A collection of Jupyter notebooks for learning Python from the ground up. - aceking007/Byte-Sized-Code
In this tutorial, we'll learn the best pytest features and plugins to speed up your development process. They're very simple and you can start using them right away. Table of Contents How to Stop a Test Session on the First Failure How to Re-Run Onl...
Perform simple and scalable automation tests with python and pytest. Learn how to run your Automation test script in with pytest in this Selenium Python.
This tutorial presents Ansible step-by-step. You'll need to have a (virtual or physical) machine to act as an Ansible node. A Vagrant environment is provided for going through this tutorial.
Ansible is a configuration management software that lets you control and configure nodes from another machine. What makes it different from other management software is that Ansible uses (potentially existing) SSH infrastructure, while others (Chef, Puppet, ...) need a specific PKI infrastructure to be set up.
Ansible also emphasizes push mode, where configuration is pushed from a master machine (a master machine is only a machine where you can SSH to nodes from) to nodes, while most other CM typically do it the other way around (nodes pull their config at times from a master machine).
This mode is really interesting since you do not need to have a 'publicly' accessible 'master' to be able to configure remote nodes: it's the nodes that need to be accessible (we'll see later that 'hidden' nodes can pull their configuration too!), and most of the time they are.
This tutorial has been tested with Ansible 2.7.1.
Upgrading kubeadm clusters
This page explains how to upgrade a Kubernetes cluster created with kubeadm from version 1.18.x to version 1.19.x, and from version 1.19.x to 1.19.y (where y > x).
To see information about upgrading clusters created using older versions of kubeadm, please refer to following pages instead:
This doc is about cluster troubleshooting; we assume you have already ruled out your application as the root cause of the problem you are experiencing. See the application troubleshooting guide for tips on application debugging. You may also visit troubleshooting document for more information.
A minimal Ingress resource example
Limit access to the nginx service
To limit the access to the nginx service so that only Pods with the label access: true can query it, create a NetworkPolicy object as follows:
If you want to control traffic flow at the IP address or port level (OSI layer 3 or 4), then you might consider using Kubernetes NetworkPolicies for particular applications in your cluster. NetworkPolicies are an application-centric construct which allow you to specify how a pod is allowed to communicate with various network "entities" (we use the word "entity" here to avoid overloading the more common terms such as "endpoints" and "services", which have specific Kubernetes connotations) over the network
Claims As Volumes
Pods access storage by using the claim as a volume. Claims must exist in the same namespace as the Pod using the claim. The cluster finds the claim in the Pod's namespace and uses it to get the PersistentVolume backing the claim. The volume is then mounted to the host and into the Pod.
PersistentVolumeClaims
Each PVC contains a spec and status, which is the specification and status of the claim. The name of a PersistentVolumeClaim object must be a valid DNS subdomain name.
Persistent Volumes
Each PV contains a spec and status, which is the specification and status of the volume. The name of a PersistentVolume object must be a valid DNS subdomain name.
Following table gives the URLs of all the vulnerable web applications, operating system installations, old software and war games [hacking] sites. The URLs for individual applications that are part of other collection entities were not given as it is not necessary to download each of them and manually configure them if they are already available in a configured state. For technologies used in each web application, please refer to the mindmap above.