vsphere-integrator pvc stuck in pending

With CK 1.20 and juju 2.8.9, I deployed and configured the vsphere-integrator charm like this:

https://ubuntu.com/kubernetes/docs/1.20/charm-vsphere-integrator

PVCs were getting stuck in Pending, with kubectl describe showing this Warning:

  Warning ProvisioningFailed 29m (x8 over 33m) persistentvolume-controller Failed to provision volume with StorageClass "mystorage": ServerFaultCode: Cannot complete login due to an incorrect user name or password.

I stumbled across this:

https://kb.vmware.com/s/article/67650

And (at the time), my vsphere password had a '#' in it. About 5 minutes after I quoted the password in the cloud-config.conf for apiserver and controller-manager snaps, kubectl describe showed this:

  Normal ProvisioningSucceeded 28m persistentvolume-controller Successfully provisioned volume pvc-377d28be-7d28-479f-9052-43b159cc0ae9 using kubernetes.io/vsphere-volume

The k8s-master charm should quote the password when creating the conf.