Hello Steve,

Thanks for you reply! Here is what I get when I do an strace.

I guess the container need a dedicated disk device and since it doesn't have one at the momet, its seg faulting. How would I share a disk device with a container?


[root <at> rajeshr-linux bin]# strace ./monitord -s localhost -p 8367 -d -v
execve("./monitord", ["./monitord", "-s", "localhost", "-p", "8367", "-d", "-v"], [/* 17 vars */]) = 0
brk(0)                                  = 0x9c4f000
uname({sys="Linux", node="rajeshr-linux", ...}) = 0
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=9708, ...}) = 0
mmap2(NULL, 9708, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7ffb000
close(3)                                = 0
open("/lib/libpthread.so.0", O_RDONLY)  = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\360G\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=127700, ...}) = 0
mmap2(NULL, 94688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x888000
mmap2(0x89c000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13) = 0x89c000
mmap2(0x89e000, 4576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x89e000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320`\1\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1670312, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffa000
mmap2(NULL, 1390032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2d1000
mmap2(0x41f000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14e) = 0x41f000
mmap2(0x422000, 9680, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x422000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ff9000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7ff96c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x41f000, 8192, PROT_READ)     = 0
mprotect(0x89c000, 4096, PROT_READ)     = 0
mprotect(0x856000, 4096, PROT_READ)     = 0
munmap(0xb7ffb000, 9708)                = 0
set_tid_address(0xb7ff9708)             = 3761
set_robust_list(0xb7ff9710, 0xc)        = 0
rt_sigaction(SIGRTMIN, {0x88c2e0, [], SA_RESTORER|SA_SIGINFO, 0x895290}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x88c360, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x895290}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=10240*1024, rlim_max=RLIM_INFINITY}) = 0
uname({sys="Linux", node="rajeshr-linux", ...}) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
brk(0)                                  = 0x9c4f000
brk(0x9c70000)                          = 0x9c70000
open("/etc/resolv.conf", O_RDONLY)      = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=20, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffd000
read(4, "nameserver 10.0.2.1\n", 4096)  = 20
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb7ffd000, 4096)                = 0
uname({sys="Linux", node="rajeshr-linux", ...}) = 0
socket(PF_FILE, SOCK_STREAM, 0)         = 4
fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK)  = 0
connect(4, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(4)                                = 0
socket(PF_FILE, SOCK_STREAM, 0)         = 4
fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK)  = 0
connect(4, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(4)                                = 0
open("/etc/nsswitch.conf", O_RDONLY)    = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=1696, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffd000
read(4, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1696
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb7ffd000, 4096)                = 0
open("/etc/ld.so.cache", O_RDONLY)      = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=9708, ...}) = 0
mmap2(NULL, 9708, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7ffb000
close(4)                                = 0
open("/lib/libnss_files.so.2", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340\30\0\0004\0\0\0"..., 512) = 512
fstat64(4, {st_mode=S_IFREG|0755, st_size=50840, ...}) = 0
mmap2(NULL, 45712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x649000
mmap2(0x653000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x9) = 0x653000
close(4)                                = 0
mprotect(0x653000, 4096, PROT_READ)     = 0
munmap(0xb7ffb000, 9708)                = 0
open("/etc/host.conf", O_RDONLY)        = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=17, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffd000
read(4, "order hosts,bind\n", 4096)     = 17
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb7ffd000, 4096)                = 0
futex(0x4237e0, FUTEX_WAKE, 2147483647) = 0
open("/etc/hosts", O_RDONLY)            = 4
fcntl64(4, F_GETFD)                     = 0
fcntl64(4, F_SETFD, FD_CLOEXEC)         = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=42, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffd000
read(4, "127.0.0.1 localhost.localdomain "..., 4096) = 42
close(4)                                = 0
munmap(0xb7ffd000, 4096)                = 0
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffd000
write(1, "Just defined sockaddr->sin_addr."..., 50Just defined sockaddr->sin_addr.in_addr=(100007f)
) = 50
open("/proc/stat", O_RDONLY)            = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ffc000
read(4, "cpu  107 0 137 3102929 8 0 0 0\nc"..., 4096) = 159
close(4)                                = 0
munmap(0xb7ffc000, 4096)                = 0
open("/proc/diskstats", O_RDONLY)       = -1 ENOENT (No such file or directory)
--- SIGSEGV (Segmentation fault) <at> 0 (0) ---
+++ killed by SIGSEGV +++

Thanks,
Vidhya

On Fri, Jun 26, 2009 at 12:06 PM, Steven Tardy <sjt5-Q2pGrLd+7x9cusGGlJDZ6w@public.gmane.org> wrote:

Vidhya Nagarajan wrote:

Hello everyone,

I am new to OpenVZ and so far I have liked it a lot. The Quick installation
guide is extremely useful. I am trying to run a thermal emulation model
inside a container. I have installed all the necessary packages, However,
When I run the thermal emulation software which basically collects the power
consumed by the components(cpu,network,disk) of the machine, I get a
segmentation fault. When I run the same in the host node, I don't get any
error and the software runs smoothly.

For the thermal emulation model I need to set the /dev/sda properly. However
when I tried to run /dev from the container I could not get sda or hda but
rather found "pts". what does that mean?

>From inside the container :

[root <at> rajeshr-linux bin]# ./monitord -p 8367 -s localhost -d -v
Just defined sockaddr->sin_addr.in_addr=(100007f)
Segmentation fault

Is it because the container is not given access to the power modules in the
host node? I have mounted three of the folders from the host node to the
container using the command

that software probably reads from something in /proc

troubleshooting 101 (strace):
 strace ./monitord -p 8367 -s localhost -d -v

see what errors strace returns

--
Steven Tardy
Systems Programmer
Information Technology Infrastructure
Information Technology Services
Mississippi State University
sjt5-Q2pGrLd+7x/GPkg1PMG5MA@public.gmane.orgedu
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