mirror of
https://github.com/outbackdingo/patroni.git
synced 2026-08-25 07:20:20 +00:00
Alexander KukushkinandGitHub
bfbc4860d5
* new node can join the cluster dynamically and become a part of consensus * it is also possible to join only Patroni cluster (without adding the node to the raft), just comment or remove `raft.self_addr` for that * when the node joins the cluster it is using values from `raft.partner_addrs` only for initial discovery. * It is possible to run Patroni and Postgres on two nodes plus one node with `patroni_raft_controller` (without Patroni and Postgres). In such setup one can temporarily lose one node without affecting the primary.
35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
import logging
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import os
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from patroni.daemon import AbstractPatroniDaemon, abstract_main
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from patroni.dcs.raft import KVStoreTTL
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from pysyncobj import SyncObjConf
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logger = logging.getLogger(__name__)
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class RaftController(AbstractPatroniDaemon):
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def __init__(self, config):
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super(RaftController, self).__init__(config)
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raft_config = self.config.get('raft')
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self_addr = raft_config['self_addr']
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template = os.path.join(raft_config.get('data_dir', ''), self_addr)
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self._syncobj_config = SyncObjConf(autoTick=False, appendEntriesUseBatch=False, dynamicMembershipChange=True,
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journalFile=template + '.journal', fullDumpFile=template + '.dump')
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self._raft = KVStoreTTL(self_addr, raft_config.get('partner_addrs', []), self._syncobj_config)
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def _run_cycle(self):
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try:
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self._raft.doTick(self._syncobj_config.autoTickPeriod)
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except Exception:
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logger.exception('doTick')
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def _shutdown(self):
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self._raft.destroy()
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def main():
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abstract_main(RaftController)
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