kube generic: use cdn url

Author: karmab

kvirt/cluster/kubeadm/__init__.py

@@ -189,7 +189,7 @@ def create(config, plandir, cluster, overrides):
             if version is None:
                 msg = f"Invalid version {original_version}"
                 return {'result': 'failure', 'reason': msg}
-    kube_version = version or urlopen('https://dl.k8s.io/release/stable.txt').read().decode()
+    kube_version = version or urlopen('https://cdn.dl.k8s.io/release/stable.txt').read().decode()
     if not kube_version.startswith('v'):
         kube_version = f'v{kube_version}'
     pprint(f"Using version {kube_version}")

kvirt/cluster/kubeadm/pre_el.sh

@@ -1,4 +1,4 @@
-VERSION={{ version or "$(curl -L -s https://dl.k8s.io/release/stable.txt)" }}
+VERSION={{ version or "$(curl -sL https://cdn.dl.k8s.io/release/stable.txt)" }}
 # Ensure the version is in the format v<major>.<minor> regardless of the source
 VERSION=$(echo "v${VERSION#v}" | cut -d. -f1,2)