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84394c0219
Make it easier to run a live lvmetad in debugging mode and to avoid conflicts if multiple test instances need to be run alongside a live one. No longer require -s when -f is used: use built-in default. Add -p to lvmetad to specify the pid file. No longer disable pidfile if -f used to run in foreground. If specified socket file appears to be genuine but stale, remove it before use. On error, only remove lvmetad socket file if created by the same process. (Previous code removes socket even while a running instance is using it!)
72 lines
2.1 KiB
Groff
72 lines
2.1 KiB
Groff
.TH LVMETAD 8 "LVM TOOLS #VERSION#" "Red Hat Inc" \" -*- nroff -*-
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.SH NAME
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lvmetad \- LVM metadata cache daemon
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.SH SYNOPSIS
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.B lvmetad
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.RB [ \-l
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.RI {all|wire|debug}
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.RB ]
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.RB [ \-p
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.RI pidfile_path
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.RB ]
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.RB [ \-s
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.RI socket_path
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.RB ]
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.RB [ \-f ]
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.RB [ \-h ]
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.RB [ \-V ]
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.RB [ \-? ]
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.SH DESCRIPTION
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lvmetad is a metadata caching daemon for LVM. The daemon receives notifications
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from udev rules (which must be installed for LVM to work correctly when lvmetad
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is in use). Through these notifications, lvmetad has an up-to-date and
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consistent image of the volume groups available in the system.
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By default, lvmetad, even if running, is not used by LVM. See \fBlvm.conf\fP(5).
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.SH OPTIONS
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To run the daemon in a test environment both the pidfile_path and the
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socket_path should be changed from the defaults.
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.TP
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.B \-f
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Don't fork, but run in the foreground.
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.TP
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.BR \-h ", " \-?
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Show help information.
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.TP
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.BR \-l " {" \fIall | \fIwire | \fIdebug }
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Select the type of log messages to generate.
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Messages are logged by syslog.
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Additionally, when -f is given they are also sent to standard error.
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Since release 2.02.98, there are two classes of messages: wire and debug.
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Selecting 'all' supplies both and is equivalent to a comma-separated list
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-l wire,debug.
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Prior to release 2.02.98, repeating -d from 1 to 3 times, viz. -d, -dd, -ddd,
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increased the detail of messages.
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.TP
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.B \-p \fIpidfile_path
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Path to the pidfile. This overrides both the built-in default
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(#DEFAULT_PID_DIR#/lvmetad.pid) and the environment variable
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\fBLVM_LVMETAD_PIDFILE\fP. This file is used to prevent more
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than one instance of the daemon running simultaneously.
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.TP
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.B \-s \fIsocket_path
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Path to the socket file. This overrides both the built-in default
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(#DEFAULT_RUN_DIR#/lvmetad.socket) and the environment variable
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\fBLVM_LVMETAD_SOCKET\fP. To communicate successfully with lvmetad,
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all LVM2 processes should use the same socket path.
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.TP
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.B \-V
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Display the version of lvmetad daemon.
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.SH ENVIRONMENT VARIABLES
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.TP
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.B LVM_LVMETAD_PIDFILE
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Path for the pid file.
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.TP
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.B LVM_LVMETAD_SOCKET
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Path for the socket file.
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.SH SEE ALSO
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.BR lvm (8),
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.BR lvm.conf (5)
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