Month: October 2019

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I had setup Pi-hole, a remote one, DNScrypt, both local and remote, privoxy for cleaning up the bad web traffic that passes through pi-hole etc. Things were looking good and that’s when EFF came up with their new https://panopticlick.eff.org/

After all the effort, the Panopticlick reports are not shining with colors. This gives and idea about the extend to which tracking is prevalent.

The funny part is, this is what you you get with all the circus !!

Useful links & screen shots:

https://github.com/pi-hole/pi-hole/wiki/DNSCrypt-2.0

https://github.com/pi-hole/pi-hole/wiki/DNSCrypt-2.0

https://itchy.nl/raspberry-pi-3-with-openvpn-pihole-dnscrypt

root@ubuntu-s-1vcpu-1gb-xyz-01:~# apt install dnscrypt-proxy

no privacy – as logs are there !

General DNS pointing to one location
randomized !

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I was looking at the possibility of staying at an Himalayan Village for a while and working. Interestingly, I stumbled up a training firm called Alt-Campus : https://altcampus.io/

Clockwise from top: Skyline of Dharamsala, Main Street Temple – McLeod Ganj, Gyuto Karmapa, Himachal Pradesh Cricket Association Stadium and St. John church
(Image from https://commons.wikimedia.org/wiki/File:Dharamsala_Montage.png)

Yes, the cool thing is that they have setup this up in Dharmasala!

They seem to have an hands on training which could be useful. The payments are only after one get placed and that sounds pretty cool thing to do as well.

I will post more details, if I find anything new …. !

Featured image from : https://en.wikipedia.org/wiki/Dharamshala#/media/File:Cloudy_Triund,_above_Mcleod_Ganj,_Himachal_Pradesh.jpg

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As someone from a C++ – Java – UNIX background Javascript on the server side was always a peculiar thing for me. For the current application https://streamersedge.com/ dApp combining blockchain, video streaming, games NodeJS has become a very important tool chain.

For the performance, a questionnaire of the sort is prepared. Publishing it here as I would like to save them and also get some critics from the experts.

The eventual plan is to use Prometheus, Grafite, Grafana stack for Metrics and ELK (ElasticSearch, Logstack, KibanaO for log aggregation. We are also experimenting with some APMs like Newrelic in the meantime.

NodeJS VM Garbage collection
  1. What is the GC (garbage collection) parameters we have ?
  2. How heap size/RAM is available for the NodeJS process ?
  3. Are we using all the CPUs available on a given server or instance ?
  4. What are the sysctl and process security limits for the NodeJS processes in a given server/instance ?
  5. Have we optimized the network connections to the servers to support maximum connections ?
  6. For given CPU and RAM, say, 1 Ghz and 1 GB RAM, roughly how many concurrent connections we can support ?
  7. Are we running I/O bound NodeJS processes ? (This is when DevOps will show your BPF super powers ? :slightly_smiling_face: )
  8. OpenTracing – Can we use Grafana – ELK to map the CPU spikes ?
  9. Newrelic / Dynatrace or an Open Source solution for APM ?