Problem:
set http_proxy, https_proxy, and no_proxy env variables:
export no_proxy="your_kubecluster"
export http_proxy="your_http_proxy:3128"
export HTTPS_PROXY="your_https_proxy:3128"

Attempt to use magnum_cluster_api to connect to the management cluster to build a new workload cluster and you will see an error like:

2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall [-] Fixed interval looping call 'magnum.service.periodic.ClusterUpdateJob.update_status' failed: RuntimeError: configured proxy http://10.33.124.130:3128/ requires the disabled feature "kube/http-proxy" 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall Traceback (most recent call last): 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib64/python3.11/site-packages/oslo_service/loopingcall.py", line 150, in _run_loop 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall result = func(*self.args, **self.kw) 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall ^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib64/python3.11/site-packages/magnum/service/periodic.py", line 72, in update_status 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall cdriver = driver.Driver.get_driver_for_cluster(self.ctx, self.cluster) 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib64/python3.11/site-packages/magnum/drivers/common/driver.py", line 165, in get_driver_for_cluster 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall return cls.get_driver(ct.server_type, ct.cluster_distro, ct.coe, 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib64/python3.11/site-packages/magnum/drivers/common/driver.py", line 125, in get_driver 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall definition_map = cls.get_drivers() 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall ^^^^^^^^^^^^^^^^^ 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib64/python3.11/site-packages/magnum/drivers/common/driver.py", line 79, in get_drivers 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall for cluster_type in def_class().provides: 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall ^^^^^^^^^^^ 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib64/python3.11/site-packages/magnum_cluster_api/driver.py", line 52, in __init__ 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall magnum_cluster_api.Driver("magnum-system", resources.CLUSTER_CLASS_NAME) 2025-09-02 16:53:45.847 7 ERROR oslo.service.loopingcall RuntimeError: configured proxy http://<your proxy>:3128/ requires the disabled feature "kube/http-proxy"

This appears to be related to commit: 5c6ee47

Updating Cargo.toml to include http-proxy feature for kube:

kube = { version = "0.99.0", features = ["runtime", "derive", "http-proxy"] }

and rebuilding the python package and bundled rust drivers, fixes this specific error and attempts to use the configured proxy via the env varriables.

The issue is that the no_proxy env variables are no longer respected. So it will force the use of the proxy for everything, even if the management cluster in in the no_proxy list.