main-netns.sh

#!/bin/bash
#ref: https://packetpushers.net/multipathing-nfs4-1-kvm

. /usr/lib/bash/libtest || { echo "{ERROR} 'kiss-vm-ns' is required, please install it first" >&2; exit 2; }
[[ $(id -u) != 0 ]] && { echo "{ERROR} this test need run as root." >&2; exit 2; }

faillog() { echo -e "\033[41m{TEST:FAIL} $*\033[0m"; }

ServerIP1=192.168.6.1
ClientIP1=192.168.6.2
ServerIP2=192.168.7.1
ClientIP2=192.168.7.2

ExportDir=/nfsshare
MountPoint=/mnt/netns0/nfs
MOUNT_OPTS="$*"
MOUNT_OPTS=${MOUNT_OPTS:--onosharecache,nconnect=16}

systemctl stop firewalld
mkdir -p $ExportDir $MountPoint
touch $ExportDir/testfile
echo "$ExportDir *(rw,no_root_squash,insecure,security_label)" >/etc/exports
systemctl restart nfs-server

netns 2>/dev/null
netns host,veth1.X,$ServerIP1---netns0,veth1.Y,$ClientIP1  host,veth2.X,$ServerIP2---netns0,veth2.Y,$ClientIP2
netns exec -vx0 netns0 -- showmount -e $ServerIP1
netns exec -vx0 netns0 -- mount $ServerIP1:$ExportDir $MountPoint $MOUNT_OPTS
netns exec -vx0 netns0 -- showmount -e $ServerIP2
netns exec -vx0 netns0 -- mount $ServerIP2:$ExportDir $MountPoint $MOUNT_OPTS
netns exec -v   netns0 -- mount -t nfs,nfs4

netns exec -v   netns0 -- cat /proc/self/mountstats
netns exec -v   netns0 -- grep xprt /proc/self/mountstats
netns exec -v   netns0 -- ss -nt "dst $ServerIP1"
netns exec -v   netns0 -- ss -nt "dst $ServerIP2"

netns exec -vx0 netns0 -- umount -t nfs,nfs4 -a
netns exec -v   netns0 -- mount -t nfs,nfs4

#please clean test env:
netns del netns0