NFS: Difference between revisions

FreeBSD

To set a FreeBSD machine up as a NFS server, add the following lines to /etc/rc.conf

mountd_enable="YES"
nfs_server_enable="YES"
rpcbind_enable="YES"
rpc_lockd_enable="YES"
rpc_statd_enable="YES"
mountd_flags="-r"

Since /storage is a single mount, you will need to define the same directories exactly the same for all the different permissions you want to define in /etc/exports. For example:

/storage/downloads /storage/backups/esxi -ro -network 10.1.1.0 -mask 255.255.255.0
/storage/downloads /storage/backups/esxi -maproot=root -network 10.1.1.2 -mask 255.255.255.255

It would be invalid if the second line had only /storage/downloads as it will cause the first entry to be ignored by the parser.

To apply your changes, restart mountd.

# service mountd restart

showmount should show both exports:

# showmount -e
Exports list on localhost:
/storage/downloads                 10.1.1.0 10.1.1.2
/storage/backups/esxi              10.1.1.0 10.1.1.2

Linux

Firewall

To use NFS, ensure the firewall is configured so that NFS, mountd, and RPC Bind can communicate.

# firewall-cmd --permanent --add-service=nfs
# firewall-cmd --permanent --add-service=mountd
# firewall-cmd --permanent --add-service=rpc-bind
# firewall-cmd --reload

NFSv4 ID Mapping

See: http://dfusion.com.au/wiki/tiki-index.php?page=Why+NFSv4+UID+mapping+breaks+with+AUTH_UNIX

Troubleshooting

`writing fd to kernel failed: errno 111`

If you get kernel errors similar to:

rpc.nfsd: writing fd to kernel failed: errno 111 (Connection refused)

You need to start the rpc.bind service.

# /etc/init.d/rpcbind start

fcntl() failed - No locks available

While attempting to get Dovecot with LDAP authentication working, I've ran into the following error:

dovecot: Feb 22 22:43:02 Error: IMAP(leo): fcntl() failed with file /home/leo/Maildir/dovecot.index.log: No locks available
dovecot: Feb 22 22:43:02 Error: IMAP(leo): mail_index_wait_lock_fd() failed with file /home/leo/Maildir/dovecot.index.log: No locks available

The /home directory is a automounted NFS share from a remote server. To resolve this issue, ensure that nfslock is running on both the server and client machine.

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@@ Line 1: / Line 1: @@
 == FreeBSD ==
 To set a FreeBSD machine up as a NFS server, add the following lines to {{code|/etc/rc.conf}}
-<syntaxhighlight lang="text" line start="1" enclose="div">
+{{highlight|lang=text|code=
 mountd_enable="YES"
 nfs_server_enable="YES"
@@ Line 10: / Line 9: @@
 rpc_statd_enable="YES"
 mountd_flags="-r"
-</syntaxhighlight>
+}}
 Since {{code|/storage}} is a single mount, you will need to define the same directories exactly the same for all the different permissions you want to define in {{code|/etc/exports}}. For example:
-<syntaxhighlight lang="text" line start="1" enclose="div">
+{{highlight|lang=text|code=
 /storage/downloads /storage/backups/esxi -ro -network 10.1.1.0 -mask 255.255.255.0
 /storage/downloads /storage/backups/esxi -maproot=root -network 10.1.1.2 -mask 255.255.255.255
-</syntaxhighlight>
+}}
 It would be '''invalid''' if the second line had only {{code|/storage/downloads}} as it will cause the first entry to be ignored by the parser.
@@ Line 23: / Line 22: @@
 To apply your changes, restart {{code|mountd}}.
-<syntaxhighlight lang="bash" line start="1" enclose="div">
+{{highlight|lang=text|code=
-service mountd restart
+# service mountd restart
-</syntaxhighlight>
+}}
 {{code|showmount}} should show both exports:
-<syntaxhighlight lang="bash" line start="1" enclose="div">
+{{highlight|lang=text|code=
-showmount -e
+# showmount -e
- Exports list on localhost:
+Exports list on localhost:
- /storage/downloads                 10.1.1.0 10.1.1.2
+/storage/downloads                 10.1.1.0 10.1.1.2
- /storage/backups/esxi              10.1.1.0 10.1.1.2
+/storage/backups/esxi              10.1.1.0 10.1.1.2
-</syntaxhighlight>
+}}
 == Linux ==
 === Firewall ===
+To use NFS, ensure the firewall is configured so that NFS, mountd, and RPC Bind can communicate.
 {{highlight|lang=terminal|code=
 # firewall-cmd --permanent --add-service=nfs
@@ Line 49: / Line 49: @@
 * See: http://dfusion.com.au/wiki/tiki-index.php?page=Why+NFSv4+UID+mapping+breaks+with+AUTH_UNIX
-=== Troubleshooting ===
+== Troubleshooting ==
- rpc.nfsd: writing fd to kernel failed: errno 111 (Connection refused)
+=== {{code|writing fd to kernel failed: errno 111}} ===
+If you get kernel errors similar to:
+{{highlight|lang=text|code=
+rpc.nfsd: writing fd to kernel failed: errno 111 (Connection refused)
+}}
+You need to start the {{code|rpc.bind}} service.
+{{highlight|lang=text|code=
+# /etc/init.d/rpcbind start
+}}
-You need to start rpc.bind
+=== fcntl() failed - No locks available ===
- /etc/init.d/rpcbind start
+While attempting to get Dovecot with LDAP authentication working, I've ran into the following error:
+{{highlight|lang=text|code=
+dovecot: Feb 22 22:43:02 Error: IMAP(leo): fcntl() failed with file /home/leo/Maildir/dovecot.index.log: No locks available
+dovecot: Feb 22 22:43:02 Error: IMAP(leo): mail_index_wait_lock_fd() failed with file /home/leo/Maildir/dovecot.index.log: No locks available
+}}
+The /home directory is a automounted NFS share from a remote server. To resolve this issue, ensure that nfslock is running on both the server and client machine.
 [[Category:FreeBSD]]
 {{Navbox Linux}}[[Category:Linux]]
 {{Navbox Services}}

NFS: Difference between revisions

Revision as of 03:22, 12 September 2019

FreeBSD

Linux

Firewall

NFSv4 ID Mapping

Troubleshooting

`writing fd to kernel failed: errno 111`

fcntl() failed - No locks available

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