Krzysztof
Front-end
Service-worker and static content authorization
Many web applications display various content in the browser. Many of these are only available to logged users or those with a specific role. Often API is secured by JSESSIONID or JWT cookie. While in the first case there is no problem with using the browser, in the case of JWT there is one problem. What is it?
Marcin
Back-end
ELK Stack configuration using Ansible
We often receive information from a client that there was an error with the http 500 code on an application. The tester quickly creates a scenario to reproduce the error and another problem arises. Behind a nice frontend there are a dozen or so applications installed on different servers. The error information is undoubtedly in the log - just in which one? You can spend days trying to find the right file on the right server, or you can use a toolkit that allows you to aggregate logs.
Marcin
Back-end
Environment Virtualization using KVM
Virtualizing your environment allows you to work with IT systems quickly and securely. However, not every application can be containerized and packaged in a Docker container - this is where KVM comes to the rescue. KVM, or Kernel-based Virtual Machine, is an environment on which it is possible to run a virtual machine. The association with VirtualBox is most accurate - the idea is exactly the same. There are, of course, more technologies allowing to create virtual environments - such as VMware or Hyper-V.
Kosma
Back-end
How to build Electronic Registered Delivery System
Can you have the confidence, proof of delivery and reliability of a traditional registered letter, and the convenience and speed of an email? Now, you can.
Which Objects in Kubernetes
For a beginner Kubernetes (k8s) user the variety of objects that you should be aware of can be overwhelming a little bit. In this article I would like to give you an overview of pod controllers object.
Kubernetes Security
Security in your infrastructure should be considered as a key thing. According to type of your business, your requirements can be more or less tightened, but you always should keep an eye on it.
Monitoring in Kubernetes
Going towards microservice architecture, you should be aware of complexity that it brings. Multiplication of replicas causes your infrastructure harder to monitor and maintain. You are simply not capable of keep an eye of each service by yourself. Additionally Kubernetes (k8s) infrastructure by itself must be monitored.
How to provision your Kubernetes Cluster?
There are many tools that can help you with your cluster provisioning / setup.
Why exposing Services in Kubernetes (k8s)
While working with Kubernetes, sooner or later you will need to call one application from the another. It’s obvious that we need a part of infrastructure which act as a Load Balancer and for the outside call we need also reverse proxy component. And this is where k8s Service and Ingress Controller come into play.
