ESXI 6.7 client creating Thick Eager zeroed vmdk files using ceph fsal
by Robert Toole
Hi,
I have a 3 node Ceph octopus 15.2.7 cluster running on fully up to date
Centos 7 with nfs-ganesha 3.5.
After following the Ceph install guide
https://docs.ceph.com/en/octopus/cephadm/install/#deploying-nfs-ganesha
I am able to create a NFS 4.1 Datastore in vmware using the ip address
of all three nodes. Everything appears to work OK..
The issue however is that for some reason esxi is creating thick
provisioned eager zeroed disks instead of thin provisioned disks on this
datastore, whether I am migrating, cloning, or creating new vms. Even
running vmkfstools -i disk.vmdk -d thin thin_disk.vmdk still results in
a thick eager zeroed vmdk file.
This should not be possible on an NFS datastore, because vmware requires
a VAAI NAS plugin to accomplish thick provisioning over NFS before it
can thick provision disks.
Linux clients to the same datastore can create thin qcow2 images, and
when looking at the images created by esxi from the linux hosts you can
see that the vmdks are indeed thick:
ls -lsh
total 81G
512 -rw-r--r--. 1 root root 230 Mar 25 15:17 test_vm-2221e939.hlog
40G -rw-------. 1 root root 40G Mar 25 15:17 test_vm-flat.vmdk
40G -rw-------. 1 root root 40G Mar 25 15:56 test_vm_thin-flat.vmdk
512 -rw-------. 1 root root 501 Mar 25 15:57 test_vm_thin.vmdk
512 -rw-------. 1 root root 473 Mar 25 15:17 test_vm.vmdk
0 -rw-r--r--. 1 root root 0 Jan 6 1970 test_vm.vmsd
2.0K -rwxr-xr-x. 1 root root 2.0K Mar 25 15:17 test_vm.vmx
but the qcow2 files from the linux hosts are thin as one would expect:
qemu-img create -f qcow2 big_disk_2.img 500G
ls -lsh
total 401K
200K -rw-r--r--. 1 root root 200K Mar 25 15:47 big_disk_2.img
200K -rw-r--r--. 1 root root 200K Mar 25 15:44 big_disk.img
512 drwxr-xr-x. 2 root root 81G Mar 25 15:57 test_vm
These ls -lsh results are the same from esx, linux nfs clients and from
cephfs kernel client.
What is happening here? Are there undocumented VAAI features in
nfs-ganesha with the cephfs fsal ? If so, how do I turn them off ? I
want thin provisioned disks.
ceph nfs export ls dev-nfs-cluster --detailed
[
{
"export_id": 1,
"path": "/Development-Datastore",
"cluster_id": "dev-nfs-cluster",
"pseudo": "/Development-Datastore",
"access_type": "RW",
"squash": "no_root_squash",
"security_label": true,
"protocols": [
4
],
"transports": [
"TCP"
],
"fsal": {
"name": "CEPH",
"user_id": "dev-nfs-cluster1",
"fs_name": "dev_cephfs_vol",
"sec_label_xattr": ""
},
"clients": []
}
]
rpm -qa | grep ganesha
nfs-ganesha-ceph-3.5-1.el7.x86_64
nfs-ganesha-rados-grace-3.5-1.el7.x86_64
nfs-ganesha-rados-urls-3.5-1.el7.x86_64
nfs-ganesha-3.5-1.el7.x86_64
centos-release-nfs-ganesha30-1.0-2.el7.centos.noarch
rpm -qa | grep ceph
python3-cephfs-15.2.7-0.el7.x86_64
nfs-ganesha-ceph-3.5-1.el7.x86_64
python3-ceph-argparse-15.2.7-0.el7.x86_64
python3-ceph-common-15.2.7-0.el7.x86_64
cephadm-15.2.7-0.el7.x86_64
libcephfs2-15.2.7-0.el7.x86_64
ceph-common-15.2.7-0.el7.x86_64
ceph -v
ceph version 15.2.7 (<ceph_uuid>) octopus (stable)
The ceph cluster is healthy using bluestore on raw 3.84TB sata 7200 rpm
disks.
--
Robert Toole
rtoole(a)tooleweb.ca
403 368 5680
2 weeks, 2 days
Announce Push of V4-rc3
by Frank Filz
Branch next
Tag:V4-rc3
Ganesha V4.0 is in sight!
Merge Highlights
* Keep pidfile locked while running
Signed-off-by: Frank S. Filz <ffilzlnx(a)mindspring.com>
Contents:
a4969e3d6 Frank S. Filz V4-rc3
ba923ef21 Olivier Garaud Keep pidfile locked while running
3 years, 2 months
proxyv3_getfd_blocking :FSAL :CRIT :Failed to ever acquire a new fd, dying
by Matthew Hess
I've set:
LimitAS=infinity
LimitRSS=infinity
LimitCORE=infinity
LimitNOFILE=infinity
in /usr/lib/systemd/system/nfs-ganesha.service and reloaded it then
restarted the service but I keep hitting that error when writing large
files.
I'm using last night's next branch and built rpms from that.
3 years, 2 months
having issues with setting up nfs-ganesha
by Matthew Hess
I'm currently using the centos 7 distribution and the centos-nfs-ganesha30
repo:
# rpm -q -a | grep nfs-ganesha
nfs-ganesha-vfs-3.5-2.el7.x86_64
nfs-ganesha-3.5-2.el7.x86_64
nfs-ganesha-proxy-3.5-2.el7.x86_64
centos-release-nfs-ganesha30-1.0-2.el7.centos.noarch
I've come across a strange need to get a nfsv3 share on a netapp talking
with a client that only understands nfsv4. I think I'm heading in the right
direction here but I'm having some trouble getting this setup for testing.
In the log I am getting:
init_export_root :EXPORT :CRIT :Lookup failed on path, ExportId=20
Path=/prod FSAL_ERROR=(Permission denied,13)
and it appears to give up on the /prod share
my export config is:
EXPORT {
Export_Id = 20;
Path = "/prod";
Pseudo = "/prod";
Access_Type = RW;
Squash = No_Root_Squash;
Transports = "TCP";
FSAL {
Name = proxy;
Srv_Addr = <netapp ip>;
Use_Privileged_Client_Port = false;
}
}
I am able to mount the netapp share from this same system and manage the
content of the share:
mount -v -t nfs -o proto=tcp,vers=3,nolock <netapp ip>:/prod /prod
not certain what I'm doing wrong, can anyone clue me in?
3 years, 2 months
