Using govc to add ExtraConfig setting to a virtual machine in VSphere.

environment.sh

export GOVC_URL=''
export GOVC_USERNAME=''
export GOVC_PASSWORD=''
# Disabled. Only use if TLS is completely broken.
# export GOVC_INSECURE=1
export GOVC_TLS_CA_CERTS=$(ruby -ropenssl -e 'puts OpenSSL::X509::DEFAULT_CERT_FILE' 2>/dev/null)

script.sh

while read vm; do
  govc vm.power -s -vm.dns=${vm} && govc vm.power -off -vm.dns=${vm}
  govc vm.change -e 'mem.hotadd=true' -e 'vcpu.hotadd=true' -vm.dns=${vm}
  govc vm.change -c 2-vm.dns=${vm}
  govc vm.power -on -vm.dns=${vm}
  govc vm.info -vm.dns=${dns} -json | jq -r '.VirtualMachines[].Config.ExtraConfig[] | select(.Key | contains("hotadd"))'
  read -p "Next? " -n 1 -r answer && [[ $answer =~ ^[Yy]$ ]] || break && echo
done < list.txt