Monitoring and graphing Weblogic performance using Graphite and metrics-sampler

My current project is to take our Weblogic monitoring setup from parsing gc logs in Splunk up to the next level. For other things metrics we do use Graphite already. Graphite is an awesome app for graphing any sort of metrics. You just need to get them in there somehow. Some days ago I stumbled over an outstanding piece of software written by Dimo Velev: metrics-sampler

Indexing and searching Weblogic logs using Logstash and Graylog2

Update 2013/10: we decided to replace Graylog2 with Kibana3 completely. The article below is just for reference, the logstash config is outdated since logstash 1.2 and the setup as described below is suboptimal anyway. I'll post a new article shortly.

Update 2014/02: Finally, the new guide is here: Indexing and searching Weblogic logs using Logstash, Elasticsearch and Kibana.


Using OpenSUSE's snapper on ArchLinux to manage btrfs snapshots

Today I created a PKGBUILD for OpenSUSE's snapper utility which allows creating and managing BTRFS snapshots. You can find it on AUR here.

Snapper is a quite handy tool to manage BTRFS snapshots. On OpenSUSE it comes with a YaST2 plugin, so it even has a GUI. On Arch you can still get the command line version though.

Trying Gnome3.. ah wait.. it still can't handle seperate X screens

From time to time I like to take a look at new things, like e.g. Gnome3 and its gnome-shell.

My setup uses proprietary nvidia drivers and two seperate X screens, one for the LCD, one for the Samsung TV over HDMI (XBMC that is). This works just fine in KDE4, Gnome2 and anything else I've tried. But Gnome3 just blatantly fails to start with this setup. Last time I tried, it was Gnome 3.0.0 or something, but meanwhile there is Gnome 3.2.2 and still they didn't manage or refused to fix this issue.

Well, I'm not alone:

Convert from VirtualBox to KVM/Qemu

Konverting from VirtualBox to KVM is actually quite easy.

If you use snapshots in VirtualBox, then you will first have to clone the current running state into a new VM (Right clickt -> Clone -> blah -> select only current state)

Then, if you use dynamic growing disks, convert them to raw format

VBoxManage clonehd --format RAW Win7.vdi Win7.raw

Now convert it to qcow2

SOHO Mailserver with Postfix + Postgresql + Dovecot + SpamAssassin + Roundcube

This HowTo describes my Home-Mailserver Setup. Basically this is a sum-it-all-up article from various resources on the net. 

Used Software:

  • Arch Linux OS
  • Postfix MTA
  • PostgreSQL database backend
  • Dovecot IMAP Server
  • Roundcube Webmail + Apache Webserver
  • Spamassassin junk filter
  • Server-side filtering with Sieve
  • fetchmail (for pulling all spread accounts in this one place)

Preconditions in my setup:

Project T5220, try 1: How NOT to configure a T5220 as a complete Oracle/Weblogic development environment

Currently I have to configure a Sun Enterprise T5220 as our new "developemnt environment", replacing our V440 (Oracle) and the T1000 (Weblogic). We chose a Sun CMT machine as we wanted to stay close to production in regards of architecture (processor type/OS etc).

The machine will have to run an Oracle instance, and some containers for the Weblogic environments (we have an integration env, daily build env + some development environments for projects). The new T5220 ist packed with a 1.4GHz T2 Niagara, 64GB of memory, 2x146GB for the OSes, and 6x300GB for the database and NFS.