#1、redis-cli命令進入集羣環境
redis-cli -c -p 7000
#2、查看redis整個集羣的狀況，看誰是主，誰是從，常用兩種方式。
#2.1、通過redis-trib.rb check方式查看，
./redis-trib.rb check 127.0.0.1:7000
#2.2、通過redis-cli方式查看，
redis-cli -c -p 7000 cluster nodes
#3、添加Master節點到集羣
#3.1、按照Redis集羣一的方式，創建端口爲7006的新實例，並啓動該實例（操作跟其他節點一樣，注意修改端口。）
#3.2、將7006添加到集羣
cd /data/soft/redis/src/
./redis-trib.rb add-node 127.0.0.1:7006 127.0.0.1:7000
#3.3、查看所有集羣節點，看看7006節點是否添加成功
redis-cli -c -p 7000 cluster nodes
7adf4b58e321bdc0f5962dfdc1ab0eb3e6835b30 127.0.0.1:7004 slave 757c2dcebb7b8effca5e89d5c44229f9a33f6e54 0 1451322932189 5 connected
f3951a3c666b429a095375799c1ab49e694a291c 127.0.0.1:7005 slave fd92a2277ad03bf7ad51f5865edb613f498cf409 0 1451322933202 6 connected
757c2dcebb7b8effca5e89d5c44229f9a33f6e54 127.0.0.1:7001 master - 0 1451322931685 2 connected 5795-10922
84c29ba2d6aa9e6179d0faeabc54bb8cd443c4ae 127.0.0.1:7003 slave 721d0479cbd308eac871b2abe3b5805db80d2fe3 0 1451322931181 8 connected
fd92a2277ad03bf7ad51f5865edb613f498cf409 127.0.0.1:7002 master - 0 1451322932692 3 connected 11256-16383
cee383ab949eeb33d58aacde89c9cfb8eaa65eab 127.0.0.1:7006 master - 0 1451322933202 0 connected
721d0479cbd308eac871b2abe3b5805db80d2fe3 127.0.0.1:7000 myself,master - 0 0 8 connected 0-5794 10923-11255
#3.4、給新添加的7006節點分配哈希槽
cd /data/soft/redis/src/
./redis-trib.rb reshard 127.0.0.1:7000
#3.4.1、根據提示選擇要遷移的slot數量(ps:這裏選擇1000)
How many slots do you want to move (from 1 to 16384)? 1000
#3.4.2、選擇要接受這些slot的node-id（ps:這裏選擇7006節點的node-id）
What is the receiving node ID? cee383ab949eeb33d58aacde89c9cfb8eaa65eab
#3.4.3、選擇slot來源:
#all表示從所有的master重新分配，
#或者數據要提取slot的master節點id,最後用done結束（ps:這裏只選擇了7000節點的slot）
Please enter all the source node IDs.
Type 'all' to use all the nodes as source nodes for the hash slots.
Type 'done' once you entered all the source nodes IDs.
Source node #1:721d0479cbd308eac871b2abe3b5805db80d2fe3
Source node #2:done
#3.4.4、打印被移動的slot後，輸入yes開始移動slot以及對應的數據。
Do you want to proceed with the proposed reshard plan (yes/no)? yes
#3.5、查看7006節點是否變成master節點(connected是否在0-999範圍)
redis-cli -p 7000 cluster nodes | grep master | grep 7006
cee383ab949eeb33d58aacde89c9cfb8eaa65eab 127.0.0.1:7006 master - 0 1451325140212 9 connected 0-999
#4、添加Slave節點到集羣
#4.1、按照Redis集羣一的方式，創建端口爲7007的新實例，並啓動該實例（操作跟其他節點一樣，注意修改端口。）
#4.2、將7006添加到集羣
cd /data/soft/redis/src/
./redis-trib.rb add-node 127.0.0.1:7007 127.0.0.1:7000
#4.3、查看所有集羣節點，看看7007節點是否添加成功
redis-cli -c -p 7000 cluster nodes
7adf4b58e321bdc0f5962dfdc1ab0eb3e6835b30 127.0.0.1:7004 slave 757c2dcebb7b8effca5e89d5c44229f9a33f6e54 0 1451324338685 5 connected
f3951a3c666b429a095375799c1ab49e694a291c 127.0.0.1:7005 slave fd92a2277ad03bf7ad51f5865edb613f498cf409 0 1451324340703 6 connected
757c2dcebb7b8effca5e89d5c44229f9a33f6e54 127.0.0.1:7001 master - 0 1451324340197 2 connected 5795-10922
84c29ba2d6aa9e6179d0faeabc54bb8cd443c4ae 127.0.0.1:7003 slave 721d0479cbd308eac871b2abe3b5805db80d2fe3 0 1451324339190 8 connected
fd92a2277ad03bf7ad51f5865edb613f498cf409 127.0.0.1:7002 master - 0 1451324338685 3 connected 11256-16383
cee383ab949eeb33d58aacde89c9cfb8eaa65eab 127.0.0.1:7006 master - 0 1451324340197 9 connected 0-999
721d0479cbd308eac871b2abe3b5805db80d2fe3 127.0.0.1:7000 myself,master - 0 0 8 connected 1000-5794 10923-11255
9fc511d059eb7fccae41663d495e73275e942aec 127.0.0.1:7007 master - 0 1451324339693 0 connected
#4.4、設置7007成爲7006的slave
redis-cli -c -p 7007 cluster replicate cee383ab949eeb33d58aacde89c9cfb8eaa65eab
#4.5、查看7007節點是否變成7006的slave節點
redis-cli -p 7000 cluster nodes | grep slave | grep 7007
9fc511d059eb7fccae41663d495e73275e942aec 127.0.0.1:7007 slave cee383ab949eeb33d58aacde89c9cfb8eaa65eab 0 1451324745834 9 connected
#5、刪除一個Slave節點(格式：./redis-trib.rb del-node ip:port node-id,這裏以7007節點爲例 )
cd /data/soft/redis/src/
./redis-trib.rb del-node 127.0.0.1:7007 '9fc511d059eb7fccae41663d495e73275e942aec'
#6、刪除一個Master節點(這裏以7006節點爲例 )
#6.1、刪除master節點之前首先要使用reshard移除master的全部slot
cd /data/soft/redis/src/
./redis-trib.rb reshard 127.0.0.1:7006
#6.1.1、根據提示選擇要遷移的slot數量(ps:這裏選擇1000)
How many slots do you want to move (from 1 to 16384)? 1000
#6.1.2、選擇要接受這些slot的node-id（ps:這裏選擇7000節點的node-id）
What is the receiving node ID? 721d0479cbd308eac871b2abe3b5805db80d2fe3
#6.1.3、選擇slot來源：
#all表示從所有的master重新分配，
#或者數據要提取slot的master節點id,最後用done結束（ps:這裏選擇需要要刪除的7006節點slot）
Please enter all the source node IDs.
Type 'all' to use all the nodes as source nodes for the hash slots.
Type 'done' once you entered all the source nodes IDs.
Source node #1:cee383ab949eeb33d58aacde89c9cfb8eaa65eab
Source node #2:done
#6.1.4、打印被移動的slot後，輸入yes開始移動slot以及對應的數據。
Do you want to proceed with the proposed reshard plan (yes/no)? yes
#6.2、刪除空7006節點
cd /data/soft/redis/src/
./redis-trib.rb del-node 127.0.0.1:7006 'cee383ab949eeb33d58aacde89c9cfb8eaa65eab'