Everything is a Freaking DNS problem

A couple of weeks a go Brian Profitt pinged me for a chat about Devops , the result of that chat , his article can now be found on the Zenoss blog, it's titled Datacenter Barometer: Better days arrive when dev meets ops

It's a very nice read with some pointers to places regular readers of my blog should already know ;)
So with lots of leading Open Source infrastructure companies on different levels, such as config management (OpsCode and Reductive Labs) , monitoring (Zenoss) , deployment (openQRM, RPath, and obviously Consultancy companies , the upcoming Devops conferences around the planet promise to be a lot of fun ! ;)

Oh, and apparently there is some more on the story on /.

Technorati Tags: devops ha krisbuytaert monitoring opensource zenoss

When you pull out a disk from your Raid setup it shows a warning in syslog

Jan 27 10:18:22 EL860 kernel: 3w-9xxx: scsi0: AEN: WARNING (0x04:0x0019): Drive 
removed:port=1.
Jan 27 10:18:22 EL860 kernel: 3w-9xxx: scsi0: AEN: ERROR (0x04:0x0002): Degraded
 unit:unit=0, port=1.

However if no one is looking at syslog that won't really be helpfull.

3Ware provides a tool from their site called tw_cli which can be used to manage
the raid setup from the command line.

[EL860-root@EL860 admin]# tw_cli /c0 show 
 
Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache  AVrfy
------------------------------------------------------------------------------
u0    RAID-1    REBUILDING     41%     -       -       232.82    RiW    ON     
 
VPort Status         Unit Size      Type  Phy Encl-Slot    Model
------------------------------------------------------------------------------
p0    OK             u0   232.88 GB SATA  0   -            ST3250310NS         
p1    DEGRADED       u0   232.88 GB SATA  1   -            ST3250310NS         

I'd figure I'd either have to write wrapper script around that or find some other way of integrating it.
Asking the question on ##infra-talk on irc.freenode.net gave me the following link to a check script on github

koollman: sdog: something like http://github.com/stanaka/check_tw should work.

With that in your snmpd.conf you can get the info via snmp

[root snmp]#  snmpwalk  localhost   -v 2c  -c public  .1.3.6.1.4.1.2
021   | grep ext 
UCD-SNMP-MIB::extIndex.1 = INTEGER: 1
UCD-SNMP-MIB::extNames.1 = STRING: TW_RAID
UCD-SNMP-MIB::extCommand.1 = STRING: /usr/local/sbin/check_tw
UCD-SNMP-MIB::extResult.1 = INTEGER: 2
UCD-SNMP-MIB::extOutput.1 = STRING: CRITICAL: Unit: u0, Type: RAID-1, Status: RE
BUILDING
UCD-SNMP-MIB::extErrFix.1 = INTEGER: 0
UCD-SNMP-MIB::extErrFixCmd.1 = STRING: 
UCD-SNMP-MIB::ssSysContext.0 = INTEGER: 2073
UCD-SNMP-MIB::ssRawContexts.0 = Counter32: 11781783
UCD-DLMOD-MIB::dlmodNextIndex.0 = INTEGER: 1

Technorati Tags: 3w-9xxx 3ware didimentionihateraid linux monitoring opensource raid snmp

Ronald Bradford wants to know what kind of Monitoring you use..
He specifically wants to know about Alerting tools

There's different cases , looking at it from a full infrastructure point my current favourite is Zabbix or good old Nagios,

But when looking at it from a debugging perspective you have MySQLAR or Hyperic, but those aren't in the alerting list.

However, when you are building HA clusters, you have custom scripts running either from mon or from pacemaker ..

Still .. Ronald probably wants more input :)

Technorati Tags: ha monitoring msql zabbix zenos

I found the initial announcement in my Spambox, thats where I send all the mails from GroundWork as unsubscribing from their marketing lists doesn't seem to work ..

Tarus pointed it out.. he already mentionned Marketing, low community imput etc..

Nevertheles I had a look, and my first and last impression was, NagiosForge, no active community, and empty pages on other imvho more relevant Monitoring Projects created by GroundWork employees.

Big John coined the "to pull a GroundWork" phrase aiming at their early products, err logo placements. When we were evaluating differen Open Source monitoring tools for our OLS paper about 18 months ago we looked at the tool and it didn't make the cut .. it failed in all areas where it claimed to be strong, ease of installation , lack of errorhandling during the installation, etc ... some while later another collegue tried again and we ran into similar problems

Yet some people claim it to be a great product.. I'm not a fan yet ...maybe one day they they'll know to convince me .. but for now
When I need Nagios .. I`ll be looking at Djagios , Opsview , Icinga or the real thing.

However, ther's still Hyperic, Zenoss and Zabbix :)

Technorati Tags: hyperic icinga look no link monitoring nagios zabbix zenos

As mentioned earlier , Packt sent me their Zenos Core Network and Systems Monitoring by Michael Badger to review.

So I spend the past couple of weeks trying to crawl my way trough it. Not that there was any problem with the book, more with my schedule :) I was hoping to finish it some time ago but time was working against me, even last week when my flight back from Zurich was a bit shorter than planned I couldn't finish reading the book.

But yesterday I managed, Michael managed to write a good book on a hot topic during what was probably one of the most busy of his life.

In 8 chapters Michael manages to explain the different aspects of Zenoss fairly well, he even touches the creation of ZenPacks and extending Zenoss in general also.

It was a fairly good read and showed me a couple of new insights into Zenoss.

However although Zenoss is heavily SNMP based there is little information on SNMP in general and MIB more in detail ? People really new to systems monitoring might want to have a couple of more pages on these topics.

For those not familiar to Zope the mentioning of TALES expressions might also raise some eyebrows, luckily there has been a full Appendix dedicated to it.

Time permitting I would have hoped he could of gone a bit more in detail on creating a ZenPack that did a bit more than checking the status of a page. Looking into the status of an Apache or MySQL or other relevant daemon , or the Squid internal statistics

But if you are new to Zenoss and you want to have a quick headstart into monitoring your infrastructure with it this book is a really really good start.

There's a free preview Chapter at Scribd.com and also at Packt

Technorati Tags: bookreview monitoring zenoss

Zennoss has announced the entries for their zenpack contest . What strikes me is that there is not a single entry that plans on monitoring Xen, KVM, VirtualBox or any of the other Open Source virtualization technologies .. Not in the contest entries and not in the existing community packs .

This sounds like a big opportunity to me :)

Technorati Tags: monitoring open source opensource virtualization xen zenoss

My Conference schedule is growing again. In about 2 weeks I`ll be in Ottawa at the Ottawa Linux Symposium.

I`ll be giving 2 talks there, the first at the Virtualization Miniconference where I`ll be discussing the new openQRM 4 and it's new Drupal style plugin management.

And my second talk will be together with my collegue Tom and we'll be talking about Systems Monitoring We'll be looking at how you can keep an eye on your infrastructure with open source tools

So after 2 talks at the LinuxKonference in Germany a trip to Linux.conf.au I`ll finally be visiting OLS :) I've looked a the OLS schedule and it obviously looks very interesting.

In september I`ll be talking about the Open Source Virtualization landscape at Open Expo Switzerland in Zurich .

If you run into me don't hesitate to chat .. always interrested in meeting new people.

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