Setup NFS Server on LXC in Proxmox

Quick tutorial on how i setup NFS server on Proxmox using LXC rather than the old OpenVZ. Before i began writing out my old tutorial on NFS, you can take a look at the instruction on OpenVZ NFS which is exactly the same. I will write out a quick one here.

NFS Server on LXC

Do the following instruction to install NFS server (i'm using Centos btw)

yum install nfs* -y
service rpcbind start
chkconfig rpcbind on
service nfs start
chkconfig nfs on
Starting NFS services:                                     [  OK  ]
Starting NFS quotas:                                       [  OK  ]
Starting NFS mountd:                                       [  OK  ]
Starting NFS daemon: rpc.nfsd: Unable to access /proc/fs/nfsd errno 2 (No such file or directory).
Please try, as root, 'mount -t nfsd nfsd /proc/fs/nfsd' and then restart rpc.nfsd to correct the problem
                                                           [FAILED]

Failure is part of the plan. Now, assuming your LXC is on 101, you will go to /etc/pve/lxc/101.conf and add the following line

arch: amd64
cpulimit: 4
cpuunits: 1024
hostname: nfs.localhost.com
memory: 4000
nameserver: 8.8.8.8 8.8.4.4
net0: bridge=vmbr2,gw=192.168.100.1,hwaddr=32:36:30:61:61:34,ip=192.168.100.3/24,name=eth0,type=veth
onboot: 1
ostype: centos
rootfs: local:101/vm-101-disk-1.raw,size=1000G
searchdomain: localhost
swap: 512
lxc.aa_profile: unconfined

I will show you what i added, which is

lxc.aa_profile: unconfined

and also remember to add the line to /var/lib/lxc/101/config

lxc.aa_profile=unconfined

remember to reboot your LXC or else it won't work.

Now, in your LXC, open the file /etc/exports

/mnt/nfs     *(rw,no_root_squash,no_subtree_check,fsid=0)

and add the above line. remember to create the folder /mnt/nfs

Enable Port on Firewall

Enable the following in iptables

-A PREROUTING -d 10.6.25.101/32 -i vmbr0 -p tcp -m tcp --dport 2925 -j DNAT --to-destination 192.168.0.111:22
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p tcp -m tcp --dport 32803 -j DNAT --to-destination 192.168.0.111:32803
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p tcp -m tcp --dport 892 -j DNAT --to-destination 192.168.0.111:892
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p tcp -m tcp --dport 662 -j DNAT --to-destination 192.168.0.111:662
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p tcp -m tcp --dport 2049 -j DNAT --to-destination 192.168.0.111:2049
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p tcp -m tcp --dport 111 -j DNAT --to-destination 192.168.0.111:111
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p udp -m udp --dport 892 -j DNAT --to-destination 192.168.0.111:892
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p udp -m udp --dport 662 -j DNAT --to-destination 192.168.0.111:662
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p udp -m udp --dport 111 -j DNAT --to-destination 192.168.0.111:111
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p udp -m udp --dport 2049 -j DNAT --to-destination 192.168.0.111:2049
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p udp -m udp --dport 32769 -j DNAT --to-destination 192.168.0.111:32769
-A PREROUTING -d 10.6.25.101/32 -i vmbr1 -p tcp -m tcp --dport 8000 -j DNAT --to-destination 192.168.0.111:8000

where 10.6.25.101 is public ip and 192.168.0.111 is lxc ip address.

Configure NFS

Head over to /etc/sysconfig/nfs and update the following

#
# Define which protocol versions mountd
# will advertise. The values are "no" or "yes"
# with yes being the default
#MOUNTD_NFS_V2="no"
MOUNTD_NFS_V3="yes"
#
#
# Path to remote quota server. See rquotad(8)
#RQUOTAD="/usr/sbin/rpc.rquotad"
# Port rquotad should listen on.
#RQUOTAD_PORT=875
# Optinal options passed to rquotad
#RPCRQUOTADOPTS=""
#
#
# Optional arguments passed to in-kernel lockd
#LOCKDARG=
# TCP port rpc.lockd should listen on.
LOCKD_TCPPORT=32803
# UDP port rpc.lockd should listen on.
LOCKD_UDPPORT=32769
#
#
# Optional arguments passed to rpc.nfsd. See rpc.nfsd(8)
# Turn off v2 and v3 protocol support
#RPCNFSDARGS="-N 2 -N 3"
# Turn off v4 protocol support
RPCNFSDARGS="-N 4"
# Number of nfs server processes to be started.
# The default is 8.
#RPCNFSDCOUNT=8
# Stop the nfsd module from being pre-loaded
NFSD_MODULE="noload"
# Set V4 and NLM grace periods in seconds
#
# Warning, NFSD_V4_GRACE should not be less than
# NFSD_V4_LEASE was on the previous boot.
#
# To make NFSD_V4_GRACE shorter, with active v4 clients,
# first make NFSD_V4_LEASE shorter, then restart server.
# This will make the clients aware of the new value.
# Then NFSD_V4_GRACE can be decreased with another restart.
#
# When there are no active clients, changing these values
# can be done in a single server restart.
#
#NFSD_V4_GRACE=90
#NFSD_V4_LEASE=90
#NLM_GRACE_PERIOD=90
#
#
#
# Optional arguments passed to rpc.mountd. See rpc.mountd(8)
#RPCMOUNTDOPTS=""
# Port rpc.mountd should listen on.
MOUNTD_PORT=892
#
#
# Optional arguments passed to rpc.statd. See rpc.statd(8)
#STATDARG=""
# Port rpc.statd should listen on.
STATD_PORT=662
# Outgoing port statd should used. The default is port
# is random
#STATD_OUTGOING_PORT=2020
# Specify callout program
#STATD_HA_CALLOUT="/usr/local/bin/foo"
#
#
# Optional arguments passed to rpc.idmapd. See rpc.idmapd(8)
#RPCIDMAPDARGS=""
#
# Set to turn on Secure NFS mounts.
#SECURE_NFS="yes"
# Optional arguments passed to rpc.gssd. See rpc.gssd(8)
#RPCGSSDARGS=""
# Optional arguments passed to rpc.svcgssd. See rpc.svcgssd(8)
#RPCSVCGSSDARGS=""
#
# To enable RDMA support on the server by setting this to
# the port the server should listen on
#RDMA_PORT=20049

once you have done all the above, restart your host machine so you are clean and good to go.

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