[gentoo-user] Re: [~amd64] NFS server broken again :(

[walt <w41ter@gmail.com>]

On 10/27/2014 12:56 PM, Canek Peláez Valdés wrote:
> On Mon, Oct 27, 2014 at 1:38 PM, walt <w41ter@gmail.com> wrote:
>> Last night when I powered off my machines NFS was working perfectly.  Today
>> it's broken again for the nth time:
>>
>> #systemctl status nfs-server
>> ● nfs-server.service - NFS server and services
>>    Loaded: loaded (/usr/lib64/systemd/system/nfs-server.service; enabled)
>>    Active: failed (Result: exit-code) since Mon 2014-10-27 11:50:38 PDT; 25min ago
>>   Process: 896 ExecStopPost=/usr/sbin/exportfs -f (code=exited, status=0/SUCCESS)
>>   Process: 893 ExecStopPost=/usr/sbin/exportfs -au (code=exited, status=0/SUCCESS)
>>   Process: 939 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS (code=exited, status=1/FAILURE)
 
> I think I know the answer. Some days ago you moved /etc/conf.d for
> NetworkManager to work, right? Where does the environment variable
> RPCNFSDARGS is defined? I'm willing to bet that is in a /etc/conf.d
> file.
> 
> Could you please post here the contents of nfs-server.service, and if
> it exists, the files inside /etc/systemd/system/nfs-server.service.d
> and their contents?

Bingo again :)  Your question led me to the answer, which I think is a bug
in /usr/lib64/systemd/system/nfs-server.service.

Here's why the bug showed up just this morning:  way back at the beginning
of systemd I stole some .service files from RedHat Fedora, including one
named 'nfs.service'.

Turns out the foreign RedHat file was starting rpcbind for me all those
months and, when I deleted it last night, rpcbind didn't get started this
morning by nfs-server.service from gentoo (which I think is a bug).

#cat nfs-server.service 
[Unit]
Description=NFS server and services
Requires= network.target proc-fs-nfsd.mount rpcbind.target
Requires= nfs-mountd.service
Wants=rpc-statd.service nfs-idmapd.service rpc-gssd.service rpc-svcgssd.service
Wants=rpc-statd-notify.service

After= network.target proc-fs-nfsd.mount rpcbind.target nfs-mountd.service
After= nfs-idmapd.service rpc-statd.service
After= rpc-gssd.service rpc-svcgssd.service
Before= rpc-statd-notify.service

[Service]
EnvironmentFile=/etc/conf.d/nfs

Type=oneshot
RemainAfterExit=yes
ExecStartPre=/usr/sbin/exportfs -r
ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS
ExecStop=/usr/sbin/rpc.nfsd 0
ExecStopPost=/usr/sbin/exportfs -au
ExecStopPost=/usr/sbin/exportfs -f

ExecReload=/usr/sbin/exportfs -r

[Install]
WantedBy=multi-user.target


I can see that rpcbind.target is Required, but NOT rpcbind.service. AFAICT
rpc.target does nothing (please explain if I'm wrong about that).


BTW, /etc/conf.d/nfs doesn't define RPCNFSDARGS because it is intended
for use by openrc (another bug?):

#cat /etc/conf.d/nfs
# /etc/conf.d/nfs

# If you wish to set the port numbers for lockd,
# please see /etc/sysctl.conf

# Optional services to include in default `/etc/init.d/nfs start`
# For NFSv4 users, you'll want to add "rpc.idmapd" here.
NFS_NEEDED_SERVICES="rpc.idmapd"

# Number of servers to be started up by default
OPTS_RPC_NFSD="8"

# Options to pass to rpc.mountd
# ex. OPTS_RPC_MOUNTD="-p 32767"
OPTS_RPC_MOUNTD=""

# Options to pass to rpc.statd
# ex. OPTS_RPC_STATD="-p 32765 -o 32766"
OPTS_RPC_STATD=""

# Options to pass to rpc.idmapd
OPTS_RPC_IDMAPD=""

# Options to pass to rpc.gssd
OPTS_RPC_GSSD=""

# Options to pass to rpc.svcgssd
OPTS_RPC_SVCGSSD=""

# Options to pass to rpc.rquotad (requires sys-fs/quota)
OPTS_RPC_RQUOTAD=""

# Timeout (in seconds) for exportfs
EXPORTFS_TIMEOUT=30

# Options to set in the nfsd filesystem (/proc/fs/nfsd/).
# Format is <option>=<value>.  Multiple options are allowed.
#OPTS_NFSD="nfsv4leasetime=30 max_block_size=4096"


Thanks Canek!