We are using an old-style attribute declaration here because otherwise it is not possible to override \\__new\\__ method. Without it the _workers_ by default gets always the same  https://docs.python.org/3/library/stdtypes.html#dict[`+dict+`] object that could be mutated.
+
Consists of the following fields:
+
Variables:;;
+
_property \\___permanent_logical_slots_:  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]]_link:#patroni.dcs.Cluster.\\__permanent_logical_slots[];;
  Dictionary of permanent `+logical+` replication slots.
+
_property \\___permanent_physical_slots_:  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]]_link:#patroni.dcs.Cluster.\\__permanent_physical_slots[];;
  Dictionary of permanent `+physical+` replication slots.
+
_property \\___permanent_slots_:  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]] |  https://docs.python.org/3/library/typing.html#typing.Any[Any]]_link:#patroni.dcs.Cluster.\\__permanent_slots[];;
  Dictionary of permanent replication slots with their known LSN.
+
_get_members_slots(_my_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _role:  https://docs.python.org/3/library/stdtypes.html#str[str]_) →  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/stdtypes.html#str[str]]] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1144-L1185[View on GitHub]link:#patroni.dcs.Cluster._get_members_slots[];;
  Get physical replication slots configuration for members that sourcing from this node.
  +
  If the `+replicatefrom+` tag is set on the member - we should not create the replication slot for it on the current primary, because that member would replicate from elsewhere. We still create the slot if the `+replicatefrom+` destination member is currently not a member of the cluster (fallback to the primary), or if `+replicatefrom+` destination member happens to be the current primary.
  +
  Will log an error if:
  +
  \\__\\__
  \\__\\__
  +
  Parameters:::
  Returns:::
    dictionary of physical replication slots that should exist on a given node.
+
_get_permanent_slots(_*_, _is_standby_cluster:  https://docs.python.org/3/library/functions.html#bool[bool]_, _role:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _nofailover:  https://docs.python.org/3/library/functions.html#bool[bool]_, _major_version:  https://docs.python.org/3/library/functions.html#int[int]_) →  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1113-L1142[View on GitHub]link:#patroni.dcs.Cluster._get_permanent_slots[];;
  Get configured permanent replication slots.
  +
  Note

Permanent replication slots are only considered if `+use_slots+` configuration is enabled. A node that is not supposed to become a leader (_nofailover_) will not have permanent replication slots.

In a standby cluster we only support physical replication slots.

  The returned dictionary for a non-standby cluster always contains permanent logical replication slots in order to show a warning if they are not supported by PostgreSQL before v11.
  +
  Parameters:::
  Returns:::
    dictionary of permanent slot names mapped to attributes.
+
_has_permanent_logical_slots(_my_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _nofailover:  https://docs.python.org/3/library/functions.html#bool[bool]_) →  https://docs.python.org/3/library/functions.html#bool[bool] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1232-L1241[View on GitHub]link:#patroni.dcs.Cluster._has_permanent_logical_slots[];;
  Check if the given member node has permanent `+logical+` replication slots configured.
  +
  Parameters:::
  Returns:::
    `+True+` if any detected replications slots are `+logical+`, otherwise `+False+`.
+
_merge_permanent_slots(_slots:  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/stdtypes.html#str[str]]]_, _permanent_slots:  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]]_, _my_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _major_version:  https://docs.python.org/3/library/functions.html#int[int]_) →  https://docs.python.org/3/library/typing.html#typing.List[List][ https://docs.python.org/3/library/stdtypes.html#str[str]] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1065-L1111[View on GitHub]link:#patroni.dcs.Cluster._merge_permanent_slots[];;
  Merge replication _slots_ for members with _permanent_slots_.
  +
  Perform validation of configured permanent slot name, skipping invalid names.
  +
  Will update _slots_ in-line based on `+type+` of slot, `+physical+` or `+logical+`, and name of node. Type is assumed to be `+physical+` if there are no attributes stored as the slot value.
  +
  Parameters:::
  Returns:::
    List of disabled permanent, logical slot names, if postgresql version < 11.
+
_static _empty() → link:#patroni.dcs.Cluster[Cluster] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L892-L895[View on GitHub]link:#patroni.dcs.Cluster.empty[];;
  Produce an empty link:#patroni.dcs.Cluster[`+Cluster+`] instance.
+
filter_permanent_slots(_slots:  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/functions.html#int[int]]_, _is_standby_cluster:  https://docs.python.org/3/library/functions.html#bool[bool]_, _major_version:  https://docs.python.org/3/library/functions.html#int[int]_) →  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/functions.html#int[int]] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1208-L1230[View on GitHub]link:#patroni.dcs.Cluster.filter_permanent_slots[];;
  Filter out all non-permanent slots from provided _slots_ dict.
  +
  Parameters:::
  Returns:::
    a  https://docs.python.org/3/library/stdtypes.html#dict[`+dict+`] object that contains only slots that are known to be permanent.
+
get_clone_member(_exclude_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_) → link:#patroni.dcs.Member[Member] | link:#patroni.dcs.Leader[Leader] |  https://docs.python.org/3/library/constants.html#None[None] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L961-L972[View on GitHub]link:#patroni.dcs.Cluster.get_clone_member[];;
  Get member or leader object to use as clone source.
  +
  Parameters:::
    *exclude_name* – name of a member name to exclude.
  Returns:::
    a randomly selected candidate member from available running members that are configured to as viable sources for cloning (has tag `+clonefrom+` in configuration). If no member is appropriate the current leader is used.
+
get_member(_member_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _fallback_to_leader:  https://docs.python.org/3/library/functions.html#bool[bool] = True_) → link:#patroni.dcs.Member[Member] | link:#patroni.dcs.Leader[Leader] |  https://docs.python.org/3/library/constants.html#None[None] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L950-L959[View on GitHub]link:#patroni.dcs.Cluster.get_member[];;
  Get link:#patroni.dcs.Member[`+Member+`] object by name or the link:#patroni.dcs.Leader[`+Leader+`].
  +
  Parameters:::
  Returns:::
    the link:#patroni.dcs.Member[`+Member+`] if found or link:#patroni.dcs.Leader[`+Leader+`] object.
+
get_my_slot_name_on_primary(_my_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _replicatefrom:  https://docs.python.org/3/library/stdtypes.html#str[str] |  https://docs.python.org/3/library/constants.html#None[None]_) →  https://docs.python.org/3/library/stdtypes.html#str[str] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1263-L1279[View on GitHub]link:#patroni.dcs.Cluster.get_my_slot_name_on_primary[];;
  Canonical slot name for physical replication.
  +
  Note

P <– I <– L

  In case of cascading replication we have to check not our physical slot, but slot of the replica that connects us to the primary.
  +
  Parameters:::
  Returns:::
    The slot name that is in use for physical replication on this no`de.
+
get_replication_slots(_my_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _role:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _nofailover:  https://docs.python.org/3/library/functions.html#bool[bool]_, _major_version:  https://docs.python.org/3/library/functions.html#int[int]_, _*_, _is_standby_cluster:  https://docs.python.org/3/library/functions.html#bool[bool] = False_, _show_error:  https://docs.python.org/3/library/functions.html#bool[bool] = False_) →  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]]] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1033-L1063[View on GitHub]link:#patroni.dcs.Cluster.get_replication_slots[];;
  Lookup configured slot names in the DCS, report issues found and merge with permanent slots.
  +
  Will log an error if:
  +
  \\__\\__
  \\__\\__
  +
  Parameters:::
  Returns:::
    final dictionary of slot names, after merging with permanent slots and performing sanity checks.
+
has_member(_member_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_) →  https://docs.python.org/3/library/functions.html#bool[bool] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L941-L948[View on GitHub]link:#patroni.dcs.Cluster.has_member[];;
  Check if the given member name is present in the cluster.
  +
  Parameters:::
    *member_name* – name to look up in the `+members+`.
  Returns:::
    `+True+` if the member name is found.
+
has_permanent_slots(_my_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _*_, _is_standby_cluster:  https://docs.python.org/3/library/functions.html#bool[bool] = False_, _nofailover:  https://docs.python.org/3/library/functions.html#bool[bool] = False_, _major_version:  https://docs.python.org/3/library/functions.html#int[int] = 110000_) →  https://docs.python.org/3/library/functions.html#bool[bool] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1187-L1206[View on GitHub]link:#patroni.dcs.Cluster.has_permanent_slots[];;
  Check if the given member node has permanent replication slots configured.
  +
  Parameters:::
  Returns:::
    `+True+` if there are permanent replication slots configured, otherwise `+False+`.
+
is_empty() https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L897-L904[View on GitHub]link:#patroni.dcs.Cluster.is_empty[];;
  Validate definition of all attributes of this link:#patroni.dcs.Cluster[`+Cluster+`] instance.
  +
  Returns:::
    `+True+` if all attributes of the current link:#patroni.dcs.Cluster[`+Cluster+`] are unpopulated.
+
_static _is_logical_slot(_value:  https://docs.python.org/3/library/typing.html#typing.Any[Any] |  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]]_) →  https://docs.python.org/3/library/functions.html#bool[bool] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L984-L994[View on GitHub]link:#patroni.dcs.Cluster.is_logical_slot[];;
  Check whether provided configuration is for permanent logical replication slot.
  +
  Parameters:::
    *value* – configuration of the permanent replication slot.
  Returns:::
    `+True+` if _value_ is a logical replication slot, otherwise `+False+`.
+
_static _is_physical_slot(_value:  https://docs.python.org/3/library/typing.html#typing.Any[Any] |  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/typing.html#typing.Any[Any]]_) →  https://docs.python.org/3/library/functions.html#bool[bool] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L974-L982[View on GitHub]link:#patroni.dcs.Cluster.is_physical_slot[];;
  Check whether provided configuration is for permanent physical replication slot.
  +
  Parameters:::
    *value* – configuration of the permanent replication slot.
  Returns:::
    `+True+` if _value_ is a physical replication slot, otherwise `+False+`.
+
is_unlocked() →  https://docs.python.org/3/library/functions.html#bool[bool] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L934-L939[View on GitHub]link:#patroni.dcs.Cluster.is_unlocked[];;
  Check if the cluster does not have the leader.
  +
  Returns:::
    `+True+` if a leader name is not defined.
+
_property _last_lsn_:  https://docs.python.org/3/library/functions.html#int[int]_link:#patroni.dcs.Cluster.last_lsn[];;
  Last known leader LSN.
+
_property _leader_name_:  https://docs.python.org/3/library/stdtypes.html#str[str] |  https://docs.python.org/3/library/constants.html#None[None]_link:#patroni.dcs.Cluster.leader_name[];;
  The name of the leader if defined otherwise `+None+`.
+
_property _min_version_:  https://docs.python.org/3/library/typing.html#typing.Tuple[Tuple][ https://docs.python.org/3/library/functions.html#int[int], ...] |  https://docs.python.org/3/library/constants.html#None[None]_link:#patroni.dcs.Cluster.min_version[];;
  Lowest Patroni software version found in known members of the cluster.
+
should_enforce_hot_standby_feedback(_my_name:  https://docs.python.org/3/library/stdtypes.html#str[str]_, _nofailover:  https://docs.python.org/3/library/functions.html#bool[bool]_) →  https://docs.python.org/3/library/functions.html#bool[bool] https://github.com/zalando/patroni/blob/3d527f5728fa8c6fadc55284cf854eead6a30a9b/patroni/dcs/\\__init\\__.py#L1243-L1261[View on GitHub]link:#patroni.dcs.Cluster.should_enforce_hot_standby_feedback[];;
  Determine whether `+hot_standby_feedback+` should be enabled for the given member.
  +
  The `+hot_standby_feedback+` must be enabled if the current replica has `+logical+` slots, or it is working as a cascading replica for the other node that has `+logical+` slots.
  +
  Parameters:::
  Returns:::
    `+True+` if this node or any member replicating from this node has permanent logical slots, otherwise `+False+`.
+
_property _slots_:  https://docs.python.org/3/library/typing.html#typing.Dict[Dict][ https://docs.python.org/3/library/stdtypes.html#str[str],  https://docs.python.org/3/library/functions.html#int[int]] |  https://docs.python.org/3/library/constants.html#None[None]_link:#patroni.dcs.Cluster.slots[];;
  `+{"slot_name":+``+ +``+int}+`.
  +
  Type:::
    State of permanent replication slots on the primary in the format
+
_property _timeline_:  https://docs.python.org/3/library/functions.html#int[int]_link:#patroni.dcs.Cluster.timeline[];;
  Get the cluster history index from the `+history+`.
  +
  Returns:::
    If the recorded history is empty assume timeline is `+1+`, if it is not defined or the stored history is not formatted as expected `+0+` is returned and an error will be logged. Otherwise, the last number stored incremented by 1 is returned.
  Example:::
    No history provided: >>> Cluster(0, 0, 0, Status.empty(), 0, 0, 0, 0, None, \{}).timeline 0
    +
    Empty history assume timeline is `+1+`: >>> Cluster(0, 0, 0, Status.empty(), 0, 0, 0, TimelineHistory.from_node(1, ‘[]’), None, \{}).timeline 1
    +
    Invalid history format, a string of `+a+`, returns `+0+`: >>> Cluster(0, 0, 0, Status.empty(), 0, 0, 0, TimelineHistory.from_node(1, ‘[[“a”]]’), None, \{}).timeline 0
    +
    History as a list of strings: >>> history = TimelineHistory.from_node(1, ‘[[“3”, “2”, “1”]]’) >>> Cluster(0, 0, 0, Status.empty(), 0, 0, 0, history, None, \{}).timeline 4
+
_property _use_slots_:  https://docs.python.org/3/library/functions.html#bool[bool]_link:#patroni.dcs.Cluster.use_slots[];;
  `+True+` if cluster is configured to use replication slots.