Redis集群搭建详细过程整理备忘

三、安装配置

1.环境

使用2台centos服务器,每台机器上部署3个实例,集群为三个主节点与三个从节点:

192.168.5.144:6380

192.168.5.144:6381

192.168.5.144:6382

192.168.5.8:6380

192.168.5.8:6381

192.168.5.8:6382

2.安装依赖

由于通过redis-trib.rb工具构建Redis Cluster,需要rudy环境,执行如下命令安装:

yum -y  install zlib ruby rubygems

安装ruby 的redis库:

gem install redis

3.安装redis 3.0.7

wget http://download.redis.io/releases/redis-3.0.7.tar.gz

tar -zxvf redis-3.0.7.tar.gz

mkdir redis

cd redis-3.0.7

make PREFIX=/home/slim/redis

make PREFIX=/home/slim/redis install

将集群工具复制到/home/slim/redis/bin下

cp /home/slim/redis-3.0.7/src/redis-trib.rb ./bin/

创建数据配置目录

mkdir -p /home/slim/redis/{conf,data,logs}

4.配置

在2台机器上配置如下:

cd /home/slim/redis

cp /home/slim/redis-3.0.7/redis.conf ./conf/redis-6380.conf 

cp /home/slim/redis-3.0.7/redis.conf ./conf/redis-6381.conf 

cp /home/slim/redis-3.0.7/redis.conf ./conf/redis-6382.conf

修改配置:

[plain] view plain copy print?Redis集群搭建详细过程整理备忘
  1. #基本配置
  2. daemonize  yes
  3. pidfile /home/slim/redis/data/redis-6380.pid
  4. port 6380
  5. bind 192.168.5.144
  6. unixsocket /home/slim/redis/data/redis-6380.sock
  7. unixsocketperm 700
  8. timeout 300
  9. loglevel verbose
  10. logfile /home/slim/redis/logs/redis-6380.log
  11. databases 16
  12. dbfilename dump-6380.rdb
  13. dir /home/slim/redis/data/
  14. #aof持久化
  15. appendonly yes
  16. appendfilename appendonly-6380.aof
  17. appendfsync everysec
  18. no-appendfsync-on-rewrite yes
  19. auto-aof-rewrite-percentage 80-100
  20. auto-aof-rewrite-min-size 64mb
  21. lua-time-limit 5000
  22. #集群配置
  23. cluster-enabled yes
  24. cluster-config-file /home/slim/redis/data/nodes-6380.conf
  25. cluster-node-timeout 5000

每个实例配置类似,修改一下都应端口、IP地址、文件名称即可。

Redis集群由多个运行在集群模式(cluster mode)下的Redis实例组成,实例的集群模式需要通过配置来开启,开启集群模式的实例将可以使用集群特有的功能和命令。要让集群正常运作至少需要三个主节点,
不过在刚开始试用集群功能时, 强烈建议使用六个节点: 其中三个为主节点, 而其余三个则是各个主节点的从节点。

cluster-enabled:开实例的集群模式

cluster-conf-file:设定了保存节点配置文件的路径,默认值为nodes.conf。节点配置文件无须人为修改,它由Redis集群在启动时创建,并在有需要时自动进行更新。

cluster-node-timeout:集群节点互连超时的阀值

5.启动服务

1)启动2台机器实例

./bin/redis-server ./conf/redis-6380.conf ;tail -f logs/redis-6380.log

./bin/redis-server ./conf/redis-6381.conf ;tail -f logs/redis-6381.log

./bin/redis-server ./conf/redis-6382.conf ;tail -f logs/redis-6382.log

这里启动的时候,可能会出现以下错误:

-bash-3.2#  ./bin/redis-server ./conf/redis-6380.conf ;tail -f logs/redis-6380.log
./bin/redis-server: /lib64/libc.so.6: version `GLIBC_2.6' not found (required by ./bin/redis-server)
tail: cannot open `logs/redis-6380.log' for reading: No such file or directory
tail: no files remaining

1.试图运行程序,提示"libc.so.6: version `GLIBC_2.6' not found",原因是系统的glibc版本太低,软件编译时使用了较高版本的glibc引起的:

[work@zc-mc-face01 src]$ ./redis-server
./redis-server: /lib64/libc.so.6: version `GLIBC_2.6' not found (required by ./redis-server)

2.查看系统glibc支持的版本:

 strings /lib64/libc.so.6 | grep GLIBC_
GLIBC_2.2.5
GLIBC_2.2.6
GLIBC_2.3
GLIBC_2.3.2
GLIBC_2.3.3
GLIBC_2.3.4
GLIBC_2.4
GLIBC_2.5
GLIBC_2.6
GLIBC_2.7
GLIBC_2.8
GLIBC_2.9
GLIBC_2.10
GLIBC_2.11
GLIBC_2.12
GLIBC_PRIVATE
rpm -qa | grep glibc
glibc-common-2.12-1.80.el6_3.6.x86_64
glibc-2.12-1.80.el6_3.6.x86_64
glibc-headers-2.12-1.80.el6_3.6.x86_64
glibc-devel-2.12-1.80.el6_3.6.x86_64

3.可以看到当前系统最高只支持2.2版本,所以需要安装新版本来解决这个问题:

 编译安装步骤如下:

a. 到http://www.gnu.org/software/libc/下载最新版本,我这里下载了glibc-2.14.tar.gz 这个版本,解压到任意目录准备编译

wget http://ftp.gnu.org/gnu/glibc/glibc-2.6.tar.gz

b.这里解压到~/glibc-2.6/  

cd /home/work/glibc-2.6/
ls
BUGS ChangeLog.2 NAMESPACE bits elf libidn po string
CANCEL-FCT-WAIVE ChangeLog.3 NEWS build extra-lib.mk libio posix sunrpc
CANCEL-FILE-WAIVE ChangeLog.4 NOTES catgets extra-modules.mk locale pwd sysdeps
CONFORMANCE ChangeLog.5 PROJECTS conf gmon localedata resolv sysvipc
COPYING ChangeLog.6 README config.h.in gnulib login resource termios
COPYING.LIB ChangeLog.7 README.libm config.make.in grp mach rt test-skeleton.c
ChangeLog ChangeLog.8 Rules configure gshadow malloc scripts time
ChangeLog.1 ChangeLog.9 Versions.def configure.in hesiod manual setjmp timezone
ChangeLog.10 FAQ WUR-REPORT conform hurd math shadow tls.make.c
ChangeLog.11 FAQ.in abi-tags cppflags-iterator.mk iconv misc shlib-versions version.h
ChangeLog.12 INSTALL abilist crypt iconvdata nis signal wcsmbs
ChangeLog.13 LICENSES aclocal.m4 csu include nptl socket wctype
ChangeLog.14 Makeconfig aout ctype inet nptl_db soft-fp
ChangeLog.15 Makefile argp debug intl nscd stdio-common
ChangeLog.16 Makefile.in assert dirent io nss stdlib
ChangeLog.17 Makerules autom4te.cache dlfcn libc-abis o-iterator.mk streams

c.在glibc源码目录建立构建目录,并cd进入构建目录

[work@zc-mc-face01 glibc-2.14]# mkdir build
[work@zc-mc-face01 glibc-2.14]# cd build

d.运行configure配置,make && sudo  make install

1. [work@zc-mc-face01 build]# ../configure --prefix=/opt/glibc-2.14

  接下来继续运行

2. [work@zc-mc-face01 build]# make -j4
3. [work@zc-mc-face01 build]# sudomakeinstall

4.临时修改环境变量

[work@zc-mc-face01 build]# export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH

5.接下来就可以正常启动redis了

[work@zc-mc-face01 build]# cd ~/app/redis-2.8.13/src
[work@zc-mc-face01 src]# ./redis-server

启动日志中打印:

“8591:M 11 Apr 22:20:46.134 * No cluster configuration found, I'm 83fc65283bbbb71b4c089337df05594d67f4cab6”

每个节点都使用 ID 而不是 IP 或者端口号来记录其他节点, 因为 IP 地址和端口号都可能会改变, 而这个独一无二的标识符(identifier)则会在节点的整个生命周期中一直保持不变。

查看启动进程:

[plain] view plain copy print?Redis集群搭建详细过程整理备忘
  1. ps -ef | grep redis
  2. slim      8525     1  0 22:16 ?        00:00:01 ./bin/redis-server 192.168.36.54:6380 [cluster]
  3. slim      8544     1  0 22:17 ?        00:00:00 ./bin/redis-server 192.168.36.54:6381 [cluster]
  4. slim      8591     1  0 22:20 ?        00:00:00 ./bin/redis-server 192.168.36.54:6382 [cluster]

2)集群配置

在每台机器上启动的redis服务都是相互独立,下面我们就使用redis-trib.rb工具构建Redis Cluster。

./bin/redis-trib.rb create --replicas 1  192.168.36.54:6380 192.168.36.54:6381
192.168.36.54:6382 192.168.36.189:6380 192.168.36.189:6381 192.168.36.189:6382

命令的意义如下:

给定 redis-trib.rb 程序的命令是 create , 这表示我们希望创建一个新的集群。

选项 --replicas 1 表示我们希望为集群中的每个主节点创建一个从节点。

之后跟着的其他参数则是实例的地址列表, 我们希望程序使用这些地址所指示的实例来创建新集群。

简单来说, 以上命令的意思就是让 redis-trib 程序创建一个包含三个主节点和三个从节点的集群。

启动日志:

[plain] view plain copy print?Redis集群搭建详细过程整理备忘
  1. >>> Creating cluster
  2. Connecting to node 192.168.36.54:6380: OK
  3. Connecting to node 192.168.36.54:6381: OK
  4. Connecting to node 192.168.36.54:6382: OK
  5. Connecting to node 192.168.36.189:6380: OK
  6. Connecting to node 192.168.36.189:6381: OK
  7. Connecting to node 192.168.36.189:6382: OK
  8. >>> Performing hash slots allocation on 6 nodes...
  9. Using 3 masters:
  10. 192.168.36.54:6380
  11. 192.168.36.189:6380
  12. 192.168.36.54:6381
  13. Adding replica 192.168.36.189:6381 to 192.168.36.54:6380
  14. Adding replica 192.168.36.54:6382 to 192.168.36.189:6380
  15. Adding replica 192.168.36.189:6382 to 192.168.36.54:6381
  16. M: f6285c8a7506b224840d7b26b2b5d1671320c21f 192.168.36.54:6380
  17. slots:0-5460 (5461 slots) master
  18. M: 26ce71d626175f88e0416e3f45b2bfb29304c7b3 192.168.36.54:6381
  19. slots:10923-16383 (5461 slots) master
  20. S: 83fc65283bbbb71b4c089337df05594d67f4cab6 192.168.36.54:6382
  21. replicates b1a15a3cd14ea65671a7134850e17b8919a17da5
  22. M: b1a15a3cd14ea65671a7134850e17b8919a17da5 192.168.36.189:6380
  23. slots:5461-10922 (5462 slots) master
  24. S: 1080e423a55a2c24dae649dac03ffa09ed26d3e8 192.168.36.189:6381
  25. replicates f6285c8a7506b224840d7b26b2b5d1671320c21f
  26. S: de4302f43ff89843675446396552fd19f741246a 192.168.36.189:6382
  27. replicates 26ce71d626175f88e0416e3f45b2bfb29304c7b3
  28. Can I set the above configuration? (type 'yes' to accept): yes
  29. >>> Nodes configuration updated
  30. >>> Assign a different config epoch to each node
  31. >>> Sending CLUSTER MEET messages to join the cluster
  32. Waiting for the cluster to join...
  33. >>> Performing Cluster Check (using node 192.168.36.54:6380)
  34. M: f6285c8a7506b224840d7b26b2b5d1671320c21f 192.168.36.54:6380
  35. slots:0-5460 (5461 slots) master
  36. M: 26ce71d626175f88e0416e3f45b2bfb29304c7b3 192.168.36.54:6381
  37. slots:10923-16383 (5461 slots) master
  38. M: 83fc65283bbbb71b4c089337df05594d67f4cab6 192.168.36.54:6382
  39. slots: (0 slots) master
  40. replicates b1a15a3cd14ea65671a7134850e17b8919a17da5
  41. M: b1a15a3cd14ea65671a7134850e17b8919a17da5 192.168.36.189:6380
  42. slots:5461-10922 (5462 slots) master
  43. M: 1080e423a55a2c24dae649dac03ffa09ed26d3e8 192.168.36.189:6381
  44. slots: (0 slots) master
  45. replicates f6285c8a7506b224840d7b26b2b5d1671320c21f
  46. M: de4302f43ff89843675446396552fd19f741246a 192.168.36.189:6382
  47. slots: (0 slots) master
  48. replicates 26ce71d626175f88e0416e3f45b2bfb29304c7b3
  49. [OK] All nodes agree about slots configuration.
  50. >>> Check for open slots...
  51. >>> Check slots coverage...
  52. [OK] All 16384 slots covered.

从启动日志可以看出有6个集群实例,主节点为:

192.168.36.54:6380

192.168.36.189:6380

192.168.36.54:6381

每个主节点对应一个从节点

Adding replica 192.168.36.189:6381 to 192.168.36.54:6380

Adding replica 192.168.36.54:6382 to 192.168.36.189:6380

Adding replica 192.168.36.189:6382 to 192.168.36.54:6381

slots划分:

192.168.36.54:6380   0-5460

192.168.36.189:6380  5461-10922

192.168.36.54:6381   10923-16383

一共16384 slots

注:redis-trib.rb使用参数

[plain] view plain copy print?Redis集群搭建详细过程整理备忘
  1. Usage: redis-trib <command> <options> <arguments ...>
  2. fix             host:port
  3. call            host:port command arg arg .. arg
  4. check           host:port
  5. import          host:port
  6. --from <arg>
  7. set-timeout     host:port milliseconds
  8. add-node        new_host:new_port existing_host:existing_port
  9. --master-id <arg>
  10. --slave
  11. reshard         host:port
  12. --to <arg>
  13. --from <arg>
  14. --slots <arg>
  15. --yes
  16. create          host1:port1 ... hostN:portN
  17. --replicas <arg>
  18. help            (show this help)
  19. del-node        host:port node_id
  20. For check, fix, reshard, del-node, set-timeout you can specify the host and port of any working node in the cluster.

参数说明:

call:执行redis命令

create:创建一个新的集群。host1:port1 ... hostN:portN指定了用于构建Redis Cluster的所有redis实例,节点角色由顺序决定,先master之后是slave。而--replicas 则指定了为Redis Cluster中的每个Master节点配备几个Slave节点。

add-node  将一个节点添加到集群里面, 第一个是新节点ip:port, 第二个是任意一个已存在节点ip:port,--master-id 

reshard:重新分片

check:查看集群信息

del-node:移除一个节点

对于客户端redis-cli要访问集群,在启动的时候需要添加一个-c参数,如查看集群所有节点:

[plain] view plain copy print?Redis集群搭建详细过程整理备忘
  1. ./bin/redis-cli -c -h 192.168.36.189 -p 6380  cluster nodes
  2. 1080e423a55a2c24dae649dac03ffa09ed26d3e8 192.168.36.189:6381 slave f6285c8a7506b224840d7b26b2b5d1671320c21f 0 1428817516066 5 connected
  3. b1a15a3cd14ea65671a7134850e17b8919a17da5 192.168.36.189:6380 myself,master - 0 0 4 connected 5461-10922
  4. 83fc65283bbbb71b4c089337df05594d67f4cab6 192.168.36.54:6382 slave b1a15a3cd14ea65671a7134850e17b8919a17da5 0 1428817515047 4 connected
  5. 26ce71d626175f88e0416e3f45b2bfb29304c7b3 192.168.36.54:6381 master - 0 1428817514946 2 connected 10923-16383
  6. f6285c8a7506b224840d7b26b2b5d1671320c21f 192.168.36.54:6380 master - 0 1428817514844 1 connected 0-5460
  7. de4302f43ff89843675446396552fd19f741246a 192.168.36.189:6382 slave 26ce71d626175f88e0416e3f45b2bfb29304c7b3 0 1428817516578 6 connected

参考文章:

1.Redis 官方集群教程

2.Redis
集群原理与使用

3.Redis
3.0.0集群试练

4.Redis3.0.0
集群示例

3

down vote

accepted

For Ruby 1.8.6 I had to add another repository.

Create /etc/yum.repos.d/ruby.repo and add the following:

[ruby]

name=ruby

baseurl=http://repo.premiumhelp.eu/ruby/

gpgcheck=0

enabled=0

Then

yum --enablerepo=ruby install ruby

From www.centos.org forums.

Don't bother installing rubygems this way, it's obsolete.



Installing RubyGems Using apt-get on Ubuntu

sudo apt-get install rubygems

Installing RubyGems Using yum

sudo yum install rubygems

Manual Installation Method

wget http://production.cf.rubygems.org/rubygems/rubygems-1.5.0.tgz

tar xvf rubygems-1.5.0.tgz

cd rubygems-1.5.0

sudo ruby setup.rb


1执行上面的命令的时候会报错,因为是执行的ruby的脚本,需要ruby的环境

错误内容:/usr/bin/env: ruby: No such file or directory

所以需要安装ruby的环境,这里推荐使用yum install ruby安装

yum install ruby

我的死活用yum 安装不成功,指定了rpm源还是不行,老是提示个别文件下载超时,没法办只能下载源文件编译。由于我的系统是centos5.4 自带的ruby是1.8.5,是不支持rubygems的。所以下载并解压Ruby 1.8.7

1.wget http://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.7-p334.tar.gz

2.tar -xzvf ruby-1.8.7-p334.tar.gz

3../configure -prefix=/usr/local -with-shared -without-debug

4.make

5.make install

6.2然后再执行第6步的创建集群命令,还会报错,提示缺少rubygems组件,使用yum安装

错误内容:

./redis-trib.rb:24:in `require': no such file to load — rubygems (LoadError)

from ./redis-trib.rb:24

yum install rubygems

如果yum 安装不成功,那么还是下载源码安装

1.wget http://production.cf.rubygems.org/rubygems/rubygems-1.6.2.tgz //最好是下载到/usr/local/src/目录中

2.tar -xzvf rubygems-1.6.2.tgz

3.cd rubygems-1.6.2

4.ruby setup.rb

6.3再次执行第6步的命令,还会报错,提示不能加载redis,是因为缺少redis和ruby的接口,使用gem 安装

错误内容:

/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load — redis (LoadError)

from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require’

from ./redis-trib.rb:25

gem install redis

6.4 再次执行第6步的命令,正常执行

输入yes,然后配置完成。

drwxr-xr-x 2 root root 4096 Jun  1 03:27 logs
-bash-3.2#  ./bin/redis-server ./conf/redis-6380.conf ;tail -f logs/redis-6380.log
./bin/redis-server: /lib64/libc.so.6: version `GLIBC_2.6' not found (required by ./bin/redis-server)
tail: cannot open `logs/redis-6380.log' for reading: No such file or directory
tail: no files remaining


Resolving ftp.gnu.org... 208.118.235.20, 2001:4830:134:3::b
Connecting to ftp.gnu.org|208.118.235.20|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 127719 (125K) [application/x-gzip]
Saving to: `glibc-libidn-2.6.tar.gz'

100%[==========================================================================================>] 127,719     64.3K/s   in 1.9s    

2016-07-18 17:12:32 (64.3 KB/s) - `glibc-libidn-2.6.tar.gz' saved [127719/127719]


以下在系统CentOS 6.3 x86_64上操作

1.试图运行程序,提示"libc.so.6: version `GLIBC_2.14' not found",原因是系统的glibc版本太低,软件编译时使用了较高版本的glibc引起的:

[work@zc-mc-face01 src]$ ./redis-server
./redis-server: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./redis-server)

2.查看系统glibc支持的版本:

[work@zc-mc-face01 src]$ strings /lib64/libc.so.6 | grep GLIBC_
GLIBC_2.2.5
GLIBC_2.2.6
GLIBC_2.3
GLIBC_2.3.2
GLIBC_2.3.3
GLIBC_2.3.4
GLIBC_2.4
GLIBC_2.5
GLIBC_2.6
GLIBC_2.7
GLIBC_2.8
GLIBC_2.9
GLIBC_2.10
GLIBC_2.11
GLIBC_2.12
GLIBC_PRIVATE
[work@zc-mc-face01 src]$ rpm -qa | grep glibc
glibc-common-2.12-1.80.el6_3.6.x86_64
glibc-2.12-1.80.el6_3.6.x86_64
glibc-headers-2.12-1.80.el6_3.6.x86_64
glibc-devel-2.12-1.80.el6_3.6.x86_64

3.可以看到当前系统最高只支持2.12版本,所以需要安装新版本来解决这个问题:

 编译安装步骤如下:

a. 到http://www.gnu.org/software/libc/下载最新版本,我这里下载了glibc-2.14.tar.gz 这个版本,解压到任意目录准备编译

wget http://ftp.gnu.org/gnu/glibc/glibc-2.14.tar.gz

b.这里解压到~/glibc-2.14/  

[work@zc-mc-face01 src]# cd /home/work/glibc-2.14/
[work@zc-mc-face01 glibc-2.14]# ls
BUGS ChangeLog.2 NAMESPACE bits elf libidn po string
CANCEL-FCT-WAIVE ChangeLog.3 NEWS build extra-lib.mk libio posix sunrpc
CANCEL-FILE-WAIVE ChangeLog.4 NOTES catgets extra-modules.mk locale pwd sysdeps
CONFORMANCE ChangeLog.5 PROJECTS conf gmon localedata resolv sysvipc
COPYING ChangeLog.6 README config.h.in gnulib login resource termios
COPYING.LIB ChangeLog.7 README.libm config.make.in grp mach rt test-skeleton.c
ChangeLog ChangeLog.8 Rules configure gshadow malloc scripts time
ChangeLog.1 ChangeLog.9 Versions.def configure.in hesiod manual setjmp timezone
ChangeLog.10 FAQ WUR-REPORT conform hurd math shadow tls.make.c
ChangeLog.11 FAQ.in abi-tags cppflags-iterator.mk iconv misc shlib-versions version.h
ChangeLog.12 INSTALL abilist crypt iconvdata nis signal wcsmbs
ChangeLog.13 LICENSES aclocal.m4 csu include nptl socket wctype
ChangeLog.14 Makeconfig aout ctype inet nptl_db soft-fp
ChangeLog.15 Makefile argp debug intl nscd stdio-common
ChangeLog.16 Makefile.in assert dirent io nss stdlib
ChangeLog.17 Makerules autom4te.cache dlfcn libc-abis o-iterator.mk streams

c.在glibc源码目录建立构建目录,并cd进入构建目录

[work@zc-mc-face01 glibc-2.14]# mkdir build
[work@zc-mc-face01 glibc-2.14]# cd build

d.运行configure配置,make && sudo  make install

1. [work@zc-mc-face01 build]# ../configure --prefix=/opt/glibc-2.14

  这一步如果config失败,显示错误如下:

checking whether ranlib is necessary... no
checking LD_LIBRARY_PATH variable... contains current directory
configure: error:
*** LD_LIBRARY_PATH shouldn't contain the current directory when
*** building glibc. Please change the environment variable
*** and run configure again.

  此时首先查看LD_LIBRARY_PATH:

echo $LD_LIBRARY_PATH
/opt/soft/jdk/jre/lib/amd64/server:

  而实际上这个路径的设置是有限制的:

# Test if LD_LIBRARY_PATH contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# LD_LIBRARY_PATH contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it

  所以这里我们只需要去掉 LD_LIBRARY_PATH 最后的那个路径分隔符':'即可:

export LD_LIBRARY_PATH=/opt/soft/jdk/jre/lib/amd64/server

  接下来继续运行

2. [work@zc-mc-face01 build]# make -j4
3. [work@zc-mc-face01 build]# sudomakeinstall

4.临时修改环境变量

[work@zc-mc-face01 build]# export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH

5.接下来就可以正常启动redis了

[work@zc-mc-face01 build]# cd ~/app/redis-2.8.13/src
[work@zc-mc-face01 src]# ./redis-server



./bin/redis-trib.rb create --replicas 1  192.168.5.155:6380 192.168.5.155:6381 192.168.5.155:6382  192.168.5.144:6380  192.168.5.144:6381  192.168.5.144:6382



[root@node00 src]# ./redis-trib.rb add-node --slave --master-id4f6424e47a2275d2b7696bfbf8588e8c4c3a5b95 172.168.63.202:7001172.168.63.202:7000

......

[OK] All nodes agree about slotsconfiguration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.

Connecting to node 172.168.63.202:7001: OK

[ERR] Node 172.168.63.202:7001 is not empty. Either the nodealready
knows other nodes (check with CLUSTER NODES) or contains somekey in database 0.


解决方法:

1)、将需要新增的节点下aof、rdb等本地备份文件删除;

2)、同时将新Node的集群配置文件删除,即:删除你redis.conf里面cluster-config-file所在的文件;

3)、再次添加新节点如果还是报错,则登录新Node,./redis-cli–h
x –p对数据库进行清除:

172.168.63.201:7001>  flushdb      #清空当前数据库


./bin/redis-server ./conf/redis-6380.conf ;

./bin/redis-server ./conf/redis-6381.conf ;

./bin/redis-server ./conf/redis-6382.conf ;


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