We need fs dump target being mounted firstly before creating mkdumprd
This is because we want to get the mount options from kernel mountinfo
instead of simply mount it without considering mount options.
To avoid the filesystem being used by something other than kdump we
suggest them to mount it as 'ro', mkdumprd will remount it as 'rw' when
necessary and remount it back to 'ro'
In 2nd kernel kdump will still use 'rw' to mount it though.
Tested local read-only mounted fs dump.
[v1->v2]: improve documentation
add error handling for `mount -o remount,ro`
Fixed the changelog per Vivek's comment
The code was reviewed by Vivek.
Signed-off-by: Dave Young <dyoung@redhat.com>
Resolves: bug 868990
ssh will send local stdin input to remote side, this cause trouble
when we call ssh in the loop of parsing kdump.conf.
Ie. if we specify both 'ssh' and 'core_collector' option in kdump.conf,
and put 'core_collector' behind 'ssh', there will be no chance to
handle 'core_collector' because in get_ssh_size() ssh eat all the later
input of the while loop.
Fix this by use /dev/null as stdin in get_ssh_size().
Tested in fedora kvm guest.
Signed-off-by: Dave Young <dyoung@redhat.com>
Suggested-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For devices with filesystem, udev /dev/disk/by-uuid/* links are usually
reliable. But one exception is multipath devices, child and top layer
device may have same uuid.
As dm devices maintain /dev/mapper/* as persistent names, so converting to
/dev/mapper/* firstly then try by-uuid/* and by-id/*
Also because user know better what's the persistent name we just document well
to suggest user use persistent name in kdump.conf. it's suggested to
to use lvm or multipath canonical names or uuid/label.
Updated kdump.conf examples and related chunks in kexec-kdump-howto.txt
use lvm /dev/vg/<devname> in examples
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For raw device dump, also pass persistent name to dracut --device to fix
the device renaming problem.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
currently --mount param are retrieved from /proc/mounts, but the device
name could be renamed in initramfs. So here convert them to persistent
names before passing to dracut
lvm canonical dev name is /dev/mapper/lvname-link which will be showed
in /proc/mounts
here fix get_mp function by using findmnt utils to find the mount point.
This patch depends on below dracut patch:
http://permalink.gmane.org/gmane.linux.kernel.initramfs/2903
[chaowang]:
in case device is not mounted we should not echo the mount line in to_mount()
use findmnt -n to strip the header line
for nfs don't pass persistent name to dracut
[vivek]:
improve variable names
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Copy the function get_persistent_dev from dracut for us to handle the
persistent name issues.
[vivek] add error handling for get_persistent_dev
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For raw device upon complex storage such as multipath and iscsi
dracut does not resolve the module dependency automaticlly,
I sent a patch for the device pass via dracut argument "--device"
see below for reference:
http://permalink.gmane.org/gmane.linux.kernel.initramfs/2836
Add --device <device> in mkdumprd for raw dump to fix this issue.
Testing:
raw dump on iscsi targets.
Signed-off-by: Dave Young <dyoung@redhat.com>
Tested-by: Chao Wang <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently net options means either nfs or ssh dump.
Better to split these two into standalone options. That's more clear to user.
after the split, ssh dump need user specify "ssh user@host"
nfs dump need user specify "nfs host:nfsshare"
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For "-c /dev/null" Harald mentioned that it is useless.
In fact, dracut code [[ -f /dev/null ]] will return false thus it will still use
the default config file
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Cong Wang <amwang@redhat.com>
kernel-modules and kdumpbase will be included automaticlly when check() pass.
So no need explictly specify them in dracut cmdline.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
file install code should stay in module-setup.sh, move core_collector installation
code as well.
Note: mkdumpfile is installed twice before, one is dracut cmdline, another is
module_setup.sh. This patch removed the duplicate code in dracut cmdline.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
moving file install code to module-setup.sh looks better.
This patch move extra_bins installation to module-setup.sh
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For core_collector like makedumpfile use case, it will compress and filter the
vmcore so free space small than memtotal is mostly ok. But we can not guarantee
it will be always ok.
The "there is not enough space" is not accurate, improve it to "there might be
not enough space"
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz821997
dracut will mount rootfs for us, so we need not pass root to fstab again here.
Here remove the root-mount line.
This will depends on the root=cmdline is right, by default kdump will
inherit it from /proc/cmdline.
Vivek: add document about the assumption for the root= cmdline issue.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
fstab-sys module will be added automaticlly when there's --mount passed
So no need to explictly add it in dracut cmdline
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
dash is be default omited in f17, but we use -o in command line so our omit
modules list will overwrite the system configs, so dash will be installed to
initramfs.
Here avoid install dash by adding it to the '-o' list
Also remove dash dependency from rpm spec
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
s390x netdev need special cmdline to bring up
parse the ifcfg file to append proper cmdline, also add znet dracut module
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz806196
Adding check_size function for filesystem dump, also move common code to
top of the file because get_fs_size need know the mount point.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
The original blacklist patch was applied without conflict.
But in fact there's exactly same context with amerigo's original patch and
it's in wrong place!
Moving it to the right switch branch..
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
For the "blacklist" here, it means prevent the kernel modules
from loading into kdump initrd, which is different from RHEL6.
Signed-off-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
1. only append '-F' for default core_collector internally
2. error out if user does not add '-F' for makedumpfile
v1->v2: refresh because of new core collector verify function
v2->v3: optimize the code, remove local variable for default core_collector
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
1. add core_collector filter support to ssh dump
2. scp can be specified in kdump.conf
3. error out if no '-F' with makedumpfile
4. add proper explanation and examples to kdump.conf[.5] and kexec-kdump-howto.txt.
v1->v2: add verify_core_collector function
v2->v3: optimize the code, remove local variable for default core_collector
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz821997
while root is set to dump target, it can not be unmounted because plymouthd
are holding it. umount failing will cause calling of default_action.
Omit plymouth module to fix this issue.
Also drop "--add dash" or dracut will report error "dash is not found", this
is because default fedora dracut.conf will omit dash.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
dracut args pass through will be introduced later, remove this firstly.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
-d option is not implemented and unused, remove it from mkdumprd
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
BZ: 817044
Harald suggested that we use --add kdumpbase instead of -m kdumpbsae. As
-m means only use modules specified on the command line. I am not sure
that kdump will ever know the list of modules it wants to use. It might
be a good idea to let dracut decide it based on --mount option.
Also start using --hostonly to make sure atleast our default dumping to
root disk always works.
I also noticed that with --add and --hostonly initramfs size came down. So
for the time being just bring down the initramfs size.
But it still looks big and this area will require more experimentation and
bug fixing to make sure we are generatiing optimal size images for kdump
purposes and get rid of bloat. I am just beginning to understand dracut,
so expect more churn in this area down the line from me.
I am posting this patch for the bz opened again F18. As it is reducing
initramfs size significantly, I think it is a good idea to commit it
in F17 branch also.
Following is image size comparision.
Dump to root disk.
------------------
vanilla compressed: 13MB
hostonly compressed: 7.5MB
Dump to nfs
-----------
vanilla compressed: 24MB
hostonly compressed: 13MB
Dump over ssh
-------------
vanilla compressed: 23.5 MB
hostonly compressed: 12 MB
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Resolves: bz805783
kdumpctl: save_raw if found vmcore
mkdumprd: checking available size of raw disk
dracut module: do the dumping
Note, add a dir /kdumpscripts for monitor_dd_progress and future
kdump scripts
[v1->v2]: monitor_dd_process become a script instead of a function
add missed utils
use pipe with dc
[v2->v3]: Don: fix dd_progress_file typo
Vivek: move [ -f $conf_file ] earlier
don't split keyfile= and [ -f keyfile ]
move default core_collector earlier
move non-makedumpfile warnings to mkdumprd
make check available size a common function
Amerigo: use less pipe for grep then awk print
use shell (( )) instead of dc
use cut instead of awk
no need install dc and awk
make DD_BLKSIZE a variable
don't add 0755 file in git, chmod in module-setup.sh
[v3->v4]: vivek: kdumpctl multi raw target handling
monitor_dd_progress- fix wrong size calculation:
the tail -1 of dd pregress file is in bytes instead of blocks
only print the whole dd src file size for non-filtered case
check [ -b raw target device ] before dump
[v4->v5]: vivek: move check [ -b $1 ] before monitor_dd_progress
remove multi target function
[v5->v6]: vivek: only warning for raw dump of non-makedumpfile core_collector
[v6->v7]: kdumpctl should return 0 when there's no raw target
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Add ssh dump support
changes including below items:
1. sshkey option
2. sshkey propagate
3. fix a bug of _server ip calculation for dump target string
4. change the prefix of kdump hook from 93 to 01 to avoid dhclient and
other cleanups happening before us
5. enable network with dracut cmdline rd.neednet=1 when there's network
target config
[v1 - v2]:
Only check_ssh_target when there's ssh dump target in kdump config file
[v2 -> v3]
style fixes: trailing spaces and space before tab indent
remove set -x
simply check_ssh_target
use awk to get sshkey option value
change pivot hook order to 0000
Signed-off-by: Dave Young <dyoung@redhat.com>
