Task 11
An administrator has noticed that after a host failure, the SQL03 VM was not powered back on from another host within the cluster. The Other SQL VMs (SQL01, SQL02) have recovered properly in the past.
Resolve the issue and configure the environment to ensure any single host failure affects a minimal number os SQL VMs.
Note: Do not power on any VMs
One possible reason why the SQL03 VM was not powered back on after a host failure is that the cluster was configured with the default (best effort) VM high availability mode, which does not guarantee the availability of VMs in case of insufficient resources on the remaining hosts. To resolve this issue, I suggest changing the VM high availability mode to guarantee (reserved segments), which reserves some memory on each host for failover of VMs from a failed host. This way, the SQL03 VM will have a higher chance of being restarted on another host in case of a host failure.
To change the VM high availability mode to guarantee (reserved segments), you can follow these steps:
Log in to Prism Central and select the cluster where the SQL VMs are running.
Click on the gear icon on the top right corner and select Cluster Settings.
Under Cluster Services, click on Virtual Machine High Availability.
Select Guarantee (Reserved Segments) from the drop-down menu and click Save.
To configure the environment to ensure any single host failure affects a minimal number of SQL VMs, I suggest using anti-affinity rules, which prevent VMs that belong to the same group from running on the same host. This way, if one host fails, only one SQL VM will be affected and the other SQL VMs will continue running on different hosts.
To create an anti-affinity rule for the SQL VMs, 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 Group.
Enter a name for the group, such as SQL Group, and click Next.
Select the SQL VMs (SQL01, SQL02, SQL03) from the list and click Next.
Select Anti-Affinity from the drop-down menu and click Next.
Review the group details and click Finish.
I hope this helps. How else can I help?
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 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 10
An administrator is working to create a VM using Nutanix V3 API calls with the following specifications.
* VM specifications:
* vCPUs: 2
* Memory: BGb
* Disk Size: 50Gb
* Cluster: Cluster A
* Network: default- net
The API call is falling, indicating an issue with the payload:
The body is saved in Desktop/ Files/API_Create_VM,text
Correct any issues in the text file that would prevent from creating the VM. Also ensure the VM will be created as speeded and make sure it is saved for re-use using that filename.
Deploy the vm through the API
Note: Do not power on the VM.
https://portal.nutanix.com/page/documents/kbs/details?targetId=kA00e000000LLEzCAO
https://jsonformatter.curiousconcept.com/#
acli net.list (uuid network defult_net)
ncli cluster info (uuid cluster)
Put Call: https://Prism Central IP address : 9440/api/nutanix/v3vms
Edit these lines to fix the API call, do not add new lines or copy lines.
You can test using the Prism Element API explorer or PostMan
Body:
{
{
'spec': {
'name': 'Test_Deploy',
'resources': {
'power_state':'OFF',
'num_vcpus_per_socket': ,
'num_sockets': 1,
'memory_size_mib': 8192,
'disk_list': [
{
'disk_size_mib': 51200,
'device_properties': {
'device_type':'DISK'
}
},
{
'device_properties': {
'device_type':'CDROM'
}
}
],
'nic_list':[
{
'nic_type': 'NORMAL_NIC',
'is_connected': true,
'ip_endpoint_list': [
{
'ip_type': 'DHCP'
}
],
'subnet_reference': {
'kind': 'subnet',
'name': 'default_net',
'uuid': '00000000-0000-0000-0000-000000000000'
}
}
],
},
'cluster_reference': {
'kind': 'cluster',
'name': 'NTNXDemo',
'uuid': '00000000-0000-0000-0000-000000000000'
}
},
'api_version': '3.1.0',
'metadata': {
'kind': 'vm'
}
}
https://www.nutanix.dev/2019/08/26/post-a-package-building-your-first-nutanix-rest-api-post-request/
Reference
Task 12
An administrator needs to create a report named VMs_Power_State that lists the VMs in the cluster and their basic details including the power state for the last month.
No other entities should be included in the report.
The report should run monthly and should send an email to admin@syberdyne.net when it runs.
Generate an instance of the report named VMs_Power_State as a CSV and save the zip file as Desktop\Files\VMs_Power_state.zip
Note: Make sure the report and zip file are named correctly. The SMTP server will not be configured.
To create a report named VMs_Power_State that lists the VMs in the cluster and their basic details including the power state for the last month, 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 VMs_Power_State 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 VM. Click Next.
Under the Custom Columns option, add the following variables: Name, Cluster Name, vCPUs, Memory, Power State. Click Next.
Under the Time Period option, select Last Month. Click Next.
Under the Report Settings option, select Monthly from the Schedule drop-down menu. Enter admin@syberdyne.net as the Email Recipient. Select CSV as the Report Output Format. Click Next.
Review the report details and click Finish.
To generate an instance of the report named VMs_Power_State as a CSV and save the zip file as Desktop\Files\VMs_Power_state.zip, you can follow these steps:
Log in to Prism Central and click on Operations on the left menu.
Select Reports from the drop-down menu and find the VMs_Power_State report from the list. Click on Run Now.
Wait for the report to be generated and click on Download Report. Save the file as Desktop\Files\VMs_Power_state.zip.
1. Open the Report section on Prism Central (Operations > Reports)
2. Click on the New Report button to start the creation of your custom report
3. Under the Custom Views section, select Data Table
4. Provide a title to your custom report, as well as a description if required.
5. Under the Entity Type option, select VM
6. This report can include all as well as a selection of the VMs
7. Click on the Custom Columns option and add the below variables:
a. Name - Name of the listed Virtual Machine
b. vCPUs - A combination of the vCores and vCPU's assigned to the Virtual Machine
c. Memory - Amount of memory assigned to the Virtual Machine
d. Disk Capacity - The total amount of assigned virtual disk capacity
e. Disk Usage - The total used virtual disk capacity
f. Snapshot Usage - The total amount of capacity used by snapshots (Excluding Protection Domain snapshots)
8. Under the Aggregation option for Memory and Disk Usage accept the default Average option
9. Click on the Add button to add this custom selection to your report
10. Next click on the Save and Run Now button on the bottom right of the screen
11. Provide the relevant details on this screen for your custom report:
12. You can leave the Time Period For Report variable at the default of Last 24 Hours
13. Specify a report output of preference (PDF or CSV) and if required Additional Recipients for this report to be mailed to. The report can also simply be downloaded after this creation and initial run if required
14. Below is an example of this report in a CSV format:
