* Multipath device names only start with the mpath-prefix if the option
use_userfriendly_names is set true in /etc/multipath.conf and if user
has not set any aliases in the said file. Thus the for-loop should go
through all files in /dev/mapper/, not just ones starting with 'mpath'
* Bash is perfectly capable to extend `/dev/mapper/*` notation without a
need to pass it to an external ls
* Changed the function to use a local variable $_dev instead of the
global $dev, which seemed to be the original intention as the local
_dev was defined but not used
By default, dracut only builds in dm-service-time into the initramfs as
that is the default multipath.conf path selector. If the user changes
the path selector to "round robin" on the fly and runs dracut, multipath
does not find any paths on boot and the user will be dropped into a
shell.
Apparently, in RHEL7 dracut defaults to "hostonly" mode, i.e. modules
not currently in use at the time dracut runs do not get built into
initramfs. This is definitely one case where this doesn't work. A change
to reconfigure multipath probably should not render the system
unbootable.
https://bugzilla.redhat.com/show_bug.cgi?id=1195392
(cherry picked from commit f11d7a81e2)
For large machine, suppose there's a lot of multipath devices, multipath layer
will use a lot of memory. For kdump kernel memory is very limited thus it causes
oom. To avoid oom, we only add necessary multipath devices in kdump kernel
multipath.conf.
This is done by use mpathconf --allow, a new option which is like whitelist.
Signed-off-by: Dave Young <dyoung@redhat.com>
The multipath and kpartx rules have different numbers in SUSE.
The 11-dm-mpath.rules file had been missing, causing
blacklisting to not work properly.
References: bnc#873151, bnc#872662, bnc#883149
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>
The multipathd package might install a service and a socket
file. Using the original service file from the installed
system without the socket file triggers a bug in systemd,
causing systemd to crash.
As we don't actually need to socket file in the initrd we
should be installing our own service file which does not
reference the socket file at all.
References: bnc#871610
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>
The device handler modules need to be loaded early during boot
to avoid I/O errors being printed to the system log.
References: bnc#871617
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>
multipathd is using pthreads, which require libgcc_s for
pthread_cancel to work. Without it multipathd might crash
with SIGABRT.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Add new functions require_binaries() and require_any_binary() to be used
in the check() section of module-setup.sh.
These functions print a warning line telling the user, which binary is
missing for the specific dracut module.
This unifies the way of checking for binaries and makes the life of an
initramfs creator easier, if he wants to find out why a specific dracut
module is not included in the initramfs.
For lvm, multipath, iscsi modules they do not care about the filesystem,
Also there could be devcie in host_devs but it does not get formated.
For these kind of modules, use for_each_host_dev_and_slaves will be better than use
for_each_host_dev_fs, here add a new function to iterate the host_devs and
their slave devices.
In original for_each_host_dev_fs, it will call check_block_and_slaves which
will return once helper function return 0, but this is not enough for kdump
iscsi setup. For kdump iscsi case, it need setup each slave devices so that
the iscsi target can be properly setuped in initramfs.
Thus, this patch also add new functions check_block_and_slaves_all and
for_each_host_dev_and_slaves_all.
Signed-off-by: Dave Young <dyoung@redhat.com>
Tested-by: WANG Chao <chaowang@redhat.com>
A multipath partition's uuid will be presented like:
# cat /sys/dev/block/$_dev/dm/uuid
part1-mpath-360060e801047103004f2c4b300000008
So in this case, change the match regexp from '^mpath-' to 'mpath-'.
Signed-off-by: Chao Wang <chaowang@redhat.com>
Another solution could be searching in directories found at
/etc/ld.so.conf.d/*.conf or adding a new parameter. Here is a patch
which adds a new --libdirs parameter, and also a new inst_libdir_file
function which will try to expand metacharacters on each lib
directory:
inst_libdir_file "libdevmapper-event-lvm*.so"
Use bash "[[ string =~ pattern ]]" instead of "egrep -q".
Replace control-dominated serial fondling
for var in $(proc1); do proc2 var; done
with data-dominated parallel pipeline
proc1 | while read var; do proc2 var; done
Together this is a large savings.
[harald@redhat.com: fixed network kernel module filter]
Harald Hoyer