Socially distanced voices of reason

Went through two milestones this weekend. Did my 4000th kilometer this yeat on my bike today. Was a week with three 100km-rides, this accelerated things a little bit. I moved...

Solaris 11.4 and user_reserve_hint_pct

A long time ago, i wrote about the /etc/system-parameter user_reserve_hint_pct. It limits the size of the ZFS ARC cache by proxy by essentially limiting the amount of the memory the...

Homebridge and Tasmota at my cellar

And Darmok and jalad at Tanagra. As i integrated them into Homekit via Homebridge, i had the problem with the Delock sockets with their custom firmware that i couldn’t switch...

vHBA and AIO

In Oracle Solaris 11.4 SRU30 there was an important change with LDOMS you should be aware of as you probably have to do an administrative step to get best performance....

Piped sandboxes

I got one question via Twitter: “What if there were a convenient way to run typical Unix commands in a sandbox? E.g. grep, awk, sed, etc. Could they work as...

Monitoring the sky - dump1090 to InfluxDB

You may know that i’m very interested in aviation, despite the fact that i had a quite severe case of “being totally afraid of flying” in the past. Or perhaps...

Nested netgroups for fun and profit

Imagine you have several hundred systems to manage. The systems are for separate projects and each project has different teams of admins and only assigned admins should be able to...

Setting up LDAP for Solaris 11

Some time ago i was asked to provide a walktrough for the configuration of LDAP in Solaris 11. It’s a walkthrough how to set up LDAP name services for Solaris...

Telegrafing data to MQTT

On Friday i wrote an article describing how i configured Telegraf to gather monitoring data from my Technische Alternative CMI. In this article i wrote that this substituted a python...

Out of ID

Recently a customer observed on one of their systems, that the number n of databases started quite nicely on a system. However when they tried to start database n+1 on...

Virtualbox via IPS .p5p

Darren Moffat just pointed to this in his Twitter feed about an package for Solaris that would make installation of this great tool really comfortable. VirtualBox now being packaged in...

Using the Technische Alternative CMI with Telegraf

My heating system is controlled by an UVR1611 from Technische Alternative as i have to control a wood pellets heater and solar thermal collectors on the roof in a rather...

IPMP and additional IP addresses

Recently i had a customer with a problem: The customer configured an IPMP group with a number of additional IPs. They had a number of application servers running on the...

Common Criteria certification for Oracle Solaris 11.4

Darren Moffat just wrote in the Solaris blog on blog.oracle.com about an important news for Oracle Solaris 11.4: Solaris just got its Common Criteria cerfication based on the Protection Profile...

Integrating Youless energy monitoring devices into Telegraf

I’m playing a lot with Telegraf in recent time in order to get a handle on monitoring an Exadata or the Oracle DB with it. As I don’t have an...

Channel 26

The house i’m living is quite strange in regard of WLAN reception. It’s a house for four families i’m owning. It’s with four floors (including cellar and roof) and that...

Migration completed

This weekend i converted my old blog c0t0d0s0.org and blog.moellenkamp.org into a Jekyll based version. The nice thing about Jekyll is that you create a fully static version of your...

A new foundation

I’ve decided to bring something back. 10 Years ago i stopped blogging at a freqent schedule out of reasons. But still the content of that period is frequently accessed, as...

Configuring SNMP traps for SMF services

Often there is already some infrastructure to collect notifications about your systems based on SNMP traps. It’s quite easy to enable SMF to send SNMP traps when a service transitions...

Creating Solaris 11 VMs with Vagrant

Currently i’m working on updating the Solaris Cheatsheet to 11.4. As i’m testing the entries with each update, i need a lot of VMs created and destroyed. So the idea...