Moving a virtual machine between ESXi hosts

migrate-vm.py

#  Built with ❤️ by Cuongitl (LE VAN CUONG)
#  Filename: migrate-vm.py
#  Modified: 2025-01-02
#  Purpose:  Moving a virtual machine between ESXi hosts
#  Reference:
#   - https://t.me/Cuongitl
# =============================================================================
import time
from pyVmomi import vim
from pyVim.connect import SmartConnect, Disconnect
import pyvmware.vmutils as vmutils
import sys
import ssl
from loguru import logger
#------------------
# Inputs:
username = "your-username"
password = "your-passwrod"
# ---
file_vms = "files/vms_vnesxi02.txt"  # a list of vms
vcenter = "vnsvcenter01"  # vCenter Server
destination_host = "vnesxi02.infra.lecuong.info"
# =============================================================================
def create_client(vcenter):
    si = None
    try:
        # Bypass SSL certificate verification
        context = ssl._create_default_https_context()
        context.check_hostname = False
        context.verify_mode = ssl.CERT_NONE
        si = SmartConnect(host=vcenter, user=username, pwd=password, port=443, sslContext=context)
    except IOError as e:
        logger.error(e)
        sys.exit()
    return si
def migrate_vm(si, vm_name, destination_host):
    esx_host = vmutils.get_host_by_name(si, destination_host)
    logger.info(esx_host)
    # Finding source VM
    vm = vmutils.get_vm_by_name(si, vm_name)
    if vm:
        logger.debug(vm)
        # relocate spec, to migrate to another host
        # this can do other things, like storage and resource pool
        # migrations
        relocate_spec = vim.vm.RelocateSpec(host=esx_host)
        # does the actual migration to host
        vm.Relocate(relocate_spec)


def load_vms(_source_vms):
    with open(_source_vms) as file:
        vms = file.read()
        vms = vms.splitlines()
        # for vm in vms:
        #     logger.warning(f"vm: {vm}")
        return vms

def vMotion_vms(vcenter, vms, destination_host):
    _client = create_client(vcenter)
    if not _client:
        logger.critical(f"Cannot initial connection to vCenter: {vcenter}")
        return

    total_vms = 0
    count = 0
    error_vms = []
    for vm in vms:
        total_vms +=1
        try:
            migrate_vm(_client, vm, destination_host)
            time.sleep(1)
            count +=1
        except BaseException as e:
            logger.error(f"Error:{e}/VM: {vm}")
            if vm not in error_vms:
                error_vms.append(vm)
            continue
    logger.info(f"moved: {count}/{total_vms}")
    # -----------
    if _client:
        Disconnect(_client)


if __name__ == "__main__":
    # ----
    # Load vms from txt file
    vms = load_vms(file_vms)
    # VMware VM Migration From One ESXi Host to Another
    vMotion_vms(vcenter, vms=vms, destination_host=destination_host)