mirror of
https://github.com/outbackdingo/patroni.git
synced 2026-08-25 14:53:37 +00:00
Alexander KukushkinandGitHub
03c2a85d23
It is very easy to get current timeline on the master by executing
```sql
SELECT ('x' || SUBSTR(pg_walfile_name(pg_current_wal_lsn()), 1, 8))::bit(32)::int
```
Unfortunately the same method doesn't work when postgres is_in_recovery. Therefore we will use replication connection for that on the replicas. In order to avoid opening and closing replication connection on every HA loop we will cache the result if its value matches with the timeline of the master.
Also this PR introduces a new key in DCS: `/history`. It will contain a json serialized object with timeline history in a format similar to the usual history files. The differences are:
* Second column is the absolute wal position in bytes, instead of LSN
* Optionally there might be a fourth column - timestamp, (mtime of history file)
107 lines
5.0 KiB
Python
107 lines
5.0 KiB
Python
import unittest
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from mock import Mock, patch
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from patroni.dcs.kubernetes import Kubernetes, KubernetesError, k8s_client, k8s_watch
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def mock_list_namespaced_config_map(self, *args, **kwargs):
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metadata = {'resource_version': '1', 'labels': {'f': 'b'}, 'name': 'test-config',
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'annotations': {'initialize': '123', 'config': '{}'}}
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items = [k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata))]
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metadata.update({'name': 'test-leader', 'annotations': {'optime': '1234', 'leader': 'p-0', 'ttl': '30s'}})
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items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
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metadata.update({'name': 'test-failover', 'annotations': {'leader': 'p-0'}})
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items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
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metadata.update({'name': 'test-sync', 'annotations': {'leader': 'p-0'}})
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items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
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metadata = k8s_client.V1ObjectMeta(resource_version='1')
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return k8s_client.V1ConfigMapList(metadata=metadata, items=items)
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def mock_list_namespaced_pod(self, *args, **kwargs):
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metadata = k8s_client.V1ObjectMeta(resource_version='1', name='p-0', annotations={'status': '{}'})
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items = [k8s_client.V1Pod(metadata=metadata)]
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return k8s_client.V1PodList(items=items)
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@patch.object(k8s_client.CoreV1Api, 'patch_namespaced_config_map', Mock())
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@patch.object(k8s_client.CoreV1Api, 'create_namespaced_config_map', Mock())
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class TestKubernetes(unittest.TestCase):
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@patch('kubernetes.config.load_kube_config', Mock())
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@patch.object(k8s_client.CoreV1Api, 'list_namespaced_config_map', mock_list_namespaced_config_map)
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@patch.object(k8s_client.CoreV1Api, 'list_namespaced_pod', mock_list_namespaced_pod)
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def setUp(self):
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self.k = Kubernetes({'ttl': 30, 'scope': 'test', 'name': 'p-0', 'retry_timeout': 10, 'labels': {'f': 'b'}})
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with patch('time.time', Mock(return_value=1)):
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self.k.get_cluster()
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@patch.object(k8s_client.CoreV1Api, 'list_namespaced_config_map', mock_list_namespaced_config_map)
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@patch.object(k8s_client.CoreV1Api, 'list_namespaced_pod', mock_list_namespaced_pod)
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def test_get_cluster(self):
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self.k.get_cluster()
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with patch.object(k8s_client.CoreV1Api, 'list_namespaced_pod', Mock(side_effect=Exception)):
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self.assertRaises(KubernetesError, self.k.get_cluster)
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@patch('kubernetes.config.load_kube_config', Mock())
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@patch.object(k8s_client.CoreV1Api, 'create_namespaced_endpoints', Mock())
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def test_update_leader(self):
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k = Kubernetes({'ttl': 30, 'scope': 'test', 'name': 'p-0', 'retry_timeout': 10,
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'labels': {'f': 'b'}, 'use_endpoints': True, 'pod_ip': '10.0.0.0'})
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self.assertIsNotNone(k.update_leader('123'))
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def test_take_leader(self):
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self.k.take_leader()
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self.k._leader_observed_record['leader'] = 'test'
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self.k.patch_or_create = Mock(return_value=False)
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self.k.take_leader()
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def test_manual_failover(self):
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self.k.manual_failover('foo', 'bar')
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def test_set_config_value(self):
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self.k.set_config_value('{}')
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@patch.object(k8s_client.CoreV1Api, 'patch_namespaced_pod', Mock(return_value=True))
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def test_touch_member(self):
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self.k.touch_member({})
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self.k._name = 'p-1'
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self.k.touch_member({'state': 'running', 'role': 'replica'})
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self.k.touch_member({'state': 'stopped', 'role': 'master'})
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def test_initialize(self):
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self.k.initialize()
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def test_delete_leader(self):
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self.k.delete_leader()
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def test_cancel_initialization(self):
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self.k.cancel_initialization()
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@patch.object(k8s_client.CoreV1Api, 'delete_collection_namespaced_config_map',
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Mock(side_effect=k8s_client.rest.ApiException(500, '')))
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def test_delete_cluster(self):
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self.k.delete_cluster()
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@patch('kubernetes.config.load_kube_config', Mock())
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@patch.object(k8s_client.CoreV1Api, 'create_namespaced_endpoints',
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Mock(side_effect=[k8s_client.rest.ApiException(502, ''), k8s_client.rest.ApiException(500, '')]))
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def test_delete_sync_state(self):
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k = Kubernetes({'ttl': 30, 'scope': 'test', 'name': 'p-0', 'retry_timeout': 10,
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'labels': {'f': 'b'}, 'use_endpoints': True, 'pod_ip': '10.0.0.0'})
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self.assertFalse(k.delete_sync_state())
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def test_watch(self):
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self.k.set_ttl(10)
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self.k.watch(None, 0)
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self.k.watch(None, 0)
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with patch.object(k8s_watch.Watch, 'stream',
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Mock(side_effect=[Exception, [], KeyboardInterrupt,
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[{'raw_object': {'metadata': {'resourceVersion': '2'}}}]])):
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self.assertFalse(self.k.watch('1', 2))
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self.assertRaises(KeyboardInterrupt, self.k.watch, '1', 2)
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self.assertTrue(self.k.watch('1', 2))
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def test_set_history_value(self):
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self.k.set_history_value('{}')
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