[smokeping-users] RRD files being created, but the graphs are not updating

[masonke]

This really looks like a permissions issue, but I just can’t find it. In desperation, I made all the red files and directories that hold them 777, just to see what would happen. It did not change anything. 

It is almost like the process that moves the data from the slave.cache files into the rrd file is not running.  If I reboot the master, all the backlogged slave_cache data is added to the rrd and you can see it on the graphs.

Really is a crazy thing with the secrets file, the error is on the slave, not the master.

I will can the whole thing and restart from scratch if I can’t get it fixed by noon tomorrow. 


~KEM

> On Jun 1, 2016, at 15:44, Gregory Sloop <gregs at sloop.net> wrote:
> 
> 
> 
> 
> This was a working distributed environment with 8 slaves, all running on 14.04 with smokeping 2.006008.
> 
> Had a reboot of the smokeping master this am and have had crazy problems ever since. As part of the troubleshooting for this, we upgraded the master to 2.006011
> 
> Cannot display graphs, even the master tests. In the directories, the .slave_cache files are being created. But, the corresponding rrd files are not being updated. 
> 
> The smokeping_secrets file is really strange now. Before it was 600 smokeping:smokeping and everything worked. After the update, once the master process is up, I have to set it to 640 smokeping:www-data to get the slaves to connect. Otherwise I get this error on the slave:
> 
> * Starting latency logger daemon smokeping
>    WARNING: Opening secrets file /etc/smokeping/smokeping_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.
> 
> Any ideas what is going on, or where I can look? The lack of graphs from the master is really confusing
> 
> Apache is Apache/2.4.7
> RRDTool is 1.5.5
> 
> 
> It sounds like a permissions issue.
> How much time have you spent trying to make sure permissions are correct?
> 
> [It sounds like you know what you're doing, but this is a common issue and virtually always it runs down as a permission issue. My apologies if that doesn't fit your case, but it sure sounds likely.]
> 
> The master RRD's need to be able to write to the files/directory as whomever smokeping is running as.
> The slave RRD's need to be writeable as whatever web-server you're using is running as. [Apache]
> [To *write* the data from smokeping/fping et al.]
> 
> Both need read access for the web-server/apache. [To *display* the graph data.]
> 
> I don't recall exactly what users those typically are for Ubuntu 14 - but double check.
> 
> ---
> Quick, note if the RRD's are getting their time-stamps updated as new data should get written. If not, you've got a write problem.
> If they are, you've got a read problem.
> 
> I have no idea why the permissions would have changed though.
> 
> -Greg
> 

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