Linux kernel 4.17.0 adds support for quota with CephFS. Without quota,
it is not possible to fullfill the requirements of the CSI Spec and
guarantee sufficient space on the filesystem for a volume. With this in
mind, usage of the kernel client is only allowed with kernel 4.17.0 or
newer.
However, some Linux vendors backport features and patches to their
Enterprise products. These kernels may have an older version, but do
support quota. One of these is the kernel that comes with RHEL-7.7.
By comparing the current running version of the Linux kernel against
known versions that support quota, we can now automatically decide to
use the kernel client, or not.
Note that this does not change the 'forcekernelclient' parameter. The
parameter is still available and can be used for kernels that are not in
the 'known to support quota list'. Or users can pass the parameter to
use a CephFS kernel client that does not support quota.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This will be helpful if someone wants
to check the cephcsi version
output
```
docker run quay.io/cephcsi/cephcsi:v1.2.1 --version
Cephcsi Version: v1.2.1
Git Commit: 4b871366327d63e27fc1abfb699f0faaf0fc16b9
GoVersion: go1.12.5
Compiler: gc
Platform: linux/amd64
```
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
If the RBD user does not have permissions to talk to the
Ceph MGR, it should gracefully fallback to the slower foreground
image deletion.
Fixes: #677
Signed-off-by: Jason Dillaman <dillaman@redhat.com>
Skip zeroing of the journal on freshly created images. As only dynamic
PVs are supported, it is fine to assume that existingFormat == "" image
has never been mapped and written to before.
lazy_itable_init is enabled by default, passing it for consistency with
lazy_journal_init.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Currently rbd CSI plugin uses formatAndMount of
mount.SafeFormatAndMount. This does not allow to pass or use
specific formatting arguments with it. This patch introduce
RBD specific formatting options with both xfs and ext4,
for example: -E no-discard with ext4 and -k option with
XFS to boost formatting performance of RBD device.
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
The storage class already takes MountOptions(MountFlags), these are the
bind mount options. Some of these options may not be recognised by the
cephfs mount. Hence added a new parameterin Storage Class for
- cephfs kernel mount options,
- ceph-fuse mount options
Ceph kernel mount options are different from ceph-fuse options, hence
added two different parameters.
Signed-off-by: Poornima G <pgurusid@redhat.com>
Ceph kernel client is more performant than ceph fuse client.
The kernel client has Quota support only in the kernel version >=4.17.
Hence use ceph kernel client when the kernel version is >=4.17.
Signed-off-by: Poornima G <pgurusid@redhat.com>
Sometime rbd images are mapped even if the
connection timeout error occurs, this will
try to unmap if the received error message
is connection timeout.This will fix stale maps
and rbd image deletion issue
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
if both controller and nodeserver flags are set/unset
cephcsi will start both server,
if only one flag is set, it will start relavent
service.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This will help user to check whats
the actual error. if the config file
is having issue or the clusterid is
not valid.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
Image deletion takes time proportional to the size of the
image. Hence, ceph manager is enhanced to support async
deletion of an image, or rather passing the task of
deleting an image to the ceph manager.
This commit leverages the ceph manager enhancement in the CSI code.
NOTE: This is tested against a ceph cluster that is running
Ceph master version of the code. Once other releases
catch up in terms of the feature, the optimization would be
available to the CSI driver as well.
Fixes: #523
Signed-off-by: ShyamsundarR <srangana@redhat.com>
The container runtime CRI-O limits the number of PIDs to 1024 by
default. When many PVCs are requested at the same time, it is possible
for the provisioner to start too many threads (or go routines) and
executing 'rbd' commands can start to fail. In case a go routine can not
get started, the process panics.
The PID limit can be changed by passing an argument to kubelet, but this
will affect all pids running on a host. Changing the parameters to
kubelet is also not a very elegant solution.
Instead, the provisioner pod can change the configuration itself. The
pod is running in privileged mode and can write to /sys/fs/cgroup where
the limit is configured.
With this change, the limit is configured to 'max', just as if there is
no limit at all. The logs of the csi-rbdplugin in the provisioner pod
will reflect the change it makes when starting the service:
$ oc -n rook-ceph logs -c csi-rbdplugin csi-rbdplugin-provisioner-0
..
I0726 13:59:19.737678 1 cephcsi.go:127] Initial PID limit is set to 1024
I0726 13:59:19.737746 1 cephcsi.go:136] Reconfigured PID limit to -1 (max)
..
It is possible to pass a different limit on the commandline of the
cephcsi executable. The following flag has been added:
--pidlimit=<int> the PID limit to configure through cgroups
This accepts special values -1 (max) and 0 (default, do not
reconfigure). Other integers will be the limit that gets configured in
cgroups.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
In unstage we now adhere to the transaction (or order of steps)
done in Stage. To enable this we stash the image meta data
into a local file on the staging path for use with unstage
request.
This helps in unmapping a stale map, in case the mount or
other steps in the transaction are complete.
Signed-off-by: ShyamsundarR <srangana@redhat.com>
This change also starts mapping nbd based access using ther rbd CLI
as, it is a prerequisite to get device listing for nbd as well.
Signed-off-by: ShyamsundarR <srangana@redhat.com>
This commit moves the mounting of a block volumes and filesystems
to a sub-file (already the case) or a sub-dir within the staging
path.
This enables using the staging path to store any additional data
regarding the mount. For example, this will be extended in the
future to store the fsid of the cluster, and maybe the pool name
to map unmap requests to the right image.
Also, this fixes the noted hack in the code, to determine in a
common manner if there is a mount on the passed in staging path.
Signed-off-by: ShyamsundarR <srangana@redhat.com>
once we map the rbd image on a node
we will get the device name its mapped
in the map output itself,no need to
check the devicepath post rbd mapping
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
It's CO responsibility to create the
stagingPath as per the CSI spec.
The CO SHALL ensure
// that the path is directory and that the process serving the
// request has `read` and `write` permission to that directory. The
// CO SHALL be responsible for creating the directory if it does not
// exist.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
... and not that of the FS subvolume group `csi`.
There is no reason for setting the mode of FS subvolume group `csi`
(a CephFS subdirectory) as 777. It's default mode is 755. It's
sufficient to set the mode of FS subvolumes within the subvolume group
to `777`.
Signed-off-by: Ramana Raja <rraja@redhat.com>
... instead of that of the `csi` subvolume group. The pool layout
specified via storage class's `pool` setting is a subvolume property
and not a subvolume group property. The `csi` subvolume group
may have subvolumes of different storage classes with different
pool layouts.
Fixes: #499
Signed-off-by: Ramana Raja <rraja@redhat.com>
