nfs v3 test (by quqi99)

Posted 2021-09-14 quqi99

作者：张华 发表于：2021-08-28
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(http://blog.csdn.net/quqi99 )

刚工作需要做了一个nfs v3的测试，记录一下。

# set up nfs v3 server
sudo apt-get install nfs-kernel-server -y
cat <<EOF | sudo tee -a /etc/exports
/nfs *(rw,sync,no_subtree_check)
EOF
sudo mkdir -p /nfs && sudo chown -R $USER /nfs/
sudo systemctl restart nfs-server

# set up nfs client
showmount -e node1
sudo mkdir -p /mnt/nfs && sudo chown -R $USER /mnt/nfs/
sudo mount -t nfs -o vers=3,proto=tcp,nolock node1:/nfs /mnt/nfs

# prepare backing file
mkdir -p /nfs/images && sudo cp -v /images/kvm/bionic.qcow2 /nfs/images/
chmod 777 /nfs/image/bionic.qcow2

# create two snapshots on the same backing file hosted in NFSv3 server
qemu-img create -f qcow2 -o backing_file=/mnt/nfs/image2/bionic.qcow2 /mnt/nfs/image2/bionic-snap.qcow2
chmod 777 /mnt/nfs/image2/bionic-snap.qcow2
qemu-img create -f qcow2 -o backing_file=/mnt/nfs/image2/bionic.qcow2 /mnt/nfs/image2/bionic-snap2.qcow2
chmod 777 /mnt/nfs/image2/bionic-snap2.qcow2

# create two test VMs with two snapshots

# run dd command on one VM, then restart another VM, but my both VMs run well so I didn't reproduce the problem.


do test with sparse file test with: dd if=/dev/zero of=flat2.img bs=1024k count=0 seek=2048

do test with non-sparse file test with: dd if=/dev/zero of=flat1.img bs=1024k count=1000

[1] https://sq.sf.163.com/blog/article/218146701477384192