The azure cloudprovider will now use the Managed Service Identity
to retrieve access tokens for the Azure ARM APIs, rather than
requiring hard-coded, user-specified credentials.
Automatic merge from submit-queue (batch tested with PRs 48594, 47042, 48801, 48641, 48243)
Add initial support for the Azure instance metadata service.
Part of fixing #46632
@colemickens @rootfs @jdumars @kris-nova
- leveraging Config struct (—cloud-config) to store backoff and rate limit on/off and performance configuration
- added add’l error logging
- enabled backoff for vm GET requests
An initial attempt at engaging exponential backoff for API error responses.
Uses k8s.io/client-go/util/flowcontrol; implementation inspired by GCE
cloudprovider backoff.
The default polling delay of 1 minute results in very long delays when
an Azure Disk is attached to a node. It gets worse as go-autorest
doubles the default delay to 2 minutes.
Please see: https://github.com/kubernetes/kubernetes/issues/35180#issuecomment-273085063
Only the PollingDelay for VirtualMachinesClient is modified here to
avoid too much pressure on Azure quotas.
