Can you explain what is the different between is MTTR and MTTD use in Amazon AWS?

Amazon AWS MTTR (Mean Time to Recovery) and MTTD (Mean Time to Detect) are key metrics used to measure and improve system reliability and incident management. Here's a breakdown of each: 

1. MTTR (Mean Time to Recovery):

   • What it is for: MTTR represents the average time it takes to recover from a system failure or incident. This metric is critical in evaluating the efficiency and speed of your recovery process after something goes wrong.
   • Use in AWS: AWS services and infrastructure are built with high availability, but incidents like configuration issues, downtime, or hardware failures can still occur. MTTR helps DevOps teams understand how quickly they can restore normal operations after an incident.
   • Example: If your EC2 instance crashes, MTTR measures how long it takes to identify the issue, apply a fix, and restore the service to full functionality.

2. MTTD (Mean Time to Detect):

   • What it is for: MTTD measures the average time it takes to detect an issue or incident from the moment it occurs. Identifying how responsive your monitoring systems are in catching problems early is critical.
   • Use in AWS: In AWS, MTTD can be improved by using services like CloudWatch, AWS X-Ray, and GuardDuty, which help detect performance degradation, security threats, or failures in your system. The sooner you detect a problem, the faster you can work on fixing it.
   • Example: MTTD would measure how long your monitoring systems take to detect a spike in error rates in an application hosted on AWS Lambda.

Key Benefits:

• Lower MTTR means quicker recovery from incidents, minimising downtime and reducing impact on end users.
• Lower MTTD means quicker detection, allowing teams to act before incidents escalate into bigger problems.

Both metrics are crucial in assessing and improving the resilience and reliability of your AWS-based infrastructure. 💡

Kubernetes CKA Exam preparation Links

 Here is a link to of links for the material to help me prepare for the Kubernetes Administration Exam.

• https://go-talks.appspot.com/github.com/jecnua/notes-presentations/notes/containers/orchestration/k8s/certifications/00-preparation.article
• https://go-talks.appspot.com/github.com/jecnua/notes-presentations/notes/containers/orchestration/k8s/certifications/01-cka.article
• https://go-talks.appspot.com/github.com/jecnua/notes-presentations/notes/containers/orchestration/k8s/certifications/02-questions.article

• https://cloudacademy.com/learning-paths/certified-kubernetes-administrator-exam-preparation-242/
• https://vmtechie.blog/2019/01/12/how-to-prepare-for-certified-kubernetes-administration-cka-exam/
• https://scriptcrunch.com/kubernetes-exam-guide/

• https://boxboat.com/2018/07/02/kubernetes-nginx-ingress-tls-secrets-all-namespaces/
• https://www.techrepublic.com/article/how-to-deploy-nginx-on-a-kubernetes-cluster/ -

• Kubernetes Docs online docs - https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/
• Kubernetes Change Context -- https://stackoverflow.com/questions/43643463/how-to-switch-kubectl-clusters-between-gcloud-and-minikube

• Kubernetes Cheat Sheet - https://kubernetes.io/docs/reference/kubectl/cheatsheet/ 
• How to Set Up Ingress On Kubernetes Using Nginx Controller - https://devopscube.com/setup-ingress-kubernetes-nginx-controller/
• Deploy Nginx on K8 - https://www.techrepublic.com/article/how-to-deploy-nginx-on-a-kubernetes-cluster/
• Nginx TLS - K8 - https://boxboat.com/2018/07/02/kubernetes-nginx-ingress-tls-secrets-all-namespaces/
• Manchester Exams Centers - https://www.ielts-exam.net/test-center-search/the-united-kingdom/england/manchester

• The Ultimate Guide to Passing the CKA Exam: https://www.contino.io/insights/the-ultimate-guide-to-passing-the-cka-exam
• https://medium.com/platformer-blog/how-i-passed-the-cka-certified-kubernetes-administrator-exam-8943aa24d71d

https://www.componentsoft.io/blog/the-kubernetes-cka-exam-11-tips-for-better-chances/

How to Prepare for Certified Kubernetes Administration (CKA) Exam - https://vmtechie.blog/2019/01/12/how-to-prepare-for-certified-kubernetes-administration-cka-exam/

PASSING CKA IS NOT HARD, BUT PREPARATION IS --- https://thecloudcaptain.com/blog/passing_cka_is_not_hard/

Studying for the Certified Kubernetes Administrator Exam - http://www.kubernet.io/

Azure tutorials with Terraform and Packer and Ansible ..

 Here are some links to be used to build and deploy Packer Image Automated Build, Provisioned with Ansible and Deployed into infrastructure with Terraform. 

Links list; 

- Microsoft Tutorial to Implement as tutorial and publish as Video Tutorial - https://cloudblogs.microsoft.com/opensource/2018/05/23/immutable-infrastructure-azure-vsts-terraform-packer-ansible/  ( This article my have few bugs and incompatibilities as it was done ages ago and the application has since moved into more advanced versions ) 

- Packer YAML and Azure Pipelines - https://www.nielskok.tech/azure-virtual-desktop/packer-yaml-azure-devops-pipeline-pt-1/  

- Here - Creating VM Images with Packer in Microsoft Azure - https://medium.com/slalom-build/azure-packer-592c4dc0e23a  

- This tutorial is more oriented for Amazon AWS  instead of Azure - https://devopscube.com/packer-tutorial-for-beginners/   

- This another tutorial buils Terraform and Packer image build automation for Amazon AWS - https://www.bogotobogo.com/DevOps/Terraform/Terraform-state-tfstate-import.php  

- Another one - https://learn.hashicorp.com/tutorials/terraform/packer  

- https://faun.pub/building-vm-images-on-azure-using-packer-hcl-and-powershell-scripts-45abaaa87e1f  

- https://arsenvlad.medium.com/how-to-create-and-test-azure-service-principal-using-azure-cli-647787cdb526  

- https://blog.devgenius.io/terraform-packer-and-ansible-in-azure-60b1037f8497  

- https://medium.com/search?q=Packer+and+Terraform+  

4 – Videos to be implemented on Jobudo DevTeam Channel – Or create another Playlist on my existent TDLM Channel ..

I was glad to help! If you still have any questions, then be sure to contact us.

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From Silos to Success: How DevOps Transforms Development and Operations

In the rapidly evolving landscape of software development, the term "DevOps" has gained significant prominence.

DevOps, short for combination of work and efforts from Development teams and Operations teams, represents a collaborative and holistic approach to software development and deployment...                

It aims to break down traditional silos between development and IT operations teams, fostering a culture of seamless communication, continuous integration, and rapid delivery. This article provides an introduction to the concept of DevOps, its principles, benefits, and its role in modern software development.

**Understanding DevOps:**

DevOps is a methodology that emphasises the collaboration and cooperation of software development (Dev) and IT operations (Ops) teams throughout the entire software development lifecycle. 

Traditionally, these two functions worked in isolation, leading to communication gaps, slower release cycles, and a lack of accountability in case of issues. DevOps seeks to bridge this gap by promoting shared responsibilities and a more streamlined approach.

**Key Principles of DevOps:**

1. **Collaboration:**DevOps encourages open communication and cooperation between developers, testers, and operations teams. This helps in identifying and addressing potential problems early in the development process.

2. **Automation:** Automation is a core principle of DevOps. By automating tasks like testing, deployment, and infrastructure provisioning, teams can reduce human errors, improve efficiency, and ensure consistent processes.

e.g. Example of DevOps LifeCycle - planning your platform and mapping out what you need to accomplish at each step

3. **Continuous Integration (CI):**CI involves integrating code changes from multiple developers into a shared repository several times a day. This ensures that new code is regularly tested and merged, reducing integration issues and improving software quality.

4. **Continuous Delivery (CD):** CD builds upon CI by automating the deployment process. It allows for the rapid and reliable release of software updates to production environments, minimising manual interventions and reducing deployment risks.

5. **Monitoring and Feedback:**DevOps emphasises real-time monitoring of applications and infrastructure. This helps teams identify performance bottlenecks, security vulnerabilities, and other issues, enabling quick remediation.

e.g - Of DevOps Lifecycle

[ “ While Talking to customers, we found that while automating the continuous delivery pipeline was important, the missing part was enabling the feedback loop,” Monitoring and logging software packages are rapidly converging on the notion of becoming “DevOps hubs” ]

**Benefits of DevOps:**

1. **Faster Time to Market:** DevOps practices enable quicker development cycles and faster release of features or updates, allowing businesses to respond to market demands more effectively.

2. **Improved Collaboration:** DevOps breaks down barriers between teams, fostering better understanding and cooperation, which ultimately leads to improved software quality.

3. **Enhanced Reliability:** Automation and continuous testing ensure that changes are thoroughly tested and consistently deployed, reducing the likelihood of failures in production environments.

4. **Scalability:** DevOps practices, combined with cloud technologies, allow applications to scale seamlessly according to demand.

5. **Higher Quality Software:**Continuous testing and feedback loops lead to higher software quality, as issues are identified and addressed early in the development process.

e.g - Benefits of adopting DevOps 

**Conclusion:**

DevOps represents a paradigm shift in software development, moving away from traditional, siloed approaches towards a collaborative, automated, and customer-focused methodology. By promoting a culture of collaboration, automation, and continuous improvement. 

DevOps has become an essential framework for organisations looking to accelerate their software development lifecycle, enhance software quality, and meet the ever-changing demands of the modern market. Embracing DevOps principles can lead to more efficient, reliable, and successful software development projects.