Apache Zookeeper is a highly reliable, open-source distributed coordination service designed to manage and synchronize distributed applications and systems. It provides essential tools for configuration management, synchronization, naming, and group membership, making it easier to build fault-tolerant and highly available distributed systems. Zookeeper is especially useful in scenarios where multiple processes or applications need to collaborate and coordinate in a distributed environment, ensuring consistency and proper communication between components.

At its core, Zookeeper uses a hierarchical namespace to store and manage metadata. This namespace is similar to a file system directory structure, and it stores information like configuration data, synchronization signals, and coordination markers. Clients interact with Zookeeper by performing operations like creating, updating, or deleting nodes in the namespace. These nodes can store data and provide locks, queues, and barriers, which are crucial for building distributed algorithms.

Zookeeper’s strong consistency guarantees ensure that all clients see the same data at the same time, even in the face of failures. It achieves this through a consensus protocol known as Zab (Zookeeper Atomic Broadcast), which ensures that all changes to the Zookeeper state are consistent and replicated across all servers in the ensemble. This guarantees high availability and fault tolerance, as any server in the ensemble can serve requests if other servers fail.

Zookeeper is widely used in scenarios such as service discovery, leader election, distributed locking, configuration management, and coordination of distributed tasks. It is a key component in the development of scalable, fault-tolerant systems in various domains, including cloud computing, big data, and microservices architectures. Its ability to coordinate and synchronize services and processes across large distributed systems makes it a crucial tool in modern infrastructure and application development.

To subscribe to this product from Azure Marketplace and initiate an instance using the Azure compute service, follow these steps:

1. Navigate to Azure Marketplace and subscribe to the desired product.
2. Search for “virtual machines” and select “Virtual machines” under Services.
3. Click on “Add” in the Virtual machines page, which will lead you to the Create a virtual machine page.
4. In the Basics tab:

• • Ensure the correct subscription is chosen under Project details.
  • Opt for creating a new resource group by selecting “Create new resource group” and name it as “myResourceGroup.”

5. Under Instance details:

• • Enter “myVM” as the Virtual machine name.
  • Choose “East US” as the Region.
  • Select “Ubuntu 18.04 LTS” as the Image.
  • Leave other settings as default.

6. For Administrator account:

• • Pick “SSH public key.”
  • Provide your user name and paste your public key, ensuring no leading or trailing white spaces.

7. Under Inbound port rules > Public inbound ports:

• • Choose “Allow selected ports.”
  • Select “SSH (22)” and “HTTP (80)” from the drop-down.

8. Keep the remaining settings at their defaults and click on “Review + create” at the bottom of the page.
9. The “Create a virtual machine” page will display the details of the VM you’re about to create. Once ready, click on “Create.”
10. The deployment process will take a few minutes. Once it’s finished, proceed to the next section.

To connect to the virtual machine:

1. Access the overview page of your VM and click on “Connect.”
2. On the “Connect to virtual machine” page:

• • Keep the default options for connecting via IP address over port 22.
  • A connection command for logging in will be displayed. Click the button to copy the command. Here’s an example of what the SSH connection command looks like:
    “`
    ssh [email protected]
    “`

3. Using the same bash shell that you used to generate your SSH key pair, you can either reopen the Cloud Shell by selecting >_ again

or going to https://shell.azure.com/bash.
4. Paste the SSH connection command into the shell to initiate an SSH session.

Usage/Deployment Instructions

Anarion Technologies – Apache Zookeeper

Note: Search product on Azure marketplace and click on “Get it now”

Click on Continue

Click on Create

Creating a Virtual Machine, enter or select appropriate values for zone, machine type, resource group and so on as per your choice.

After Process of Create Virtual Machine. You have got an Option Go to Resource Group 

Click Go to Resource Group

Click on the Network Security Group: zookeeper–nsg 

Click on Inbound Security Rule 

Click on Add.

Add Port.