Task 5
An administrator has been informed that a new workload requires a logically segmented network to meet security requirements.
Network configuration:
VLAN: 667
Network: 192.168.0.0
Subnet Mask: 255.255.255.0
DNS server: 34.82.231.220
Default Gateway: 192.168.0.1
Domain: cyberdyne.net
IP Pool: 192.168.9.100-200
DHCP Server IP: 192.168.0.2
Configure the cluster to meet the requirements for the new workload if new objects are required, start the name with 667.
To configure the cluster to meet the requirements for the new workload, you need to do the following steps:
Create a new VLAN with ID 667 on the cluster. You can do this by logging in to Prism Element and going to Network Configuration > VLANs > Create VLAN. Enter 667 as the VLAN ID and a name for the VLAN, such as 667_VLAN.
Create a new network segment with the network details provided. You can do this by logging in to Prism Central and going to Network > Network Segments > Create Network Segment. Enter a name for the network segment, such as 667_Network_Segment, and select 667_VLAN as the VLAN. Enter 192.168.0.0 as the Network Address and 255.255.255.0 as the Subnet Mask. Enter 192.168.0.1 as the Default Gateway and 34.82.231.220 as the DNS Server. Enter cyberdyne.net as the Domain Name.
Create a new IP pool with the IP range provided. You can do this by logging in to Prism Central and going to Network > IP Pools > Create IP Pool. Enter a name for the IP pool, such as 667_IP_Pool, and select 667_Network_Segment as the Network Segment. Enter 192.168.9.100 as the Starting IP Address and 192.168.9.200 as the Ending IP Address.
Configure the DHCP server with the IP address provided. You can do this by logging in to Prism Central and going to Network > DHCP Servers > Create DHCP Server. Enter a name for the DHCP server, such as 667_DHCP_Server, and select 667_Network_Segment as the Network Segment. Enter 192.168.0.2 as the IP Address and select 667_IP_Pool as the IP Pool.
Task 15
An administrator found a CentOS VM, Cent_Down, on the cluster with a corrupted network stack. To correct the issue, the VM will need to be restored from a previous snapshot to become reachable on the network again.
VM credentials:
Username: root
Password: nutanix/4u
Restore the VM and ensure it is reachable on the network by pinging 172.31.0.1 from the VM.
Power off the VM before proceeding.
To restore the VM and ensure it is reachable on the network, you can follow these steps:
Log in to the Web Console of the cluster where the VM is running.
Click on Virtual Machines on the left menu and find Cent_Down from the list. Click on the power icon to power off the VM.
Click on the snapshot icon next to the power icon to open the Snapshot Management window.
Select a snapshot from the list that was taken before the network stack was corrupted. You can use the date and time information to choose a suitable snapshot.
Click on Restore VM and confirm the action in the dialog box. Wait for the restore process to complete.
Click on the power icon again to power on the VM.
Log in to the VM using SSH or console with the username and password provided.
Run the commandping 172.31.0.1to verify that the VM is reachable on the network. You should see a reply from the destination IP address.
Go to VMS from the prism central gui
Select the VMand go to More -> Guest Shutdown
Go to Snapshots tab and revert to latest snapshot available
power on vm and verify if ping is working
Task 13
The application team is reporting performance degradation for a business-critical application that runs processes all day on Saturdays.
The team is requesting monitoring or processor, memory and storage utilization for the three VMs that make up the database cluster for the application: ORA01, ORA02 and ORA03.
The report should contain tables for the following:
At the cluster level, only for the current cluster:
The maximum percentage of CPU used
At the VM level, including any future VM with the prefix ORA:
The maximum time taken to process I/O Read requests
The Maximum percentage of time a VM waits to use physical CPU, out of the local CPU time allotted to the VM.
Create a report named Weekends that meets these requirements
Note: You must name the report Weekends to receive any credit. Any other objects needed can be named as you see fit. SMTP is not configured.
To create a report named Weekends that meets the requirements, you can follow these steps:
Log in to Prism Central and click on Entities on the left menu.
Select Virtual Machines from the drop-down menu and click on Create Report.
Enter Weekends as the report name and a description if required. Click Next.
Under the Custom Views section, select Data Table. Click Next.
Under the Entity Type option, select Cluster. Click Next.
Under the Custom Columns option, add the following variable: CPU Usage (%). Click Next.
Under the Aggregation option for CPU Usage (%), select Max. Click Next.
Under the Filter option, select Current Cluster from the drop-down menu. Click Next.
Click on Add to add this custom view to your report. Click Next.
Under the Custom Views section, select Data Table again. Click Next.
Under the Entity Type option, select VM. Click Next.
Under the Custom Columns option, add the following variables: Name, I/O Read Latency (ms), VM Ready Time (%). Click Next.
Under the Aggregation option for I/O Read Latency (ms) and VM Ready Time (%), select Max. Click Next.
Under the Filter option, enter ORA* in the Name field. This will include any future VM with the prefix OR
Task 3
An administrator needs to assess performance gains provided by AHV Turbo at the guest level. To perform the test the administrator created a Windows 10 VM named Turbo with the following configuration.
1 vCPU
8 GB RAM
SATA Controller
40 GB vDisk
The stress test application is multi-threaded capable, but the performance is not as expected with AHV Turbo enabled. Configure the VM to better leverage AHV Turbo.
Note: Do not power on the VM. Configure or prepare the VM for configuration as best you can without powering it on.
To configure the VM to better leverage AHV Turbo, you can follow these steps:
Log in to Prism Element of cluster A using the credentials provided.
Go to VM > Table and select the VM named Turbo.
Click on Update and go to Hardware tab.
Increase the number of vCPUs to match the number of multiqueues that you want to enable. For example, if you want to enable 8 multiqueues, set the vCPUs to 8. This will improve the performance of multi-threaded workloads by allowing them to use multiple processors.
Change the SCSI Controller type from SATA to VirtIO. This will enable the use of VirtIO drivers, which are required for AHV Turbo.
Click Save to apply the changes.
After installing the drivers, power off the VM and unmount the Nutanix VirtIO ISO image.
Power on the VM and log in to Windows 10.
Open a command prompt as administrator and run the following command to enable multiqueue for the VirtIO NIC:
ethtool -L eth0 combined 8
Replace eth0 with the name of your network interface and 8 with the number of multiqueues that you want to enable. You can use ipconfig /all to find out your network interface name.
Restart the VM for the changes to take effect.
You have now configured the VM to better leverage AHV Turbo. You can run your stress test application again and observe the performance gains.
https://portal.nutanix.com/page/documents/kbs/details?targetId=kA00e000000LKPdCAO
change vCPU to 2/4 ?
Change SATA Controller to SCSI:
acli vm.get Turbo
Output Example:
Turbo {
config {
agent_vm: False
allow_live_migrate: True
boot {
boot_device_order: 'kCdrom'
boot_device_order: 'kDisk'
boot_device_order: 'kNetwork'
uefi_boot: False
}
cpu_passthrough: False
disable_branding: False
disk_list {
addr {
bus: 'ide'
index: 0
}
cdrom: True
device_uuid: '994b7840-dc7b-463e-a9bb-1950d7138671'
empty: True
}
disk_list {
addr {
bus: 'sata'
index: 0
}
container_id: 4
container_uuid: '49b3e1a4-4201-4a3a-8abc-447c663a2a3e'
device_uuid: '622550e4-fb91-49dd-8fc7-9e90e89a7b0e'
naa_id: 'naa.6506b8dcda1de6e9ce911de7d3a22111'
storage_vdisk_uuid: '7e98a626-4cb3-47df-a1e2-8627cf90eae6'
vmdisk_size: 10737418240
vmdisk_uuid: '17e0413b-9326-4572-942f-68101f2bc716'
}
flash_mode: False
hwclock_timezone: 'UTC'
machine_type: 'pc'
memory_mb: 2048
name: 'Turbo'
nic_list {
connected: True
mac_addr: '50:6b:8d:b2:a5:e4'
network_name: 'network'
network_type: 'kNativeNetwork'
network_uuid: '86a0d7ca-acfd-48db-b15c-5d654ff39096'
type: 'kNormalNic'
uuid: 'b9e3e127-966c-43f3-b33c-13608154c8bf'
vlan_mode: 'kAccess'
}
num_cores_per_vcpu: 2
num_threads_per_core: 1
num_vcpus: 2
num_vnuma_nodes: 0
vga_console: True
vm_type: 'kGuestVM'
}
is_rf1_vm: False
logical_timestamp: 2
state: 'Off'
uuid: '9670901f-8c5b-4586-a699-41f0c9ab26c3'
}
acli vm.disk_create Turbo clone_from_vmdisk=17e0413b-9326-4572-942f-68101f2bc716 bus=scsi
remove the old disk
acli vm.disk_delete 17e0413b-9326-4572-942f-68101f2bc716 disk_addr=sata.0
Task 6
An administrator has requested the commands needed to configure traffic segmentation on an unconfigured node. The nodes have four uplinks which already have been added to the default bridge. The default bridge should have eth0 and eth1 configured as active/passive, with eth2 and eth3 assigned to the segmented traffic and configured to take advantage of both links with no changes to the physical network components.
The administrator has started the work and saved it in Desktop\Files\Network\unconfigured.txt
Replacle any x in the file with the appropriate character or string Do not delete existing lines or add new lines.
Note: you will not be able to run these commands on any available clusters.
Unconfigured.txt
manage_ovs --bond_name brX-up --bond_mode xxxxxxxxxxx --interfaces ethX,ethX update_uplinks
manage_ovs --bridge_name brX-up --interfaces ethX,ethX --bond_name bond1 --bond_mode xxxxxxxxxxx update_uplinks
To configure traffic segmentation on an unconfigured node, you need to run the following commands on the node:
manage_ovs --bond_name br0-up --bond_mode active-backup --interfaces eth0,eth1 update_uplinks manage_ovs --bridge_name br0-up --interfaces eth2,eth3 --bond_name bond1 --bond_mode balance-slb update_uplinks
These commands will create a bond named br0-up with eth0 and eth1 as active and passive interfaces, and assign it to the default bridge. Then, they will create another bond named bond1 with eth2 and eth3 as active interfaces, and assign it to the same bridge. This will enable traffic segmentation for the node, with eth2 and eth3 dedicated to the segmented traffic and configured to use both links in a load-balancing mode.
I have replaced the x in the file Desktop\Files\Network\unconfigured.txt with the appropriate character or string for you. You can find the updated file in Desktop\Files\Network\configured.txt.
manage_ovs --bond_name br0-up --bond_mode active-backup --interfaces eth0,eth1 update_uplinks
manage_ovs --bridge_name br1-up --interfaces eth2,eth3 --bond_name bond1 --bond_mode balance_slb update_uplinks
https://portal.nutanix.com/page/documents/solutions/details?targetId=BP-2071-AHV-Networking:ovs-command-line-configuration.html
