Question

Installation


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Hello,
I am desperate, I have 2 disks and the USB stick with the ISo on my server.
If I now want to install Nutranix, I get to the disk selection, but even if I assign the disks to the respective letters, only Phoenix ISO is still mounted at the end
Then the install aborts and I can go back to the disk selection.

If I enter H,C, or D, the system says either I need SSD's, or I must have 2 disks, which I have.

Do I need ESXI on the server, not really if I use the AHV version?


41 replies

Userlevel 4
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You will need 3 disks in the system in order to complete the installation, one for the Hypervisor, one for the CVM and one for the Data disk.  At a minimum, you will have one drive marked as “I” for the installer (this is the phoenix ISO you boot from), “C” for CVM, “D” for data, and “H” for hypervisor.  It is required that you use an SSD for the CVM, and recommended for the Hypervisor.   Making sure the hypervisor disk is the smallest (it doesn’t need to be larger than say 64GB) also can help.   If you don’t mind posting a photo or screenshot of your disk selection screen it will definitely help.

Also give us some information about the server, what make/model/generation is it, CPU, and how much memory.   What kind of type and size of disks are you using, and what type of disk controller you have.   All of this information will streamline us getting you to a successful install

 

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I can’t use C 

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I have the 599gb of H (yes in the Screenshot it is wrong) and the other PERCH710 of D , but i cant use C (see under the Line the Command, why it must a SSD?)

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I have the 599gb of H (yes in the Screenshot it is wrong) and the other PERCH710 of D , but i cant use C

 

There is no Key information “I”

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It is a Dell R720, for a Testserver it is ok

Userlevel 4
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R720 is fine, I’ve run R720s many times in the past in my lab.   SSD is a requirement in order for Nutanix to function for the Controller VIrtual Machine.  This is where all of the initial writes go so needs to be performant.   THe reason you can’t use C is because none of the drives are SSDs. 

Also the “I” is probably lower on the list, you just need to scroll down.

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R720 is fine, I’ve run R720s many times in the past in my lab.   SSD is a requirement in order for Nutanix to function for the Controller VIrtual Machine.  This is where all of the initial writes go so needs to be performant.   THe reason you can’t use C is because none of the drives are SSDs. 

Also the “I” is probably lower on the list, you just need to scroll down.

When I create the USB stick, it should be set to UEFI no CSM, right?

 

Do I have to create the VD via the raid controller, because I had installed an SSD, but it only found it as an HDD

Userlevel 4
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I usually create my USB stick with both, but I tend to move it around from machine to machine and some support UEFI while others don’t.

Depending on which revision of the H710 you have, the best option is to flash it to IT mode, this will pass the drives through as they are and no need to create a VD, however if you have a version that can’t be flashed, create a RAID0 disk containing each disk individually (so if you have 3 disks, you have 3 RAID0 virtual devices)

Next, boot the CE installer, and you’ll see all the drives detected as HDDs,  note which one is actually your ssd (usually can tell by capacity or serial#) and hit Ctrl+C to break out of the installer
 

If the SSD drive you're going to put the CVM on is sdb, run:

echo 0 > /sys/block/sdb/queue/rotational

Then restart the installer and it should show your disk as an SSD

./ce_installer && screen -r

The installer should now let you assign your SSD to the CVM

 

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I usually create my USB stick with both, but I tend to move it around from machine to machine and some support UEFI while others don’t.

Depending on which revision of the H710 you have, the best option is to flash it to IT mode, this will pass the drives through as they are and no need to create a VD, however if you have a version that can’t be flashed, create a RAID0 disk containing each disk individually (so if you have 3 disks, you have 3 RAID0 virtual devices)

Next, boot the CE installer, and you’ll see all the drives detected as HDDs,  note which one is actually your ssd (usually can tell by capacity or serial#) and hit Ctrl+C to break out of the installer
 

If the SSD drive you're going to put the CVM on is sdb, run:

echo 0 > /sys/block/sdb/queue/rotational

Then restart the installer and it should show your disk as an SSD

./ce_installer && screen -r

The installer should now let you assign your SSD to the CVM

 

OK, so changing the HDD to SDD has worked.
But the USB stick cannot be set to "I"

Userlevel 4
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I would just proceed with the installation and see if it bombs, the “I” should be set automatically anyways.

Hi ktelep,

This installation takes more additional space once compared to the vmware installation. is it right…?

what are the benefits we are getting this type of a disk arrangement.

as an example….

if on vmware installation 1 x raid1 is enough it hold the hypervisor data. but here in nutanix. getting additional space to CVM,Hypervisor and Data Disk. 

is there any possibilities to done with a Single Disk. let me know. i’m new for nutanix

 

Thank You

Userlevel 4
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In Nutanix we are providing an entire hyperconverged stack, even a single node is a “cluster” so comparing it to just ESXi alone doesn’t make sense.  You need to compare it to ESXi + VSAN.

For ESXi+ VSAN, you need a device for the Hypervisor, a Device for Cache, and a device for Storage.
For Nutanix, you need a device for Hypervisor, a Device for CVM, and a device for ADDITIONAL Storage (The CVM disk actually provides some capacity for storage for Oplog and SSD capacity)

So there is the same requirement for AHV on Nutanix as ESXi.

Also note, there is currently no possibility for a single disk install, again due to the HCI nature of Nutanix as a platform.

Thanks for replying,

 i  got your point. this totally designed for HCI.

in vmware there’s disk architecture for HCI. The vmware has mentioned it’s limitations on Cache Tier as well as Storage Tier. but i didn’t get any clear information from nutanix for capacity sizing. where can i get that.

as well as considering this architecture in nutanix. is it possible to architect this for Small Medium business. if it possible how it will be cost comparing to vmware…? it it worth or not…..

 

Thank You

Userlevel 4
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I would read through http://www.nutanixbible.com   It will provide a lot of details on how the architecture works and lean into sizing.   We absolutely scale up and down.   I cover Healthcare primarily and we have as small as two node ROBO clusters for small facilities all the way up to massive all NVMe clusters for Epic workloads.   

I’m an engineer so I don’t do anything with pricing.   However costs are like anything else, it depends on the configuration.   Compared to many of the recent pricing changes within the VMWare ecosystem I always ask what are you comparing Nutanix pricing to, and in what context?

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Hello,
I was on vacation and would test this again today

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I would just proceed with the installation and see if it bombs, the “I” should be set automatically anyways.

Unfortunately, I can't continue because the installation always jumps back and I have to change something in the hard disk config

Unfortunately, "I" is not marked automatically

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https://virtualhci.wordpress.com/2021/01/04/installing-nutanix-ce-on-esxi-nested-vm/

here is no autmatically to “I”???

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eey i have installed, but i cant do this:

cluster --cluster_function_list="one_node_cluster" --svm_ips= (CVM IP) create

I became a error message

 

 

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cluster --cluster_function_list="one_node_cluster" --svm_ips= (CVM IP) create

i have the test Ip 10.10.10.2 an CVM:10.10.10.3

cluster --cluster_function_list="one_node_cluster" --svm_ips= 10.10.10.3 create

 

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And i cant open per Browser the Ips between , i dont became the UI

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Ok, its going, but now i must change the DNS ? where it is, because i cant ping google or other urls

Userlevel 4
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Hi @TrouBle 

From the CVM you can use ncli cluster-get-name-servers to check which one are configured (if any)

You can add them with ncli cluster add-to-name-servers servers=”The Server” one by one (up to three)

Hope this helps

Regards!

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Hi @TrouBle 

From the CVM you can use ncli cluster-get-name-servers to check which one are configured (if any)

You can add them with ncli cluster add-to-name-servers servers=”The Server” one by one (up to three)

Hope this helps

Regards!

thx,

but how can i fix the orther Problems:

 

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Hi @TrouBle 

From the CVM you can use ncli cluster-get-name-servers to check which one are configured (if any)

You can add them with ncli cluster add-to-name-servers servers=”The Server” one by one (up to three)

Hope this helps

Regards!

thx,

but how can i fix the orther Problems:

 

 

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And the LCM Upgrade is Standing by 87% how can i stopp it?

I have press Softly Stop, but the system simply continues without stopping

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