CKA / CKAD Practice Exam Simulator

the original repos(only support CKA )

• arush-sal/cka-practice-environment , it's awesome! but hard to use it. only support visit the CKA practice environment with URL http://localhost or http://127.0.0.1, that's TOO BAD, cause this constraint, you can only use MacBook or CentOS/Ubuntu Desktop verison, if you wanna use a VM on a Cloud, and visit the environment from your local browser, there is no way for you.

• satomic/cka-practice-environment fixed it, you can provision the CKA practice environment on a Cloud VM, than visit it with its PUBLIC IP from your local browser, that's cool, BUT you have only CKA option not CKAD too, i want to have both options in single platform.

With my repo, i support both CKA & CKAD in same browser and more features.

• With my repo nsvijay04b1/cka-ckad-exam-simulator, i want to make the test available for both CKA & CKAD. From any browser with http://<PUBLIC_IP>, you can select the test CKA or CKAD and start the test, CKA test timer is 3hrs and CKAD test timer is 2 hrs.

• questions folder is a volume mount , in case you want to attempt different set of questions, replace all questions from 1.html to 24.html for CKA( 1.html to 19.html for CKAD) in fodlers ckadquestions & ckaquestions and then you have new test runtime go for it.

      volumes:
      - /users/kube/LAB/cka-lab/ckaquestions:/etc/nginx/html/ckaquestions:rw 
      - /users/kube/LAB/cka-lab/ckadquestions:/etc/nginx/html/ckadquestions:rw
  

• you have the option to tag the image you build ( image in file docker-compose-builder.yaml )

   gatone:
    build: ./gateone
    image: cka-ckad-exam-gateone:latest
   lab:
    build: ./lab
    image: cka-ckad-exam-lab:latest
  

• you have the option to chose the DNS settings which will be updated in containers as /etc/resolv.conf ( update dns_search and dns in file docker-compose-builder.yaml )

     dns_search:
     - corp.example.com
     - example.com
     dns:
     - 10.100.102.1
     - 10.100.102.2
  

• file docker-compose-builder.yaml

version: "3"

services:

  gateone:
    build: ./gateone
    image: cka-ckad-exam-gateone:latest
    ports:
    - "9080:8000"
    hostname: kubectl
    networks:
    - frontend
    volumes:
    - ssh_key:/root/.ssh/
    - /users/kube/.kube/:/root/.kube/
    dns_search:
    - corp.example.com
    - example.com
    dns:
    - 10.100.102.1
    - 10.100.102.2

  lab:
    build: ./lab
    image: cka-ckad-exam-lab:latest
    entrypoint: /opt/entry.bash
    ports:
    - "80:80"
    hostname: exam
    networks:
    - frontend
    volumes:
    - /users/kube/LAB/cka-lab/ckaquestions:/etc/nginx/html/ckaquestions:rw 
    - /users/kube/LAB/cka-lab/ckadquestions:/etc/nginx/html/ckadquestions:rw  
    environment:
      GATEONE_HTTP_SERVER: "gateone:8000"
    dns_search:
    - corp.example.com
    - example.com
    dns:
    - 10.232.217.1
    - 10.232.217.2

networks:
  frontend: {}
volumes:
  ssh_key: {}

Step by step adoption

you must install docker before do this. just copy and paste these shells from the two steps, then visit it from your local browser

Step 1: Install docker-compose

Make sure that you have docker-compose installed(installation instructions). Or you can run the install-docker-compose.sh shell scripts.

sh install-docker-compose.sh

# install docker-compose 
wget https://www.cnrancher.com/download/compose/v1.23.2-docker-compose-Linux-x86_64
mv v1.23.2-docker-compose-Linux-x86_64 docker-compose
chmod +x docker-compose
mv docker-compose /usr/local/bin/
docker-compose -v

Step 2: Git clone repo

git clone https://github.com/nsvijay04b1/cka-ckad-exam-simulator.git 

Step 3: update docker-compose-builder.yaml

• volumes of gateone service

  • Replace /users/kube/.kube/ with path of KUBECONFIG file of your k8s cluster.

• volumes of lab service

  • Replace /users/kube/LAB/cka-lab with path of ckad/cka questions folder of yours.
  • All questions are names like 1.html till 24.html for CKA and 1.html till 19.html and copied to respective folders ckaquestions and ckaquestions at path you would replace /users/kube/LAB/cka-lab with.

services:
  gateone:
    volumes:
    - ssh_key:/root/.ssh/
    - /users/kube/.kube/:/root/.kube/
  lab:
    volumes:
    - /users/kube/LAB/cka-lab/ckaquestions:/etc/nginx/html/ckaquestions:rw 
    - /users/kube/LAB/cka-lab/ckadquestions:/etc/nginx/html/ckadquestions:rw 

• Update DNS values ( refer /etc/resolv.conf of you machine)

  • nameserver in /etc/resolv.conf should go to dns
  • search in /etc/resolv.conf should go to dns_search

   dns_search:
   - corp.example.com
   - example.com
   dns:
   - 10.232.217.1
   - 10.232.217.2
  

Step 4: run docker-compose build

• Run docker-compose

docker-compose -f docker-compose-builder.yaml up -d --build

• docker images that are build

cka-ckad-exam-lab                                                latest              249d378ed8cf        2 hours ago         182MB
cka-ckad-exam-gateone                                            latest              f86157a11b2a        2 hours ago         1.16GB

• docker containers running

[kube@eaasrt cka-ckad-exam-simulator]$ docker ps | grep cka
aa7d3b03f8e9        cka-ckad-exam-gateone:latest                 "gateone --log_file_…"   2 hours ago         Up 2 hours          0.0.0.0:9080->8000/tcp                         cka-lab_gateone_1
1dc478bda507        cka-ckad-exam-lab:latest                     "/opt/entry.bash"        2 hours ago         Up 2 hours          0.0.0.0:80->80/tcp                             cka-lab_lab_1

Step 5: Accessing the application

In the bowser launch the application with http://<HOSTNAME> or http://<IP> , where HOSTNAME/IP is from where docker-compose is run.

Creation of kubernetes cluster in case you didnt had one

if you already have Kubernetes Cluster, just copy your kubeconfig.yaml file contents to the /users/kube/.kube/config file in the host for his CKA Practice Environment.

# maybe some command like
cp /pathto_your_existed/kubeconfig.yaml /users/kube/.kube/config

otherwise you can use Rancher k3s to provision a mini Kubernetes to use.

# provision k8s (k3s)
curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="--no-deploy traefik" sh -

# check it
kubectl get node

# copy kubeconfig to /root/.kube/config
cp /etc/rancher/k3s/k3s.yaml /root/.kube/config
sed -i "s/localhost/$(echo $PRIVATE_IP)/g" /root/.kube/config

kubectl --kubeconfig /root/.kube/config get node

Uninstall

docker-compose -f docker-compose-builder.yaml down
/usr/local/bin/k3s-uninstall.sh