19305 Kubernetes: Support for version 1.33

With this release of Checkmk, we introduce support for version 1.33 of Kubernetes.
The supported versions are listed below:

Checkmk 2.3: 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30, 1.31 (no change)
Checkmk 2.4: 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33
Checkmk 2.5: 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33

The list of supported versions may not apply to future patch versions. For such cases, a
new werk will be released.

-- End of Werk text --

CMK-24090
CMK-24299
SUP-27648

Change-Id: I9f04decd84731dd18e1eeb2a27a5f7e82e59c26d

Author: relrod

.werks/19305.md

@@ -0,0 +1,24 @@
+[//]: # (werk v2)
+# Kubernetes: Support for version 1.33
+
+key        | value
+---------- | ---
+date       | 2026-02-13T19:47:40+00:00
+version    | 2.4.0p22
+class      | feature
+edition    | cre
+component  | checks
+level      | 1
+compatible | yes
+
+With this release of Checkmk, we introduce support for version 1.33 of Kubernetes.
+
+The supported versions are listed below:
+
+Checkmk 2.3: 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30, 1.31 (no change)
+Checkmk 2.4: 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33
+Checkmk 2.5: 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33
+
+The list of supported versions may not apply to future patch versions.
+
+For such cases, a new werk will be released.

cmk/plugins/kube/api_server.py

@@ -41,7 +41,7 @@
 
 LOGGER = logging.getLogger()
 VERSION_MATCH_RE = re.compile(r"\s*v?([0-9]+(?:\.[0-9]+)*).*")
-SUPPORTED_VERSIONS = [(1, 26), (1, 27), (1, 28), (1, 29), (1, 30), (1, 31), (1, 32)]
+SUPPORTED_VERSIONS = [(1, 26), (1, 27), (1, 28), (1, 29), (1, 30), (1, 31), (1, 32), (1, 33)]
 # PM decision: LOWEST_FUNCTIONING_VERSION is incremented, if an issue is reported by a customer.
 # Otherwise, we try not change anything in monitoring (despite lack of support).
 LOWEST_FUNCTIONING_VERSION = (1, 21)

tests/unit/cmk/plugins/kube/utils_kubernetes/test_api_server.py

@@ -38,7 +38,9 @@ def _core_api() -> CoreAPI:
 
 
 CALL_API = "cmk.plugins.kube.api_server.send_request"
-SUPPORTED_VERSION_STR = "Supported versions are v1.26, v1.27, v1.28, v1.29, v1.30, v1.31, v1.32."
+SUPPORTED_VERSION_STR = (
+    "Supported versions are v1.26, v1.27, v1.28, v1.29, v1.30, v1.31, v1.32, v1.33."
+)
 
 
 def test_raw_api_get_healthz_ok(core_api: CoreAPI) -> None:
@@ -290,8 +292,12 @@ def test_decompose_git_version(
         ),
         (
             api.KubernetesVersion(git_version=api.GitVersion("v1.33.0"), major=1, minor=33),
+            [],
+        ),
+        (
+            api.KubernetesVersion(git_version=api.GitVersion("v1.34.0"), major=1, minor=34),
             [
-                "WARNING Unsupported Kubernetes version 'v1.33.0'. " + SUPPORTED_VERSION_STR,
+                "WARNING Unsupported Kubernetes version 'v1.34.0'. " + SUPPORTED_VERSION_STR,
                 "WARNING Processing data is done on a best effort basis.",
             ],
         ),