patroni启动，提示waiting for leader to bootstrap

patroni集群第一次初始化失败，再次使用原来的配置尝试初始化，查看信息，不同节点都显示同一个信息：waiting for leader to bootstrap

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#  systemctl status  patroni.service ● patroni.service - PostgreSQL high-availability manager    Loaded: loaded (/usr/lib/systemd/system/patroni.service; disabled; vendor preset: disabled)    Active: active (running) since Sat 2020-02-22 17:41:50 CST; 11s ago  Main PID: 3104 (python3.6)     Tasks: 5    CGroup: /system.slice/patroni.service            └─3104 python3.6 /opt/app/patroni/bin/patroni /opt/app/patroni/etc/postgresql.yml   Feb 22 17:41:50 docker02 systemd[1]: Started PostgreSQL high-availability manager. Feb 22 17:41:50 docker02 systemd[1]: Starting PostgreSQL high-availability manager... Feb 22 17:41:50 docker02 patroni[3104]: 2020-02-22 17:41:50,916 INFO: Selected new etcd server http://11.11.11.250:2379 Feb 22 17:41:50 docker02 patroni[3104]: 2020-02-22 17:41:50,928 INFO: No PostgreSQL configuration items changed, nothing to reload. Feb 22 17:41:50 docker02 patroni[3104]: 2020-02-22 17:41:50,935 INFO: Lock owner: None; I am pg01 Feb 22 17:41:50 docker02 patroni[3104]: 2020-02-22 17:41:50,937 INFO: waiting for leader to bootstrap Feb 22 17:42:00 docker02 patroni[3104]: 2020-02-22 17:42:00,934 INFO: Lock owner: None; I am pg01 Feb 22 17:42:00 docker02 patroni[3104]: 2020-02-22 17:42:00,939 INFO: waiting for leader to bootstrap

　　

原因：
etcd保留了集群的初始化信息（键：/service/$CLUSTER_NAME/initialize）。该键存在后，patroni就不会再次执行initdb。而是尝试再次引导已经存在的节点。

 

解决方法：
1.使用patronictl手动移除etcd中的/service/$CLUSTER_NAME/initialize
2.设置一个新的cluster name后从新引导

 

以下是手动移除的过程：

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# patronictl -c /opt/app/patroni/etc/postgresql.yml  list +---------+--------+--------------+------+---------+----+-----------+ | Cluster | Member |     Host     | Role |  State  | TL | Lag in MB | +---------+--------+--------------+------+---------+----+-----------+ |  batman |  pg01  | 11.11.11.111 |      | stopped |    |   unknown | +---------+--------+--------------+------+---------+----+-----------+ # patronictl -c /opt/app/patroni/etc/postgresql.yml  remove batman +---------+--------+--------------+------+---------+----+-----------+ | Cluster | Member |     Host     | Role |  State  | TL | Lag in MB | +---------+--------+--------------+------+---------+----+-----------+ |  batman |  pg01  | 11.11.11.111 |      | stopped |    |   unknown | +---------+--------+--------------+------+---------+----+-----------+ Please confirm the cluster name to remove: batman You are about to remove all information in DCS for batman, please type: "Yes I am aware": Yes I am aware