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At this moment LVM_LOG_FILE_EPOCH with
LVM_EXPECTED_EXIT_STATUS properly deletes debug logs
only for real commands - support for lvm2 API does not yet
exists
By default these are empty strings, so the config settings
should be flagged as undefined, so they will be commented
out of the generated config. Otherwise, the lines:
thin_repair_options=""
cache_repair_options=""
in the dump output cause a warning when processed since
lvm doesn't want an empty string.
Also regenerate lvm.conf.in.
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
With use_lvmetad=0, duplicate PVs /dev/loop0 and /dev/loop1,
where in this example, /dev/loop1 is the cached device
referenced by pv->dev, the command 'pvs /dev/loop0' reports:
Failed to find physical volume "/dev/loop0".
This is because the duplicate PV detection by pvid is
not working because _get_all_devices() is not setting
any dev->pvid for any entries. This is because the
pvid information has not yet been saved in lvmcache.
This is fixed by calling _get_vgnameids_on_system()
before _get_all_devices(), which has the effect of
caching the necessary pvid information.
With this fix, running pvs /dev/loop0, or pvs /dev/loop1,
produces no error and one line of output for the PV (the
device printed is the one cached in pv->dev, in this
example /dev/loop1.)
Running 'pvs /dev/loop0 /dev/loop1' produces no error
and two lines of output, with each device displayed
on one of the lines.
Running 'pvs -a' shows two PVs, one with loop0 and one
with loop1, and both shown as a member of the same VG.
Running 'pvs' shows only one of the duplicate PVs,
and that shows the device cached in pv->dev (loop1).
The above output is what the duplicate handling code
was previously designed to output in commits:
b64da4d8b5 toollib: search for duplicate PVs only when needed
3a7c47af0e toollib: pvs -a should display VG name for each duplicate PV
57d74a45a0 toollib: override the PV device with duplicates
c1f246fedf toollib: handle duplicate pvs in process_in_pv
As a further step after this, we may choose to change
some of those.
For all of these commands, a warning is printed about
the existence of the duplicate PVs:
Found duplicate PV ...: using /dev/loop1 not /dev/loop0
Rename envvar LVM_LOG_FILE_UNLINK_STATUS to LVM_EXPECTED_EXIT_STATUS
and change compare sign from '!' to '>'.
Validate LVM_LOG_FILE_EPOCH and support strictly only
up-to 32 alpha chars. If the content doesn't pass
epoch is simply ignored.
Enhance 'not' to manage autodeletion of log files in right cases.
Use separately marked epoch log files for clvmd and dmeventd.
Properly manage stack tracing for new debug.log names.
Add support for 2 new envvars for internal lvm2 test suite
(though it could be possible usable for other cases)
LVM_LOG_FILE_EPOCH
Whether to add 'epoch' extension that consist from
the envvar 'string' + pid + starttime in kernel units
obtained from /proc/self/stat.
LVM_LOG_FILE_UNLINK_STATUS
Whether to unlink the log depending on return status value,
so if the command is successful the log is automatically
deleted.
API is still for now experimental to catch various issue.
add info for various commits, most significant were:
- toollib: close connection to lvmetad after fork
(fe30658a4d)
- toollib: do not spawn polling in lv_change_activate
(c26d81d6e6)
- pvmove: split pvmove_update_metadata function
(65623b63a2)
- lvconvert: move poll code in before refactoring
(5190f56605)
- pvmove: move poll code in before refactoring
(a098aa419f)
--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.
Previous commit has made have_cache & have_thin producing
false return value.
Fix it and at the some time provide much better reconfiguring
warning message.
If the test machine is missing needed and configured binaries
it will produce TEST WARNING result.
When a var like LVM_TEST_THIN_CHECK_CMD is set to ""
(which is valid) we need to correctly use '-'.
Otherwise ':-' replaces such value with built-in default.
There are two reasons for this: first, this allows the client side to notice
that some PV has multiple devices associated with it and print appropriate
warnings. Second, if a duplicate device pops up and disappears, after this
change the original connection between the PV and device is not lost.
This removes dependency on lvm binary - if it's not present, all LVM
processing is skipped (shouldn't normally happen because if lvm binary
is missing then there's obviously nothing that would activate it, but
let's make sure).
Without this tight dependency on lvm, the blkdeactivate script can
be packaged with libdevmapper/dmsetup (in contrast to lvm as it was
before) and as such the script can still be used to handle other DM
devices.
Put in pvmove background process into list quickly.
Update API for aux add_to_kill_list()/kill_listed_processes().
Run on 'background' (&) only non-background pvmoves.
If the system is correctly configure (cache & thin tools are present)
avoid 'extra' rebuild of configuration.
On the other hand - if some tool is missing - duplicate ##LVMCONF should
make it more straighforward to see.
