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Commit Graph

736 Commits

Author SHA1 Message Date
Peter Rajnoha
cb82919b0d systemd: use {local,remote}-fs-pre.target instead of {local,remote}-fs.target
We want most of our units to be started before any local/remote mount
points are mounted - we used {local,remote}-fs.target for this purpose
before, but it was not 100% correct as there's even {local,remote}-fs-pre.target
special systemd unit reserved for this exact purpose.

See also man 7 systemd.special and "local-fs-pre.target"/"remote-fs-pre.target"
description.
2015-09-23 13:30:51 +02:00
David Teigland
532b2d2d4e man lvmthin: use --poolmetadatasize option
when extending a pool metadata lv, rather than
referencing the _tmeta device.
2015-09-22 13:44:09 -05:00
Peter Rajnoha
fd773dffb2 man: drop superfluous '--' in lvmconf man page for --enable/disable-halvm 2015-09-22 14:28:31 +02:00
Zdenek Kabelac
cfe869692f man: update man pages
Start to use 'italic' when the argument is not a fixed string.
Keep 'bold' when user cannot use any other string instead.
2015-09-22 00:08:44 +02:00
Zdenek Kabelac
330d584617 man: use PD/HP for compressed lines
Using .PD 0  to user zero spacing together with .HP is the best way
for condensed list of commands.
2015-09-18 17:45:46 +02:00
Zdenek Kabelac
11d6f81316 man: enhance dmsetup/dmstats
Document more supported options.
Cleanup man-style when documenting options.
Use .PD 0  and .HP
2015-09-18 17:45:46 +02:00
Alasdair G Kergon
548c09acfc man: Add all_man Makefile target.
Use 'make all_man' to generate all man pages (regardless of
configuration options) or 'make install_all_man' to install them.
2015-09-15 13:14:16 +01:00
David Teigland
8b8103efef man lvmlockd: move and update text about vgremove
The requirement to stop VGs before vgremove applies
to both sanlock and dlm VGs.
2015-09-11 14:34:22 -05:00
David Teigland
d323acdfec man lvmlockd: fix typo 2015-09-09 15:43:28 -05:00
David Teigland
81b0e9de7c man lvmlockd: mention device used for first vgcreate 2015-09-09 15:21:10 -05:00
Alasdair G Kergon
f5a3b05c7a pre-release 2015-09-05 23:46:22 +01:00
David Teigland
43d6b5b375 man lvmlockd: add section about first sanlock VG
Add a section specifically about creating the first
sanlock VG.
2015-09-04 13:01:03 -05:00
David Teigland
869c0bdeb8 man lvmlockctl: add man page 2015-09-04 11:05:13 -05:00
David Teigland
b00ee99a21 man lvmlockd: explain the use of lvmlockctl kill 2015-09-04 11:05:13 -05:00
Bryn M. Reeves
cebbb0feaf dmstats: replace histogram command with switch
Replace the histogram stats subcommand with a --histogram switch
to enable histogram related fields for both list and report output.

To avoid overloading the existing --histogram rename it to --bounds:
this is also a better description of the option.
2015-09-03 23:39:11 +01:00
Bryn M. Reeves
84d88cb2cf dmstats: add --notimesuffix switch
Add a switch to disable the printing of time unit suffixes in
histogram bounds descriptions.
2015-09-03 22:04:10 +01:00
Bryn M. Reeves
b86bd3b074 man: fix typo in dmstats.8.in 2015-09-02 23:01:46 +01:00
Bryn M. Reeves
3414601788 man: document --regionid in dmstats.8.in 2015-09-02 21:03:03 +01:00
Bryn M. Reeves
d31c4e0bc1 man: update dmstats.8.in examples
Make sure that correct 'dmstats create' messages are shown for all
examples and fix LV examples to use correct dmsetup output name
format (vg/lv -> vg-lv).
2015-09-02 21:03:03 +01:00
Bryn M. Reeves
031cd2bb0d dmstats: improve stats column names
Improve the names and labels of stats reports columns, ensure that
the minimum field widths allow unambiguos labels to be shown and
update the man page descriptions of these fields.
2015-09-02 21:03:03 +01:00
Bryn M. Reeves
3c0fc6f0da dmstats: add histogram support
Add support to dmstats to create and report histograms.

Add a --histogram switch to 'create' that accepts a string
description of bin boundaries and DR_STATS and DR_STATS_META fields
to report bin configuration and absolute and relative histogram
values:

  hist_bins
  hist_bounds
  hist_ranges
  hist_count
  hist_count_bounds
  hist_count_ranges
  hist_percent
  hist_percent_bounds
  hist_percent_ranges

A new 'histogram' subcommand displays a report that emphasizes
histogram data as either counters or percentage values.
2015-09-02 21:02:12 +01:00
Ondrej Kozina
ab5df4bc5c lvmpolld.8.in: add missing space 2015-09-02 17:24:34 +02:00
David Teigland
09b2649c5f man lvmlockd: various improvements 2015-08-28 11:38:26 -05:00
Alasdair G Kergon
cc17210bce man: Add install_full_man makefile target.
'make install_full_man' installs all the man pages regardless of
which components were enabled when 'configure' was run.
2015-08-28 13:03:18 +01:00
Zdenek Kabelac
1307fafe0f man: replace to with for
Better word.
2015-08-26 11:24:41 +02:00
Bryn M. Reeves
e4145ebc47 dmstats: add --precise switch to enable nanosecond counters. 2015-08-24 20:03:21 +01:00
Zdenek Kabelac
c868609cff man: fix sqm typo 2015-08-21 15:35:45 +02:00
Ferenc Wágner
8821cc416e cmirrord manual: add --foreground and --help options 2015-08-20 19:06:47 +02:00
Bryn M. Reeves
23770214a9 man: fix program_id string in dmstats.8.in 2015-08-20 17:27:28 +01:00
Bryn M. Reeves
bc39506792 man: update dmstats.8.in examples 2015-08-18 14:40:45 +01:00
Bryn M. Reeves
f3891e90e3 dmstats: make -v enable per area reports for 'stats list'
When dmstats is run with -v or higher enable a per-area reporting
mode for statistics regions. This will output one row per area
(rather than one row per region) and adds additional fields of use
when viewing areas:

 area_id    - index within the region assigned by libdm-stats
 area_start - the start location of the area in the containing
              device.
2015-08-14 22:03:37 +01:00
Bryn M. Reeves
9b3dc72506 dmstats: add 'interval' and 'interval_ns' report fields
Add a pair of fields to expose the current per-interval duation
estimate. The 'interval' field provides a real value in units of
seconds and the 'interval_ns' field provides the same quantity
expressed as a whole number of nanoseconds.
2015-08-14 13:36:50 +01:00
Bryn M. Reeves
6b81ac5807 dmstats: replace --force with new stats-specific --alldevices
The '--force' switch is only used by dmstats to allow either
creation or deletion of one or more regions on all devices.

These operations do not carry any risk: just a possible mess of
region IDs to be cleaned up.

Remove the use of '--force' for stats commands and change current
uses to a new '--alldevices' switch.
2015-08-13 19:05:46 +01:00
Zdenek Kabelac
6cde12a013 cache: man updates
Better man for cachepolicy and cachesettings.
2015-08-12 14:11:17 +02:00
Bryn M. Reeves
d62a8d2f15 dmstats: add libdm-stats library and 'dmsetup stats' command
Add the libdm-stats module to libdm: this implements a simple interface
for creating, managing and interrogating I/O statistics regions and
areas on device-mapper devices.

The library interface is documented in libdevmapper.h and provides a
'dm_stats' handle that is used to perform statistics operations and
obtain data.

Public methods are provided to create and destroy handles and to list,
create, and destroy statistics regions as well as to obtain and parse
counter data and calculate rate-based metrics.

This commit also adds a 'dmsetup stats' (aka 'dmstats') command with
'clear', 'create', 'delete', 'list', 'print', and 'report' sub-commands.

See the library documentation and the dmstats.8 manual page for detailed
API and command descriptions.
2015-08-09 14:37:58 +01:00
David Teigland
b59cdf0892 man: mention system ID in vgexport and vgimport 2015-08-07 16:35:07 -05:00
David Teigland
993fe07a3c man: add lockd bits to relevant commands 2015-08-07 16:25:00 -05:00
David Teigland
2bbf2fa8eb man lvmlockd: update 2015-08-07 15:18:44 -05:00
David Teigland
1c013e7ae2 man lvmcache: mention LVs must be in the same VG 2015-08-06 10:06:21 -05:00
Peter Rajnoha
ce1528359a man: document --nameprefixes 2015-08-04 14:03:50 +02:00
Bryn M. Reeves
a161e29c59 dmsetup: Add --count and --interval to reports.
For example, to monitor active devices every second you can now run
dmsetup info -c --count 0.
2015-07-31 21:59:34 +01:00
David Teigland
d41bab4028 man lvmlockd: update method for changing lock type
The old description did not work.
2015-07-13 16:33:58 -05:00
David Teigland
222bb2b88d lockd: note that external origins don't work in lockd VGs
in a comment at the point where it fails, and in the
lvmlockd man page.
2015-07-10 15:53:21 -05:00
David Teigland
b8538f5dcd vgchange: allow changing to lockd type when mirrors exist
and update lvmlockd man page to reflect the fact that
mirror LVs work correctly in lockd VGs.
2015-07-10 15:53:21 -05:00
Andy Grover
d77546773b man: add lvmlocal.conf to config cascade
see BZ 1241182, lvmlocal is searched before lvm.conf but after
lvm_<tag>.conf.
2015-07-08 10:02:28 -07:00
David Teigland
6a8cc1dcd4 man lvmlockd: minor updates 2015-07-06 15:32:41 -05:00
David Teigland
114744cee1 config: rename lock_retries lvmlockd_lock_retries
Because it only applies to lvmlockd requests, but
sounded too general.
2015-07-06 11:44:28 -05:00
David Teigland
fe70b03de2 Add lvmlockd 2015-07-02 15:42:26 -05:00
Peter Rajnoha
07a34184db lvmconfig: display comment about value from existing config being used
Display comment abour value from existing config being used. For example:

$ lvmconfig --type full --withsummary report/compact_output report/buffered

 # Configuration option report/compact_output.
 # Do not print empty report fields.
 # Value defined in existing configuration has been used for this setting.
 compact_output=1

 # Configuration option report/buffered.
 # Buffer report output.
 buffered=1
2015-06-25 13:51:54 +02:00
Peter Rajnoha
c794c163b5 lvmconfig: add --type full to display full tree of settings
The lvmconfig --type full is actually a combination of --type current
and --type missing together with --mergedconfig options used.

The overall outcome is a configuration tree with settings as LVM sees
it when it looks for the values - that means, if the setting is defined
in some config source (lvm.conf, --config, lvmlocal.conf or any profile
that is used), the setting is used. Otherwise, if the setting is not
defined in any part of the config cascade, the defaults are used.

The --type full displays exactly this final tree with all the values
defined, either coming from configuration tree or from defaults.
2015-06-25 13:33:52 +02:00
Alasdair G Kergon
110a0745cd man: Add missing env vars to lvm man page. 2015-06-24 20:43:35 +01:00
Peter Rajnoha
a4724350e4 lvmconfig: add --withspaces option
We shouldn't be adding spaces by default in output as that
may be be used already in scripts and especially for the eval
in shell scripts where spaces are not allowed between key
and value!

Add --withspaces option to lvmconfig for pretty output with
more space in for readability.
2015-06-24 13:19:23 +02:00
David Teigland
3d9957e3dd man vgchange lvchange: mention activation option s
and improve the existing text about existing
activation options.
2015-06-16 13:28:07 -05:00
David Teigland
857296c823 man lvm: mention hyphens in option names 2015-06-16 10:33:01 -05:00
David Teigland
ce18fb61c0 lvmcache: mention lvconvert --cachemode
for changing the cache mode on an existing LV.
2015-06-15 14:30:58 -05:00
David Teigland
3225f8d175 man: lvmthin chunk and metadata sizes
Clear some stale information, and give a suggestion to use
a metadata size of 1GiB.
2015-05-27 15:53:01 -05:00
Ondrej Kozina
77fa958c1e lvmpolld.8.in: man page rewrite
- add client functionality
- fill in long option variants
2015-05-15 20:33:47 +02:00
Ondrej Kozina
bf19bbbd55 lvm.8.in: add reference to lvpoll built-in command 2015-05-15 20:32:39 +02:00
Ondrej Kozina
4f1c1f3d6b lvmdump.8.in: describe lvmpolld related option 2015-05-15 20:32:32 +02:00
Ondrej Kozina
ce3c457dcc lvm-lvpoll.8.in: man page for built-in command 2015-05-15 20:32:16 +02:00
Ondrej Kozina
239fb95fde lvmpolld.8.in: hide origin of lvmpolld man page
:)
2015-05-15 20:32:08 +02:00
Zdenek Kabelac
03aec36fc0 man: missed y|n for wipesignatures 2015-05-15 17:44:52 +02:00
Ondrej Kozina
e213aa17bd lvmpolld.8.in: clarify the timeout parameter
Remove references to systemd native service. Now
the libdaemon supports shutdown on idle no matter
the init process implementation installed.
2015-05-12 17:16:31 +02:00
Ondrej Kozina
e587b0677b lvmpolld: Add standalone polldaemon.
See doc/lvmpolld_overview.txt
2015-05-09 00:59:18 +01:00
Alasdair G Kergon
87578b5d94 man: Fix recursive lvm-config man page. 2015-05-07 12:07:40 +01:00
David Teigland
6a171bbdf5 man: expanded explanation of lvmetad 2015-05-01 15:23:43 -05:00
David Teigland
9273b1a964 man: expanded explanation of pvscan
Related to it's role with lvmetad and auto-activation.
2015-05-01 15:23:32 -05:00
Peter Rajnoha
8f25606d3a man: lvmconfig: also mention '--type list' in synopsis 2015-04-30 18:00:39 +02:00
Peter Rajnoha
fc65269d68 lvmconfig: add supporting code for handling deprecated settings
This patch adds supporting code for handling deprecated settings.

Deprecated settings are not displayed by default in lvmconfig output
(except for --type current and --type diff). There's a new
"--showdeprecated" lvmconfig option to display them if needed.

Also, when using lvmconfig --withcomments, the comments with info
about deprecation are displayed for deprecated settings and with
lvmconfig --withversions, the version in which the setting was
deprecated is displayed in addition to the version of introduction.

If using --atversion with a version that is lower than the one
in which the setting was deprecated, the setting is then considered
as not deprecated (simply because at that version it was not
deprecated).

For example:

$ lvmconfig --type default activation
activation {
        ...
	raid_region_size=512
        ...
}

$ lvmconfig --type default activation --showdeprecated
activation {
        ...
	mirror_region_size=512
	raid_region_size=512
        ...
}

$ lvmconfig --type default activation --showdeprecated --withversions
activation {
        ...
	# Available since version 1.0.0.
	# Deprecated since version 2.2.99.
	mirror_region_size=512
	# Available since version 2.2.99.
	raid_region_size=512
        ...
}

$ lvmconfig --type default activation --showdeprecated --withcomments
activation {
        ...
	# Configuration option activation/mirror_region_size.
	# This has been replaced by the activation/raid_region_size
	# setting.
	# Size (in KB) of each copy operation when mirroring.
	# This configuration option is deprecated.
	mirror_region_size=512

	# Configuration option activation/raid_region_size.
	# Size in KiB of each raid or mirror synchronization region.
	# For raid or mirror segment types, this is the amount of
	# data that is copied at once when initializing, or moved
	# at once by pvmove.
	raid_region_size=512
        ...
}

$ lvmconfig --type default activation --withcomments --atversion 2.2.98
activation {
       ...
       # Configuration option activation/mirror_region_size.
       # Size (in KB) of each copy operation when mirroring.
       mirror_region_size=512
       ...
}
2015-04-30 17:55:04 +02:00
Petr Rockai
d6b6246864 man: Fix references to lvmcache(7) that mentioned section 8 by mistake. 2015-04-30 06:35:05 +02:00
David Teigland
299a3be0d3 man: lvmthin section about use-policies 2015-04-29 16:27:40 -05:00
David Teigland
bf73ccb848 man: 'lvmconfig' is preferred over 'lvm config' 2015-04-29 10:14:23 -05:00
David Teigland
f0ff3e9982 man: 'lvm config' is preferred over 'lvm lvmconfig' 2015-04-29 10:04:28 -05:00
Peter Rajnoha
79ec8eb93c cleanup: lvmconfig man page typo 2015-04-29 16:35:49 +02:00
Peter Rajnoha
8b6b90b073 config: consolidate CFG_UNSUPPORTED and CFG_ADVANCED settings
These settings are in the "unsupported" group:

devices/loopfiles
log/activate_file
metadata/disk_areas (section)
metadata/disk_areas/<disk_area> (section)
metadata/disk_areas/<disk_area>/size
metadata/disk_areas/<disk_area>/id

These settings are in the "advanced" group:

devices/dir
devices/scan
devices/types
global/proc
activation/missing_stripe_filler
activation/mlock_filter
metadata/pvmetadatacopies
metadata/pvmetadataignore
metadata/stripesize
metadata/dirs

Also, this patch causes the --ignoreunsupported and --ignoreadvanced
switches to be honoured for all config types (lvmconfig --type).

By default, the --type current and --type diff display unsupported
settings, the other types ignore them - this patch also introduces
--showunsupported switch for all these other types to display even
unsupported settings in their output if needed.
2015-04-29 16:31:47 +02:00
Peter Rajnoha
3be3eb2995 lvmconfig: add --type list and -l|--list
lvmconfig --type list displays plain list of configuration settings.
Some of the existing decorations can be used (--withsummary and
--withversions) as well as existing options/switches (--ignoreadvanced,
--ignoreunsupported, --ignorelocal, --atversion).

For example (displaying only "config" section so the list is not long):

$lvmconfig --type list config
config/checks
config/abort_on_errors
config/profile_dir

$ lvmconfig --type list --withsummary config
config/checks - If enabled, any LVM configuration mismatch is reported.
config/abort_on_errors - Abort the LVM process if a configuration mismatch is found.
config/profile_dir - Directory where LVM looks for configuration profiles.

$ lvmconfig -l config
config/checks - If enabled, any LVM configuration mismatch is reported.
config/abort_on_errors - Abort the LVM process if a configuration mismatch is found.
config/profile_dir - Directory where LVM looks for configuration profiles.

$ lvmconfig --type list --withsummary --withversions config
config/checks - If enabled, any LVM configuration mismatch is reported. [2.2.99]
config/abort_on_errors - Abort the LVM process if a configuration mismatch is found. [2.2.99]
config/profile_dir - Directory where LVM looks for configuration profiles. [2.2.99]

Example with --atversion (displaying global section):

$ lvmconfig --type list global
global/umask
global/test
global/units
global/si_unit_consistency
global/suffix
global/activation
global/fallback_to_lvm1
global/format
global/format_libraries
global/segment_libraries
global/proc
global/etc
global/locking_type
global/wait_for_locks
global/fallback_to_clustered_locking
global/fallback_to_local_locking
global/locking_dir
global/prioritise_write_locks
global/library_dir
global/locking_library
global/abort_on_internal_errors
global/detect_internal_vg_cache_corruption
global/metadata_read_only
global/mirror_segtype_default
global/raid10_segtype_default
global/sparse_segtype_default
global/lvdisplay_shows_full_device_path
global/use_lvmetad
global/thin_check_executable
global/thin_dump_executable
global/thin_repair_executable
global/thin_check_options
global/thin_repair_options
global/thin_disabled_features
global/cache_check_executable
global/cache_dump_executable
global/cache_repair_executable
global/cache_check_options
global/cache_repair_options
global/system_id_source
global/system_id_file

$ lvmconfig --type list global --atversion 2.2.50
global/umask
global/test
global/units
global/suffix
global/activation
global/fallback_to_lvm1
global/format
global/format_libraries
global/segment_libraries
global/proc
global/locking_type
global/wait_for_locks
global/fallback_to_clustered_locking
global/fallback_to_local_locking
global/locking_dir
global/library_dir
global/locking_library
2015-04-29 11:58:14 +02:00
Peter Rajnoha
0ba332e82a refactor: dumpconfig: keep --withcomments to display full comment and use --withsummary for one line summary 2015-04-29 11:14:18 +02:00
Alasdair G Kergon
3f0434057b config: Introduce lvmconfig.
'lvm dumpconfig' now does a lot more than just dumping configuration
information and is no longer only a support tool.  Users now need
to run it to find out about configuration information that has been
removed from the lvm.conf man page so we need to promote this to full
command line status as 'lvmconfig'.  Also accept 'lvm config' and mention
it in the usage information of lvmconf (which should also get merged in
eventually).
2015-04-28 17:00:37 +01:00
Petr Rockai
92607ecfe6 man: Escape single quotes in an example to avoid groff's unicode conversion. 2015-04-22 17:31:11 +02:00
David Teigland
47ed4cdc35 config: remove duplication of settings
The specific config settings have been removed
from the lvm.conf(5) man page, and replaced with
a description of how to use lvm dumpconfig to
view the settings.

The sample lvm.conf and lvmlocal.conf files are now generated:

example.conf.base  - initial ungenerated part of the file
example.conf.gen   - generated portion from dumpconfig
example.conf.in    - combination of .base and .gen files
example.conf       - result of configure processing .in file

lvmlocal.conf.base - initial ungenerated part of the file
lvmlocal.conf.gen  - generated portion from dumpconfig
lvmlocal.conf.in   - combination of .base and .gen files
lvmlocal.conf      - result of configure processing .in file

Do not edit the .in files, but edit config_settings.h
or the .base files, and then use 'make generate' to create
the new .in files.

- configure
  with options

- make
  creates tools/lvm

- make generate
  uses tools/lvm to create example.conf.in and lvmlocal.conf.in
  by combining .base files with dumpconfig output.

- configure
  with same options as above
  creates example.conf and lvmlocal.conf from .in files
2015-04-21 14:55:03 -05:00
David Teigland
9b86e8e8f4 dumpconfig: add --ignorelocal
When generating a sample lvm.conf file, we don't want to
include the "local" section, which is kept in lvmlocal.conf.
2015-04-21 14:55:03 -05:00
David Teigland
5f6ac1c812 dumpconfig: add --withfullcomments option
--withfullcomments prints all comment lines for each config option.
--withcomments prints only the first comment line, which should be
a short one-line summary of the option.
2015-04-15 10:56:42 -05:00
Peter Rajnoha
22defdac64 man: fix some formatting and also mention -vv 2015-04-15 09:19:11 +02:00
Peter Rajnoha
375ed98ae9 make: move blkdeactivate script and blkdeactivate.8 man page installation from install_lvm2 to install_device-mapper target
This completes commit 7a4e27eee5.
2015-04-14 15:24:37 +02:00
Peter Rajnoha
d5651f44e3 man: lvmconf: more notes on --services option 2015-04-14 09:49:56 +02:00
Peter Rajnoha
f814d763c6 lvmconf: add --enable-halvm, --disable-halvm, --services, --mirrorservice, --startstopservices options and use proper global/use_lvmetad default value
This patch adds new options to lvmconf:

  --enable-halvm (just like --enable-cluster, but configure LVM
                  for use in HA LVM - meaning disabling lvmetad and
                  making sure we have locking_type=1)

  --disable-halvm (just like --disable-cluster, but configure LVM
                   back from HA LVM - meaning enabling lvmetad if
                   it's enabled by default and making sure we have
                   default locking type set)

  --services (causes clvmd and lvmetad services to be enabled or
              disabled appropriately and conforming to the changes
              in lvm configuration we've just made with lvmconf)

  --mirrorservice (in addition to clvmd and lvmetad services, also
                   enable or disable cmirrord service appropriately;
                   this is a separate option because cmirrord is
                   optional and it doesn't need to be always enabled
                   when clvmd is enabled)

  --startstopservices (in addition to enabling or disabling services,
                       start and stop these services immediately)

These options are supposed to help users to make their system ready
for cluster with clvmd (active-active) or HA LVM (active-passive) use
while lvmconf script can handle services as well so users don't need
to bother about setting them manually.

Also, before this patch, we hardcoded global/use_lvmetad=0 as default
value in lvmconf script. Howeverm this default may change by just
flipping the value in config_settings.h and we may forget to edit
the lvmconf. It's better to use lvm dumpconfig --type default global/use_lvmetad
to get the actual default value and use this one instead of hardcoded one.
2015-04-13 15:27:17 +02:00
Peter Rajnoha
f32973c78e select: mention { } use in lvm.8 man page and '-S help' properly 2015-04-08 11:14:16 +02:00
Zdenek Kabelac
a10a11bd54 lvchange: disable persistent minors for pools
There is no reason to support persistent major/minor numbers
for pool volumes - it's only meant to be supported for filesystems
(since i.e. nfs may need to keep volume on a persistent device node.)

Support for pools is now explicitely disabled and documented.
2015-03-18 13:42:13 +01:00
David Teigland
b48ff3b94e man: add info to lvmsystemid
about losing access to a VG if lvm is downgraded
to an earlier version.
2015-03-05 12:12:42 -06:00
David Teigland
1e65fdd9ba system_id: make new VGs read-only for old lvm versions
Previous versions of lvm will not obey the restrictions
imposed by the new system_id, and would allow such a VG
to be written.  So, a VG with a new system_id is further
changed to force previous lvm versions to treat it as
read-only.  This is done by removing the WRITE flag from
the metadata status line of these VGs, and putting a new
WRITE_LOCKED flag in the flags line of the metadata.

Versions of lvm that recognize WRITE_LOCKED, also obey the
new system_id.  For these lvm versions, WRITE_LOCKED is
identical to WRITE, and the rules associated with matching
system_id's are imposed.

A new VG lock_type field is also added that causes the same
WRITE/WRITE_LOCKED transformation when set.  A previous
version of lvm will also see a VG with lock_type as read-only.

Versions of lvm that recognize WRITE_LOCKED, must also obey
the lock_type setting.  Until the lock_type feature is added,
lvm will fail to read any VG with lock_type set and report an
error about an unsupported lock_type.  Once the lock_type
feature is added, lvm will allow VGs with lock_type to be
used according to the rules imposed by the lock_type.

When both system_id and lock_type settings are removed, a VG
is written with the old WRITE status flag, and without the
new WRITE_LOCKED flag.  This allows old versions of lvm to
use the VG as before.
2015-03-05 09:50:43 -06:00
David Teigland
c32efc7f7e system_id: apply consistent naming
In log messages refer to it as system ID (not System ID).

Do not put quotes around the system_id string when printing.

On the command line use systemid.

In code, metadata, and config files use system_id.

In lvmsystemid refer to the concept/entity as system_id.
2015-02-27 13:32:00 -06:00
David Teigland
71d97fd88a man: lvmsystemid: empty string equals no system_id 2015-02-25 16:55:56 -06:00
David Teigland
2c50cbe8cb tests: fix the system_id tests
That were broken by yesterday's system_id changes.
2015-02-25 14:58:49 -06:00
Petr Rockai
a88430c6a1 lvcreate.8: Mention --cachepolicy and --cachesettings. 2015-02-25 18:34:01 +01:00
Petr Rockai
0d313282f2 lvmcache.7: add a section on --cachepolicy/--cachesettings 2015-02-25 18:21:30 +01:00
Alasdair G Kergon
2fc2928978 config: Rename allow_system_id to extra_system_ids.
Add warnings to the config file templates and briefly document
each value.
Configure lvmlocal.conf and install in /etc/lvm.
2015-02-23 22:19:08 +00:00
Alasdair G Kergon
36a6c0df46 systemid: Add built-in systemid command.
Make it easy to find the system ID when testing.
Also show in general debug output.
2015-02-23 17:26:50 +00:00
David Teigland
42ba7974c5 man lvmsystemid: update changing the system_id 2015-02-20 16:55:27 -06:00
David Teigland
cfd1b8eae2 man lvm: document --foreign option 2015-02-20 16:26:04 -06:00
David Teigland
3361e662f4 man: systemid option for vgcreate and vgchange 2015-02-20 14:58:01 -06:00