Zabbix 7 - Formula to count number of CDP Neighbors

 Formula to count number of CDP Neighbors.

 count(last_foreach(//net.if.cdp.neighbor.name[*],5m))

 

Zabbix 7 - Searching on Zabbix

You can search using multiple keys in Zabbix API.

 

KEY1 = 'net.if.cdp.neighbor'
KEY2 = 'net.if.discovery' 

key_items_info = zapi.item.get(
            groupids=group_id,
            output=["hostid", "name", "lastvalue"],
            search={"key_": [KEY1, KEY2]},
            searchByAny=True,
            selectHosts=['name']
        )
 

By default, elements specified in "search" are "AND-ed". In order to "OR" them add searchByAny.

This will also search with wildcards.

"search": {"key_": "net.if.cdp.neighbor.*"},

"searchWildcardsEnabled": True 

Migrating VirtualBox VMs to VMware ESXi: A Step-by-Step Guide

Introduction:

Migrating virtual machines (VMs) between hypervisors can seem daunting, but with the right steps, it's a straightforward process. In this guide, we'll walk you through migrating a VirtualBox VM to VMware ESXi, focusing on converting the disk image and configuring the new VM in ESXi.

Prerequisites:

• A VirtualBox VM you wish to migrate.
• VMware ESXi host with access to the web UI.
• Sufficient storage space on your ESXi datastore.
• Access to a Windows machine (for the conversion step, if your VirtualBox is on Windows).

Step 1: Converting the VirtualBox Disk Image (.vdi to .vmdk)

VirtualBox uses the Virtual Disk Image (.vdi) format, while VMware ESXi primarily uses Virtual Machine Disk (.vmdk). We need to convert the .vdi to .vmdk.

1. Open Command Prompt (Windows):
   • If your VirtualBox installation is on Windows, open a Command Prompt as administrator.
2. Navigate to the VirtualBox Installation Directory:
   • Use the cd command to change the directory to your VirtualBox installation folder. Typically, it's located at:
     Bash

     cd "%programfiles%\Oracle\VirtualBox"
     

3. Convert the Disk Image:
   • Execute the following command, replacing "pasted\full\path\to.vdi" and "pasted\full\path\to.vmdk" with the actual paths to your .vdi file and the desired location for the converted .vmdk file:
     Bash

     VBoxManage clonemedium disk --format VMDK --variant Standard "pasted\full\path\to.vdi" "pasted\full\path\to.vmdk"
     

   • Explanation of command options:
     • VBoxManage clonemedium disk: invokes the disk cloning function.
     • --format VMDK: specifies the output format as VMDK.
     • --variant Standard: ensures compatibility with ESXi.
     • "pasted\full\path\to.vdi": input path of your virtual disk.
     • "pasted\full\path\to.vmdk": output path for the converted virtual disk.

Step 2: Creating a New VM in VMware ESXi

1. Access the ESXi Web UI:
   • Open a web browser and navigate to the IP address of your ESXi host.
   • Log in with your ESXi credentials.
2. Create a New Virtual Machine:
   • In the left navigation pane, right-click on "Virtual Machines" and select "Create/Register VM."
   • Choose "Create a new virtual machine" and click "Next."
3. Configure VM Settings:
   • Name: Enter a descriptive name for your VM.
   • Guest OS family and Guest OS version: Select the appropriate operating system family and version that matches the VirtualBox VM.
   • Click "Next."
4. Select Storage:
   • Choose the datastore where you want to store the VM's files.
   • Click "Next."
5. Customize Hardware:
   • Memory: Set the memory allocation to match the memory configured in your original VirtualBox VM.
   • Remove Default Hard Disk: Click the "X" icon next to "Hard disk 1" to remove the default virtual disk. We'll add our converted .vmdk later.
   • Click "Next".
6. Review and Finish:
   • Review the VM configuration summary.
   • Click "Finish."

Step 3: Attaching the Converted .vmdk Disk Image

1. Edit VM Settings:
   • Select the newly created VM from the list.
   • Click "Edit" to open the VM settings dialog.
2. Add Existing Hard Disk:
   • Click "Add hard disk" and select "Existing hard disk."
3. Select IDE for Type:
   • Important: select "IDE" for the controller type. This increases compatibility during the migration.
4. Upload and Select the .vmdk:
   • Browse to the appropriate datastore and folder where you want to place the .vmdk.
   • Click "Upload" in the file browser.
   • Browse to and select the converted .vmdk file from your local machine.
   • Wait for the upload to complete.
   • Select the uploaded .vmdk file.
   • Click "Select."
5. Save Changes:
   • Click "Save" in the VM Edit settings dialog.

Step 4: Power On and Verify

1. Power On the VM:
   • Power on the newly configured VM.
2. Verify Functionality:
   • Open the VM console and verify that the operating system boots correctly.
   • Test the VM to ensure all applications and services are working as expected.

Troubleshooting Tips:

• Boot Issues: If the VM fails to boot, verify the guest OS type and version settings in ESXi. Also, double check that IDE was selected for the controller type.
• Network Issues: Ensure the network adapter settings in ESXi are configured correctly.
• Driver Issues: You may need to install VMware Tools within the guest OS for optimal performance and compatibility.

Conclusion:

By following these steps, you can successfully migrate your VirtualBox VMs to VMware ESXi. Remember to back up your VMs before starting the migration process.

Disable SDWAN Mode

To disable SD-WAN mode on a Cisco 1121x router, you can use the following command:

router# controller-mode disable

Enable security license:

router(config)# license boot level securityk9 

and reload