Re: [vserver] Bandwidth monitoring

From: Laurens Vets <laurens_at_daemon.be>
Date: Wed 24 Dec 2014 - 00:20:30 GMT
Message-ID: <8dea08f6bd56875c04b2ca463fd96b7d@daemon.be>

Does that mean that each vserver keeps its own statistics? Because
vnstat also parses that output:

user@vserver:~$ strace -e trace=file vnstat -tr 2
execve("/usr/bin/vnstat", ["vnstat", "-tr", "2"], [/* 12 vars */]) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libm.so.6", O_RDONLY) = 3
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY) = 3
open("/home/user/.vnstatrc", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/etc/vnstat.conf", O_RDONLY) = 3
open("/proc/net/dev", O_RDONLY) = 3
Sampling eth0 (2 seconds average)...open("/proc/net/dev", O_RDONLY)
    = 3
42 packets sampled in 2 seconds
Traffic average for eth0

       rx 8 kbit/s 10 packets/s
       tx 16 kbit/s 10 packets/s

user@vserver:~$

If I can just use vnstat that's fine by me, but I was under the
impression that these statistics were shared?

On 2014-12-23 16:08, Jean Weisbuch wrote:
> You can read how much data has transited on each network interfaces
> inside a guest by reading : /proc/net/dev
> You just have to take the value at first then wait some time, take
> the new value, substract the first one to the second then divide it by
> how long in seconds you waited between the two checks.
>
> If you want to check from the host, here is a script i made :
> http://paste.debian.net/137926/
>
> Le 24/12/2014 00:45, Laurens Vets a écrit :
>> Hi list,
>>
>> Is it possible to monitor the bandwidth of 1 particular guest from
>> inside that guest?
>>
>> Basically, I want to run vnstat inside a guest monitoring only the
>> traffic that guest generates. Is that possible somehow?
Received on Wed Dec 24 00:20:52 2014

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