91 lines
3.6 KiB
Python
Executable File
91 lines
3.6 KiB
Python
Executable File
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import unittest, yaml, time
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from kubernetes import client, config, utils
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from pprint import pprint
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import timeout_decorator
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import subprocess
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class SmokeTestCase(unittest.TestCase):
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'''
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Test the most basic e2e functionality of the operator.
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'''
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@classmethod
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def setUpClass(cls):
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'''
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Deploy operator to a "kind" cluster created by /e2e/run.sh using examples from /manifests.
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This operator deployment is to be shared among all tests.
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/e2e/run.sh deletes the 'kind' cluster after successful run along with all operator-related entities.
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In the case of test failure the cluster will stay to enable manual examination;
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next invocation of "make e2e" will re-create it.
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'''
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_ = config.load_kube_config()
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k8s_client = client.ApiClient()
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# HACK
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# 1. creating RBAC entites with a separate client fails with "AttributeError: object has no attribute 'select_header_accept'"
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# 2. utils.create_from_yaml cannot create multiple entites from a single file
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subprocess.run(["kubectl", "create", "-f", "manifests/operator-service-account-rbac.yaml"])
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for filename in ["configmap.yaml", "postgres-operator.yaml"]:
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path = "manifests/" + filename
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utils.create_from_yaml(k8s_client, path)
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v1 = client.CoreV1Api()
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pod_phase = None
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while pod_phase != 'Running':
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pods = v1.list_namespaced_pod('default', label_selector='name=postgres-operator').items
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if pods:
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operator_pod = pods[0]
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pod_phase = operator_pod.status.phase
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print("Waiting for the operator pod to start. Current phase of pod lifecycle: " + str(pod_phase))
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time.sleep(5)
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k8s_client = client.ApiClient()
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# HACK around the lack of Python client for the acid.zalan.do resource
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subprocess.run(["kubectl", "create", "-f", "manifests/minimal-postgres-manifest.yaml"])
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pod_phase = 'None'
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while pod_phase != 'Running':
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pods = v1.list_namespaced_pod('default', label_selector='spilo-role=master').items
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if pods:
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operator_pod = pods[0]
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pod_phase = operator_pod.status.phase
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print("Waiting for the Spilo master pod to start. Current phase: " + str(pod_phase))
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time.sleep(5)
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@timeout_decorator.timeout(60)
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def test_master_is_unique(self):
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"""
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Check that there is a single pod in the k8s cluster with the label "spilo-role=master".
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"""
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_ = config.load_kube_config()
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v1 = client.CoreV1Api()
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master_pods = v1.list_namespaced_pod('default', label_selector='spilo-role=master,version=acid-minimal-cluster').items
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self.assertEqual(len(master_pods), 1, "Expected 1 master pod,found " + str(len(master_pods)))
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@timeout_decorator.timeout(60)
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def test_scaling(self):
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"""
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Scale up from 2 to 3 pods and back to 2 by updating the Postgres manifest at runtime.
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"""
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_ = config.load_kube_config()
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crd_api = client.CustomObjectsApi()
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v1 = client.CoreV1Api()
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body = {
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"spec": {
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"numberOfInstances": 3
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}
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}
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_ = crd_api.patch_namespaced_custom_object("acid.zalan.do", "v1", "default", "postgresqls", "acid-minimal-cluster", body)
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while len(v1.list_namespaced_pod('default', label_selector='version=acid-minimal-cluster').items) != 3:
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print("Waiting for the cluster to scale up to 3 podes.")
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time.sleep(5)
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if __name__ == '__main__':
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unittest.main() |