redis关于NAT网络环境的配置
在redis的配置文件示例中, 有这么一段关于集群运行在NAT环境下的表述。
简单来讲，为了组成redis 集群拓扑，需要在配置中暴露节点最终的网络环境的静态信息。
redis 6.0 配置地址
########################## CLUSTER DOCKER/NAT support ########################
# In certain deployments, Redis Cluster nodes address discovery fails, because
# addresses are NAT-ted or because ports are forwarded (the typical case is
# Docker and other containers).
#
# In order to make Redis Cluster working in such environments, a static
# configuration where each node knows its public address is needed. The
# following two options are used for this scope, and are:
#
# * cluster-announce-ip
# * cluster-announce-port
# * cluster-announce-bus-port
#
# Each instructs the node about its address, client port, and cluster message
# bus port. The information is then published in the header of the bus packets
# so that other nodes will be able to correctly map the address of the node
# publishing the information.
#
# If the above options are not used, the normal Redis Cluster auto-detection
# will be used instead.
#
# Note that when remapped, the bus port may not be at the fixed offset of
# clients port + 10000, so you can specify any port and bus-port depending
# on how they get remapped. If the bus-port is not set, a fixed offset of
# 10000 will be used as usual.
#
# Example:
#
# cluster-announce-ip 10.1.1.5
# cluster-announce-port 6379
# cluster-announce-bus-port 6380
docker-compose
参考上面的表述，在docker-compose.yaml中可以配置REDIS_CLUSTER_ANNOUNCE_IP为最终外部网络地址，启用redis-node-0~5六个节点，并且为了最终网络地址可知，构建虚拟网络，分配静态ip，最终使用redis-cluster-init进行集群拓扑的搭建，即使用官网的镜像，使用redis-cli执行以下命令。
redis-cli -a Lucky2021 --cluster create 172.22.0.100:7000 172.22.0.101:7001 172.22.0.102:7002 172.22.0.103:7003 172.22.0.104:7004 172.22.0.105:7005 --cluster-replicas 1 --cluster-yes
docker-compose.yaml完整实例
执行 docker-compose up -d 启动集群
version: '3.8'
services:
redis-node-0:
image: bitnami/redis-cluster
container_name: redis-node-0
restart: always
networks:
redis:
ipv4_address: 172.22.0.100
hostname: redis-node-0
environment:
- 'REDIS_PORT_NUMBER=7000'
- 'REDIS_PASSWORD=Lucky2021'
- 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5'
- 'REDIS_CLUSTER_ANNOUNCE_PORT=7000'
- 'REDIS_CLUSTER_ANNOUNCE_IP=192.168.68.92'
- 'REDIS_CLUSTER_BUS_ANNOUNCE_PORT=17000'
- 'REDIS_CLUSTER_DYNAMIC_IPS=no'
ports:
- "7000:7000"
- "17000:17000"
redis-node-1:
image: bitnami/redis-cluster
container_name: redis-node-1
restart: always
networks:
redis:
ipv4_address: 172.22.0.101
hostname: redis-node-1
environment:
- 'REDIS_PORT_NUMBER=7001'
- 'REDIS_PASSWORD=Lucky2021'
- 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5'
- 'REDIS_CLUSTER_ANNOUNCE_PORT=7001'
- 'REDIS_CLUSTER_ANNOUNCE_IP=192.168.68.92'
- 'REDIS_CLUSTER_BUS_ANNOUNCE_PORT=17001'
- 'REDIS_CLUSTER_DYNAMIC_IPS=no'
ports:
- "7001:7001"
- "17001:17001"
redis-node-2:
image: bitnami/redis-cluster
container_name: redis-node-2
restart: always
networks:
redis:
ipv4_address: 172.22.0.102
hostname: redis-node-2
environment:
- 'REDIS_PORT_NUMBER=7002'
- 'REDIS_PASSWORD=Lucky2021'
- 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5'
- 'REDIS_CLUSTER_ANNOUNCE_PORT=7002'
- 'REDIS_CLUSTER_ANNOUNCE_IP=192.168.68.92'
- 'REDIS_CLUSTER_BUS_ANNOUNCE_PORT=17002'
- 'REDIS_CLUSTER_DYNAMIC_IPS=no'
ports:
- "7002:7002"
- "17002:17002"
redis-node-3:
image: bitnami/redis-cluster
container_name: redis-node-3
restart: always
networks:
redis:
ipv4_address: 172.22.0.103
hostname: redis-node-3
environment:
- 'REDIS_PORT_NUMBER=7003'
- 'REDIS_PASSWORD=Lucky2021'
- 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5'
- 'REDIS_CLUSTER_ANNOUNCE_PORT=7003'
- 'REDIS_CLUSTER_ANNOUNCE_IP=192.168.68.92'
- 'REDIS_CLUSTER_BUS_ANNOUNCE_PORT=17003'
- 'REDIS_CLUSTER_DYNAMIC_IPS=no'
ports:
- "7003:7003"
- "17003:17003"
redis-node-4:
image: bitnami/redis-cluster
container_name: redis-node-4
restart: always
networks:
redis:
ipv4_address: 172.22.0.104
hostname: redis-node-4
environment:
- 'REDIS_PORT_NUMBER=7004'
- 'REDIS_PASSWORD=Lucky2021'
- 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5'
- 'REDIS_CLUSTER_ANNOUNCE_PORT=7004'
- 'REDIS_CLUSTER_ANNOUNCE_IP=192.168.68.92'
- 'REDIS_CLUSTER_BUS_ANNOUNCE_PORT=17004'
- 'REDIS_CLUSTER_DYNAMIC_IPS=no'
ports:
- "7004:7004"
- "17004:17004"
redis-node-5:
image: bitnami/redis-cluster
container_name: redis-node-5
restart: always
networks:
redis:
ipv4_address: 172.22.0.105
hostname: redis-node-5
environment:
- 'REDIS_PORT_NUMBER=7005'
- 'REDIS_PASSWORD=Lucky2021'
- 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5'
- 'REDIS_CLUSTER_ANNOUNCE_PORT=7005'
- 'REDIS_CLUSTER_ANNOUNCE_IP=192.168.68.92'
- 'REDIS_CLUSTER_BUS_ANNOUNCE_PORT=17005'
- 'REDIS_CLUSTER_DYNAMIC_IPS=no'
ports:
- "7005:7005"
- "17005:17005"
redis-cluster-init:
image: redis:6.2
container_name: redis-cluster-init
restart: 'no'
networks:
redis:
ipv4_address: 172.22.0.106
depends_on:
- redis-node-0
- redis-node-1
- redis-node-2
- redis-node-3
- redis-node-4
- redis-node-5
entrypoint: []
command:
- /bin/bash
- -c
- redis-cli -a Lucky2021 --cluster create 172.22.0.100:7000 172.22.0.101:7001 172.22.0.102:7002 172.22.0.103:7003 172.22.0.104:7004 172.22.0.105:7005 --cluster-replicas 1 --cluster-yes
networks:
redis:
driver: bridge
ipam:
config:
- subnet: 172.22.0.0/16
gateway: 172.22.0.1
