux/blob/
aaa2faab4ed8e5fe0111e04d6e168c028fe2987f/drivers/block/rbd.c#L98
in cephcsi we arekeeping the default to 450 to reserve 10%
to avoid issues.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
added listsnapshots function for an
rbd image to list all the snapshots
created from an rbd images, This will
list the snapshots which are in trash also.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Several places in the code compared errors directly with the go-ceph
sentinel errors. This change uses the errors.Is() function of go
1.13 instead. The err113 linter reported this issue as:
err113: do not compare errors directly, use errors.Is() instead
Signed-off-by: Sven Anderson <sven@redhat.com>
"github.com/pkg/errors" does not offer more functionlity than that we
need from the standard "errors" package. With Golang v1.13 errors can be
wrapped with `fmt.Errorf("... %w", err)`. `errors.Is()` and
`errors.As()` are available as well.
See-also: https://tip.golang.org/doc/go1.13#error_wrapping
Signed-off-by: Niels de Vos <ndevos@redhat.com>
By fixing the golangci-lint runs, this now gets reported as a problem.
Instead of addressing the compexity of the DeleteVolume() method here,
mark it as a TODO.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
currently, various calls to deleteImage does not
need the rbdStatus check. That is only required
when calling from DeleteVolume. This PR optimizes the
rbd image deletion by removing the status check.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
added skipForceFlatten flag to skip
the image deptha and skip image flattening.
This will be very useful if the kernel is
not listed in cephcsi which supports deep
flatten fauture.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
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>
