envoy代理redis-cluster

• Redis-Cluser架构设计

  1. Redis-Cluser采用无中心结构，每个节点都保存数据和整个集群状态，各个节点之间互相链接
  2. 节点间采用ping-pong机制互联，内部使用二进制协议传输优化速度和带宽
  3. Redis-Cluser会把所有物理节点映射到0-16383个slot上
  4. Redis集群预分好16384个桶，当需要在 Redis 集群中放置一个 key-value 时，根据 CRC16(key) mod 16384的值，决定将一个key放到哪个桶中
     

• 部署Redis-Cluser 3节点(一个副本)

  1. redis配置

  daemonize yes
  port 7006
  cluster-enabled yes
  cluster-config-file "nodes.conf"
  cluster-node-timeout 15000
  appendonly yes
  protected-mode no
  bind 0.0.0.0
  masterauth "westos"
  requirepass westos

  1. 启动redis执行集群创建

redis-cli --cluster create 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006 --cluster-replicas 1

• envoy配置

static_resources:
  listeners:
  - name: redis_listener
    address:
      socket_address:
        address: 0.0.0.0
        port_value: 1999
    filter_chains:
    - filters:
      - name: envoy.filters.network.redis_proxy
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.filters.network.redis_proxy.v3.RedisProxy
          stat_prefix: egress_redis
          settings:
            op_timeout: 5s
          prefix_routes:
            catch_all_route:
              cluster: redis_cluster
  clusters:
  - name: redis_cluster
    connect_timeout: 1s
    type: strict_dns # static
    lb_policy: MAGLEV
    typed_extension_protocol_options:
      envoy.redis_proxy:
        "@type": type.googleapis.com/google.protobuf.Struct
        value:
          auth_password:
            inline_string: "westos"
    load_assignment:
      cluster_name: redis_cluster
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: 10.0.2.15
                port_value: 7001
        - endpoint:
            address:
              socket_address:
                address: 10.0.2.15
                port_value: 7002
        - endpoint:
            address:
              socket_address:
                address: 10.0.2.15
                port_value: 7003
        - endpoint:
            address:
              socket_address:
                address: 10.0.2.15
                port_value: 7004
        - endpoint:
            address:
              socket_address:
                address: 10.0.2.15
                port_value: 7005
        - endpoint:
            address:
              socket_address:
                address: 10.0.2.15
                port_value: 7006
admin:
  access_log_path: "/dev/null"
  address:
    socket_address:
      address: 0.0.0.0
      port_value: 8001

• 启动envoy

envoy -c envoy.yaml -l debug --service-cluster proxy