摘要

redis4.0单机的安装与配置
redis4.0集群的安装与配置
redis4.0集群安装配置踩坑全纪录

ubuntu单机安装与配置redis4.0

环境

ubuntu14.04 LTS

准备工作

1、下载

下载redis4.0.9，网址
http://download.redis.io/releases/

2、安装GCC

sudo apt-get build-dep gcc
#or
sudo apt-get install build-essential

安装与配置redis

1、编译

将redis-4.0.9.tar.gz放在usr/server中，然后

#解压
tar zxvf redis-4.0.9.tar.gz

#编译
cd /usr/server/redis-4.0.9
make

2、修改配置文件

sudo vim redis.conf

#修改如下几项

1、注释掉bind，去掉本地回环网络，保证别的机器访问
#bind 127.0.0.1

2、修改daemonize，使其可以守护进程运行
daemonize yes

3、持久化，如需关闭，则注释掉save配置
#save 900 1
#save 300 10
#save 60 10000

4、protected-mode 改为no，即可允许别的机器访问这个redis

5、配置密码
requirepass 818

3、启动、测试与关闭redis

cd redis-4.0.9/src

# 启动redis
./redis-server

# 进入客户端，测试redis
./redis-cli -h 127.0.0.1 -p 6379

#如果有密码需在进入客户端后输入
auth 818

#测试
set a like
get a 
#like

#关闭redis
./redis-cli shutdown

ubuntu14安装与配置redis4.0集群

环境

三台ubuntu14.04 LTS，ip为:

xxx.133.17.168
xxx.133.17.169
xxx.133.17.170

安装与配置redis集群

1、根据“单机安装与配置redis4.0”的步骤，在三台机器分别安装redis并编译。

2、在xxx.133.17.168机器，进入编译后的redis目录下，创建两个文件夹，作为两个redis节点存放配置文件的路径（其他机器也如此，节点从7000分配到7005）。

mkdir -p redis-cluster/7000
mkdir -p redis-cluster/7001

3、把默认配置文件复制到节点文件夹（其他机器也如此）。

cp redis.conf redis-cluster/7000
cp redis.conf redis-cluster/7001

4、修改6个节点的redis.conf（以7000为例）。

sudo vim redis-cluster/7000/redis.conf

bind 127.0.0.1 xxx.133.17.168

port 7000

daemonize yes

pidfile /var/run/redis_7000.pid

cluster-enabled yes

cluster-config-file nodes_7000.conf

cluster-node-timeout 15000

requirepass 818

5、进入redis的src文件夹，分别启动这6个节点。

./redis-server ../redis-cluster/7000/redis.conf 

#查看是否启动成功
ps aux | grep redis

6、安装ruby环境，这里特比强调，由于之前是直接安装ruby，总是报缺少oepnssl的错误，也踩过很多其他的坑，所以要用rvm安装ruby。

curl -L get.rvm.io | bash -s stable
echo "source ~/.bashrc" >> ~/.bash_profile
echo "source ~/.rvm/scripts/rvm" >> ~/.bashrc
source ~/.bashrc
rvm -v
rvm install 2.3.3
gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/
gem install redis

./redis-trib.rb create --replicas 1 xxx.xxx.xxx.168:7000 xxx.xxx.xxx.168:7001 xxx.xxx.xxx.169:7002 xxx.xxx.xxx.169:7003 xxx.xxx.xxx.170:7004 xxx.xxx.xxx170:7005

输入yes

出现
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
120.133.17.168:7000
120.133.17.169:7002
120.133.17.170:7004
Adding replica 120.133.17.169:7003 to 120.133.17.168:7000
Adding replica 120.133.17.170:7005 to 120.133.17.169:7002
Adding replica 120.133.17.168:7001 to 120.133.17.170:7004
.
.
.
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

大功告成！

7、启动集群并测试。

进入两个节点的客户端，一个set，另一个get，看是否可以get到。

./redis-cli -c -h xxx.133.17.168 -p 7001
auth 818
set a like

./redis-cli -c -h xxx.133.17.170 -p 7003
get a
出现like，搞定。

在某节点的redis-cli下，执行cluster info，出现

cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:3
cluster_stats_messages_ping_sent:304
cluster_stats_messages_pong_sent:277
cluster_stats_messages_meet_sent:3
cluster_stats_messages_sent:584
cluster_stats_messages_ping_received:274
cluster_stats_messages_pong_received:307
cluster_stats_messages_meet_received:3
cluster_stats_messages_received:584

8、单机未设定密码，为集群添加密码。

进入6个节点的客户端（以7000为例）

redis-cli -h xxx.133.17.168 -p 7000
config set masterauth 818
config set requirepass 818
auth  818
config rewrite
exit

修改集群启动文件

find / -name client.rb
找到带GEM的
sudo vim /home/rdadmin/.rvm/gems/ruby-2.3.3/gems/redis-4.0.1/lib/redis/client.rb

修改这一项：
:password => "818",

具体如下：
DEFAULTS = {
      :url => lambda { ENV["REDIS_URL"] },
      :scheme => "redis",
      :host => "127.0.0.1",
      :port => 6379,
      :path => nil,
      :timeout => 5.0,
      :password => "818",
      :db => 0,
      :driver => nil,
      :id => nil,
      :tcp_keepalive => 0,
      :reconnect_attempts => 1,
      :inherit_socket => false
    }

修改后登录客户端时，需要两步：
./redis-cli -c -h 192.168.1.104 -p 7001 
auth 818

9、重启集群

每台机器，pkill -9 redis ，再挨个重启6个节点，好像就OK了。。。

又有人说redis集群重启需要删除各个节点下的文件，删除命令如下:

rm -rf appendonly.aof | rm -rf dump.rdb | rm -rf nodes.conf | rm -rf redis.log

待验证。。。

ubuntu安装与配置redis4.0集群踩坑历程

在安装配置ruby时，踩了N多坑，在此记录下来。

1、未安装ruby时，在src下执行

./redis-trib.rb create --replicas 1 120.133.17.168:7000 120.133.17.168:7001 
120.133.17.169:7002 120.133.17.169:7003 120.133.17.170:7004 120.133.17.170:7005

会出现redis-trib.rb: command not found，说明需要安装ruby。

2、安装ruby

sudo apt-get install ruby

sudo gem install redis

此时会提示ruby版本太低，然后按照一个教程安了最新的ruby2.4.4

参考链接：https://blog.csdn.net/fengbingchun/article/details/61614738

安装最新的ruby后，再sudo gem install redis，又出现Could not find a valid gem 'redis' (>= 0) in any repository

通过gem source查看ruby是否在gem的source里，但是出现新的错误，Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources

网上又搜到一篇很复杂的ssl安装配置教程，还是不行。

最后搜到正确的方案是通过rvm安装ruby，会自动配置openssl，于是安装rvm：

curl -L get.rvm.io | bash -s stable

echo "source ~/.bashrc" >> ~/.bash_profile

echo "source ~/.rvm/scripts/rvm" >> ~/.bashrc

source ~/.bashrc

rvm -v

type rvm | head -1

rvm is a function

rvm install 2.3.3

再次运行命令gem install redis 发现卡死，换个源吧：

gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/

再次gem install redis

然后在redis的src

./redis-trib.rb create --replicas 1 xxx.133.17.168:7000 xxx.133.17.168:7001 xxx.133.17.169:7002 xxx.133.17.169:7003 xxx.133.17.170:7004 xxx.133.17.170:7005

出现 [ERR] Sorry, can't connect to node 120.133.17.168:7000

原来是忘启动redis服务了

./redis-server ../redis-cluster/7000/redis.conf后再./redis-trib.rb

出现Node xxx.133.17.168:7000 is not empty. Either the node already knows other nodes (check with CLUSTER NODES) or contains some key in database 0.

原来是之前的redis被使用过，里面有内容,此时需要:

redis-cli -h xxx.133.17.168 -p 7000 -a 818

redis-cli -h xxx.xxx.xxx.168 -p 7000 flushdb

然后执行./redis-trib.rb，出现

>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
xxx.133.17.168:7000
xxx.133.17.169:7002
xxx.133.17.170:7004
Adding replica xxx.133.17.169:7003 to xxx.133.17.168:7000
Adding replica xxx.133.17.170:7005 to xxx.133.17.169:7002
Adding replica xxx.133.17.168:7001 to xxx.133.17.170:7004
M: dcc389f4c868cc007440850d9c0c236a24df7063 xxx.133.17.168:7000
   slots:0-5460,5474,5798,14537 (5464 slots) master
S: d894018e978846a3c65b72eb1313a7b22f7499b5 xxx.133.17.168:7001
   replicates 5be3afcc4518d2ed7abe3c9459d60700c07c92e0
M: 198e9fb972c5605030ed6d1e5cc359ae5e956666 xxx.133.17.169:7002
   slots:5461-10922,15495 (5463 slots) master
xxx   replicates dcc389f4c868cc007440850d9c0c236a24df7063
M: 5be3afcc4518d2ed7abe3c9459d60700c07c92e0 xxx.133.17.170:7004
   slots:10923-16383 (5461 slots) master
S: fc813d3533157a59c5159525ad1612ca13513652 xxx.133.17.170:7005
   replicates 198e9fb972c5605030ed6d1e5cc359ae5e956666
Can I set the above configuration? (type 'yes' to accept):

激动的输入yes后，出现

/home/rdadmin/.rvm/gems/ruby-2.3.3/gems/redis-4.0.1/lib/redis/client.rb:119:in `call': ERR Slot 5474 is already busy (Redis::CommandError)

继续进入客户端

redis-cli -h xxx.133.17.168 -p 7000
auth 818
flushall
cluster resetsoft 
exit

再次在src下执行 ./redis-trib.rb，大功告成！

参考链接

官方文档：http://www.redis.cn/topics/cluster-tutorial.html
正确搭建流程：https://blog.csdn.net/u011726984/article/details/78819542
密码问题：https://www.jianshu.com/p/40fbcadde1ac
redis不为空：https://blog.csdn.net/vtopqx/article/details/50235737
rvm安装ruby：https://www.cnblogs.com/custer/p/6267506.html

ubuntu14搭建redis4.0集群的坎坷之路

摘要