1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
.\"
.\" statd(8)
.\"
.\" Copyright (C) 1999 Olaf Kirch <okir@monad.swb.de>
.\" Modified by Jeffrey A. Uphoff, 1999, 2002, 2005.
.\" Modified by Lon Hohberger, 2000.
.\" Modified by Paul Clements, 2004.
.TH rpc.statd 8 "31 Aug 2004"
.SH NAME
rpc.statd \- NSM status monitor
.SH SYNOPSIS
.B "/sbin/rpc.statd [-F] [-d] [-?] [-n " name "] [-o " port "] [-p " port "] [-H " prog "] [-V]"
.SH DESCRIPTION
The
.B rpc.statd
server implements the NSM (Network Status Monitor) RPC protocol.
This service is somewhat misnamed, since it doesn't actually provide
active monitoring as one might suspect; instead, NSM implements a
reboot notification service. It is used by the NFS file locking service,
.BR rpc.lockd ,
to implement lock recovery when the NFS server machine crashes and
reboots.
.SS Operation
For each NFS client or server machine to be monitored,
.B rpc.statd
creates a file in
.BR /var/lib/nfs/sm .
When starting, it iterates through these files and notifies the
peer
.B rpc.statd
on those machines.
.SH OPTIONS
.TP
.B -F
By default,
.B rpc.statd
forks and puts itself in the background when started. The
.B -F
argument tells it to remain in the foreground. This option is
mainly for debugging purposes.
.TP
.B -d
By default,
.B rpc.statd
sends logging messages via
.BR syslog (3)
to system log. The
.B -d
argument forces it to log verbose output to
.B stderr
instead. This option is mainly for debugging purposes, and may only
be used in conjunction with the
.B -F
parameter.
.TP
.BI "\-n," "" " \-\-name " name
specify a name for
.B rpc.statd
to use as the local hostname. By default,
.BR rpc.statd
will call
.BR gethostname (2)
to get the local hostname. Specifying
a local hostname may be useful for machines with more than one
interfaces.
.TP
.BI "\-o," "" " \-\-outgoing\-port " port
specify a port for
.B rpc.statd
to send outgoing status requests from. By default,
.BR rpc.statd
will ask
.BR portmap (8)
to assign it a port number. As of this writing, there is not
a standard port number that
.BR portmap
always or usually assigns. Specifying
a port may be useful when implementing a firewall.
.TP
.BI "\-p," "" " \-\-port " port
specify a port for
.B rpc.statd
to listen on. By default,
.BR rpc.statd
will ask
.BR portmap (8)
to assign it a port number. As of this writing, there is not
a standard port number that
.BR portmap
always or usually assigns. Specifying
a port may be useful when implementing a firewall.
.TP
.BI "\-P," "" " \-\-state\-directory\-path " directory
specify a directory in which to place statd state information.
If this option is not specified the default of
.BR /var/lib/nfs
is used.
.TP
.B -N
Causes statd to run in the notify-only mode. When started in this mode, the
statd program will check its state directory, send notifications to any
monitored nodes, and exit once the notifications have been sent. This mode is
used to enable Highly Available NFS implementations (i.e. HA-NFS).
.TP
.BI "\-H, " "" " \-\-ha-callout " prog
Specify a high availability callout program, which will receive callouts
for all client monitor and unmonitor requests. This allows
.B rpc.statd
to be used in a High Availability NFS (HA-NFS) environment. The
program will be run with 3 arguments: The first is either
.B add-client
or
.B del-client
depending on the reason for the callout.
The second will be the name of the client.
The third will be the name of the server as known to the client.
.TP
.B -?
Causes
.B rpc.statd
to print out command-line help and exit.
.TP
.B -V
Causes
.B rpc.statd
to print out version information and exit.
.SH TCP_WRAPPERS SUPPORT
This
.B rpc.statd
version is protected by the
.B tcp_wrapper
library. You have to give the clients access to
.B rpc.statd
if they should be allowed to use it. To allow connects from clients of
the .bar.com domain you could use the following line in /etc/hosts.allow:
statd: .bar.com
You have to use the daemon name
.B statd
for the daemon name (even if the binary has a different name).
For further information please have a look at the
.BR tcpd (8)
and
.BR hosts_access (5)
manual pages.
.SH SIGNALS
.BR SIGUSR1
causes
.B rpc.statd
to re-read the notify list from disk
and send notifications to clients. This can be used in High Availability NFS
(HA-NFS) environments to notify clients to reacquire file locks upon takeover
of an NFS export from another server.
.SH FILES
.BR /var/lib/nfs/state
.br
.BR /var/lib/nfs/sm/*
.br
.BR /var/lib/nfs/sm.bak/*
.SH SEE ALSO
.BR rpc.nfsd(8),
.BR portmap(8)
.SH AUTHORS
.br
Jeff Uphoff <juphoff@users.sourceforge.net>
.br
Olaf Kirch <okir@monad.swb.de>
.br
H.J. Lu <hjl@gnu.org>
.br
Lon Hohberger <hohberger@missioncriticallinux.com>
.br
Paul Clements <paul.clements@steeleye.com>
|
