AWS
Quick guide on aws for beginners Understanding network concepts in aws How to achieve CI/CD in aws CI/CD in aws managed resources with Jenkins Push Image to aws ECR Using GitHub Actions Setup an EventBridge Rule in aws How ECS & ECR works in aws EKS with Fargate Profile Launch EKS using eksctl in aws Container insight for EKS-Fargate in cloudwatch Deploy aws resources with CloudFormation AWS secrets scanning by GitHub Setup Site to Site VPN Connection in AWS
AZURE
Gateways in Azure Understanding network concepts in Azure Ingress in Azure Kubernetes Service
GCP
Architecting hybrid infrastructure with Anthos

ANSIBLE
Ansible a configuration management tool Runbook Automation tool for playbooks
DOCKER
Docker a containerization Tool Networking in Docker Multi-stage build in Docker what is docker-compose All about Docker swarm
GIT
CLI instruction to work with Git Integrating Jenkins with GitHub Secret detection in GitLab Push Image to ECR Using GitHub Actions
JENKINS
Jenkins a continuous integration tool Acheive CI/CD using Jenkins in AWS Configuring weblogic deployer plugin in Jenkins
KUBERNETES
Kubernetes an orchestration framework Launch kubernetes cluster in Different ways Debugging your kubernetes cluster Certificates renewal of kubernetes cluster Deploying application on Kubernetes cluster api versions to use in manifest file RBACs in Kubernetes Health check of containers in Kubernetes Rancher a cluster management platform Understanding ISTIO as a service mesh
TERRAFORM
Deploying IaC using Terraform Terraform module EKS cluster using Terraform

APACHE
Things to know in Apache How to Configure Apache-httpd Server Setup httpd as os-service on OL8 SiteMinder and its Integration with WebServer Apache SSL Installation Instructions NO_RESOURCES Errors in APACHE with WLS
WEBLOGIC
Installing WebLogic 12.1.3 without GUI WebLogic Server as a managed Azure service WLS domain extension to include JRF template All about OPatch in WLS How to define WorkManager in Weblogic Some known Weblogic exceptions Different OutOfMemory issues Some known Weblogic exceptions Play with WLST Persistent store in WLS Configuration of NodeManager

JAVA
JAVA_OPTIONS Study on JAVA_HEAP Native OOM in Java Heap Types of Threads Various Java-options to use in Java apps How to run Java Flight Recorder dbping a java-weblogic utility
SSL
When & why to use SSL certificates SSLv3 to TLS1.* SHA2 on Oracle https Server Weblogic SSL Renewal Steps
CHEATSHEETs
Linux Cheatsheet Linux Log parsing cheetsheet SSL Cheatsheet MySQL Cheatsheet PostgreSQL Cheatsheet WebLogic Cheatsheet Python Cheatsheet Kubernetes Cheatsheet Terraform Cheatsheet Hashicorp-vault Cheatsheet GCP Cheatsheet
OTHER
All about Messaging Queue small guide on Python WLSDM monitoring agent in WLS Register driver for MSSqlServer Understanding YAML Understanding Role of an API Gateway SonarQube code analysis

16 March 2020

RANCHER - A cluster management platform

Rancher is a 100% free and open-source software platform that enables the enterprise to run containers in production. It is a complete software stack for teams adopting containers. It has the capability that it can import your k8s-cluster no matter from where it comes from. It is a single cluster-multi tenancy tool. It addresses the operational and security challenges of managing multiple k8s-clusters across any infrastructure while providing DevOps teams with integrated tools for running containerized workloads.
Resources like Istio, pipeline, Prometheus, Grafana are integrated with Rancher.

 
 Getting start with Rancher using Docker
 $ docker pull rancher/rancher
 $ docker run -d --restart=unless-stopped -p 61090:80 -p 61091:443 \
  -v /software/bea/rancher:/var/lib/rancher --privileged rancher/rancher:latest

access the Rancher console by hitting - https:localhost:61091/ 

follow the welcome instructions on the screen and it will land up to your Global screen of clusters.
once your setup is complete, start adding any of your k8s-cluster.

in this example, I am going to add my vanilla k8s-cluster which is running on-prem.

navigate to Add-cluster > other cluster > give a name to your cluster 
rancher will generate commands for you to import your cluster, which you need to run in your cluster CLI as below

which will deploy required resources

$ kubectl create clusterrolebinding cluster-admin-binding \
  --clusterrole cluster-admin --user [USER_ACCOUNT]
$ kubectl apply -f https://localhost:61091/v3/import/s8dkk7demo6fp2f6qffhmlkr.yaml

# if you get a certificate related error try running on insecure channel
$ curl --insecure -sfL https://localhost:61091/v3/import/s8dkk7demo6fp2f6qffhmlkr.yaml | \
  kubectl apply -f 

# following resources will gets created
 clusterrole.rbac.authorization.k8s.io/proxy-clusterrole-kubeapiserver created
 clusterrolebinding.rbac.authorization.k8s.io/proxy-role-binding-kubernetes-master created
 namespace/cattle-system created
 serviceaccount/cattle created
 clusterrolebinding.rbac.authorization.k8s.io/cattle-admin-binding created
 secret/cattle-credentials-4c43de3 created
 clusterrole.rbac.authorization.k8s.io/cattle-admin created
 deployment.apps/cattle-cluster-agent created


you will be able to see your cluster added into rancher now
keep reading.. lot more to come...

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