Shulou(Shulou.com)06/03 Report--

Preface

The so-called cluster is to add the number of servers to provide the same services, so as to make the servers achieve a stable and efficient state. Instability exists in a single redis. When the redis service goes down, there are no services available. Redis clusters are designed to enhance the reading and writing ability of redis. In a redis cluster, each redis is called a node. In a redis cluster, there are two types of nodes: master node (master) and slave node (slave). Redis cluster is based on redis master-slave replication.

Environment

Simulate 6 servers with two servers (add network card)

Primary server Redis1:

Ens33: 192.168.52.150

Ens36: 192.168.52.153

Ens37: 192.168.52.154

Redis2 from the server:

Ens33: 192.168.52.148

Ens36: 192.168.52.155

Ens37: 192.168.52.156

Install Redis on both servers

[root@localhost ~] # yum install gcc gcc-c++ make-y # # install environment components

[root@localhost ~] # mkdir / mnt/tools

[root@localhost ~] # mount.cifs / / 192.168.100.100/tools / mnt/tools/ # # Mount

Password for root@//192.168.100.100/tools:

[root@localhost ~] # cd / mnt/tools/redis/

[root@localhost redis] # ls

Redis-5.0.7.tar.gz

[root@localhost redis] # tar xf redis-5.0.7.tar.gz-C / opt/ # # decompress

[root@localhost redis] # cd / opt/

[root@localhost opt] # ls

Redis-5.0.7 rh

[root@localhost opt] # cd redis-5.0.7/

[root@localhost redis-5.0.7] # make # # compile

[root@localhost redis-5.0.7] # make PREFIX=/usr/local/redis/ install # # installation

[root@localhost redis-5.0.7] # cd utils/

[root@localhost utils] #. / install_server.sh # # execute script to configure

Welcome to the redis service installer

This script will help you easily set up a running redis server

Please select the redis port for this instance: [6379] # # default port

Selecting default: 6379

Please select the redis config file name [/ etc/redis/6379.conf] # # configuration file

Selected default-/ etc/redis/6379.conf

Please select the redis log file name [/ var/log/redis_6379.log] # # Log File

Selected default-/ var/log/redis_6379.log

Please select the data directory for this instance [/ var/lib/redis/6379] # # data file

Selected default-/ var/lib/redis/6379

Please select the redis executable path [] / usr/local/redis/bin/redis-server

# # Executable File path

Selected config:

Port: 6379

Config file: / etc/redis/6379.conf

Log file: / var/log/redis_6379.log

Data dir: / var/lib/redis/6379

Executable: / usr/local/redis/bin/redis-server

Cli Executable: / usr/local/redis/bin/redis-cli

Is this ok? Then press ENTER to go on or Ctrl-C to abort.

Copied / tmp/6379.conf = > / etc/init.d/redis_6379

Installing service...

Successfully added to chkconfig!

Successfully added to runlevels 345!

Starting Redis server...

Installation successful!

[root@localhost utils] # ln-s / usr/local/redis/bin/ / usr/local/bin/ # # easy for system identification

[root@localhost utils] # netstat-ntap | grep 6379

Tcp 0 0 127.0.0.1:6379 0.0.0.0: LISTEN 44510/redis-server

Modify the configuration file on both servers

[root@localhost utils] # vim / etc/redis/6379.conf

# bind 127.0.0.1 # # the listening address of line 70 of the note, all addresses have been monitored

Protected-mode no # # remove line 89 comment and turn off security

Port 6379 # # remove line 93 comment and open port 6379

Daemonize yes # # uncomment line 137 and start as a stand-alone process

Cluster-enabled yes # # remove the comment on line 833 and enable the cluster function

Cluster-config-file nodes-6379.conf # # remove comments on line 841, cluster name file settings

Cluster-node-timeout 15000 # # remove the comment on line 847 and set the cluster timeout

Appendonly yes # # uncomment line 700 and enable aof persistence

[root@localhost utils] # / etc/init.d/redis_6379 restart # # restart the service

Stopping...

Redis stopped

Starting Redis server...

[root@localhost utils] # cd / var/lib/redis/6379/

[root@localhost 6379] # ls

Appendonly.aof dump.rdb nodes-6379.conf # # generate aof,rdb and node files

Install rvm,Ruby control cluster software on the primary server

[root@localhost utils] # gpg-keyserver hkp://keys.gnupg.net-recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

# # Import key File

Gpg: directory'/ root/.gnupg' created

Gpg: a new profile'/ root/.gnupg/gpg.conf' has been established

Gpg: warning: the options in'/ root/.gnupg/gpg.conf' were not used during this run

Gpg: key ring'/ root/.gnupg/secring.gpg' established

Gpg: key ring'/ root/.gnupg/pubring.gpg' established

Gpg: download the key 'D39DC0E3', keys.gnupg.net from the hkp server

Gpg: / root/.gnupg/trustdb.gpg: established the database of trust degree

Gpg: key D39DC0E3: public key "Michal Papis (RVM signing)" has been imported

Gpg: no absolutely trusted keys were found

Gpg: total number of processed: 1

Gpg: imported: 1 (RSA: 1)

[root@localhost utils] # curl-sSL https://get.rvm.io | bash-s stable # # install rvm

.. / / omit the process

[root@localhost utils] # source / etc/profile.d/rvm.sh # # execute environment variables

[root@localhost utils] # rvm list known # # list the versions of ruby that can be installed

[root@localhost utils] # rvm install 2.4.1 # # install version 2.4.1

[root@localhost utils] # rvm use 2.4.1 # # use rubyruby2.4.1 version

Using / usr/local/rvm/gems/ruby-2.4.1

[root@localhost utils] # ruby-v # # View the current ruby2.4.1 version

Ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux]

[root@localhost utils] # gem install redis # install Redis again

Fetching redis-4.1.3.gem

Successfully installed redis-4.1.3

Parsing documentation for redis-4.1.3

Installing ri documentation for redis-4.1.3

Done installing documentation for redis after 1 seconds

1 gem installed

[root@localhost utils] #

Add two network cards to the primary server

[root@localhost utils] # service network restart # # restart the Nic

[root@localhost utils] # systemctl stop firewalld.service # # turn off the firewall

[root@localhost utils] # setenforce 0

[root@localhost utils] # ifconfig

Ens33: flags=4163 mtu 1500

Inet 192.168.52.150 netmask 255.255.255.0 broadcast 192.168.52.255

Inet6 fe80::5134:22f5:842b:5201 prefixlen 64 scopeid 0x20

Ether 00:0c:29:0d:f1:75 txqueuelen 1000 (Ethernet)

RX packets 91575 bytes 119014065 (113.5 MiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 28442 bytes 2443621 (2.3 MiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Ens36: flags=4163 mtu 1500

Inet 192.168.52.153 netmask 255.255.255.0 broadcast 192.168.52.255

Inet6 fe80::84f1:53d8:a97a:d450 prefixlen 64 scopeid 0x20

Ether 00:0c:29:0d:f1:89 txqueuelen 1000 (Ethernet)

RX packets 128 bytes 18873 (18.4 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 42 bytes 6253 (KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Ens37: flags=4163 mtu 1500

Inet 192.168.52.154 netmask 255.255.255.0 broadcast 192.168.52.255

Inet6 fe80::74f5:2344:c59b:4fdb prefixlen 64 scopeid 0x20

Ether 00:0c:29:0d:f1:7f txqueuelen 1000 (Ethernet)

RX packets 107 bytes 16849 (16.4 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 29 bytes 4601 (4.4 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Add two network cards to the slave server as well

[root@slave utils] # service network restart # # restart the Nic

[root@slave utils] # systemctl stop firewalld.service # # turn off the firewall

[root@slave utils] # setenforce 0

[root@localhost utils] # ifconfig

Ens33: flags=4163 mtu 1500

Inet 192.168.52.148 netmask 255.255.255.0 broadcast 192.168.52.255

Inet6 fe80::c776:9d00:618:88f2 prefixlen 64 scopeid 0x20

Ether 00:0c:29:37:e9:25 txqueuelen 1000 (Ethernet)

RX packets 65481 bytes 86357533 (82.3 MiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 21069 bytes 1892475 (1.8 MiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Ens36: flags=4163 mtu 1500

Inet 192.168.52.155 netmask 255.255.255.0 broadcast 192.168.52.255

Inet6 fe80::d3e5:cd6b:26f8:fd1f prefixlen 64 scopeid 0x20

Ether 00:0c:29:37:e9:39 txqueuelen 1000 (Ethernet)

RX packets 143bytes 17342 (16.9 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 38 bytes 5940 (5.8 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Ens37: flags=4163 mtu 1500

Inet 192.168.52.156 netmask 255.255.255.0 broadcast 192.168.52.255

Inet6 fe80::222b:77ad:8da2:4ea6 prefixlen 64 scopeid 0x20

Ether 00:0c:29:37:e9:2f txqueuelen 1000 (Ethernet)

RX packets 114bytes 14481 (14.1 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 30 bytes 4661 (4.5 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Create a cluster on the master server

# # 6 instances are divided into three groups, each with one master and one slave

[root@localhost utils] # redis-cli-- cluster create 192.168.52.150 cluster create 6379 192.168.52.153 cluster-replicas 6379 192.168.52.154Rose 6379 192.168.52.1481979 192.168.52.1551979

# # create a cluster with one master and one slave for each group

Performing hash slots allocation on 6 nodes...

Master [0]-> Slots 0-5460

Master [1]-> Slots 5461-10922

Master [2]-> Slots 10923-16383

Adding replica 192.168.52.155:6379 to 192.168.52.150:6379

Adding replica 192.168.52.156:6379 to 192.168.52.153:6379

Adding replica 192.168.52.148:6379 to 192.168.52.154:6379

M: b9dfae79d92141a7bad172a344e0696f356a875f 192.168.52.150:6379

Slots: [0-16383] (5461 slots) master # # 128129135

M: b9dfae79d92141a7bad172a344e0696f356a875f 192.168.52.153:6379

Slots: [0-16383] (5462 slots) master

M: b9dfae79d92141a7bad172a344e0696f356a875f 192.168.52.154:6379

Slots: [0-16383] (5461 slots) master

S: ebc69ee01cf293b3af9930cac2dba03b4475336b 192.168.52.148:6379

Replicates b9dfae79d92141a7bad172a344e0696f356a875f # # 136137138 is a copy

S: ebc69ee01cf293b3af9930cac2dba03b4475336b 192.168.52.155:6379

Replicates b9dfae79d92141a7bad172a344e0696f356a875f

S: ebc69ee01cf293b3af9930cac2dba03b4475336b 192.168.52.156:6379

Replicates b9dfae79d92141a7bad172a344e0696f356a875f

...

Can I set the above configuration? (type 'yes' to accept): yes # # Select 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 192.168.52.150 purl 6379)

M: b9dfae79d92141a7bad172a344e0696f356a875f 192.168.52.150:6379

Slots: [0-16383] (16384 slots) master

1 additional replica (s)

S: ebc69ee01cf293b3af9930cac2dba03b4475336b 192.168.52.155:6379

Slots: (0 slots) slave

Replicates b9dfae79d92141a7bad172a344e0696f356a875f

[OK] All nodes agree about slots configuration.

Check for open slots...

Check slots coverage...

[OK] All 16384 slots covered.

[root@localhost utils] #

Verify the principle of cluster read and write

[root@localhost utils] # redis-cli-h 192.168.52.150-p 6379 # # Master Server

192.168.52.150 6379 > set name zhangsan # # create key-value pairs

OK

192.168.52.150VR 6379 > keys

1) "name"

192.168.52.150VR 6379 > get name

"zhangsan"

192.168.52.150VR 6379 > exit

[root@localhost utils] # redis-cli-h 192.168.52.148-p 6379 # # from the server

192.168.52.148 6379 > keys # # View is also available from above.

1) "name"

192.168.52.148purl 6379 > get name

"zhangsan"

192.168.52.148purl 6379 > exit

[root@localhost utils] #

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