ci: run jobs with Kubernetes 1.21

Kubernetes 1.21 is the latest stable release, and Ceph-CSI should be
tested with that. Currently 1.19 is still supported too, so we will need
to run the CI jobs with 1.19, 1.20 and 1.21.

See-also: https://kubernetes.io/releases/
Signed-off-by: Niels de Vos <ndevos@redhat.com>

jobs/k8s-e2e-external-storage.yaml

@@ -3,9 +3,9 @@
     name: k8s-e2e-external-storage
     k8s_version:
       - '1.20':
-          only_run_on_request: false
-      - '1.21':
           only_run_on_request: true
+      - '1.21':
+          only_run_on_request: false
     jobs:
       - 'k8s-e2e-external-storage-{k8s_version}'
 

jobs/mini-e2e.yaml

@@ -7,7 +7,7 @@
       - '1.20':
           only_run_on_request: false
       - '1.21':
-          only_run_on_request: true
+          only_run_on_request: false
     jobs:
       - 'mini-e2e_k8s-{k8s_version}'
       - 'mini-e2e-helm_k8s-{k8s_version}'

jobs/upgrade-tests.yaml

@@ -1,7 +1,7 @@
 ---
 - project:
     name: upgrade-tests
-    k8s_version: '1.20'
+    k8s_version: '1.21'
     test_type:
       - 'cephfs'
       - 'rbd'