If you tried to add node to your etcd cluster and it failed, your cluster may have lost quorum and will not start again. To recover it you need to create new cluster identity. This is a short howto. Continue reading How to recover containerized etcd in Openshift cluster
Category Archives: Linux
LEDE: added support for Kimax U25AWF-H1
Cron jobs in OpenShift
If you need to periodically run some job in OpenShift you have several options. Continue reading Cron jobs in OpenShift
$2 USB crypto token for use with GPG and SSH
If you are interrested in security devices this post may be for you. Recently I’ve found a software which makes a GPG security device out of a STM32. It’s called Gnuk. You just need a compatible board, programmer, flash the firmware and you are ready to go. I was just hoping to find some cheap device to flash to play with it.
Continue reading $2 USB crypto token for use with GPG and SSH
OrangePI: H264 HW encoding with ffmpeg
Multicast over “stupid” networks
IP multicast is an interesting technology. It’s main purpose is to
save network bandwidth as much as possible – traffic is sent to hosts
which asked for it only (as opposed to broadcast). On the other
hand, you need smarter (manageable) switches and specific
non-trivial configuration on both routers and switches. Even more
complicated it is when you try to make it work over VPN. Continue reading Multicast over “stupid” networks
Primitive webcam server using inetd and fswebcam
Hi all!
This weekend I was thinking how to make my webcam connected to
OrangePI send a picture “on demand”. There are daemons (e.g. motion or
webcam-mjpg) which do this but they capture images even when you are not
watching and I wanted to avoid this. There are also projects (fswebcam)
which are able to take single picture, save it to disk and end. I just
needed to run it after http request and send back the image. Installing
full webserver with some kind of interpreter (php, lua,…) seemed to me
like an overkill. So I came to an idea to use inetd.
And this is how I did.
Continue reading Primitive webcam server using inetd and fswebcam
Yet another IoT thermostat
Hi all,
this post will be about my homemade IoT thermostat. 
The goal was to not install any cables (because I live in a rented flat), to go really cheap and to be able to set the temperature from anywhere. I’ll also give you some tips you should think about when building your own. Let’s get started.
OrangePi: Installing OpenELEC chroot into Armbian (Updated 15. Jul 2017)
Hi all,
since I found, that Debian chroot on OpenELEC is not the best solution, I tried to do it vice-versa. This is what I needed to do.
Continue reading OrangePi: Installing OpenELEC chroot into Armbian (Updated 15. Jul 2017)
OrangePi: Installing Debian chroot into OpenELEC
Hi all,
I have an OrangePi running jernej’s OpenELEC build connected to my TV. It works very well and stable, but on the other side, you can’t do much more with it because OE is very limited Linux distribution. This is a short guide how to run standard Debian services (nginx, samba, openvpn, … anything) in Debian chroot. Continue reading OrangePi: Installing Debian chroot into OpenELEC