PGpool

数据库pgpool-II 4.1.4 高可用集群之VIP漂移

由 て烟熏妆下的殇ゞ 提交于 2021-02-01 12:54:51
问题描述： 在一次部署PostgreSQL12.3流复制+pgpool-ii 4.1.4高可用集群的时候，遇到了很奇怪的vip漂移问题：PostgreSQL主库down掉后，vip不会漂移到备库，但是当我把主库启动后，vip反而漂移到了备库。 解决思路： 第一反应就是failover_stream.sh切换脚本有问题，于是手动执行了一下脚本，发现这个脚本只是用来切换PostgreSQL数据库主、备角色的，VIP并没有发生什么变化；期间参考了百度十几种方法和建议，都没有解决这个问题。最终，我在PostgreSQL官网找到了答案，与大家分享。 问题排查： 其实这个问题是pgpool-ii 4.1.4配置文件参数导致的，我看了网上很多的部署教程，在配置pgpool的时候都没有注意这个地方,如下： 3.1.vi进入pgpool配置文件pgpool.conf，找到以下部分； 修改如下： watchdog 发生故障后, 处理的相关配置(宕机, pgpool进程终止) #- Watchdog consensus settings for failover – failover_when_quorum_exists = on failover_require_consensus = on allow_multiple_failover_requests_from_node = on

Cannot configure pgpool with master and slave nodes

由 ╄→гoц情女王★ 提交于 2021-01-29 22:02:12
问题 I have created a master-slave postgreSQL (I have one cluster as main and the other one as hot_standby). All local host. I used the "pgpool.conf.sample" and changed the backend 1+2 for my master and slave nodes. whenever I open the pgpool and run show pool_nodes; I can see the master + slave but slave is on waiting status. If I return to the configuration file and turn on the master_slave_mode, now both nodes are "up" but they're standby and all goes through the master one. What i'm trying to

Cannot configure pgpool with master and slave nodes

由 房东的猫 提交于 2021-01-29 17:24:54
问题 I have created a master-slave postgreSQL (I have one cluster as main and the other one as hot_standby). All local host. I used the "pgpool.conf.sample" and changed the backend 1+2 for my master and slave nodes. whenever I open the pgpool and run show pool_nodes; I can see the master + slave but slave is on waiting status. If I return to the configuration file and turn on the master_slave_mode, now both nodes are "up" but they're standby and all goes through the master one. What i'm trying to

pid file disappears after starting pgpool with ubuntu and postgresql

由 五迷三道 提交于 2021-01-27 06:25:11
问题 I´ve installed postgresql 9.1 on ubuntu 12.04 with pgpoolII-3.3.3 and pgPoolAdmin If I try to run pgpool from a terminal with sudo pgpool it seems to start. Viewing ubuntu file explorer I can see how a pgpool.pid file is created at /var/run/pgpool/pgpool.id (this is the path in pgpool.conf) But after one second the file disappears. I have tried to change the owner of the directory and the directory permissions but nothing seems to fix it. If after that I try to stop pgpool wiht sudo pgpool -m

pid file disappears after starting pgpool with ubuntu and postgresql

由 随声附和 提交于 2021-01-27 06:25:08
问题 I´ve installed postgresql 9.1 on ubuntu 12.04 with pgpoolII-3.3.3 and pgPoolAdmin If I try to run pgpool from a terminal with sudo pgpool it seems to start. Viewing ubuntu file explorer I can see how a pgpool.pid file is created at /var/run/pgpool/pgpool.id (this is the path in pgpool.conf) But after one second the file disappears. I have tried to change the owner of the directory and the directory permissions but nothing seems to fix it. If after that I try to stop pgpool wiht sudo pgpool -m

Multiple bitnami pgpool-II container

由 ☆樱花仙子☆ 提交于 2021-01-07 01:31:12
问题 Need clarification if this is doable. I have successfully ran Postgres with 2 containers namely master and slave . I would like to know if I can run more than one pgpool container ? If yes, is there any specific environment variables i need to set ? Can I just take the below command and run in another pgpool VM ? My intention is to have a load balancer round robin between the 2 pgpool that connects to the backend of master (rw) and slave (ro). docker run --detach --rm --name pgpool \ -

Multiple bitnami pgpool-II container

由 半城伤御伤魂 提交于 2021-01-07 01:27:24
问题 Need clarification if this is doable. I have successfully ran Postgres with 2 containers namely master and slave . I would like to know if I can run more than one pgpool container ? If yes, is there any specific environment variables i need to set ? Can I just take the below command and run in another pgpool VM ? My intention is to have a load balancer round robin between the 2 pgpool that connects to the backend of master (rw) and slave (ro). docker run --detach --rm --name pgpool \ -

PostgreSQL.Live生而全球 敢于颠覆

由 寵の児 提交于 2020-08-16 06:11:39
这，是开源技术的未来 这，汇集中外大咖 分享核心技术 这，畅聊主流话题 交流顶尖技术 这，与顶级企业联手，合作共赢 PostgreSQL.Live简介 PostgreSQL.Live由中国PostgreSQL分会与PostgreSQL国际社区共同筹备、知名PostgreSQL生态链企业参与，live沙龙将以在线直播+按需学习相结合的方式，面向全球开发者、架构师、PostgreSQL用户和爱好者免费开放；同时设有线上专家一对一、技术团队面对面等环节。 PostgreSQL.Live云端技术沙龙 第一期：未来的PostgreSQL分片 主讲人：Bruce Momjian 简介： Bruce Momjian是PostgreSQL全球开发小组的联合创始人和核心团队成员，也是Ad-dison-Wesley出版的《PostgreSQL的简介和概念》一书的作者。Bruce Momjian从2006年开始受聘于EnterpriseDB,目前担任EnterpriseDB副总裁一职。 主题分享： 探讨分片的优点和未来PostgreSQL分片实现的需求。 活动详情点击下方链接 未来的PostgreSQL分片 第二期：Postgres中的表分区 主讲人：Amit Langote 简介： Amit Langote是PostgreSQL社区的主要开发者之一，来自EnterpriseDB日本公司

Pgpool-II 模式初步浅析

由 丶灬走出姿态 提交于 2020-07-27 11:33:36
Pgpool-II 模式初步浅析 1.什么是pgpool-II 简单通俗的来讲，pgpool-II 是一个位于 PostgreSQL 服务器和 PostgreSQL 数据库客户端之间的中间件。pgpool-II主要提供负载均衡、连接池、复制、并行查询等等功能。Pgpool-ll可以运行在linux、solaris、FreeBSD以及基本上所有的类UNIX架构的平台。不支持Windows系统。 2.Pgpool-ll提供以下几种模式： 1)连接池模式 在连接池模式中，所有在原始模式中的功能以及连接池功能都可以使用连接池模，pgpool-ll保持已经连接到PostgreSql的服务器连接，通过使用相同参数连接重用，减少连接开销，增加系统总体吞吐量。使用连接池模式需要配置max_pool参数。 2)复制模式 通过管理连接多个PostgreSql服务器，使在两台及以上更多的后端节点中建立一个备份节点。要启用数据库复制功能，需要设置 pgpool.conf 文件中的 replication_mode 为 true。 replication_mode = true （pgpool-II 发送一份接收到的查询的拷贝到所有的数据库节点） load_balance_mode = true（pgpool-II在数据库节点之间分发 SELECT 查询） 3)并行模式 为了在 pgpool-II

Pgpool-II: Delegated IP is not available when disconnected Primary or Standby Node Failed

由 妖精的绣舞 提交于 2020-05-17 07:06:22
问题 I'm trying to setup postgres cluster of two nodes (primary and standby). In order to activate automatic failover, I'm using pgpool-II. I followed the following article: https://www.pgpool.net/docs/41/en/html/example-cluster.html and the only thing difference I did is installing postgresql version 12 instead of version 11. Knowing that I'm trying it useing two centos7 images on Proxmox. I faced the following issues: When I run systemctl status pgpool.service on both nodes, it returned success.
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