Set Up Your KVM Virtual Machine for a Cloud Server Cluster

First configure the VM on the master node, and then configure the VM on each worker node.

Follow these steps to set up and configure your VM on a cluster of servers in a cloud deployment:

Verify that your master node meets the VM requirements.

When using a VM, the following system resources must be allocated:

Resource	Minimum Requirement
Processor	Four (4) virtual CPUs
Memory	8 GB RAM
Local disk storage	For NetQ 3.2.x and later: 64 GB (2 TB max) For NetQ 3.1 and earlier: 32 GB (2 TB max)
Network interface speed	1 Gb NIC
Hypervisor	KVM/QCOW (QEMU Copy on Write) image for servers running CentOS, Ubuntu and RedHat operating systems

Confirm that the needed ports are open for communications.

You must open the following ports on your NetQ Platforms:

Port or Protocol Number	Protocol	Component Access
8443	TCP	Admin UI
443	TCP	NetQ UI
31980	TCP	NetQ Agent communication
31982	TCP	NetQ Agent SSL communication
32708	TCP	API Gateway
22	TCP	SSH
179	TCP	Calico networking (BGP)
4	IP Protocol	Calico networking (IP-in-IP Protocol)
4789	UDP	Calico networking (VxLAN)
6443	TCP	kube-apiserver
2379	TCP	etcd datastore

Additionally, for internal cluster communication, you must open these ports:

Port	Protocol	Component Access
8080	TCP	Admin API
5000	TCP	Docker registry
8472	UDP	Flannel port for VXLAN
6443	TCP	Kubernetes API server
10250	TCP	kubelet health probe
2379	TCP	etcd
2380	TCP	etcd
7072	TCP	Kafka JMX monitoring
9092	TCP	Kafka client
7071	TCP	Cassandra JMX monitoring
7000	TCP	Cassandra cluster communication
9042	TCP	Cassandra client
7073	TCP	Zookeeper JMX monitoring
2888	TCP	Zookeeper cluster communication
3888	TCP	Zookeeper cluster communication
2181	TCP	Zookeeper client

Port 32666 is no longer used for the NetQ UI.

Download the NetQ Platform image.
Setup and configure your VM.

Open your hypervisor and set up your VM. You can use this example for reference or use your own hypervisor instructions.
KVM Example Configuration

This example shows the VM setup process for a system with Libvirt and KVM/QEMU installed.

Use the default credentials to log in the first time:

Username: cumulus
Password: cumulus

$ ssh cumulus@<ipaddr>
Warning: Permanently added '<ipaddr>' (ECDSA) to the list of known hosts.
Ubuntu 18.04.5 LTS
cumulus@<ipaddr>'s password:
You are required to change your password immediately (root enforced)
System information as of Thu Dec  3 21:35:42 UTC 2020
System load:  0.09              Processes:           120
Usage of /:   8.1% of 61.86GB   Users logged in:     0
Memory usage: 5%                IP address for eth0: <ipaddr>
Swap usage:   0%
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for cumulus.
(current) UNIX password: cumulus
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Connection to <ipaddr> closed.

$ ssh cumulus@<ipaddr>
Warning: Permanently added '<ipaddr>' (ECDSA) to the list of known hosts.
Ubuntu 18.04.5 LTS
cumulus@<ipaddr>'s password:
  System information as of Thu Dec  3 21:35:59 UTC 2020
  System load:  0.07              Processes:           121
  Usage of /:   8.1% of 61.86GB   Users logged in:     0
  Memory usage: 5%                IP address for eth0: <ipaddr>
  Swap usage:   0%
Last login: Thu Dec  3 21:35:43 2020 from <local-ipaddr>
cumulus@ubuntu:~$

Verify the master node is ready for installation. Fix any errors indicated before installing the NetQ software.
```
cumulus@hostname:~$ sudo opta-check-cloud
```
Change the hostname for the VM from the default value.

The default hostname for the NetQ Virtual Machines is ubuntu. Change the hostname to fit your naming conventions while meeting Internet and Kubernetes naming standards.

Kubernetes requires that hostnames are composed of a sequence of labels concatenated with dots. For example, “en.wikipedia.org” is a hostname. Each label must be from 1 to 63 characters long. The entire hostname, including the delimiting dots, has a maximum of 253 ASCII characters.

The Internet standards (RFCs) for protocols specify that labels may contain only the ASCII letters a through z (in lower case), the digits 0 through 9, and the hyphen-minus character ('-').

Use the following command:
```
cumulus@hostname:~$ sudo hostnamectl set-hostname NEW_HOSTNAME
```
Add the same NEW_HOSTNAME value to /etc/hosts on your VM for the localhost entry. Example:
```
127.0.0.1 localhost NEW_HOSTNAME
```
Verify that your first worker node meets the VM requirements, as described in Step 1.
Confirm that the needed ports are open for communications, as described in Step 2.
Open your hypervisor and set up the VM in the same manner as for the master node.

Make a note of the private IP address you assign to the worker node. You need it for later installation steps.
Verify the worker node is ready for installation. Fix any errors indicated before installing the NetQ software.
```
cumulus@hostname:~$ sudo opta-check-cloud
```
Repeat Steps 8 through 11 for each additional worker node you want in your cluster.
The final step is to install and activate the NetQ software using the CLI:

After NetQ is installed, you can log in to NetQ from your browser.

Set Up Your KVM Virtual Machine for a Cloud Server Cluster

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