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If lvmlockd in cluster is killed accidently or any other reason, the
lock resources will become orphaned in the VG lockspace. When the
cluster manager tries to restart this daemon, the LVs will probably
become inactive because of resource schedule policy and thus the lock
resouce will be omited during the adoption process. This patch will
try to purge the lock resources left in previous lockspace, so the
following actions can work again.
Exclude the new fs resizing capabilities at build time
(rather than run time) if the necessary libblkid features
are not available. When excluded, all fs resizing options
are translated to resize_fsadm. Accessing the new
features now requires rebuilding lvm if libblkid is
upgraded.
Place the addCleanup at the end as we don't want to go through clean up
if we don't make it through setUp. If we don't do this we can remove VGs
that we didn't create in the unit test.
Previously when the __del__ method ran on LVMShellProxy we would blindly
call terminate(). This was a race condition as the underlying process
may/maynot be present. When the process is still present the SIGTERM will
end up being seen by lvmdbusd too. Re-work the code so that we
first try to wait for the child process to exit and only then if it hasn't
exited will we send it a SIGTERM. We also ensure that when this is
executed we will briefly ignore a SIGTERM that arrives for the daemon.
If we plan to use dm throttling for mirror targets - we actually
have to check whether kernel runs with CONFIG_HZ_1000 - if it does
not the whole idea of throttling is actually not working in the
testsuite as within a single 'tick' with HZ 100 way too much date
is being moved on any modern hardware - and since there is no plan
to change this in kernel - we simply avoid using throttling on such
kernel and test needs to work differently - either ignore results
or use much larger mirror sizes...
When checking to see if the PV is missing we incorrectly checked that the
path_create was equal to PV creation. However, there are cases where we
are doing a lookup where the path_create == None. In this case, we would
fail to set lvm_id == None which caused a problem as we had more than 1
PV that was missing. When this occurred, the second lookup matched the
first missing PV that was added to the object manager. This resulted in
the following:
Traceback (most recent call last):
File "/usr/lib/python3.9/site-packages/lvmdbusd/utils.py", line 667, in _run
self.rc = self.f(*self.args)
File "/usr/lib/python3.9/site-packages/lvmdbusd/fetch.py", line 25, in _main_thread_load
(changes, remove) = load_pvs(
File "/usr/lib/python3.9/site-packages/lvmdbusd/pv.py", line 46, in load_pvs
return common(
File "/usr/lib/python3.9/site-packages/lvmdbusd/loader.py", line 55, in common
del existing_paths[dbus_object.dbus_object_path()]
Because we expect to find the object in existing_paths if we found it in
the lookup.
resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2085078
Latest upstream build of lvm results in the following error when
trying to use lvmshell.
"Argument --reportformat cannot be used in interactive mode.,
Error during parsing of command line."
When lvm is compiled with editline, if the file descriptors don't look like
a tty, then no "lvm> " prompt is done. Having lvm output the shell prompt
when consuming JSON on a report file descriptor is very useful in
determining if lvm command is complete.
Historically we have seen a few different errors which occur when we call
fullreport. Failing exit code and JSON which is missing one or more keys.
Instruct lvm to dump the debug to a file during fullreport calls when we
fork & exec lvm. If we encounter an error, ouput the debug data.
The reason this isn't being done when lvmshell is used is because we
don't have an easy way to test the error paths.
This change is complicated by the following:
1. We don't know if fullreport was good until we evaluate all the JSON.
This is done a bit after we have called into lvm and returned.
2. We don't want to orphan the debug file used by lvm if the daemon is
killed. Thus we try to minimize the window where the debug file hasn't
already been unlinked. A RFE to pass an open FD to lvm for this
purpose is outstanding.
The temp. file is:
-rw------. 1 root root /tmp/lvmdbusd.lvm.debug.XXXXXXXX.log
Introduce an exception which is used for known existing issues with lvm.
This is used to distinguish between errors between lvm itself and lvmdbusd.
In the case of lvm bugs, when we simply retry the operation we will log
very little. Otherwise, we will dump a full traceback for investigation
when we do the retry.
Instead of lumping all the exceptions, break them out to handle the dbus
exceptions separately, to reduce the amount of debug information that ends
up in the journal that has questionable value.
