XCP-ng
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login
    1. Home
    2. epretorious
    3. Posts
    Offline
    • Profile
    • Following 0
    • Followers 0
    • Topics 4
    • Posts 23
    • Groups 0

    Posts

    Recent Best Controversial
    • RE: Creating a VM using only the XAPI CLI...

      What does @tjkreidl have to say about bootstrapping an HVM guest using only XAPI on the CLI?

      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a VM using only the XAPI CLI...

      @olivierlambert said in Creating a VM using only the XAPI CLI...:

      You'll need a better client to do that.

      I don't understand. Would you please elaborate?

      TIA,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a VM using only the XAPI CLI...

      @olivierlambert Is there any way to bootstrap an HVM guest using only XAPI on the CLI?

      TIA,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • vCPU Over-Subscription...

      If it's possible to over-subscribe vCPU's: What do vCPU's really represent - A weighted average of CPU cycles that will be allocated to the guest?

      e.g., If a host has eight CPU cores with hyperthreading enabled and all four guests are allocated 16 vCPU's: What benefit will the four guests see over what they would experience if they had each been allocated 2 vCPU's?

      TIA,
      Eric Pretorious
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a VM using only the XAPI CLI...

      @olivierlambert Thanks. But I'm not looking for the most current method of installing a guest - I'm looking for the simplest method of installing a guest using XAPI on the command-line interface (CLI).

      The "Citrix XenServer 7.2 Virtual Machine User's Guide" includes a method to do that using the CLI:

      xe vm-install template=<template> new-name-label=<name_for_vm> sr-uuid=<storage_repository_uuid>
      
      xe vif-create vm-uuid=<vm_uuid> network-uuid=<network_uuid> mac=random device=0
      
      xe vm-param-set uuid=<vm_uuid> other-config:install-repository=<network_repository>
      
      xe vm-start uuid=<vm_uuid>
      

      But obviously it's missing something!

      Have you got any suggestions about what might be missing from those four simple steps?

      TIA,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a VM using only the XAPI CLI...

      @olivierlambert I don't understand. Would you please elaborate?

      TIA,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a VM using only the XAPI CLI...

      @olivierlambert

      • It's a CentOS-7 HVM guest.
      • What are these hidden files that you are referring to?
      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a VM using only the XAPI CLI...

      FWIW: These are the contents of the remote package repository (nfs://192.168.0.95/srv/pkgs/ISO)

      # mount -t nfs 192.168.0.95:/srv/pkgs/ISO /mnt
      
      # ll /mnt
      total 110
      -rw-rw-r-- 1 root root    14 Sep  9  2019 CentOS_BuildTag
      drwxr-xr-x 3 root root  2048 Sep  6  2019 EFI
      -rw-rw-r-- 1 root root   227 Aug 30  2017 EULA
      -rw-rw-r-- 1 root root 18009 Dec  9  2015 GPL
      drwxr-xr-x 3 root root  2048 Sep  9  2019 images
      drwxr-xr-x 2 root root  2048 Sep  9  2019 isolinux
      drwxr-xr-x 2 root root  2048 Sep  6  2019 LiveOS
      drwxrwxr-x 2 root root 73728 Sep 11  2019 Packages
      drwxrwxr-x 2 root root  4096 Sep 11  2019 repodata
      -rw-rw-r-- 1 root root  1690 Dec  9  2015 RPM-GPG-KEY-CentOS-7
      -rw-rw-r-- 1 root root  1690 Dec  9  2015 RPM-GPG-KEY-CentOS-Testing-7
      -r--r--r-- 1 root root  2883 Sep 11  2019 TRANS.TBL
      

      HTH,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a VM using only the XAPI CLI...

      FWIW: The result seems to be the same whether I use an ISO image on a remote NFS server (nfs://192.168.0.95/srv/images/ISO/CentOS-7.7-x86_64-Minimal.iso) or I use a remote package repository (nfs://192.168.0.95/srv/pkgs/ISO) for installation:

      # VM_UUID=$(xe vm-install template=CentOS\ 7 new-name-label=CentOS7-2)
      # echo $VM_UUID
      c9c66b15-e618-dc12-0f93-8e39af102c8b
      
      # VIF_UUID=$(xe vif-create mac=random device=0 vm-uuid=$VM_UUID network-uuid=$NET_UUID)
      # echo $VIF_UUID
      de6b51ec-54ed-fa0c-0ba2-7da732e8fa05
      
      # xe vm-param-set uuid=$VM_UUID other-config:install-repository=nfs://192.168.0.95/srv/pkgs/ISO
      
      # xe vm-start uuid=$VM_UUID
      
      # xe console uuid=$VM_UUID
      No text console available
      
      # xe vm-param-list uuid=$VM_UUID | grep dom-id
                                      dom-id ( RO): 8
      
      # xenstore-ls /local/domain/8
      xenstore-ls: xs_directory (/local/domain/8): No such file or directory
      

      What am I doing wrong?

      TIA,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • Creating a VM using only the XAPI CLI...

      I'm attempting to create a CentOS-7 VM from the CLI using modified instructions from the "Citrix XenServer 7.2 Virtual Machine User's Guide":

      # NET_UUID=$(xe network-list bridge=xenbr0 params=uuid | awk '{ print $5 }')
      # echo $NET_UUID
      47a6223e-74d0-b75d-bec3-0ca6324b498c
      
      # VM_UUID=$(xe vm-install template=CentOS\ 7 new-name-label=CentOS7-1)
      # echo $VM_UUID
      26859adf-f2f9-77d6-3f3c-719ecd885535
      
      # VIF_UUID=$(xe vif-create mac=random device=0 vm-uuid=$VM_UUID network-uuid=$NET_UUID)
      # echo $VIF_UUID
      decb158e-2961-7448-8b7c-4c2707298604
      
      # xe vm-param-set uuid=$VM_UUID other-config:install-repository=nfs://192.168.0.95/srv/images/ISO/CentOS-7.7-x86_64-Minimal.iso
      # xe vm-start uuid=$VM_UUID
      

      But when I use the console command in order to complete the installation of the operating system: I get this...

      # xe console uuid=$VM_UUID
      No text console available
      

      And when I search Xenstore for the VNC-port information I get this:

      # xe vm-param-list uuid=$VM_UUID | grep dom-id
                                      dom-id ( RO): -1
      

      What have I done wrong? How can I determine the root cause of the failure?

      TIA,
      Eric Pretorious
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      What's the purpose of this other VNC daemon on TCP/9500?

      From the Xen Project wiki page on XCP:

      The ports used for VNC console are 5901-5999, and the ports used for text console are 9501-9599.

      AFAICT: TCP/5900 & TCP/9500 belong to Dom0...

      # xenstore-ls /local/domain/0
      control = ""
       feature-poweroff = "1"
       feature-reboot = "1"
       feature-suspend = "1"
      domid = "0"
      name = "Domain-0"
      vncterm-pid = "1276"
      console = ""
       vnc-port = "5900"
       tc-port = "9500"
      vm = "/vm/7a4488c6-d4ac-4aaf-83f0-fb6d3f557f48"
      

      But I don't know how to connect to DomU #1's console because there is no entry in Xenstore for DomU #1:

      # xenstore-ls /local/domain/1
      xenstore-ls: xs_directory (/local/domain/1): No such file or directory
      

      Ideas? Suggestions?

      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      FWIW: I did notice that there was more than one TCP port connected to the VNC server:

      # netstat -tanp | grep vnc
      tcp        0      0 127.0.0.1:5900          0.0.0.0:*               LISTEN      1276/vncterm        
      tcp        0      0 127.0.0.1:9500          0.0.0.0:*               LISTEN      1276/vncterm
      

      So I also connected to the TCP/9500 port:

      $ ssh -L 9500:localhost:9500 root@192.168.0.92
      root@192.168.0.92's password: 
      Last login: Tue Nov  1 01:14:11 2022
      
      # xe vm-list name-label=CentOS7-1 
      uuid ( RO)           : 2f343ae1-0d57-ef21-6a54-6abe7b7264c6
           name-label ( RW): CentOS7-1
          power-state ( RO): running
      
      # xe vm-list name-label=CentOS7-1 params=dom-id
      dom-id ( RO)    : 1
      

      But nothing ever happened! i.e., The VNC client failed to open a window on my local system.

      What's the purpose of this other VNC daemon on TCP/9500?

      TIA,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      @olivierlambert Yes - I authenticated as the root user. But after that there was nothing - Only a terminal session like a standard SSH session!

      Ideas? Suggestions?

      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      I think that this wiki page from the Xen Project may provide the answer:

      • Use SSH to tunnel localhost:5900 to TCP/5900 of the host system. And then
      • Use a VNC client to access localhost:5900.

      I've already confirmed that the host is listening on TCP/5900:

      # netstat -tanp | grep \:59
      tcp        0      0 127.0.0.1:5900          0.0.0.0:*               LISTEN      1276/vncterm
      

      So I configured the tunnel:

      $ ssh -L 5900:localhost:5900 root@192.168.0.92
      root@192.168.0.92's password: 
      Last login: Tue Nov  1 01:10:30 2022
      
      # xe vm-list name-label=CentOS7-1 
      uuid ( RO)           : 2f343ae1-0d57-ef21-6a54-6abe7b7264c6
           name-label ( RW): CentOS7-1
          power-state ( RO): running
      
      # xe vm-list name-label=CentOS7-1 params=dom-id
      dom-id ( RO)    : 1
      

      And then I launched the client and connected to localhost:5900:

      $ vncviewer 
      
      TigerVNC Viewer 64-bit v1.12.0
      Built on: 2022-03-25 17:06
      Copyright (C) 1999-2021 TigerVNC Team and many others (see README.rst)
      See https://www.tigervnc.org for information on TigerVNC.
      
      Mon Oct 31 18:18:08 2022
       DecodeManager: Detected 8 CPU core(s)
       DecodeManager: Creating 4 decoder thread(s)
       CConn:       Connected to host localhost port 5900
       CConnection: Server supports RFB protocol version 3.3
       CConnection: Using RFB protocol version 3.3
       CConn:       Using pixel format depth 24 (32bpp) little-endian rgb888
      

      A connection is established:

      # netstat -tanp | grep \:59
      tcp        0      0 127.0.0.1:5900          0.0.0.0:*               LISTEN      1276/vncterm        
      tcp        0      0 127.0.0.1:34046         127.0.0.1:5900          ESTABLISHED 18949/sshd: root@pt 
      tcp        0      0 127.0.0.1:5900          127.0.0.1:34046         ESTABLISHED 1276/vncterm        
      

      But the display seems to be a text console on the host system!

      Have I misunderstood some detail?

      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      @olivierlambert Thanks!

      Using only the CLI: How can I connect VNC to the guest in order to complete the installation? e.g., xe console-list vm-name-label=<<<your_vm>>> lists an HTTP URL for connecting to the host...

      # xe console-list vm-name-label=CentOS7-1 
      uuid ( RO)             : fd376ea3-a644-2ed3-2d72-8ae7ca7a6b71
                vm-uuid ( RO): 2f343ae1-0d57-ef21-6a54-6abe7b7264c6
          vm-name-label ( RO): CentOS7-1
               protocol ( RO): RFB
               location ( RO): https://192.168.0.93/console?uuid=fd376ea3-a644-2ed3-2d72-8ae7ca7a6b71
      

      But it doesn't seem to do anything!

      TIA,
      Eric P.
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      @olivierlambert Thanks for asking! My goal is to manually create a single CentOS VM so that I can get a better understanding all of the complicated details that XO hides from XCP-ng/XenServer administrators.

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      @olivierlambert I'm just wanting to create a CentOS VM using the CLI.

      posted in Compute
      epretoriousE
      epretorious
    • RE: Creating a CentOS VM From the CLI...

      @olivierlambert Is there a command for connecting VNC to the VM's console?

      posted in Compute
      epretoriousE
      epretorious
    • Creating a CentOS VM From the CLI...

      I'm attempting to create a CentOS-7 VM from the CLI using the instructions from the "Citrix XenServer 7.2 Virtual Machine User's Guide":

      # xe network-list | grep -B1 eth0
      uuid ( RO)                : 47a6223e-74d0-b75d-bec3-0ca6324b498c
                name-label ( RW): Pool-wide network associated with eth0
      
      # xe pool-param-list uuid=e3cdb4f9-6589-2ac2-f08a-9318a8a48a61 | grep default-SR
      default-SR ( RW): 21044441-dfba-9293-408b-41379e194718
      
      # xe vm-install template=Red\ Hat\ Enterprise\ Linux\ 7 new-name-label=CentOS7-1 sr-uuid=21044441-dfba-9293-408b-41379e194718 
      2f343ae1-0d57-ef21-6a54-6abe7b7264c6
      
      # xe vif-create vm-uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6 network-uuid=47a6223e-74d0-b75d-bec3-0ca6324b498c mac=random device=0
      f21d558a-c9ba-bb65-d2bc-6c2310d4a0cf
      
      # xe vm-param-set uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6 other-config:install-repository=nfs://192.168.0.95/srv/images/ISO/CentOS-7.7-x86_64-Minimal.iso
      
      # xe vm-start uuid=2f343ae1-0d57-ef21-6a54-6abe7b7264c6
      

      But when I start the VM: XAPI complains No text console available

      # xe console vm=CentOS7-1
      No text console available
      
      # xe vm-list | grep -A1 -B1 CentOS
      uuid ( RO)           : 2f343ae1-0d57-ef21-6a54-6abe7b7264c6
           name-label ( RW): CentOS7-1
          power-state ( RO): running
      

      What am I doing wrong?

      TIA,
      Eric Pretorious
      Reno, Nevada

      posted in Compute
      epretoriousE
      epretorious
    • RE: New to XOA - Getting Started?

      @olivierlambert Refreshing the status log and updating a second time retrieves/installs more updates.

      After that: The '+ New' menu button appears in the menu on the left side of the window!

      Thank you!

      Eric P.
      Reno, Nevada

      posted in Xen Orchestra
      epretoriousE
      epretorious