All posts by Stefan

Arduino powered Bobbycar for my Son

Projects

A project I’m currently working on, is the Arduino powered Bobbycar for my Son.
Because my Son is currently so interested in Switches / Buttons and Lights, I decided to add some on his Bobbycar with future extension possibilities.

I did not want to destroy his new Bobbycar, a gift from his Godmother. So I bought a used one (with trailer) for 20 bucks on ricardo.

BobbyCar

Prototype cabling & programming the RBBB (Also already used in this Project):

Cabling

Prototype Board designed with Fritzing:

fritzing-bobby

img_7075 img_7076

19.11.2016: Put all together.

img_7077

20.11.2016: Drilling, soldering, FINISHED 😉

carinaction

VMware VSAN delete/purge inaccessible objects

Linux

Sometimes it could happen, that you get inaccessible files on your ESXi Cluster with VSAN.
Here are the Steps to clean up inaccessible files with vCenter Server on Windows 2012R2:

Connect to vcenter server with rvc.bat in C:\Program Files\VMware\vCenter Server\rvc

login with administrator@vsphere.local@localhost:

C:\Program Files\VMware\vCenter Server\rvc>rvc.bat administrator@vsphere.local@localhost
 password:
 0 /
 1 localhost/
 >

Check command: vsan.check_state “pathToYourCluster”

> vsan.check_state /localhost/myDatacenter/computers/Cluster01/
 2016-07-14 07:34:49 +0200: Step 1: Check for inaccessible VSAN objects
 Detected 1 objects to be inaccessible
 Detected bf9c6a57-9cc3-d20c-ccb3-a0369f89ecac on 192.168.1.4 to be inaccessible

2016-07-14 07:34:50 +0200: Step 2: Check for invalid/inaccessible VMs

2016-07-14 07:34:50 +0200: Step 3: Check for VMs for which VC/hostd/vmx are out
 of sync
 Did not find VMs for which VC/hostd/vmx are out of sync

Delete inaccessible VSWP Objects command:
vsan.purge_inaccessible_vswp_objects /localhost/myDatacenter/computers/Cluster01/

vsan.purge_inaccessible_vswp_objects /localhost/myDatacenter/computers/Cluster01/
 2016-07-14 07:35:00 +0200: Collecting all inaccessible Virtual SAN objects...
 2016-07-14 07:35:00 +0200: Found 1 inaccessbile objects.
 2016-07-14 07:35:00 +0200: Selecting vswp objects from inaccessible objects by c
 hecking their extended attributes...
 2016-07-14 07:35:00 +0200: Found 0 inaccessible vswp objects.

Delete other inaccessible objects:
Connect to ESXi Server and issue the following command, which should show you the related objects:

/usr/lib/vmware/osfs/bin/objtool getAttr --bypassDom -u bf
9c6a57-9cc3-d20c-ccb3-a0369f89ecac -c

Check the output of the related object and make sure you can delete this file.

Delete the file with:

/usr/lib/vmware/osfs/bin/objtool delete -u bf9c6a57-9cc3-d
20c-ccb3-a0369f89ecac -f -v 10

Run check in vSphere Web Client on “Cluster” -> “Monitor” -> “Virtual SAN” -> “Health” -> Click on “Retest”.
Everything should be ok now.

Important FortiGate CLI commands

Network

FortiGate High Availability Cluster CLI commands:

Manage the specified FortiGate unit (X ist the unit number):

execute ha manage X

Set the current ForitGate Unit as master:

diag sys ha set-as-master enable

Get HA Status:

get system ha status

 

FortiGate Session commands:

Get all Sessions:

diag sys session list

Filter Sessions:

diagnose sys session filter

Clear Sessions (only filtered ones or all):

diagnose sys session clear

Clear Filter:

diag sys session filter clear

LetsEncrypt on CentOS 6 – Free SSL certificate for everyone!

IT-Security, Linux, Network, Web

This is a short manual how to use Let’s Encrypt on CentOS 6 with Apache Webserver:

1. Install dependencies:

Download, unzip and install Python:

wget https://www.python.org/ftp/python/2.7.11/Python-2.7.11.tgz
tar -xvpzf Python-2.7.11.tgz
cd Python-2.7.11
./configure
make altinstall

Install Git:

yum install git
git clone https://github.com/letsencrypt/letsencrypt

2. Stop apache:

Continue reading LetsEncrypt on CentOS 6 – Free SSL certificate for everyone! →

3DR Y6 mit Arduino LED’s

Projects

Heute habe ich meinen Multikoper mit LED’s ausgestattet. Der verwendete Chip auf den LED Streifen ist ein LPD8806 für welchen es bereits eine Library für den Arduino gibt.

Als kompakten “Arduino” habe ich mir das RBBB (Really Bare Bones Board) von JeeLabs zusammengelötet und auf dem Kopter montiert.

Damit kann ich nun mit der Arduino-Entwicklungsumgebung jede einzelne LED & Farbe ansteuern.

Hier ein Video vom Ergebnis: