satishchennu1

Jaeger Monitoring for tracing 

a) https://itnext.io/when-istio-meets-jaeger-an-example-of-end-to-end-distributed-tracing-2c136eb335eb
b) https://medium.com/swlh/microservices-observability-with-distributed-tracing-32ae467bb72a
c) https://developers.redhat.com/blog/2017/07/10/using-opentracing-with-jaeger-to-collect-application-metrics-in-kubernetes/

satishchennu1

Tips to pass Certified Kubernetes Application Developer (CKAD) exam

Getting started Kubernetes :- 
  a) Book : Kubernetes: Up & Running 
  b) Practice practice & practice with CKAD Exercises 
          the Best Kubernetes CKAD sample exercises which cover all parts of the exam https://github.com/dgkanatsios/CKAD-exercises.
  c) Again, the best practice is use kubectl command well. Use kubectl to create resources (such as deployment, service, cronjobs, secret, configmap…) instead of creating them from manifest files. 
     Incase you have to edit manifest, use dry-run and -o yamlto save yaml file then edit manifest files.
   d) Kubernetes in Action by Mario Luksa. The book is the holy bible of Kubernetes, and it basically answer all questions you may have ;
   e) Whether or not you use Kubernetes at work, you should still provision your own cluster somewhere and play with it. 

satishchennu1

Move to home folder and create a new folder for maven artifacts:
cd ~ && mkdir installed-packages
Go to https://maven.apache.org/download.cgi and wget the latest artifact:
If you don't have wget installed: sudo yum install -y wget
cd ~/installed-packages
wget http://mirror.olnevhost.net/pub/apache/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
Uncompress the downloaded file:
tar -xvf apache-maven-3.6.3-bin.tar.gz
Create a symbolic link of the uncompressed file:
ln -s ~/installed-packages/apache-maven-3.6.3 /usr/local/apache-maven

satishchennu1

Ansible Documentation : 

1. https://blog.ssdnodes.com/blog/step-by-step-ansible-guide/
2. https://www.devopsroles.com/ansible-playbook-nginx-php/
3. https://www.digitalocean.com/community/tutorials/how-to-use-ansible-roles-to-abstract-your-infrastructure-environment
4. https://medium.com/@OpcitoTechnologies/how-to-write-ansible-roles-and-publish-them-on-ansible-galaxy-e750cd457619
5. Ansible for the Absolute Beginner - Hands-On - DevOps 
6. Ansible + Openshift  --> https://www.ansible.com/resources/videos/ansible-openshift-application-deployment-into-container-platform
7. Best ansible video --> https://www.ansible.com/resources/webinars-training/introduction-to-ansible
8. Good Books for ansible 

satishchennu1

1. oc get clusterversion 
2. review the current update channel information and confirm that your channel is set to stable-4.2:
      oc get clusterversion -o json|jq ".items[0].spec"

      {
        "channel": "stable-4.2",
        "clusterID": "990f7ab8-109b-4c95-8480-2bd1deec55ff",
        "upstream": "https://api.openshift.com/api/upgrades_info/v1/graph"
      }
3.View the available updates and note the version number of the update that you want to apply

satishchennu1

https://redhat-developer-demos.github.io/knative-tutorial/knative-tutorial-basics/0.7.x/04-scaling.html#scaling-scale-to-zero
https://blog.openshift.com/knative-serving-your-serverless-services/?extIdCarryOver=true&sc_cid=701f2000001OH7TAAW
https://codelabs.developers.google.com/codelabs/knative-intro/index.html?index=..%2F..index#13
https://github.com/nikhilbarthwal/knative
https://learning.oreilly.com/library/view/knative-cookbook/9781492061182/ch07.html


knative deployment 

a) we will deploy our first application on the Knative framework 

satishchennu1

Program 1 – Write a Ansible Adhoc Commands to create a group called “deploy
            How to verify?
            $ more /etc/group | grep deploy
Program 2 - Write a Ansible Adhoc Commands to create a user called “deploy-user” which is part of group called “deploy” and with /bin/bash shell.
            How to verify?
            $ more /etc/passwd | grep deploy-user
Program 3 – Write a Ansible Adhoc commands install package named “httpd” in RHEL/centos.
            How to verify?
            $ which httpd
program 4 - Program 4 – Write a Ansible Adhoc commands to start and enable the service named “httpd”

satishchennu1

I am trying to install gremlin on my openshift using kubernates environment . 
Was able to do both the steps 

Step 1:  Downloading your Gremlin client certificates

                                a) Navigate to Team Settings and click on your Team. Click the blue Download button to save your certificates to your local computer
                                
step 2:  Set up your Gremlin credentials

                                gremlin account (sign up here) you will need to get your Gremlin Daemon credentials. Login to the Gremlin App using your Company name and sign-on credentials