CKAD kubernetes developer certification preparation

HOW to prepare CKAD exam as of Sep 2021

1. Mantra to pass CKAD exam

Practice !!!

Practice !!!

Practice !!!

2. Purchase the exam voucher

Exam vouchers are valid for 1 year in general, but always go and verify below links as they may change from time to time. Once you registered you can reschedule exam too if exam schedule is not with in 24 hours. At the time of this writing, CKAD exams voucher regular cost is $375 USD, now and then they give discounts from 10% to 50% also.

https://trainingportal.linuxfoundation.org/learn/course/certified-kubernetes-application-developer-ckad/exam/exam

https://www.cncf.io/certification/ckad/

Once you register exam, make sure you go through this exam handbook at least once. As it clears many of your exam related questions. Like what kind of browser supported (i.e. chrome), what extension to use and also rules and regulations.

https://docs.linuxfoundation.org/tc-docs/certification/lf-candidate-handbook

3.0 Curriculum

Official exam syllabus provided here. Be familiarize with the syllabus and prepare section wise. https://github.com/cncf/curriculum

I kept one week goal for each section to finish. This kind of goals will help you to prepare exam in a planned way.

3.1 Changes from Sep 28^th 2021

Previous version for comparison:

Click to access CKAD_Curriculum_V1.12.0.pdf

Current Curriculum

Click to access CKAD_Curriculum_v1.22.pdf

New items included in changed curriculum are highlighted below. As exam has 19 questions or scenarios to complete in 2 hours, some questions are lengthy enough to take 1 minute to read. Time is challenge for the exam, it can be conquered only by practicing repeatedly until your fingers get muscle memory.

4.0 Make kubernetes.io as your browser home page. And download ckad exam browser favorites.

https://kubernetes.io/docs/home/

More familiar you are with this site, chances of passing exam are high. Think like this, they are allowing you carry this online guide with your exam and allowing to you copy officially and finish the exam (thanks to concept of open book exam, which help students not to memorize, but understand the concept)

ckad exam favorites are in reference section, get used to those favorite url. While practicing for exam try to reach required section quickly and copy the required yaml file quickly.

for you example if you need to create pv (persistant volume), then you need to go to “https://kubernetes.io/docs/concepts/storage/persistent-volumes/#persistent-volumes” and copy that yaml to your exam terminal and modify the yaml file.

5.0 you need a kubernetes environment to practice

5.1 Minikube

Best way to have practice environment is to setup minikube. Refer below my blog for instructions, if you use Linux os, I gave script to setup minikube

Installing Minikube on ubuntu 20.04

Note: for practicing network related modules, you need additional minikube modules

Following script will start minukube with 2 nodes (default it uses 1 node), 4 cores and 16gb. I use this higher configuration as my laptop has 8 core/32gb memory configuration. But 1 node with 1 core and 4 or 8 gb also works well.

5.2 Practice environment provided by Linux foundation

if you purchase exam voucher and register at Linux foundation, you get access to kiler.sh exam simulator. Trust me it’s much tougher than real exam, so if you finis these in time, you can relax and attend exam with full confidence.

https://trainingportal.linuxfoundation.org/learn/course/certified-kubernetes-application-developer-ckad/exam/exam

Same can be accessed from “https://killer.sh/dashboard” CKAD simulator using your linuxfoundation credentials. Does this inclusion of simulator impacted raise in exam price ??? as I remember exam voucher prices used to be around USD300.

https://killer.sh/dashboard

5.3 KodeKloud labs (kodkloud )

Enroll in kodekloud is good idea as it became de facto standard in kubernetes training (it’s not marketing gimmick and I have no association with him. kodekloud became house hold name for those who start learning kubernetes. it gives you virtual environment to practice all you need is internet and browser. Before attending exam you need to finish both lightning labs. Consider this as pre exam qualification. If you unable to do it, better postpone your exam. )

5.4 CKAD-Practice-Questions

You need questions to practice and you get them here.

https://github.com/bbachi/CKAD-Practice-Questions

5.5 Katacoda virtual browser based environments

Katacoda offering some basic scenarios for free. It’s a good start to practice, as they give you solutions too. https://www.katacoda.com/courses/kubernetes

6.0 Exam tips

Following common tips for the exam are:

$alias k=kubectl

(For me I observed it’s already configured in exam terminal, check with k <enter> as soon as you start exam.

Export following two variables, will be very handy from time to time

export do=”--dry-run=client -o yaml”

export d=”--grace-period=0 –force”

When you delete a pod it’s default wait time is 30seconds. This 30 seconds is very precious. So practice to use variable like $d to delete a pod, by referring $d, will delete it immediately and saves you those 30seconds.

$k delete po testpod $d

7.0 Reference

7.1 Bookmarks

kubernetes

container portconfigmap all envconfigmap env variablecronjobenv variable simplejobliveness commandliveness httpreadiness commandresource cpurollout deprolling update yamlresource memorynetwork policynode selectornode affinitypvcpvserviceaccountsecret env variablesecret as all env varsecuritycontext usersecuritycontext capabitiesservice Nodeportservice clusteriptainttolerationvolume emptydirvolume configmapvolume secretvolume hostpathvolume with pvcAssigning Pods to Nodes | KubernetesConnecting Applications with Services | KubernetesKubectl Reference DocsPerform a Rolling Update on a DaemonSet – Kuberneteskubectl Cheat Sheet | KubernetesAssign CPU Resources to Containers and PodsConfigure Liveness, Readiness and Startup Probes | Kubernetesingress 1.18

Practicing Kubernetes Basics Modules

kubernetes.io gives virtual practice environment to practice below 6 scenarios. All you need is browser, you do not need high end pc or laptop.

https://kubernetes.io/docs/tutorials/kubernetes-basics/

Installing Minikube on ubuntu 20.04

Minikube is used to create local kubernetes cluster for practice purpose. If you are practicing for Kubernetes certifications like CKA or CKAD, then this will be your first step to practice.

Refer minikube webpage for more details: https://minikube.sigs.k8s.io/docs/

What you’ll need 

• 2 CPUs or more
• 2GB of free memory
• 20GB of free disk space
• Internet connection
• Container or virtual machine manager, such as: Docker, Hyperkit, Hyper-V, KVM, Parallels, Podman, VirtualBox, or VMWare

https://minikube.sigs.k8s.io/docs/start/

All you need is to run below commands

grep -E --color 'vmx|svm' /proc/cpuinfo
curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64   && chmod +x minikube
sudo mkdir -p /usr/local/bin/ && sudo install minikube /usr/local/bin/
sudo apt install docker.io -y 
sudo usermod -aG docker $USER && newgrp docker
minikube start –driver=docker
minikube status

Do you need Script ? here you go

I made a script which will install minikube and creates a 2 node cluster wit 20gb disk space, 2 cores and 8gb memory.

#!/bin/env bash
#script to install minikube,kubectl and initialize it with 8gb memory, 2 nodes and 20gb disk space
#Reference:https://v1-18.docs.kubernetes.io/docs/tasks/tools/install-minikube/

#Function to check if your pc supports virtualization
check_vrt() {
if grep -E --color 'vmx|svm' /proc/cpuinfo >/dev/null;then
echo "Good news your system supports virtualization"
else 
echo "So sorry :-( virtualization not enabled on your pc, please follow below URL"
echo "https://askubuntu.com/questions/256792/how-do-i-enable-hardware-virtualization-technology-vt-x-for-use-in-virtualbox"
exit 10
fi
}

#Function to install curl
install_curl(){
if curl --version > /dev/null; then
           echo "Congrats curl installed proceeding with minikube installation"
           else 
           echo "curl not installed, installing curl"
           sudo apt install curl -y
        fi
}

#Function to install docker
install_docker() {
sudo apt install docker.io -y
sudo usermod -aG docker $USER && newgrp docker
docker version
}

#Function to install minikube
install_minikube() {
curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 \
  && sudo chmod +x minikube && sudo mkdir -p /usr/local/bin/ && sudo install minikube /usr/local/bin/
}

#Function to initialize minikube
init_minikube() {
minikube start --driver=docker --disk-size=20g --nodes=2 --namespace='myns' --cpus=2 --memory=8g
minikube status
}

#Main Function call all functions
check_vrt
install_curl
install_docker
install_minikube
init_minikube

JSON vs YAML

The following stackoverflow page has intresting comments about json vs yaml.

what-is-the-difference-between-yaml-and-json

JSON:

1. web friendly
2. fast processing compare to YAML
3. wider acceptance
4. lack of comments is major drawback
5. Good for data interchange handling

YAML

1. human eye friendly (no ” {} )
2. good for configuration files
3. super set of json

JSON PATH

free kodekloud course on Json path.

Now a days dealing with REST API bases services gives outputs of json. Knowing this jsonpath queries will be very help full to filter out and get the required outputs.

json-path-quiz

Discloser: no association or affiliation with kodekloud, just happen to see this course and did over weekend, sharing here as it might be useful for others. If you see other good courses on this topic, feel free recommends or provide the details.

User case senarios:

1. If you are kubernets admin,then this will be very useful.
2. if you are managing huge resources in any cloud environments and working on their CLI tools like azure cli, then this will be very useful to generate quick details about the cloud footprint.
3. Hadoop services support rest api and provide json output, this query will be helpful to list required outputs.

For practice you can use :

https://jsonpath.com

JSONPath	Description
$	the root object/element
@	the current object/element
. or []	child operator
..	recursive descent. JSONPath borrows this syntax from E4X.
*	wildcard. All objects/elements regardless their names.
[]	subscript operator. XPath uses it to iterate over element collections and for predicates. In Javascript and JSON it is the native array operator.
[,]	Union operator in XPath results in a combination of node sets. JSONPath allows alternate names or array indices as a set.
[start:end:step]	array slice operator borrowed from ES4.
?()	applies a filter (script) expression.
()	script expression, using the underlying script engine.

Sample json:

{
“firstName”: “John”,
“lastName” : “doe”,
“age” : 26,
“address” : {
“streetAddress”: “naist street”,
“city” : “Nara”,
“postalCode” : “630-0192”
},
“phoneNumbers”: [
{
“type” : “iPhone”,
“number”: “0123-4567-8888”
},
{
“type” : “home”,
“number”: “0123-4567-8910”
}
]
}

json query to get iphone number

$.phoneNumbers.[0].number

[
“0123-4567-8888”
]

But order may not be standard, if we user number 0, it prints phone number of first item in the phoneNumbers list. We can write more specific query to get only iPhone number

$.phoneNumbers.[?(@.type == ‘iPhone’)].number

[
“0123-4567-8888”
]

hbase performnce tuning

tuning-hbase-for-optimized-performance-part-1

Oracle DB pre built VM bringing up with vagrant

This is setup a ETL from oracle database to mysql/datawerehouse using open source tool like  Talend openstudio.

Pre Requisites for SANBOX environment:

1. Pre-built Virtual Machine for Oracle Enterprise Data Quality 12.2.1

Download The sandbox from Oracle and for installation steps use the guide clickhere

The following software is installed in this VirtualBox image, we just need bold highlighted software.

• Oracle Enterprise Linux (64-bit) 6.6
• Oracle Enterprise Data Quality 12.2.1.0.0
• Oracle Enterprise Data Quality Customer Data Services Pack 12.2.1.0.0
• Oracle Enterprise Data Quality Address Verification 15.3.0.0.0
• Oracle Watchlist Screening 11.1.1.7.3
• Oracle Database Enterprise Edition 12.1.0.1.0
• Oracle WebLogic Server 12.2.1.0.0
• Oracle SQL Developer 3.2.20.09.90
• Oracle Java SE Development Kit Version 8, Update 65

system Requirements:

Please note that this VirtualBox appliance requires a host machine with a minimum of 8GB memory installed, and that 16GB is recommended; your host computer must also have an up to date Java Runtime Environment (JRE) installed.

Installation Procedure:

ls -l
total 10659316
-rw-rw-r– 1 user user 2147483648 Mar 23 19:47 EDQ-12.2.1-Trn.zip.001
-rw-rw-r– 1 user user 2147483648 Mar 23 18:59 EDQ-12.2.1-Trn.zip.002
-rw-rw-r– 1 user user 2147483648 Mar 23 18:57 EDQ-12.2.1-Trn.zip.003
-rw-rw-r– 1 user user 2147483648 Mar 23 18:57 EDQ-12.2.1-Trn.zip.004
-rw-rw-r– 1 user user 2147483648 Mar 23 18:57 EDQ-12.2.1-Trn.zip.005
-rw-rw-r– 1 user user 177698269 Mar 23 18:44 EDQ-12.2.1-Trn.zip.006

cat EDQ-12.2.1-Trn.zip.00* > EDQ-12.2.1-Trn.zip

unzip EDQ-12.2.1-Trn.zip
Archive: EDQ-12.2.1-Trn.zip
inflating: EDQ-12.2.1-Trn.ova

NOTE: Attempt to import EDQ-12.2.1 failed with following error

2nd Attempt made with following with EDQ-12.1.3

Pre-built Virtual Machine for Oracle Enterprise Data Quality 12.1.3

Overview

Please note that this appliance is for testing purposes only, as such it is unsupported and should not be used in production environments.

This VirtualBox appliance contains a fully configured, ready-to-use Oracle Enterprise Data Quality 12.1.3 installation.  It also includes the Oracle Enterprise Data Quality Customer Data Services Pack 11.1.1.7.4, and Oracle Watchlist Screening 11.1.1.7.3.

All you need is to install Oracle VM VirtualBox on your desktop/laptop  and you are ready to try out Oracle Enterprise Data Quality 12.1.3 — no installation and configuration required!

The following software is installed in this VirtualBox image:

• Oracle Enterprise Linux (64-bit) 6.6
• Oracle Enterprise Data Quality 12.1.3.0.0
• Oracle Enterprise Data Quality Customer Data Services Pack 11.1.1.7.4
• Oracle Enterprise Data Quality Address Verification 14.4.0.0.0
• Oracle Watchlist Screening 11.1.1.7.3
• Oracle Database Enterprise Edition 12.1.0.1.0
• Oracle WebLogic Server 12.1.3.0.0
• Oracle SQL Developer 3.2.20.09.90
• Oracle Java SE Development Kit Version 7, Update 71
• Oracle Java SE Development Kit Version 8, Update 25

Please note that this VirtualBox appliance requires a host machine with a minimum of 8GB memory installed, and that 16GB is recommended; your host computer must also have an up to date Java Runtime Environment (JRE) installed.

Please check the EDQ 12.1.3 VM Installation Guide for detailed instructions on downloading and importing the VirtualBox image and make sure to also check the Release Notes.

• Download and install Oracle VM VirtualBoxEDQ-12.1.3-Trn2.zip.001 (2,147,483,648 bytes)
  EDQ-12.1.3-Trn2.zip.002 (2,147,483,648 bytes)
  EDQ-12.1.3-Trn2.zip.003 (2,147,483,648 bytes)
  EDQ-12.1.3-Trn2.zip.004 (2,147,483,648 bytes)
  EDQ-12.1.3-Trn2.zip.005 (2,147,483,648 bytes)
  EDQ-12.1.3-Trn2.zip.006 (1,104,749,498 bytes)

1. Go to oracle github vagrant

https://github.com/oracle/vagrant-boxes/tree/master/OracleDatabase/12.2.0.1

2.  Follow the steps:

$cd /media/user/E224F55324F52AE5/oracle12db

$git clone https://github.com/oracle/vagrant-boxes

$cd vagrant-boxes/OracleDatabase/12.2.0.1

$mv ~user/Downloads/linuxx64_12201_database.zip .

$vagrant up
Bringing machine ‘oracle-12201-vagrant’ up with ‘virtualbox’ provider…
==> oracle-12201-vagrant: Box ‘ol7-latest’ could not be found. Attempting to find and install…
oracle-12201-vagrant: Box Provider: virtualbox
oracle-12201-vagrant: Box Version: >= 0
==> oracle-12201-vagrant: Box file was not detected as metadata. Adding it directly…
==> oracle-12201-vagrant: Adding box ‘ol7-latest’ (v0) for provider: virtualbox
oracle-12201-vagrant: Downloading: https://yum.oracle.com/boxes/oraclelinux/latest/ol7-latest.box

—> failed as AMD-V (virtualization feature for AMD processor) not enabled in Bios.

2nd attempt:

$vagrant up
Bringing machine ‘oracle-12201-vagrant’ up with ‘virtualbox’ provider…
==> oracle-12201-vagrant: Clearing any previously set forwarded ports…
==> oracle-12201-vagrant: Clearing any previously set network interfaces…
==> oracle-12201-vagrant: Preparing network interfaces based on configuration…
oracle-12201-vagrant: Adapter 1: nat
==> oracle-12201-vagrant: Forwarding ports…
oracle-12201-vagrant: 1521 (guest) => 1521 (host) (adapter 1)
oracle-12201-vagrant: 5500 (guest) => 5500 (host) (adapter 1)
oracle-12201-vagrant: 22 (guest) => 2222 (host) (adapter 1)
==> oracle-12201-vagrant: Running ‘pre-boot’ VM customizations…
==> oracle-12201-vagrant: Booting VM…
==> oracle-12201-vagrant: Waiting for machine to boot. This may take a few minutes…
oracle-12201-vagrant: SSH address: 127.0.0.1:2222
oracle-12201-vagrant: SSH username: vagrant
oracle-12201-vagrant: SSH auth method: private key
oracle-12201-vagrant:
oracle-12201-vagrant: Vagrant insecure key detected. Vagrant will automatically replace
oracle-12201-vagrant: this with a newly generated keypair for better security.
oracle-12201-vagrant:
oracle-12201-vagrant: Inserting generated public key within guest…
oracle-12201-vagrant: Removing insecure key from the guest if it’s present…
oracle-12201-vagrant: Key inserted! Disconnecting and reconnecting using new SSH key…
The private key to connect to this box via SSH has invalid permissions
set on it. The permissions of the private key should be set to 0600, otherwise SSH will
ignore the key. Vagrant tried to do this automatically for you but failed. Please set the
permissions on the following file to 0600 and then try running this command again:

/media/user/E224F55324F52AE5/oracle12db/vagrant-boxes/OracleDatabase/12.2.0.1/.vagrant/machines/oracle-12201-vagrant/virtualbox/private_key

Note that this error occurs after Vagrant automatically tries to
do this for you. The likely cause of this error is a lack of filesystem
permissions or even filesystem functionality. For example, if your
Vagrant data is on a USB stick, a common case is that chmod is
not supported. The key will need to be moved to a filesystem that
supports chmod.

3rd attempt:

vagrant up
Bringing machine ‘oracle-12201-vagrant’ up with ‘virtualbox’ provider…
==> oracle-12201-vagrant: This machine used to live in /media/user/E224F55324F52AE5/oracle12db/vagrant-boxes/OracleDatabase/12.2.0.1 but it’s now at /home/user/oracle12db/vagrant-boxes/OracleDatabase/12.2.0.1.
==> oracle-12201-vagrant: Depending on your current provider you may need to change the name of
==> oracle-12201-vagrant: the machine to run it as a different machine.
==> oracle-12201-vagrant: Running provisioner: shell…
oracle-12201-vagrant: Running: /tmp/vagrant-shell20190325-5246-17fd2r5.sh
oracle-12201-vagrant: INSTALLER: Started up
oracle-12201-vagrant: Resolving Dependencies
oracle-12201-vagrant: –> Running transaction check

——Succeeded

oracle-12201-vagrant: ORACLE PASSWORD FOR SYS, SYSTEM AND PDBADMIN: xxxxxxxx
oracle-12201-vagrant: INSTALLER: Installation complete, database ready to use!
(base) user@ubuntu18:~/oracle12db/vagrant-boxes/OracleDatabase/12.2.0.1$

Note: It print db password last but one line make note of it.

How to Install AZURE VM using Terraform

Reference: Microsoft LINK about the steps

HASHICORP link on azure build

Install terraform:

_{wget –no-check-certificate https://releases.hashicorp.com/terraform/0.14.6/terraform_0.14.6_linux_amd64.zip
unzip terraform_0.14.6_linux_amd64.zip
#Update .profile with path}

_{vi ~/.profile
source ~/.profile
terraform -install-autocomplete}

Install azcli:
_{curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash
sudo apt-get install ca-certificates curl apt-transport-https lsb-release gnupg
AZ_REPO=$(lsb_release -cs)
echo “deb [arch=amd64] https://packages.microsoft.com/repos/azure-cli/ $AZ_REPO main” | sudo tee /etc/apt/sources.list.d/azure-cli.list
curl -sL https://packages.microsoft.com/keys/microsoft.asc|gpg –dearmor| sudo tee /etc/apt/trusted.gpg.d/microsoft.gpg}

_{mkdir /tf/learn-terraform-azure
cd /tf/learn-terraform-azure}
STEP#1 create the terraform file “main.tf” with all required Azure Resources
_{vi main.tf}

###Configure the Azure provider

terraform {
required_providers {
azurerm = {
source = “hashicorp/azurerm”
version = “>= 2.26”
}
}
}
provider “azurerm” {
features {}
}

###Create Resource Group with name “myrg” in eastus2 location.

resource “azurerm_resource_group” “rg” {
name = “myrg”
location = “eastus2”
tags = {
environment = “Terraform Demo”
}
}

###Create Azure virtual network with name “myVnet”

resource “azurerm_virtual_network” “mynw” {
name = “myVnet”
address_space = [“10.0.0.0/16”]
location = “eastus2”
resource_group_name = azurerm_resource_group.rg.name
tags = {
environment = “Terraform Demo”
}
}

###Create subnetwork on virtual network created above.

resource “azurerm_subnet” “mysn” {
name = “mySubnet”
resource_group_name = azurerm_resource_group.rg.name
virtual_network_name = azurerm_virtual_network.mynw.name
address_prefixes = [“10.0.2.0/24”]
}

###Create public IP

resource “azurerm_public_ip” “mypip” {
name = “myPublicIP”
location = “eastus2”
resource_group_name = azurerm_resource_group.rg.name
allocation_method = “Dynamic”
tags = {
environment = “Terraform Demo”
}
}

###NSG rules are important for security

resource “azurerm_network_security_group” “mynsg” {
name = “myNetworkSecurityGroup”
location = “eastus2”
resource_group_name = azurerm_resource_group.rg.name
security_rule {
name = “SSH”
priority = 1001
direction = “Inbound”
access = “Allow”
protocol = “Tcp”
source_port_range = “” destination_port_range = “22” source_address_prefix = ““
destination_address_prefix = “*”
}
tags = {
environment = “Terraform Demo”
}
}

###Create Azure network interface

resource “azurerm_network_interface” “mytfnic” {
name = “myNIC”
location = “eastus2”
resource_group_name = azurerm_resource_group.rg.name

ip_configuration {
    name                          = "myNicConfiguration"
    subnet_id                     = azurerm_subnet.mysn.id
    private_ip_address_allocation = "Dynamic"
    public_ip_address_id          = azurerm_public_ip.mypip.id
}

tags = {
    environment = "Terraform Demo"
}

}

###Connect the security group to the network interface

resource “azurerm_network_interface_security_group_association” “sg2nic” {
network_interface_id = azurerm_network_interface.mytfnic.id
network_security_group_id = azurerm_network_security_group.mynsg.id
}

###Create Stoage Account with random name

resource “random_id” “randomId” {
keepers = {
# Generate a new ID only when a new resource group is defined
resource_group = azurerm_resource_group.rg.name
}
byte_length = 8
}
resource “azurerm_storage_account” “mysa” {
name = “diag${random_id.randomId.hex}”
resource_group_name = azurerm_resource_group.rg.name
location = “eastus2”
account_replication_type = “LRS”
account_tier = “Standard”

tags = {
    environment = "Terraform Demo"
}

}

###Private keys creation

resource “tls_private_key” “example_ssh” {
algorithm = “RSA”
rsa_bits = 4096
}
output “tls_private_key” { value = tls_private_key.example_ssh.private_key_pem }

###Now create the Azure VM

resource “azurerm_linux_virtual_machine” “mytfvm” {
name = “myVM”
location = “eastus2”
resource_group_name = azurerm_resource_group.rg.name
network_interface_ids = [azurerm_network_interface.mytfnic.id]
size = “Standard_DS1_v2”
os_disk {
name = “myOsDisk”
caching = “ReadWrite”
storage_account_type = “Standard_LRS”
}

source_image_reference {
    publisher = "Canonical"
    offer     = "UbuntuServer"
    sku       = "18.04-LTS"
    version   = "latest"
}

computer_name  = "myvm"
admin_username = "azuser1"
disable_password_authentication = true

admin_ssh_key {
    username       = "azuser1"
    public_key     = tls_private_key.example_ssh.public_key_openssh
}

boot_diagnostics {
    storage_account_uri = azurerm_storage_account.mysa.primary_blob_endpoint
}

tags = {
    environment = "Terraform Demo"
}

}
STEP2: Run the plan
$terraform plan
STEP3: Execute now to create the resources
$terraform apply
STEP4: ls terraform.tfstate
Connect to Azure VM:

1. create the private key “azuser1.pem”
2. Change permissions “chmod 400 azuser1.pem”
3. Connect to VM using: ssh -i azuser1.pem azuser1@

~/tf/learn-terraform-azure$ terraform destroy

terraform_destroy_outputDownload

kafka study resources

1.Always rely on creators. So go to Apache documentation

2. How do you know upcoming features in Kafka (Road map).

Anser is “Kafka Improvement Proposals”

https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals

It also give you answers like, what is the motivation to move away from zookeeper ? Answer is KIP-500

Motivation

Currently, Kafka uses ZooKeeper to store its metadata about partitions and brokers, and to elect a broker to be the Kafka Controller.  We would like to remove this dependency on ZooKeeper.  This will enable us to manage metadata in a more scalable and robust way, enabling support for more partitions.  It will also simplify the deployment and configuration of Kafka.

3. Apache Kafka for Absolute Beginners by Prashant Kumar Pandey

4. How to administer kafka ?

Excellent administrative notes on managing Kafka clusters.

https://wikitech.wikimedia.org/wiki/Kafka/Administration

5. How to Bench Mark Kafka ?

varnishkafka : https://github.com/wikimedia/varnishkafka

6. How to Integrate Kafka Connect With Mysql Server on Command Line Interface Over Multi-Node Multi-Broker Architecture

7. Introduction to Topic Log Compaction in Apache Kafka

8. Kafka Connectors search ?

http://www.confluent.io/hub/

docker course in katacoda

https://www.katacoda.com/courses/container-runtimes