Docker: why one process per container does not always work
My “permanent” SSL certificates are expiring soon, so I decided to switch to letsecnrypt. The easiest way to obtain their certificate is allegedly to use Certbot. There is a nice […]
Hacker’s diary
File permissions on Docker volumes
When a host directory is mounted into a docker container, how are file permissions handled? Docker copies files permissions from the host to the container verbatim, inluding numeric user ids. […]
A funny story about Mac hardware
I have a MacBook Pro now, courtesy of my new employer, but it only has four USB-C ports and nothing else, so none of my existing hardware could connect to […]
Swimming in the DigitalOcean
I have moved my blog to DigitalOcean platform: they provide a decent virtual server for $5/month, with static IP address to boot. It’s all highly scientific now: I have moved […]
Getting mail to work with GMail in Docker
I am moving my web site to docker, and I need to be able to send emails using a GMail account. GMail is limited to 500 emails a day, but […]
How to prevent docker container from exiting
A docker containing not running anything particular in the foreground will exit immediately after start. Specifying /bin/sh as the startup command does not help. Some Internet sources suggest tail -f […]
Why confirming credit card purchases with SMS is a bad idea
During my trip abroad, I tried to use my credit card to make an online purchase, but the payment did not go through, it required a verification code sent to […]
Pushing data stream to web socket in ASP.NET [Core]
![Pushing data stream to web socket in ASP.NET [Core]](https://ikriv.com/blog/wp-content/uploads/2020/02/WebSocketDemo.png)
Web sockets were invented to push data from web server to clients. So, one would expect that sending data to a web socket would look something like this: void OnNewDataReady(string […]
Beware of the evil Paint
I noticed that whenever I pressed arrow keys on the keyboard, my mouse cursor moves in funny ways. This felt quite creepy, as if some software was trying to intercept […]
The evolution of nothing
In the beginning, Brian and Dennis created C, and C had the void keyword, and Brian and Dennis saw that this is good. It all went downhill from there. In […]