我的 PostgreSQL 集群备用节点上的 PostgreSQL 服务在我启动 Patroni 服务后一次又一次地启动和停止。
我想使用 Patroni 1.6.4 和 etcd 3.3 在两台计算机上构建一个 PostgreSQL HA 集群。首先，我建立了一个健康的 etcd 集群。
member 230e646882873b50 is healthy: got healthy result from http://10.19.170.119:2379
member afcefe35d67a646c is healthy: got healthy result from http://10.19.170.155:2379
cluster is healthy
接下来，我在两台计算机（在端口 5433 上运行）上构建了一个流复制 PostgreSQL 集群，运行良好。
然后我停止了 PostgreSQL 集群并在主服务器和备用服务器上启动了 Patroni。
主服务器上的 PostgreSQL 和 Patroni 服务似乎工作正常。
2020-04-02 18:17:22,402 INFO: Lock owner: pgsql_119; I am pgsql_119
2020-04-02 18:17:22,430 INFO: no action. i am the leader with the lock
2020-04-02 18:17:26,402 INFO: Lock owner: pgsql_119; I am pgsql_119
2020-04-02 18:17:26,430 INFO: no action. i am the leader with the lock
但是备用服务器上出现了问题。备用服务器上的 Patroni 打印消息如下：
2020-04-02 18:45:25,995 INFO: no action. i am a secondary and i am following aleader
2020-04-02 18:45:27,285 INFO: closed patroni connection to the postgresql cluster
2020-04-02 18:45:27,722 INFO: postmaster pid=7448
2020-04-02 18:45:27.832 HKT [7448] LOG: listening on IPv4 address "0.0.0.0", port 5433
2020-04-02 18:45:27.994 HKT [7448] LOG: redirecting log output to logging collector process
2020-04-02 18:45:27.994 HKT [7448] HINT: Future log output will appear in directory "log".
2020-04-02 18:45:30,058 INFO: Lock owner: pgsql_node119; I am pgsql_node155
2020-04-02 18:45:30,058 INFO: does not have lock
2020-04-02 18:45:30,058 INFO: establishing a new patroni connection to the postgres cluster
2020-04-02 18:45:31,162 INFO: no action. i am a secondary and i am following aleader
2020-04-02 18:45:32,460 INFO: closed patroni connection to the postgresql cluster
2020-04-02 18:45:32,875 INFO: postmaster pid=8820
2020-04-02 18:45:32.996 HKT [8820] LOG: listening on IPv4 address "0.0.0.0", port 5433
2020-04-02 18:45:33.161 HKT [8820] LOG: redirecting log output to logging collector process
2020-04-02 18:45:33.161 HKT [8820] HINT: Future log output will appear in directory "log".
2020-04-02 18:45:35,211 INFO: Lock owner: pgsql_node119; I am pgsql_node155
2020-04-02 18:45:35,211 INFO: does not have lock
2020-04-02 18:45:35,211 INFO: establishing a new patroni connection to the postgres cluster
2020-04-02 18:45:37,215 INFO: establishing a new patroni connection to the postgres cluster
postgresql日志内容重复如下：
FATAL: the database system is starting up
LOG: redo starts at 0/3A000060
LOG: consistent recovery state reached at 0/3A000140
LOG: invalid record length at 0/3A000140: wanted 24, got 0
LOG: database system is ready to accept read only connections
LOG: started streaming WAL from primary at 0/3A000000 on timeline 40
LOG: received fast shutdown request
LOG: aborting any active transactions
FATAL: terminating connection due to administrator command
FATAL: terminating walreceiver process due to administrator command
LOG: shutting down
LOG: database system is shut down
LOG: database system was shut down in recovery at 2020-04-02 18:50:20 CST
这意味着备用服务器上的 PostgreSQL 每 5 秒重新启动一次！
这是我的一个赞助人.yml。另一个是相同的，除了IP地址。
scope: pgsql
namespace: /pgsql/
name: pgsql_node119
restapi:
listen: 10.19.170.119:8008
connect_address: 10.19.170.119:8008
etcd:
host: 10.19.170.119:2379
bootstrap:
# this section will be written into Etcd:/<namespace>/<scope>/config after initializing new cluster
# and all other cluster members will use it as a `global configuration`
dcs:
ttl: 30
loop_wait: 10
retry_timeout: 10
maximum_lag_on_failover: 1048576
master_start_timeout: 300
synchronous_mode: false
# check_timeline: true
postgresql:
use_pg_rewind: true
use_slots: true
postgresql:
listen: 0.0.0.0:5433
connect_address: 10.19.170.119:5433
data_dir: "/opt/postgresql-11/data"
bin_dir: "/opt/postgresql-11/bin"
# config_dir: /etc/postgresql/9.6/main
authentication:
replication:
username: repuser
password: repuserpwd
superuser:
username: postgres
password: postgrespwd
#watchdog:
# mode: automatic # Allowed values: off, automatic, required
# device: /dev/watchdog
# safety_margin: 5
tags:
nofailover: false
noloadbalance: false
clonefrom: false
nosync: false
你知道为什么会发生这种情况或如何解决这个问题吗？谢谢你。