DISK UNKNOWN - free space

[Jake Solid]

*When I run the command from the machine, it outputs the correct
information. The problem is when using NRPE from the nagios server.*

[root at my_monitored_server ~]# /usr/lib64/nagios/plugins/check_disk -w 20% -c
10% -p /dev/mapper/VolGroup01-fredVol00
DISK CRITICAL - free space: /vservers/fred/data 5798 MB (5% inode=99%);|
/vservers/fred/data=109009MB;96760;108855;0;120951

*I'm using CentOS 5 -* Linux my_monitored_server 2.6.22.9-vs2.3.0.27.1 #1
SMP Thu Oct 11 15:21:13 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux

*Here is the output using strace:

*[root at my_monitored_server ~]# strace /usr/lib64/nagios/plugins/check_disk
-w 20% -c 10% -p /dev/mapper/VolGroup01-fredVol00
*execve("/usr/lib64/nagios/plugins/check_disk",
["/usr/lib64/nagios/plugins/check_"..., "-w"..., "20%"..., "-c"...,
"10%"..., "-p"..., "/dev/mapper/VolGroup01-fredVol00"], [/* 24 vars */]) = 0
brk(0)                                  = 0x61a000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x2b4c07095000
uname({sys="Linux", node="vhost6.latpro.com", ...}) = 0
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=85789, ...}) = 0
mmap(NULL, 85789, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b4c07096000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY)      = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\331!\331:\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1678480, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x2b4c070ab000
mmap(0x3ad9200000, 3461272, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0x3ad9200000
mprotect(0x3ad9344000, 2097152, PROT_NONE) = 0
mmap(0x3ad9544000, 20480, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x144000) = 0x3ad9544000
mmap(0x3ad9549000, 16536, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3ad9549000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x2b4c070ac000
arch_prctl(ARCH_SET_FS, 0x2b4c070ac260) = 0
mprotect(0x3ad9544000, 16384, PROT_READ) = 0
mprotect(0x3ad8419000, 4096, PROT_READ) = 0
munmap(0x2b4c07096000, 85789)           = 0
brk(0)                                  = 0x61a000
brk(0x63b000)                           = 0x63b000
open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=55529168, ...}) = 0
mmap(NULL, 55529168, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b4c070ad000
close(3)                                = 0
open("/etc/mtab", O_RDONLY)             = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=485, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x2b4c0a5a2000
read(3, "/dev/mapper/VolGroup00-LogVol02 "..., 4096) = 485
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0x2b4c0a5a2000, 4096)            = 0
stat("/dev/mapper/VolGroup01-fredVol00", {st_mode=S_IFBLK|0660,
st_rdev=makedev(253, 3), ...}) = 0
statfs("/vservers/fred/data", {f_type="EXT2_SUPER_MAGIC", f_bsize=4096,
f_blocks=30963705, f_bfree=3057391, f_bavail=1484527, f_files=15728640,
f_ffree=15725959, f_fsid={-1443977114, -797195186}, f_namelen=255,
f_frsize=4096}) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x2b4c0a5a2000
write(1, "DISK CRITICAL - free space: /vse"..., 124DISK CRITICAL - free
space: /vservers/fred/data 5798 MB (5% inode=99%);|
/vservers/fred/data=109009MB;96760;108855;0;120951
) = 124
exit_group(2)                           = ?**

*


On Jan 11, 2008 11:06 AM, Dennis Jenkins <djenkins at istreamimaging.com>
wrote:

> Jake Solid wrote:
> > When I use the filesystems unstead of the mount points in the nrpe.cfg
> > it works fine with disks 1, 2 and 3. The only disk that nrpe is not
> > able to read is disk4 which is mounted on /vservers/fred/data.
>  From one of your previous posts:
>
> *The one I was having issues with is:*
> command[check_disk4]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10%
> -p /dev/mapper/VolGroup01-fredVol00
> *
> Which is mounted on*
> /dev/mapper/VolGroup01-fredVol00     119G  107G  5.8G  95%
> /vservers/fred/data
>
>
> That is a pretty big volume (well, big to me since I grew up with 540M
> being HUGE).  I have a similar problem using "check_disk" to verify the
> free space on a 16 Terabyte volume (on Solaris 10).  Please humor me and
> read the post that I made to this group on 2008-1-7 at 4:28pm (CST).
>
> I don't remember what OS you are using... But please run the
> "check_disk" program through the syscall logger for your OS.
>
> On Linux:
> strace /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p
> /dev/mapper/VolGroup01-fredVol00
>
> On Solaris:
> truss /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p
> /dev/mapper/VolGroup01-fredVol00
>
> On FreeBSD (from memory, I could be wrong):
> ktrace /usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p
> /dev/mapper/VolGroup01-fredVol00
>
>
> Near the bottom you should see a call to "statvfs" or something similar
> (again, read my post first).
>
> Do you have the same error that I do?  In my case, the nagios-plugins
> package was compiled without support for "fs64", so it used the older
> "statvfs" which can't handle huge disk volumes.  The kernel call
> returned an error instead of the volume info.
>
>
>
>
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