greenplum 集群新增 standby节点
2018-11-16 11:17
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greenplum 单独添加 standby
本文主要介绍如何为没有做Standby的Master节点添加Standby。(快速整理版)
旧版本gp集群需要注意!!!!
在为Master节点搭建Standby的过程中,GreenPlum会自动关闭数据库,并以utility模式打开Master节点,然后修改gp_segment_configuration字典中增加Standby的信息,然后再关闭Master节点,将Master的数据拷贝到Standby节点,最后启动数据库,所以,在为Master节点添加Standby时,需要在空闲时段进行,否则会影响业务。
添加新节点需要完成如下工作:
参考信息:
http://blog.51cto.com/michaelkang/2167195
1:新建gp 用户,用户id 与集群节点保持一直; 2:新建数据目录,chown gpadmin.gpadmin $DIR; 3:集群所有主机(Master节点和所有Segment节点)的hosts文件均需要添加Standby主机的信息。 4:完成系统初始化(关闭防火墙,selinux ,sysctl.conf ,limits.conf ...),具体参考greenplum 集群安装初始化安装步骤; 5:直接打通master节点 ssh 免密登陆新添加standby ; 6:standby节点 ssh 免密登陆集群其它节点,通过gpssh工具测试; 7:安装greenplum 软件包 8:检查新添加standby 节点安装目录权限,chown gpadmin.gpadmin $DIR 9:设置standby 节点gpadmin账户的环境变量,使之生效; 以上确认配置没问题后: 10.在Master节点通过gpinitstandby命令添加Standby。 (gpadmin 用户执行) [gpadmin@mdw config]$ gpinitstandby -s standby-node
操作实例:
[gpadmin@kangjianhua-6-16 ~]$ gpinitstandby -s kangjianhua-6-15.ptmind.com gpadmin-[INFO]:-Validating environment and parameters for standby initialization... gpadmin-[INFO]:-Checking for filespace directory /usr/local/gpdata/gpmaster/gpseg-1 on kangjianhua-6-15.ptmind.com gpadmin-[INFO]:------------------------------------------------------ gpadmin-[INFO]:-Greenplum standby master initialization parameters gpadmin-[INFO]:------------------------------------------------------ gpadmin-[INFO]:-Greenplum master hostname = kangjianhua-6-16.ptmind.com gpadmin-[INFO]:-Greenplum master data directory = /usr/local/gpdata/gpmaster/gpseg-1 gpadmin-[INFO]:-Greenplum master port = 5432 gpadmin-[INFO]:-Greenplum standby master hostname = kangjianhua-6-15.ptmind.com gpadmin-[INFO]:-Greenplum standby master port = 5432 gpadmin-[INFO]:-Greenplum standby master data directory = /usr/local/gpdata/gpmaster/gpseg-1 gpadmin-[INFO]:-Greenplum update system catalog = On gpadmin-[INFO]:------------------------------------------------------ gpadmin-[INFO]:- Filespace locations gpadmin-[INFO]:------------------------------------------------------ gpadmin-[INFO]:-pg_system -> /usr/local/gpdata/gpmaster/gpseg-1 Do you want to continue with standby master initialization? Yy|Nn (default=N): > y gpadmin-[INFO]:-Syncing Greenplum Database extensions to standby gpadmin-[INFO]:-The packages on kangjianhua-6-15.ptmind.com are consistent. gpadmin-[INFO]:-Adding standby master to catalog... gpadmin-[INFO]:-Database catalog updated successfully. gpadmin-[INFO]:-Updating pg_hba.conf file... gpadmin-[INFO]:-pg_hba.conf files updated successfully. gpadmin-[INFO]:-Updating filespace flat files... gpadmin-[INFO]:-Filespace flat file updated successfully. gpadmin-[INFO]:-Starting standby master gpadmin-[INFO]:-Checking if standby master is running on host: kangjianhua-6-15.ptmind.com in directory: /usr/local/gpdata/gpmaster/gpseg-1 20181115:18:06:06:176421 gpinitstandby:kangjianhua-6-16:gpadmin-[WARNING]:-Unable to cleanup previously started standby: 20181115:18:06:07:176421 gpinitstandby:kangjianhua-6-16:gpadmin-[INFO]:-Cleaning up pg_hba.conf backup files... 20181115:18:06:08:176421 gpinitstandby:kangjianhua-6-16:gpadmin-[INFO]:-Backup files of pg_hba.conf cleaned up successfully. 20181115:18:06:08:176421 gpinitstandby:kangjianhua-6-16:gpadmin-[INFO]:-Successfully created standby master on kangjianhua-6-15.ptmind.com
gpcc 问题处理:
greenplum master 节点迁移后,gpcc节点的配置要需要修改gpcc 连接节点的指向新的master地址:
gp 集群master切换后,需要修改:
/usr/local/gpcc/greenplum-cc-web-4.3.1/conf cp app.conf app.conf.bak vim app.conf [gpadmin@kangjianhua-6-16 conf]$ more app.conf appname = gpccws listentcp4 = true runmode = prod session = true enablexsrf = true xsrfexpire = 2592000 xsrfkey = 61oETzKXQAGaYdkLxxxxxxxxxxxxxx rendertype = json printallsqls = false master_port = 5432 path = /usr/local/gpcc display_name = gpcc enable_kerberos = false EnableHTTPS = false EnableHTTP = true httpport = 28080 rpc_port = 8899 master_host = kangjianhua-6-15.ptmind.com ==> kangjianhua-6-16.ptmind.com (新master) 《《《===修改内容 查看状态: gpcc status 启动服务: gpcc start #查看服务进程: ps -ef|grep ccagent /usr/local/gpcc/greenplum-cc-web-4.3.1/bin/ccagent -udpport 9898 -rpcaddr kangjianhua-6-15.ptmind.com:8899 安装参考: http://blog.51cto.com/michaelkang/2170631阅读更多
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