Generate Nagios config for NetApp filers

Christian Leave a comment

At some point in the last few weeks, I repeatedly had to recreate my Nagios config for currently six filers. After doing that a few times, I ended up (like sooo often) writing a short Bash script, that’ll do this for me – without any fuss.

The only thing the script needs, is that the filers and the filers are registered in DNS … Here’s an example:

With that done, the script will create the necessary Nagios config for those filers.

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NetApp: Establishing SnapMirror relationships

Christian Leave a comment

After figuring out the SnapVault stuff, I needed to implement a whole bunch of SnapMirror relations. As I am lazy (as in click-lazy), I ended up writing a somewhat short Bash script, that’ll either establish a bunch of SnapMirror relations (for a single host) or just for a single volume.

The script expects, that SSH public key authentification has been set up, and that the source for the SnapMirror exists and is online/not-restricted.

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NetApp: SnapVault snapshot retention for non-standard snapshot names

Christian Leave a comment

Well, the name says it pretty much. Once you rename the snapshot on the SnapVault destination from daily.0 to something else, the whole builtin SnapVault snapshot retention isn’t gonna work anymore.

Back when I started all the code-writing, I wasn’t aware of this. One of my co-worker complained to me about it on Wednesday that there are an assfull of snapshots on the SnapVault destination (one snapshot each day since the end of October, meaning more than 50 snapshots per volume, in a total of 12 or so FlexVolumes, making the total about 500 snapshots).

So I took the time to write this little Bash script (yeah, I know I’m mixing a bunch of languages – I really like the KISS principle), which will get the necessary information from the filer (snapvault snap sched needs to be set) and then deletes the over-aged snapshots.

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NetApp: Monitoring of SnapVault/SnapMirror/LUN/Snapshot information with Nagios

Christian 4 Comments

As I wrote before, we have a bunch of filers (and a ton of volumes w/ luns on them), that I need to monitor. At first, I tried the existing NetApp Nagios-Plugin(s), but they all use SNMP and with that I can either watch all volumes or none. And that didn’t satisfy me.

Don’t get me wrong, the existing plugins are okay and I still use them for stuff (like GLOBALSTATUS or FAN/CPU/POWER) which isn’t present in the API or real hard to get at, however I wanted more. So I ended up looking at the NetApp API, and ended up writing a “short” plugin for Nagios using Perl.

Maybe if I’m ever bored, I’ll rewrite it using C, but for now the Perl plugin has to suffice.

So far the plugin supports the following things:

  • Monitoring FlexVolumes (simply watching the free space)
  • Monitoring LUN space (the allocated space inside a FlexVolume for iSCSI/FC LUNs)
  • Monitoring Snapshot space (the allocated space inside a FlexVolume for Snapshots)
  • Monitoring SnapVault relations (and their age)
  • Monitoring SnapMirror relations (and their age)

The plugin will return performance data for most (if not all) of those classes. It needs a user on the filer you wish to monitor – which sadly needs to have the admin role.

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NetApp: Archive SnapManager SQL snapshots

Christian 1 Comment

As I wrote before, we’re using SnapManager (for SQL/Oracle) to create consistent snapshots. However my database guys don’t want to name their snapshots daily.<increment> (which I can understand), as once you archive those snapshots to a secondary (and tertiary) system, the names become junk.

So, they’re naming the snapshots like snap__vcsrv_29_12_2012-10.00.01. Sadly, when it comes to SnapVault, it expects the names in form of daily.<increment> otherwise you won’t be able to transfer the snapshots with the CLI (none that I have found anyway).

But we didn’t want to move away from naming the snapshots the way they are, so I ended up writing a PowerShell script, that once triggered archives the Snapshots needed for a set of databases. It took me a while to figure a bunch of stuff out, but in the end I think I have a working way of archiving custom-named snapshots.

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Implementing SnapVault backups – the hard way

Christian 1 Comment

Well, I recently had the pleasant task of implementing SnapVault backups, that are being shipped to an offsite location with SnapMirror.

That in itself isn’t the bad thing, however we decided against Protection Manager (since it was a charged product back when we decided on this). So I basically had the three tasks:

  1. Actually implement the SnapVault stuff (and learn my way around it and also document it)
  2. Write a bunch of scripts, that help us in creating scheduled backups of our databases
  3. Create a monitoring script, that’ll fit into our Nagios environment already in place

Well, two months later (sadly it still has some kinks – I can’t figure out this one bug though for the life of it) and a few hundred hours of working on/with it and out came four things:

  1. Bash-scripts to create the SnapVault/SnapMirror relations
  2. Powershell scripts to trigger the SnapVault updates
  3. a Nagios plugin, based on NetApp’s SDK for Data ONTAP (even if the API is crap from time to time – it’s still better than using SNMP)

I’ll post those things one after another, once I wrote up all the articles.

Recent downtime

Christian Leave a comment

Well, you might have noticed that barfoo.org hasn’t been available for the last week or so … I had to change the DNS provider (thanks at this point again to Bene from xnull.de for putting me up as long as he did).

Sadly my new provider, when purchasing the domain hosting, doesn’t allow sub-domains. So after opening a service ticket with them, they switched me into a webhosting contract which allows sub-domains (wtf…).

And since today, everything should be available again. If you notice something missing/not working give me a holler.