Redis6.x.x build rediscluster cluster

2.1 Pull redis Mirror image

docker pull redis

3 Create a private network

3.1 Create a private network

establish docker Container's private network , It is convenient to set up a cluster , The network segment is 172.15.0.0 The network name is named redis_net1.(ps:

If you are reminded that the network segment is occupied , Please change to another network segment by yourself , Such as : 172.16.0.01172.17.0.0 ...)

docker network create --subnet=172.15.0.0/16 redis_net1

3.2 Check out the Internet

docker network inspect redis_net1

4 Create a directory in the host

4.1 Create directory /bizwork/redis-cluster

After the /bizwork/redis-cluster The configuration file and data are stored in the directory

mkdir -p /bizwork/redis-cluster

4.2 Get the configuration file ready

stay /bizwork/redis-cluster Under the table of contents create a file redis-cluster.tmpl

vim /bizwork/redis-cluster/redis-cluster.tmpl

Copy the following to redis-cluster.tmpl In file , We will use later

port ${PORT}

requirepass 1234

masterauth 1234

protected-mode no

daemonize no

appendonly yes

cluster-enabled yes

cluster-config-file nodes.conf

cluster-node-timeout 15000

cluster-announce-ip xx.xx.xx.xx # Your public network IP Or the Internet IP

cluster-announce-port ${PORT}

cluster-announce-bus-port 1${PORT}

bind 0.0.0.0

In the host machine /bizwork/redis-cluster Batch creation 8000~8005 Catalog , Used as a container mapping directory

for port in `seq 8000 8005`; do \

    mkdir -p ./${port}/conf \

    && PORT=${port} envsubst < ./redis-cluster.tmpl > ./${port}/conf/redis.conf \

    && mkdir -p ./${port}/data; \

done

Batch create container

for port in `seq 8000 8005`; do \

    docker run -d -ti -p ${port}:${port} -p 1${port}:1${port}  \

    -v /bizwork/redis-cluster/${port}/conf/redis.conf:/usr/local/etc/redis/redis.conf \

    -v /bizwork/redis-cluster/${port}/data:/data \

    --restart always --name redis-${port} --net redis_net1 \

    --sysctl net.core.somaxconn=1024 redis \

    redis-server /usr/local/etc/redis/redis.conf; 

done

View the network segment of each container

docker network inspect redis_net1 

Output results ：

[

    {

        "Name": "redis_net1",

        "Id": "01cf151982fdcfa6d59a1c0cf1f82e8778ea5caf55e4ef1101501485b402a5f2",

        "Created": "2020-12-31T15:17:28.223939985+08:00",

        "Scope": "local",

        "Driver": "bridge",

        "EnableIPv6": false,

        "IPAM": {

            "Driver": "default",

            "Options": {},

            "Config": [

                {

                    "Subnet": "172.15.0.0/16"

                }

            ]

        },

        "Internal": false,

        "Attachable": false,

        "Ingress": false,

        "ConfigFrom": {

            "Network": ""

        },

        "ConfigOnly": false,

        "Containers": {

            "2c908a8d54f9701858f774f0532304687b88b8327cac2e6b607cdf56652e3e58": {

                "Name": "redis-8002",

                "EndpointID": "c3866ce9080d1c446c2861280a15b89e53fef524dcba05623bdf9bc5cec74355",

                "MacAddress": "02:42:ac:0f:00:04",

                "IPv4Address": "172.15.0.4/16",

                "IPv6Address": ""

            },

            "9e73858fd0c192d5be38a5ee9a79650f109f3b669bbcb0e8fb7f3f5105931f85": {

                "Name": "redis-8001",

                "EndpointID": "ef52a366f26a45a06e2da4b4201955308df7379631c9d5dff35691df1cb66fe0",

                "MacAddress": "02:42:ac:0f:00:03",

                "IPv4Address": "172.15.0.3/16",

                "IPv6Address": ""

            },

            "aef661f9c8e16b490624b1fd4ed7883659addf7b1aacb13ef9c3b4737bb44a5c": {

                "Name": "redis-8005",

                "EndpointID": "c6e74a5a3de2da545d826097c44c686821c65f01164d35986629b9a1d0838cec",

                "MacAddress": "02:42:ac:0f:00:07",

                "IPv4Address": "172.15.0.7/16",

                "IPv6Address": ""

            },

            "c5320fc978908440ab52f05f821162c38baaebde4a72abce5e66d9827f7fc010": {

                "Name": "redis-8000",

                "EndpointID": "9b73ee6eb6dbd63722b0275471fde1cae2bd5907c60179fcbc25522ba0e84eb5",

                "MacAddress": "02:42:ac:0f:00:02",

                "IPv4Address": "172.15.0.2/16",

                "IPv6Address": ""

            },

            "c8ad19e2bd4bfe21968b0105d972ab0140707383a8e33a554c5b205df28953bd": {

                "Name": "redis-8003",

                "EndpointID": "4f84d1ff1cef06b267d97fd1904e11836333a7e6e51c687d849b8767dd1be7fe",

                "MacAddress": "02:42:ac:0f:00:05",

                "IPv4Address": "172.15.0.5/16",

                "IPv6Address": ""

            },

            "e002e46453501bdf3d7e9cd7d214db63fa981ab053cd5e5bdd10b9fb566839ac": {

                "Name": "redis-8004",

                "EndpointID": "cb36c1d2d8902e9d1c04599e86caf51a4d705960be7ac6e8a7b4b26a1175fbe5",

                "MacAddress": "02:42:ac:0f:00:06",

                "IPv4Address": "172.15.0.6/16",

                "IPv6Address": ""

            }

        },

        "Options": {},

        "Labels": {}

    }

]

Here we can see ：

• Containers redis-8000 The network segment is 172.15.0.2
• Containers redis-8001 The network segment is 172.15.0.3
• Containers redis-8002 The network segment is 172.15.0.4
• Containers redis-8003 The network segment is 172.15.0.5
• Containers redis-8004 The network segment is 172.15.0.6
• Containers redis-8005 The network segment is 172.15.0.7

5. Create clusters

Enter any container , I enter here redis-8000 Container to execute commands to create a cluster

docker exec -it redis-8000 bash

Use redis-cli --cluster create Command create cluster ( If the password is set , Password parameters are required ) As follows ：

redis-cli -a 1234 --cluster create 172.15.0.2:8000 172.15.0.3:8001 172.15.0.4:8002 172.15.0.5:8003 172.15.0.6:8004 172.15.0.7:8005 --cluster-replicas 1

common problem ：

Self built redis cluster The pit of tread , I hope it can save you time .

1、 The visit appears Redis： ERR unknown command 'CLUSTER'

After the cluster is configured for the project , Wrong interview ERR unknown command 'CLUSTER', as a result of `redis

cluster The server cluster was not set up successfully , I checked it again , The reason why it failed to build is my redis-8000 Of the container's configuration file cluster-config-file

node_8000.conf With... In other containers cluster-config-file node_8000.conf` identical

2、Redis Cannot use other libraries

Redis Cluster The cluster solution only supports one database （db 0）

3、SpringBoot Configuration cluster failed to start

2021-01-02 21:33:39.990 ERROR 10096 --- [isson-netty-2-7] o.r.cluster.ClusterConnectionManager     : Can't connect to master: redis://172.21.0.12:8000 with slot ranges: [[0-5460]]

2021-01-02 21:33:39.991 ERROR 10096 --- [isson-netty-2-8] o.r.cluster.ClusterConnectionManager     : Can't connect to master: redis://172.21.0.12:8002 with slot ranges: [[10923-16383]]

2021-01-02 21:33:39.990 ERROR 10096 --- [isson-netty-2-9] o.r.cluster.ClusterConnectionManager     : Can't connect to master: redis://172.21.0.12:8001 with slot ranges: [[5461-10922]]