[tune/release] Do not use spot instances in k8s tests (#27250)

Spot instances are not being booted up, so let's go without them.

Signed-off-by: Kai Fricke <kai@anyscale.com>

python/ray/tune/utils/util.py

@@ -157,7 +157,9 @@ def _get_checkpoint_from_remote_node(
         )
         return None
     fut = _serialize_checkpoint.options(
-        resources={f"node:{node_ip}": 0.01}, num_cpus=0
+        resources={f"node:{node_ip}": 0.01},
+        num_cpus=0,
+        scheduling_strategy="DEFAULT",
     ).remote(checkpoint_path)
     try:
         checkpoint_data = ray.get(fut, timeout=timeout)

release/tune_tests/cloud_tests/tpl_gcp_k8s_4x8.yaml

@@ -12,4 +12,4 @@ worker_node_types:
       instance_type: n2-standard-8
       min_workers: 3
       max_workers: 3
-      use_spot: true
+      use_spot: false

release/tune_tests/cloud_tests/workloads/run_cloud_test.py

@@ -99,11 +99,11 @@ class TrialStub:
 
     @property
     def hostname(self):
-        return self.last_result["hostname"]
+        return self.last_result.get("hostname")
 
     @property
     def node_ip(self):
-        return self.last_result["node_ip"]
+        return self.last_result.get("node_ip")
 
     @property
     def dirname(self):