Brain's Workbench
Run the following command to list VMs and their UUIDs:
xe vm-list resident-on=<uuid_of_host>
Try the shutdown command with force:
xe vm-shutdown uuid=<uuid_of_vm> force=true
Restart the toolstack on the host by using the following command:
xe-toolstack-restart
Restart the host.
shutdown -r now
If the VM is still not shutdown, you might need to destroy the domain. However, the steps given below can cause problems for your VM and should only be done as a last resort.
Step 1: Update System
Let’s start the installation by updating all the system packages:
sudo apt update
Also consider performing an upgrade:
sudo apt upgrade -y
Step 2: Install Node.js on Ubuntu / Debian
Install dependencies.
sudo apt install -y ca-certificates curl gnupg
Import GPG repository keys:
sudo mkdir -p /etc/apt/keyrings curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | sudo gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
The next step is the installation of Node.js on Ubuntu / Debian Linux system:
Citrix Xen uses a custom virtual appliance format for import/export called “XVA”. it’s basically a strangely crafted tar-file. You don’t need this program to unpack this tar-file, just use your favourite tar unpacker (tar, gtar, bsdtar). Once unpacked you will end up with a lot of different files, ova.xml (which contains the settings for the virtual appliance, think VMware vmx) and a number of folders called Ref:/, this is your disks. Each of these folders contain hundreds of files named 00000000, 00000001 with a accompanying .CHECKSUM file (SHA1). Each file is a 1MB slice of the disk, but some of the files in the sequence will probably be missing this is because XVA do not use compression; instead it will exclude slices of the disk that only contains zeros (are empty). This tool can assemble the disk for you (you will end up with a RAW disk) that can easily be mounted and modified. It can then also split the file again and generate checksum. Once ready, you will probably want to use the “package” command to rebuild the XVA file.
I’m running this conversion into a Debian 11 Server. First thing, you need to install xvz-img package from git repo into Debian server. Let’s install some essential package first-
Start a new SSH session to your XenServer host and run the commands below.
### Using curl ### [18:18 xcp-node-01 ~]# bash -c "$(curl -sS https://xoa.io/deploy)"
### Using wget ### [18:18 xcp-node-01 ~]# bash -c "$(wget -qO- https://xoa.io/deploy)"
If you are using an old XenServer version, you may encounter SSL connection issues. This can bypassed by using the unsecure connection instead:
From the CLI:
Prework
apt-get update && apt-get dist-upgrade
Node.js
For this particular installation node 16 is needed to be installed. Lets install-
Add NodeSource PPA
This command will add PPA sources required to be able to install NodeJS 16 on your Ubuntu 20.04 installation:
curl -s https://deb.nodesource.com/setup_16.x | sudo bash
Install NodeJS 16
Now that the PPA source has been added, we can install NodeJS 16 on our Ubuntu 20.04 installation. Run the following command:
sudo apt install nodejs -y
Tip: The -y flag means we’re not prompted to confirm our choices.
Instructions
xe vm-list resident-on=<uuid_of_host>
xe vm-shutdown uuid=<UUID from step 3> force=true
xe vm-reset-powerstate uuid=<UUID from step 3> force=true
list_domains
Now run this command using the domain ID from the output of step 7
xl destroy <DOMID from step 7>
To start the VM use-
xe vm-start name-label=$VMN
Identify VM’s UUID
We start by identifying a virtual machine we would lake to export to as a regular backup file. Run xe vm-list to list all available virtual machines and take a note of the virtual machine in question:
# xe vm-list uuid ( RO) : 7371124f-7d4d-66b7-cbc7-a98b1457543e name-label ( RW): Debian Jessie 8.5 power-state ( RO): halted uuid ( RO) : bad8e456-df88-435d-ba12-3f0f6e54b2c6 name-label ( RW): Control domain on host: xenserver power-state ( RO): running
Take VM snapshot
There are six steps to correctly configuring SNMP on your Citrix Xen hypervisor. These steps don’t require a system restart and are non-service affecting.
To start, we assume you’re running Xen v6.x or v7.x, and are logged into the Xen CLI as root.
1. Enable the SNMP daemon
Enable the snmpd daemon by typing-
chkconfig snmpd
2. Configure the SNMP service
Make a backup of the snmpd.conf file. The default snmpd.conf file contains a lot of useful documentation for more advanced implementations of SNMP.
# cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.backup
Instructions