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 ?

#基本配置
daemonize yes
pidfile /home/slim/redis/data/redis-6380.pid
port 6380
bind 192.168.5.144
unixsocket /home/slim/redis/data/redis-6380.sock
unixsocketperm 700
timeout 300
loglevel verbose
logfile /home/slim/redis/logs/redis-6380.log
databases 16
dbfilename dump-6380.rdb
dir /home/slim/redis/data/
#aof持久化
appendonly yes
appendfilename appendonly-6380.aof
appendfsync everysec
no-appendfsync-on-rewrite yes
auto-aof-rewrite-percentage 80-100
auto-aof-rewrite-min-size 64mb
lua-time-limit 5000
#集群配置
cluster-enabled yes
cluster-config-file /home/slim/redis/data/nodes-6380.conf
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 ?

ps -ef | grep redis
slim 8525 1 0 22:16 ? 00:00:01 ./bin/redis-server 192.168.36.54:6380 [cluster]
slim 8544 1 0 22:17 ? 00:00:00 ./bin/redis-server 192.168.36.54:6381 [cluster]
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 ?

>>> Creating cluster
Connecting to node 192.168.36.54:6380: OK
Connecting to node 192.168.36.54:6381: OK
Connecting to node 192.168.36.54:6382: OK
Connecting to node 192.168.36.189:6380: OK
Connecting to node 192.168.36.189:6381: OK
Connecting to node 192.168.36.189:6382: OK
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.36.54:6380
192.168.36.189:6380
192.168.36.54:6381
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
M: f6285c8a7506b224840d7b26b2b5d1671320c21f 192.168.36.54:6380
slots:0-5460 (5461 slots) master
M: 26ce71d626175f88e0416e3f45b2bfb29304c7b3 192.168.36.54:6381
slots:10923-16383 (5461 slots) master
S: 83fc65283bbbb71b4c089337df05594d67f4cab6 192.168.36.54:6382
replicates b1a15a3cd14ea65671a7134850e17b8919a17da5
M: b1a15a3cd14ea65671a7134850e17b8919a17da5 192.168.36.189:6380
slots:5461-10922 (5462 slots) master
S: 1080e423a55a2c24dae649dac03ffa09ed26d3e8 192.168.36.189:6381
replicates f6285c8a7506b224840d7b26b2b5d1671320c21f
S: de4302f43ff89843675446396552fd19f741246a 192.168.36.189:6382
replicates 26ce71d626175f88e0416e3f45b2bfb29304c7b3
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join...
>>> Performing Cluster Check (using node 192.168.36.54:6380)
M: f6285c8a7506b224840d7b26b2b5d1671320c21f 192.168.36.54:6380
slots:0-5460 (5461 slots) master
M: 26ce71d626175f88e0416e3f45b2bfb29304c7b3 192.168.36.54:6381
slots:10923-16383 (5461 slots) master
M: 83fc65283bbbb71b4c089337df05594d67f4cab6 192.168.36.54:6382
slots: (0 slots) master
replicates b1a15a3cd14ea65671a7134850e17b8919a17da5
M: b1a15a3cd14ea65671a7134850e17b8919a17da5 192.168.36.189:6380
slots:5461-10922 (5462 slots) master
M: 1080e423a55a2c24dae649dac03ffa09ed26d3e8 192.168.36.189:6381
slots: (0 slots) master
replicates f6285c8a7506b224840d7b26b2b5d1671320c21f
M: de4302f43ff89843675446396552fd19f741246a 192.168.36.189:6382
slots: (0 slots) master
replicates 26ce71d626175f88e0416e3f45b2bfb29304c7b3
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[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

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Usage: redis-trib <command> <options> <arguments ...>
fix host:port
call host:port command arg arg .. arg
check host:port
import host:port
--from <arg>
set-timeout host:port milliseconds
add-node new_host:new_port existing_host:existing_port
--master-id <arg>
--slave
reshard host:port
--to <arg>
--from <arg>
--slots <arg>
--yes
create host1:port1 ... hostN:portN
--replicas <arg>
help (show this help)
del-node host:port node_id
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 ?

./bin/redis-cli -c -h 192.168.36.189 -p 6380 cluster nodes
1080e423a55a2c24dae649dac03ffa09ed26d3e8 192.168.36.189:6381 slave f6285c8a7506b224840d7b26b2b5d1671320c21f 0 1428817516066 5 connected
b1a15a3cd14ea65671a7134850e17b8919a17da5 192.168.36.189:6380 myself,master - 0 0 4 connected 5461-10922
83fc65283bbbb71b4c089337df05594d67f4cab6 192.168.36.54:6382 slave b1a15a3cd14ea65671a7134850e17b8919a17da5 0 1428817515047 4 connected
26ce71d626175f88e0416e3f45b2bfb29304c7b3 192.168.36.54:6381 master - 0 1428817514946 2 connected 10923-16383
f6285c8a7506b224840d7b26b2b5d1671320c21f 192.168.36.54:6380 master - 0 1428817514844 1 connected 0-5460
de4302f43ff89843675446396552fd19f741246a 192.168.36.189:6382 slave 26ce71d626175f88e0416e3f45b2bfb29304c7b3 0 1428817516578 6 connected

参考文章：

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

-bash-3.2# wget http://ftp.gnu.org/gnu/glibc/glibc-libidn-2.6.tar.gz

--2016-07-18 17:12:29-- http://ftp.gnu.org/gnu/glibc/glibc-libidn-2.6.tar.gz

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 ;