Naganjaneyulu G

PubSub      PubSub, or Publish-Subscribe, is a messaging pattern that allows different parts of a system to communicate without directly talking to each other. Publishers      are entities responsible for sending messages (or events) to a central system, often referred to as a message broker or a topic. These messages contain information about events or updates that other parts of the system might be interested in. Subscribers      on the other hand, are entities that express interest in certain types of messages or events. They register with the message broker to receive notifications whenever a relevant message is published. The key idea behind PubSub is decoupling. Publishers and subscribers are independent of each other and don't need to know about each other's existence. Publishers focus solely on producing messages, while subscribers focus on consuming messages that match their interests. Lab : Set up and Requirements The set up of th...

Python offers various modules that can be incredibly useful for DevOps tasks. Here's an overview of some essential modules: os module Usage: For interacting with the operating system. import os # Get the current working directory print(os.getcwd()) # List files in a directory print(os.listdir('.')) platform module Usage: Provides information about the platform. import platform # Get the machine architecture print(platform.machine()) # Get the OS release version print(platform.release()) subprocess module Usage: Run external commands. import subprocess # Run a shell command subprocess.run(['ls', '-l']) sys module Usage: Access system-specific parameters. import sys # Get command line arguments print(sys.argv) # Get Python version print(sys.version) ...

  Kubernetes (K8s) excels in orchestrating containerized applications, but as projects scale, maintaining control becomes critical. This is where Namespaces and Resource Quotas step in. Let’s explore these concepts with a simple example. Namespaces Act as virtual clusters within a physical Kubernetes cluster. They provide logical separation, allowing you to divide resources and isolate workloads. This is particularly useful when multiple teams or projects share a single Kubernetes cluster. Each team can have their own namespace, preventing conflicts and ensuring resource isolation. Example: Creating a Namespace apiVersion: v1 kind: Namespace metadata: name: my-namespace Apply using : $ kubectl apply -f namespace.yml namespace/my-namespace created $ kubectl get ns NAME STATUS AGE default Active 15d istio-system Active 10d kube-node-lease Active 15d kube-public Active 15d kube-system Active 15d my-namespa...

V ulnerabilities in Docker images can expose your system to potential cyber threats. Tools like Docker Scout, Trivy,.. offer a fast and comprehensive way to scan for these vulnerabilities, ensuring a secure containerized environment. What is a Vulnerability? A vulnerability is a weakness or flaw in software that can be exploited by attackers to compromise a system’s security. In the context of Docker, vulnerabilities can exist within container images, making them potential entry points for cyber threats. Docker Image Vulnerabilities Docker images serve as the building blocks for containers. These images can contain   outdated   or   flawed components   that may pose security risks. Identifying and mitigating these vulnerabilities is crucial for a   secure containerized environment. Image Vulnerability Database:   https://dso.docker.com/explore Here are the top 5 tools to scan Docker images: Docker scout Trivy Clair Anchore Engine Dagda Synk Scan Docker Imag...