Redis Cluster Common commands

#1, redis-cli command into the cluster environment

Redis-cli-c-P 7000

#2, view the status of the entire Redis cluster, see who is the master, who is from, and often in two ways.

#2.1, through redis-trib.rb check method,

./REDIS-TRIB.RB Check 127.0.0.1:7000

#2.2, through the REDIS-CLI way to view,

REDIS-CLI-C-P 7000 cluster nodes

#3, add master node to cluster

#3.1. According to Redis cluster one, create a new instance of Port 7006 and start the instance (as with other nodes, be aware of modifying the port.) ）

#3.2, add 7006 to the cluster

cd/data/soft/redis/src/

./redis-trib.rb Add-node 127.0.0.1:7006 127.0.0.1:7000

#3.3. See all cluster nodes to see if the 7006 node is added successfully

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. Assign a hash slot to the newly added 7006 node

cd/data/soft/redis/src/

./redis-trib.rb Reshard 127.0.0.1:7000

#3.4.1. Select the number of slots to migrate according to the prompts (PS: Select 1000 here)

How many slots does want to move (from 1 to 16384)? 1000

#3.4.2. Select the Node-id (PS: 7006-node Node-id) to accept these slots

What is the receiving node ID? Cee383ab949eeb33d58aacde89c9cfb8eaa65eab

#3.4.3, select slot Source:

#all表示从所有的master重新分配,

#或者数据要提取slot的master节点id, End With done (PS: only 7000-node slots are selected here)

Please enter the source node IDs.

The Type ' All ' is the nodes as source nodes for the hash slots.

Type ' Done ' once your entered all the source nodes IDs.

Source node #1:721d0479cbd308eac871b2abe3b5805db80d2fe3

Source node #2:d One

#3.4.4. After printing the slot that was moved, enter Yes to begin moving the slot and the corresponding data.

Do you want to proceed with the proposed Reshard plan (yes/no)? Yes

#3.5. See if 7006 node becomes master node (connected in 0-999 range)

REDIS-CLI-P 7000 Cluster Nodes | grep Master | grep 7006

Cee383ab949eeb33d58aacde89c9cfb8eaa65eab 127.0.0.1:7006 master-0 1451325140212 9 Connected 0-999

#4, adding slave nodes to the cluster

#4.1. According to Redis cluster one, create a new instance of Port 7007 and start the instance (as with other nodes, be aware of modifying the port.) ）

#4.2, add 7006 to the cluster

cd/data/soft/redis/src/

./redis-trib.rb Add-node 127.0.0.1:7007 127.0.0.1:7000

#4.3. See all cluster nodes to see if the 7007 node is added successfully

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, setting the slave 7,007 to 7006

REDIS-CLI-C-P 7007 cluster replicate CEE383AB949EEB33D58AACDE89C9CFB8EAA65EAB

#4.5. See if the 7007 node becomes a 7006 slave node

REDIS-CLI-P 7000 Cluster Nodes | grep slave | grep 7007

9FC511D059EB7FCCAE41663D495E73275E942AEC 127.0.0.1:7007 Slave Cee383ab949eeb33d58aacde89c9cfb8eaa65eab 0 1451324745834 9 Connected

#5, delete a Slave node (format:./redis-trib.rb del-node Ip:port Node-id, with 7007 nodes as an example)

cd/data/soft/redis/src/

./redis-trib.rb del-node 127.0.0.1:7007 ' 9FC511D059EB7FCCAE41663D495E73275E942AEC '

#6, delete a master node (this is the case with 7006 nodes)

#6.1. Remove the master node first by using Reshard to remove all of the master slots

cd/data/soft/redis/src/

./redis-trib.rb Reshard 127.0.0.1:7006

#6.1.1. Select the number of slots to migrate according to the prompts (PS: Select 1000 here)

How many slots does want to move (from 1 to 16384)? 1000

#6.1.2. Select the Node-id (PS: 7000-node Node-id) to accept these slots

What is the receiving node ID? 721d0479cbd308eac871b2abe3b5805db80d2fe3

#6.1.3, select slot Source:

#all表示从所有的master重新分配,

#或者数据要提取slot的master节点id, End With Done (PS: Select the 7006-node slot you want to delete)

Please enter the source node IDs.

The Type ' All ' is the nodes as source nodes for the hash slots.

Type ' Done ' once your entered all the source nodes IDs.

Source node #1: Cee383ab949eeb33d58aacde89c9cfb8eaa65eab

Source node #2:d One

#6.1.4. After printing the slot that was moved, enter Yes to begin moving the slot and the corresponding data.

Do you want to proceed with the proposed Reshard plan (yes/no)? Yes

#6.2, delete empty 7006 nodes

cd/data/soft/redis/src/

./redis-trib.rb del-node 127.0.0.1:7006 ' Cee383ab949eeb33d58aacde89c9cfb8eaa65eab '

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Redis Cluster Common commands