[smokeping-users] New User and Trying to setup a Master/Slave topology

Nicolas MICHEL trash at nmichel.fr
Mon Apr 15 16:02:55 CEST 2013 

Hello Jim

root at ubuntu:/home/nml# ls -lua /var/lib/smokeping/Local/
total 8768
drwxr-xr-x 2 smokeping smokeping    4096 Apr 15 15:01 .
drwxr-xr-x 5 smokeping smokeping    4096 Apr 15 10:14 ..
-rw-r--r-- 1 smokeping smokeping 2986808 Apr 15 16:00 Google.rrd
-rw-rw---- 1 smokeping smokeping 2986808 Apr 15 15:50 Google~ubuntu.rrd
-rw-r--r-- 1 smokeping smokeping 2986808 Apr 15 16:00 LocalMachine.rrd
root at ubuntu:/home/nml#
root at ubuntu:/home/nml#
root at ubuntu:/home/nml#
root at ubuntu:/home/nml# groups www-data
www-data : smokeping
root at ubuntu:/home/nml# groups smokeping
smokeping : smokeping
root at ubuntu:/home/nml#


In this setup the smokeping use can write the file and the www-data can 
read the file ...

Timestamps shows that RRD are not getting updated ...

I have no idea where to find the cache file because these maybe need 
permissions too ... :(
Le 4/15/2013 3:54 PM, Jim Long a écrit :
> The Smokeping user has to be able to WRITE to the in order
> for updates to work.  The Apache group needs to be able to
> READ the file in order to display the image to a web browser.
>
> chown smokeping:www-data foo-bar.rrd
>
> is perhaps what you want.
>
> Jim
>
>
> On Mon, Apr 15, 2013 at 02:37:03PM +0200, Nicolas MICHEL wrote:
>> Hi again.
>>
>> I have read several blogpost about it and it appears that there is
>> definitely a problem with the rights setup by default on the server
>>
>> At the begining the GOOGLE_FR.rrd and the GOOGLE_FR~ubuntu.rrd *slave*
>> had the same right and were owned by the same user and group =>
>> smokeping:smokeping.
>>
>> I have seen that the apache user need to be "chowned" to this RRD  so I
>> did :
>> chown www-data:www-data /var/lib/smokeping/Local/GOOGLE_FR~ubuntu.rrd
>> chmod  666 /var/lib/smokeping/Local/GOOGLE_FR~ubuntu.rrd
>>
>> I know this is dirty and that most of you will feel the need to take a
>> shower as they saw this but this is only for testing purpose and to
>> understand what I am doing or not doing.
>>
>> root at ubuntu:/home/nml# ls -lua /var/lib/smokeping/Local/
>> total 8780
>> drwxr-xr-x 2 smokeping smokeping    4096 Apr 15 14:09 .
>> drwxr-xr-x 5 smokeping smokeping    4096 Apr 15 10:14 ..
>> -rw-r--r-- 1 smokeping smokeping 2986808 Apr 15 14:30 GOOGLE_FR.rrd
>> -rw-rw-rw- 1 www-data  www-data  2986808 Apr 15 14:25
>> GOOGLE_FR~ubuntu.rrd
>> -rw-r--r-- 1 smokeping smokeping 2986808 Apr 15 14:30 LocalMachine.rrd
>>
>> The problem is that the slave RRD is not getting updated as you can see
>> above 14:25 vs 14:30
>>
>>
>> Here are the websites I have used for reference.
>> Thanks for your help .... :)
>>
>> https://lists.oetiker.ch/pipermail/smokeping-users/2011-March/004287.html
>> https://lists.oetiker.ch/pipermail/smokeping-users/2009-January/003493.html
>> https://lists.oetiker.ch/pipermail/smokeping-users/2007-October/002502.html
>> http://oss.oetiker.ch/smokeping/doc/smokeping_master_slave.en.html
>>
>>
>>
>> Nicolas
>>
>>
>>
>>
>>
>>
>>
>> Le Monday, April 15, 2013 10:02:49 AM, Nicolas MICHEL a ??crit :
>>> Hey guys.
>>>
>>> Thanks for your help.
>>>
>>>
>>> Staticsafe your hints did the trick. I can now see trafic from my
>>> slave to my properly configured targets.
>>> But there is one more problem, I cannot see the graphs and I guess
>>> there is something wrong in some apache files/directory as this old
>>> email states:
>>>
>>> http://comments.gmane.org/gmane.network.smokeping.user/5043
>>>
>>>
>>> I am currently searching for a solution to my problem but my lack of
>>> Linux knowledge is killing me ...
>>> If someone has some insights, that would be great !
>>>
>>> Thanks a lot to all of you !
>>>
>>> Nicolas
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Le Thursday, April 11, 2013 8:07:54 PM, staticsafe a ??crit :
>>>> On 4/11/2013 3:29, Trash NMICHEL wrote:
>>>>> Hi and thanks for your insights :!
>>>>>
>>>>> Here is what I did :
>>>>>
>>>>> ****** MASTER*******
>>>>>
>>>>>
>>>>> root at ubuntu:/home/nml# ls -lua /etc/smokeping/
>>>>> total 44
>>>>> drwxr-xr-x  3 root      root      4096 Apr 11 09:05 .
>>>>> drwxr-xr-x 86 root      root      4096 Apr 11 09:04 ..
>>>>> -rw-r--r--  1 root      root       191 Apr 10 22:33 apache2.conf
>>>>> -rw-r--r--  1 root      root      2031 Apr 10 22:36 basepage.html
>>>>> -rw-r--r--  1 root      root       290 Apr 10 22:33 config
>>>>> drwxr-xr-x  2 root      root      4096 Apr 11 09:12 config.d
>>>>> -r--------  1 smokeping www-data    19 Apr 11 09:05 slave-secrets
>>>>> -r--------  1 smokeping www-data     5 Apr 11 09:05 slavesecrets.conf
>>>>> -rw-r--r--  1 root      root      1564 Apr 10 22:33 smokemail
>>>>> -rw-r-----  1 smokeping smokeping   59 Apr 10 22:33 smokeping_secrets
>>>>> -rw-r--r--  1 root      root      3815 Apr 10 22:33 tmail
>>>>>
>>>>>
>>>>> root at ubuntu:/home/nml# cat /etc/smokeping/slavesecrets.conf
>>>>> test
>>>>> root at ubuntu:/home/nml# cat /etc/smokeping/slave-secrets
>>>>> ubuntu:test
>>>>>
>>>>> root at ubuntu:/home/nml# cat /etc/smokeping/config.d/Slaves
>>>>> *** Slaves ***
>>>>> secrets=/etc/smokeping/slave-secrets
>>>>> #+boomer
>>>>> #display_name=boomer
>>>>> #color=0000ff
>>>>>
>>>>> #+slave2
>>>>> #display_name=another
>>>>> #color=00ff00
>>>>>
>>>>> +ubuntu
>>>>> display_name=ubuntu
>>>>> color=00ff00
>>>>>
>>>>>
>>>>> root at ubuntu:/home/nml# cat /etc/smokeping/config.d/Targets
>>>>> *** Targets ***
>>>>>
>>>>> probe = FPing
>>>>>
>>>>> menu = Top
>>>>> title = Network Latency Grapher
>>>>> remark = Welcome to the SmokePing website of xxx Company. \
>>>>>            Here you will learn all about the latency of our network.
>>>>>
>>>>> + Local
>>>>>
>>>>> menu = Local
>>>>> title = Local Network
>>>>> #parents = owner:/Test/James location:/
>>>>>
>>>>> ++ LocalMachine
>>>>>
>>>>> menu = Local Machine
>>>>> title = This host
>>>>> host = localhost
>>>>> #alerts = someloss
>>>>>
>>>>>
>>>>> ++ Site1
>>>>>
>>>>> menu = SLAVE
>>>>> title = SLAVE_TITLE
>>>>> host = google.fr
>>>>> slaves = ubuntu
>>>>>
>>>>> root at ubuntu:/home/nml#
>>>>> ****** SLAVE*******
>>>>>
>>>>> root at ubuntu:/etc/smokeping# cat /etc/default/smokeping
>>>>> # /etc/default/smokeping: Startup configuration for smokeping(1)
>>>>> #
>>>>> # select master or slave mode
>>>>> MODE=slave
>>>>> # in master mode, the rest of the configuration is in
>>>>> # /etc/smokeping/config
>>>>> #
>>>>> # in slave mode, uncomment and set the following variables too
>>>>> # see smokeping(1)
>>>>> #
>>>>> # Mandatory configuration
>>>>> MASTER_URL=http://172.16.119.236/cgi-bin/smokeping.cgi
>>>>> SHARED_SECRET=/etc/smokeping/slavesecrets.conf
>>>>> #
>>>>> # Optional configuration
>>>>> SLAVE_NAME=ubuntu
>>>>>
>>>>>
>>>>> root at ubuntu:/etc/smokeping# ls -lus
>>>>> total 32
>>>>> 4 -rw-r--r-- 1 root      root       191 Apr 10 22:35 apache2.conf
>>>>> 4 -rw-r--r-- 1 root      root      2031 Apr 10 22:37 basepage.html
>>>>> 4 -rw-r--r-- 1 root      root       290 Apr 10 22:35 config
>>>>> 4 drwxr-xr-x 2 root      root      4096 Apr 10 22:34 config.d
>>>>> 4 -r-------- 1 smokeping root         5 Apr 11 09:17 slavesecrets.conf
>>>>> 4 -rw-r--r-- 1 root      root      1564 Apr 10 22:35 smokemail
>>>>> 4 -rw-r----- 1 smokeping smokeping   59 Apr 10 22:35 smokeping_secrets
>>>>> 4 -rw-r--r-- 1 root      root      3815 Apr 10 22:35 tmail
>>>>> root at ubuntu:/etc/smokeping# cat /etc/smokeping/slavesecrets.conf
>>>>> test
>>>>>
>>>>>
>>>>> When I restart the master, everything goes fine ...
>>>>>
>>>>> When I restart the slave ... it can connect to the master but I get
>>>>> this
>>>>> error :
>>>>> root at ubuntu:/etc/smokeping# /etc/init.d/smokeping restart
>>>>>    * Shutting down latency logger daemon smokeping
>>>>> start-stop-daemon: warning: failed to kill 942: No such process
>>>>>      ...done.
>>>>>    * Starting latency logger daemon smokeping
>>>>> WARNING: Opening secrets file /etc/smokeping/slave-secrets: Permission
>>>>> denied
>>>>>
>>>>> ERROR: we did not get config from the master. Maybe we are not
>>>>> configured
>>>>> as a slave for any of the targets on the master ?
>>>>>      ...done.
>>>>>
>>>>>
>>>>> I was thinking more about a permission error but then I did this on the
>>>>> MASTER:
>>>>>
>>>>> root at ubuntu:/home/nml# chmod 777 /etc/smokeping/slave-secrets
>>>>>
>>>>> Then the master is not working any more :
>>>>>
>>>>> root at ubuntu:/home/nml# /etc/init.d/smokeping restart
>>>>>    * Shutting down latency logger daemon smokeping
>>>>>      ...done.
>>>>>    * Starting latency logger daemon smokeping
>>>>> ERROR: /etc/smokeping/config.d/Slaves, line 2: File
>>>>> '/etc/smokeping/slave-secrets' is world-readable or writable,
>>>>> refusing it
>>>>>      ...done.
>>>>>
>>>>>
>>>>> Can someone help a Linux noob ? :P
>>>>>
>>>>> Thanks for your help guys
>>>>>
>>>>>
>>>>> Nic
>>>> [..] Snipping due to overly long quoting.
>>>>
>>>> The key error is this:
>>>> ERROR: /etc/smokeping/config.d/Slaves, line 2: File
>>>> '/etc/smokeping/slave-secrets' is world-readable or writable,
>>>> refusing it
>>>>      ...done.
>>>>
>>>> This is an error on the *Master*, the file needs to be *readable* by the
>>>> smokeping user and the www-data group.
>>>>
>>>> On the master:
>>>>
>>>> $ chown smokeping:www-data /etc/smokeping/slave-secrets
>>>> $ chmod 440 /etc/smokeping/slave-secrets
>>>>
>>>> That should solve the "Permission denied" error from the slave.
>>>>
>>>> Essentially the issue was that the file was only *readable* by the
>>>> smokeping user on the master but not the www-data group as it needs to
>>>> be for the slave to pull the file.
>>>>
>>>> -r--------  1 smokeping www-data    19 Apr 11 09:05 slave-secrets
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