221 lines
6.1 KiB
Groff
221 lines
6.1 KiB
Groff
.\" Copyright (c) 2010 The FreeBSD Foundation
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This software was developed by Pawel Jakub Dawidek under sponsorship from
|
|
.\" the FreeBSD Foundation.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 10, 2011
|
|
.Dt HASTCTL 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm hastctl
|
|
.Nd "Highly Available Storage control utility"
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Cm create
|
|
.Op Fl d
|
|
.Op Fl c Ar config
|
|
.Op Fl e Ar extentsize
|
|
.Op Fl k Ar keepdirty
|
|
.Op Fl m Ar mediasize
|
|
.Ar name ...
|
|
.Nm
|
|
.Cm role
|
|
.Op Fl d
|
|
.Op Fl c Ar config
|
|
.Aq init | primary | secondary
|
|
.Ar all | name ...
|
|
.Nm
|
|
.Cm status
|
|
.Op Fl d
|
|
.Op Fl c Ar config
|
|
.Op Ar all | name ...
|
|
.Nm
|
|
.Cm dump
|
|
.Op Fl d
|
|
.Op Fl c Ar config
|
|
.Op Ar all | name ...
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility is used to control the behaviour of the
|
|
.Xr hastd 8
|
|
daemon.
|
|
.Pp
|
|
This utility should be used by HA software like
|
|
.Nm heartbeat
|
|
or
|
|
.Nm ucarp
|
|
to setup HAST resources role when changing from primary mode to
|
|
secondary or vice versa.
|
|
Be aware that if a file system like UFS exists on HAST provider and
|
|
primary node dies, file system has to be checked for inconsistencies
|
|
with the
|
|
.Xr fsck 8
|
|
utility after switching secondary node to primary role.
|
|
.Pp
|
|
The first argument to
|
|
.Nm
|
|
indicates an action to be performed:
|
|
.Bl -tag -width ".Cm create"
|
|
.It Cm create
|
|
Initialize local provider configured for the given resource.
|
|
Additional options include:
|
|
.Bl -tag -width ".Fl e Ar extentsize"
|
|
.It Fl e Ar extentsize
|
|
Size of an extent.
|
|
Extent is a block which is used for synchronization.
|
|
.Xr hastd 8
|
|
maintains a map of dirty extents and extent is the smallest region that
|
|
can be marked as dirty.
|
|
If any part of an extent is modified, entire extent will be synchronized
|
|
when nodes connect.
|
|
If extent size is too small, there will be too much disk activity
|
|
related to dirty map updates, which will degrade performance of the
|
|
given resource.
|
|
If extent size is too large, synchronization, even in case of short
|
|
outage, can take a long time increasing the risk of losing up-to-date
|
|
node before synchronization process is completed.
|
|
The default extent size is
|
|
.Va 2MB .
|
|
.It Fl k Ar keepdirty
|
|
Maximum number of dirty extents to keep dirty all the time.
|
|
Most recently used extents are kept dirty to reduce number of metadata
|
|
updates.
|
|
The default number of most recently used extents which will be kept
|
|
dirty is
|
|
.Va 64 .
|
|
.It Fl m Ar mediasize
|
|
Size of the smaller provider used as backend storage on both nodes.
|
|
This option can be omitted if node providers have the same size on both
|
|
sides.
|
|
.El
|
|
.Pp
|
|
If size is suffixed with a k, M, G or T, it is taken as a kilobyte,
|
|
megabyte, gigabyte or terabyte measurement respectively.
|
|
.It Cm role
|
|
Change role of the given resource.
|
|
The role can be one of:
|
|
.Bl -tag -width ".Cm secondary"
|
|
.It Cm init
|
|
Resource is turned off.
|
|
.It Cm primary
|
|
Local
|
|
.Xr hastd 8
|
|
daemon will act as primary node for the given resource.
|
|
System on which resource role is set to primary can use
|
|
.Pa /dev/hast/<name>
|
|
GEOM provider.
|
|
.It Cm secondary
|
|
Local
|
|
.Xr hastd 8
|
|
daemon will act as secondary node for the given resource - it will wait
|
|
for connection from the primary node and will handle I/O requests
|
|
received from it.
|
|
GEOM provider
|
|
.Pa /dev/hast/<name>
|
|
will not be created on secondary node.
|
|
.El
|
|
.It Cm status
|
|
Present status of the configured resources.
|
|
.It Cm dump
|
|
Dump metadata stored on local component for the configured resources.
|
|
.El
|
|
.Pp
|
|
In addition, every subcommand can be followed by the following options:
|
|
.Bl -tag -width ".Fl c Ar config"
|
|
.It Fl c Ar config
|
|
Specify alternative location of the configuration file.
|
|
The default location is
|
|
.Pa /etc/hast.conf .
|
|
.It Fl d
|
|
Print debugging information.
|
|
This option can be specified multiple times to raise the verbosity
|
|
level.
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width ".Pa /var/run/hastctl" -compact
|
|
.It Pa /etc/hast.conf
|
|
Configuration file for
|
|
.Nm
|
|
and
|
|
.Xr hastd 8 .
|
|
.It Pa /var/run/hastctl
|
|
Control socket used by
|
|
.Nm
|
|
to communicate with the
|
|
.Xr hastd 8
|
|
daemon.
|
|
.El
|
|
.Sh EXIT STATUS
|
|
Exit status is 0 on success, or one of the values described in
|
|
.Xr sysexits 3
|
|
on failure.
|
|
.Sh EXAMPLES
|
|
Initialize HAST provider, create file system on it and mount it.
|
|
.Bd -literal -offset indent
|
|
nodeB# hastctl create shared
|
|
nodeB# hastd
|
|
nodeB# hastctl role secondary shared
|
|
|
|
nodeA# hastctl create shared
|
|
nodeA# hastd
|
|
nodeA# hastctl role primary shared
|
|
nodeA# newfs -U /dev/hast/shared
|
|
nodeA# mount -o noatime /dev/hast/shared /shared
|
|
nodeA# application_start
|
|
.Ed
|
|
.Pp
|
|
Switch roles for the
|
|
.Nm shared
|
|
HAST resource.
|
|
.Bd -literal -offset indent
|
|
nodeA# application_stop
|
|
nodeA# umount -f /shared
|
|
nodeA# hastctl role secondary shared
|
|
|
|
nodeB# hastctl role primary shared
|
|
nodeB# fsck -t ufs /dev/hast/shared
|
|
nodeB# mount -o noatime /dev/hast/shared /shared
|
|
nodeB# application_start
|
|
.Ed
|
|
.Sh SEE ALSO
|
|
.Xr sysexits 3 ,
|
|
.Xr geom 4 ,
|
|
.Xr hast.conf 5 ,
|
|
.Xr fsck 8 ,
|
|
.Xr ggatec 8 ,
|
|
.Xr ggatel 8 ,
|
|
.Xr hastd 8 ,
|
|
.Xr mount 8 ,
|
|
.Xr newfs 8
|
|
.Sh AUTHORS
|
|
The
|
|
.Nm
|
|
was developed by
|
|
.An Pawel Jakub Dawidek Aq pjd@FreeBSD.org
|
|
under sponsorship of the FreeBSD Foundation.
|