galera

MySQL高可用——PXC简介

六眼飞鱼酱① 提交于 2020-01-14 02:45:04
PXC简介: galera产品是以galera cluster方式为mysql提高高可用集群解决方案的。galera cluster就是集成了galera插件的mysql集群。galera replication是codership提供的mysql数据同步方案,具有高可用性,方便扩展,并且可以实现多个mysql节点间的数据同步复制与读写,可保障数据库的服务高可用及数据强一致性。 PXC属于一套近乎完美的mysql高可用集群解决方案,相比那些比较传统的基于主从复制模式的集群架构MHA和MM+keepalived,galera cluster最突出特点就是解决了诟病已久的数据复制延迟问题,基本上可以达到实时同步。而且节点与节点之间,他们相互的关系是对等的。本身galera cluster也是一种多主架构。galera cluster最关注的是数据的一致性,对待事物的行为时,要么在所有节点上执行,要么都不执行,它的实现机制决定了它对待一致性的行为非常严格,这也能非常完美的保证MySQL集群的数据一致性; 对galera cluster的封装有两个,虽然名称不同,但实质都是一样的,使用的都是galera cluster。一个MySQL的创始人在自己全新的MariaDB上实现的MAriaDB cluster;一个是著名的MySQL服务和工具提供商percona实现的percona

第三章openstack环境部署 之 mariadb-galera-server

十年热恋 提交于 2020-01-13 03:53:20
1、mariadb-galera-server 三个控制节点安装 yum install -y centos-release-openstack-stein yum install -y python-openstackclient openstack-selinux MySQL-python python2-PyMySQL yum install -y mariadb mariadb-galera-server mariadb-galera-common galera rsync 配置数据库三个控制节点 mariadb-galera-server #################################################################################### 参考文档 https://blog.51cto.com/arkling/2114967 https://www.jianshu.com/p/a99c474f9fba https://cloud.tencent.com/developer/article/1120419 https://www.cnblogs.com/hukey/p/8047070.html https://blog.csdn.net/super_man_ww/article/details

Galera_Cluster_For_MySQL集群安装

送分小仙女□ 提交于 2020-01-07 12:10:58
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Galera Cluster For MySQL简介: Galera Cluster for MySQL是一套基于同步复制的多主MySQL集群解决方案,使用简单,没有单点故障,可用性高,能很好保证业务不断增长时我们数据的安全和随时的扩展,主要特点: 同步复制 多主服务器的拓扑结构 可以在任意节点上进行读写 自动剔除故障节点 自动加入新节点 真正行级别的并发复制 客户端连接跟操作单台MySQL数据库的体验一致 注意: Galera Cluster需要至少三台mysql服务器,如果只有两台做cluster的话,一旦出现数据不一致的情况,就可能发生脑裂,需要一台仲裁服务器,如果直接三台做cluster的话,就不再需要仲裁 使用Galera Cluster For MySQL前注意事项: 使用Galera必须要给MySQL-Server打wsrep补丁.可以直接使用官方提供的已经打好补丁的MySQL安装包, 如果服务器上已经安装了标准版MYSQL,需要先卸载再重新安装.卸载前注意备份数据. MySQL/Galera集群只支持InnoDB存储引擎.如果你的数据表使用的MyISAM,需要转换为InnoDB,否则记录不会在多台复制. 可以在备份老数据时,为mysqldump命令添加-skip-create-options参数

Unable to complete SST transfer due to “WSREP: SST position can't be set in past.” error

随声附和 提交于 2020-01-05 08:36:07
问题 I am using "MariaDB 10.3.8" and "MariaBackup" for state transfer.wsrep_sst_method=Mariabackup. I have a donor node and "galera_new_cluster" is running. I want to add another node(joiner) to the cluster. After the mariabackup SST transfer finishes, I receive the error as follows WSREP: SST position can't be set in past. What's kind of error is this? How can I solve this? here is the log Joiner: 2019-02-13 9:57:54 0 [Note] WSREP: Signalling provider to continue. 2019-02-13 9:57:54 0 [Warning]

MariaDB Galera Cluster部署实践

試著忘記壹切 提交于 2019-12-21 23:37:09
官方文档: http://galeracluster.com/documentation-webpages/index.html 一、 Galera Cluster的工作原理 主要关注点是数据一致性。 事务既可以应用于每个节点,也可以不全部应用。 所以,只要它们配置正确,数据库保持同步。 Galera复制插件不同于传统的MySQL复制,可以解决多个问题,包括多主写入冲突,复制滞后和主从不同步。 在典型的Galera集群实例中,应用程序可以写入集群中的任何节点,然后通过基于认证的复制将事务提交(RBR事件)应用于所有服务器。 使用组通信和事务排序技术,基于认证的复制是同步数据库复制的另一种方法 二、Galera集群安装 说明:Galera集群至少需要三个节点的服务器硬件。 node-12:10.71.11.12 node-13:10.71.11.13 node-14:10.71.11.14 操作系统: centos7 内核版本: 3.10.0-693.21.1.el7.x86_64 开始安装 说明:为集群中的每个节点执行以下步骤。文档以node-12配置为例 1.编辑/etc/hosts文件,配置节点互相解析 [root@node-12 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4

mariadb galera - Error when a node shutdown ERROR 1047 WSREP has not yet prepared node for application use

拥有回忆 提交于 2019-12-21 04:31:06
问题 I installed 2 Mariadb Galera nodes (mariadb-galera-10.0.27-linux-x86_64.tar.gz) on 2 CentOs 6.6 servers. After installed, I start node1 with parameter --wsrep-new-cluster , then start node2 without this parameter. They work fine, data is synchronized successfully between 2 nodes. But, when I shutdown node1. Node2 still running, but when I try to access database. It show this error: use testdb; ERROR 1047 (08S01): WSREP has not yet prepared node for application use What's happen in this case?

What's causing subsequent errors when restarting deadlocked transaction?

我与影子孤独终老i 提交于 2019-12-13 02:59:35
问题 When restarting a failed transaction at commit stage I get a second failure when restarting the transaction. This is running Galera Cluster under MariaDB 10.2.6. The sequence of events goes like this: Commit a transaction (say a single insert). COMMIT fails with error 1213 "Deadlock found when trying to get lock" Begin a new transaction to replay the SQL statement[s]. BEGIN fails with error 1047 "WSREP has not yet prepared node for application use" My application bails to avoid a more serious

Taking backup from one simple simplex confg mariadb pod and restoring it to 3 node galera mariadb pod

你离开我真会死。 提交于 2019-12-11 15:12:26
问题 I have single mariadb pod in simplex conf. I understand that backup & restore will work when i try to backup from 1 simple simplex mariadb to 1 simple simplex mariadb. But i want to take backup from 1 simple simplex mariadb and restore it to 3 node galera mariadb. i tried mysqldump but vain. Is there any procedure to do so? Kindly let me know. 来源: https://stackoverflow.com/questions/58620045/taking-backup-from-one-simple-simplex-confg-mariadb-pod-and-restoring-it-to-3-no

How to stop a deadlock on one node from crashing entire cluster?

大兔子大兔子 提交于 2019-12-11 02:22:03
问题 I'm running a 3x node Galera Cluster under MariaDB. The application is in PHP using the mysqli extension. Very occasionally I get a Deadlock on write. I'm working on improving my application to handle or avoid that kind of failure, but in the mean time I need the cluster to stay up when this happens. The problem is that as soon as the deadlock occurs, not just one, but all three nodes in the cluster crash. The node where the deadlock originates suffers the MySQL server has gone away error and

Unable to create MariaDB Galera Cluster

久未见 提交于 2019-12-10 13:26:21
问题 I have built an image based on mariadb:10.1 which basically adds a new cluster.conf but facing the following error on the second node after the first node started working successfully. Can somebody help me debug here? Error log tail 2016-09-28 10:12:55 139799503415232 [ERROR] WSREP: failed to open gcomm backend connection: 110: failed to reach primary view: 110 (Connection timed out) at gcomm/src/pc.cpp:connect():162 2016-09-28 10:12:55 139799503415232 [ERROR] WSREP: gcs/src/gcs_core.cpp:gcs