add one more e2e test case
This commit is contained in:
Felix Kunde
parent
2e57d553f9
commit
0a35da0a51
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@ -280,12 +280,8 @@ class K8s:
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return None
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return pod.items[0].spec.containers[0].image
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def get_cluster_leader_pod(self, pg_cluster_name, namespace='default'):
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labels = {
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'application': 'spilo',
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'cluster-name': pg_cluster_name,
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'spilo-role': 'master',
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}
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def get_cluster_pod(self, role, labels='application=spilo,cluster-name=acid-minimal-cluster', namespace='default'):
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labels = labels + ',spilo-role=' + role
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pods = self.api.core_v1.list_namespaced_pod(
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namespace, label_selector=to_selector(labels)).items
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@ -293,6 +289,12 @@ class K8s:
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if pods:
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return pods[0]
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def get_cluster_leader_pod(self, labels='application=spilo,cluster-name=acid-minimal-cluster', namespace='default'):
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return self.get_cluster_pod('master', labels, namespace)
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def get_cluster_replica_pod(self, labels='application=spilo,cluster-name=acid-minimal-cluster', namespace='default'):
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return self.get_cluster_pod('replica', labels, namespace)
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class K8sBase:
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'''
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@ -334,7 +334,7 @@ class EndToEndTestCase(unittest.TestCase):
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# credentials.
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dbList = []
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leader = k8s.get_cluster_leader_pod('acid-minimal-cluster')
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leader = k8s.get_cluster_leader_pod()
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dbListQuery = "select datname from pg_database"
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schemasQuery = """
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select schema_name
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@ -773,7 +773,7 @@ class EndToEndTestCase(unittest.TestCase):
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# get nodes of master and replica(s) (expected target of new master)
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_, replica_nodes = k8s.get_pg_nodes(cluster_label)
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# rolling update annotation
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# rolling update annotation
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flag = {
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"metadata": {
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"annotations": {
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@ -782,25 +782,115 @@ class EndToEndTestCase(unittest.TestCase):
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}
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}
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podsList = k8s.api.core_v1.list_namespaced_pod('default', label_selector=cluster_label)
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for pod in podsList.items:
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# add flag only to the master to make it appear to the operator as a leftover from a rolling update
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if pod.metadata.labels.get('spilo-role') == 'master':
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try:
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podsList = k8s.api.core_v1.list_namespaced_pod('default', label_selector=cluster_label)
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for pod in podsList.items:
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# add flag only to the master to make it appear to the operator as a leftover from a rolling update
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if pod.metadata.labels.get('spilo-role') == 'master':
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old_creation_timestamp = pod.metadata.creation_timestamp
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k8s.patch_pod(flag, pod.metadata.name, pod.metadata.namespace)
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# operator will perform a switchover to an existing replica before recreating the master pod
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else:
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switchover_target = pod.metadata.name
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# do not wait until the next sync
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k8s.delete_operator_pod()
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# operator should now recreate the master pod and do a switchover before
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k8s.wait_for_pod_failover(replica_nodes, 'spilo-role=master,' + cluster_label)
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# check if the former replica is now the new master
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leader = k8s.get_cluster_leader_pod()
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self.eventuallyEqual(lambda: leader.metadata.name, switchover_target, "Rolling update flag did not trigger switchover")
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# check that the old master has been recreated
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k8s.wait_for_pod_start('spilo-role=replica,' + cluster_label)
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replica = k8s.get_cluster_replica_pod()
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self.eventuallyTrue(replica.metadata.creation_timestamp > old_creation_timestamp, "Old master pod was not recreated")
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except timeout_decorator.TimeoutError:
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print('Operator log: {}'.format(k8s.get_operator_log()))
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raise
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@timeout_decorator.timeout(TEST_TIMEOUT_SEC)
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def test_rolling_update_label_timeout(self):
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'''
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Simulate case when replica does not receive label in time and rolling update does not finish
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'''
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k8s = self.k8s
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cluster_label = 'application=spilo,cluster-name=acid-minimal-cluster'
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# verify we are in good state from potential previous tests
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self.eventuallyEqual(lambda: k8s.count_running_pods(), 2, "No 2 pods running")
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# get nodes of master and replica(s) (expected target of new master)
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_, replica_nodes = k8s.get_pg_nodes(cluster_label)
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# rolling update annotation
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flag = {
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"metadata": {
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"annotations": {
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"zalando-postgres-operator-rolling-update-required": "true",
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}
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}
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}
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# make pod_label_wait_timeout so short that rolling update fails on first try
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# temporarily lower resync interval to simulate that pods get healthy in between SYNCs
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patch_resync_config = {
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"data": {
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"pod_label_wait_timeout": "2s",
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"resync_period": "20s",
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}
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}
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try:
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# patch both pods for rolling update
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podsList = k8s.api.core_v1.list_namespaced_pod('default', label_selector=cluster_label)
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for pod in podsList.items:
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k8s.patch_pod(flag, pod.metadata.name, pod.metadata.namespace)
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# operator will perform a switchover to an existing replica before recreating the master pod
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else:
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switchover_target = pod.metadata.name
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if pod.metadata.labels.get('spilo-role') == 'replica':
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switchover_target = pod.metadata.name
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# do not wait until the next sync
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k8s.delete_operator_pod()
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# update config and restart operator
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k8s.update_config(patch_resync_config, "update resync interval and pod_label_wait_timeout")
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# operator should now recreate the master pod and do a switchover before
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k8s.wait_for_pod_failover(replica_nodes, 'spilo-role=master,' + cluster_label)
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k8s.wait_for_pod_start('spilo-role=replica,' + cluster_label)
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# operator should now recreate the replica pod first and do a switchover after
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k8s.wait_for_pod_start('spilo-role=replica,' + cluster_label)
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# check if the former replica is now the new master
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leader = k8s.get_cluster_leader_pod('acid-minimal-cluster')
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self.eventuallyEqual(lambda: leader.metadata.name, switchover_target, "Rolling update flag did not trigger switchover")
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# pod_label_wait_timeout should have been exceeded hence the rolling update is continued on next sync
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# check if the cluster state is "SyncFailed"
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self.eventuallyEqual(lambda: k8s.pg_get_status(), "SyncFailed", "Expected SYNC event to fail")
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# wait for next sync, replica should be running normally by now and be ready for switchover
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time.sleep(10)
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k8s.wait_for_pod_failover(replica_nodes, 'spilo-role=master,' + cluster_label)
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# check if the former replica is now the new master
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leader = k8s.get_cluster_leader_pod()
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self.eventuallyEqual(lambda: leader.metadata.name, switchover_target, "Rolling update flag did not trigger switchover")
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# wait for the old master to get restarted
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k8s.wait_for_pod_start('spilo-role=replica,' + cluster_label)
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# status should again be "SyncFailed" but turn into "Running" on the next sync
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time.sleep(10)
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self.eventuallyEqual(lambda: k8s.pg_get_status(), "Running", "Expected running cluster after two syncs")
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# revert config changes
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patch_resync_config = {
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"data": {
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"pod_label_wait_timeout": "10m",
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"resync_period": "30m",
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}
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}
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k8s.update_config(patch_resync_config, "revert resync interval and pod_label_wait_timeout")
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except timeout_decorator.TimeoutError:
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print('Operator log: {}'.format(k8s.get_operator_log()))
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raise
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@timeout_decorator.timeout(TEST_TIMEOUT_SEC)
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def test_zz_node_readiness_label(self):
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