redis 6.0 redis-cluster[通俗易懂]

On CentOS 7, you can install GCC 8 from Developer Toolset. First you need to enable the Software Collections repository:
yum install centos-release-scl

Then you can install GCC 8 and its C++ compiler:
yum install devtoolset-8-gcc devtoolset-8-gcc-c++

To switch to a shell which defaults gcc and g++ to this GCC version, use:
scl enable devtoolset-8 -- bash

You need to wrap all commands under the scl call, so that the process environment changes performed by this command affect all subshells. For example, you could use the scl command to invoke a shell script that performs the required actions.

代码100分

代码100分# Redis Cluster Proxy configuration file example.
# 如果指定以配置文件的方式启动，必须指定-c 参数
# ./redis-cluster-proxy -c /path/to/proxy.conf
 

################################## INCLUDES ###################################
# Include one or more other config files here.  Include files can include other files.
# 指定配置文件的路径
# If instead you are interested in using includes to override configuration options, it is better to use include as the last line.
# include /path/to/local.conf
# include /path/to/other.conf

######################## CLUSTER ENTRY POINT ADDRESS ##########################
# Indicate the entry point address in the same way it can be indicated in the
# redis cluster集群自身节点信息，这里是3主3从的6个节点，分别是192.168.0.61~192.168.0.66
# redis-cluster-proxy command line arguments.
# Note that it can be overridden by the command line argument itself.
# You can also specify multiple entry-points, by adding more lines, ie:
# cluster 127.0.0.1:7000
# cluster 127.0.0.1:7001
# You can also use the "entry-point" alias instead of cluster, ie:
# entry-point 127.0.0.1:7000
#
# cluster 127.0.0.1:7000
cluster 192.168.0.61:8888
cluster 192.168.0.62:8888
cluster 192.168.0.63:8888
cluster 192.168.0.64:8888
cluster 192.168.0.65:8888
cluster 192.168.0.66:8888


################################### MAIN ######################################
# Set the port used by Redis Cluster Proxy to listen to incoming connections
# redis-cluster-proxy 端口号指定
# from clients (default 7777)
port 7777
 
#  IP地址绑定，这里指定为redis-proxy-cluster所在节点的IP地址
# If you want you can bind a single interface, if the bind option is not
# specified all the interfaces will listen for incoming connections.
# You can also bind on multiple interfaces by declaring bind on multiple lines
#
# bind 127.0.0.1
bind 192.168.0.12
 
#  socket 文件路径
# Specify the path for the Unix socket that will be used to listen for
# incoming connections. There is no default, so Redis Cluster Proxy won"t
# listen on a Unix socket when not specified.
#
# unixsocket /path/to/proxy.socket

# Set the Unix socket file permissions (default 0)
#
# unixsocketperm 760
 
#  线程数量
# Set the number of threads.
threads 8

# Set the TCP keep-alive value on the Redis Cluster Proxy"s socket
#
# tcpkeepalive 300

# Set the TCP backlog on the Redis Cluster Proxy"s socket
#
# tcp-backlog 511

#  连接池信息
# Size of the connections pool used to provide ready-to-use sockets to
# private connections. The number (size) indicates the number of starting
# connections in the pool.
# Use 0 to disable connections pool at all.
# Every thread will have its pool of ready-to-use connections.
# When the proxy starts, every thread will populate a pool containing
# connections to all the nodes of the cluster.
# Whenever a client needs a private connection, it can take a connection
# from the pool, if available. This will speed-up the client transition from
# the thread"s shared connection to its own private connection, since the
# connection from the thread"s pool should be already connected and
# ready-to-use. Otherwise, clients with priovate connections must re-connect
# the the nodes of the cluster (this re-connection will act in a "lazy" way).
#
# connections-pool-size 10

# Minimum number of connections in the the pool. Below this value, the
# thread will start re-spawning connections at the defined rate until
# the pool will be full again.
#
# connections-pool-min-size 10

# Interval in milliseconds used to re-spawn connections in the pool.
# Whenever the number of connections in the pool drops below the minimum
# (see "connections-pool-min-size" above), the thread will start
# re-spawing connections in the pool, until the pool will be full again.
# New connections will be added at this specified interval.
#
# connections-pool-spawn-every 50

# Number of connections to re-spawn in the pool at every cycle that will
# happen with an interval defined by "connections-pool-spawn-every" (see above).
#
# connections-pool-spawn-rate 50
 
#  运行模式，一开始最好指定为no，运行时直接打印出来启动日志或者异常信息，这样可以方便地查看启动异常
#  非常奇怪的是：笔者一开始指定为yes，异常日志输出到文件，竟然跟直接打印日志输出的信息不一致
# Run Redis Cluster Proxy as a daemon.
daemonize yes
 
#  pid 文件指定
# If a pid file is specified, the proxy writes it where specified at startup
# and removes it at exit.
#
# When the proxy runs non daemonized, no pid file is created if none is
# specified in the configuration. When the proxy is daemonized, the pid file
# is used even if not specified, defaulting to
# "/var/run/redis-cluster-proxy.pid".
#
# Creating a pid file is best effort: if the proxy is not able to create it
# nothing bad happens, the server will start and run normally.
#
#pidfile /var/run/redis-cluster-proxy.pid


#  日志文件指定，如果可以正常启动，强烈建议指定一个输出日志文件，所有的运行异常或者错误都可以从日志中查找
# Specify the log file name. Also the empty string can be used to force
# Redis Cluster Porxy to log on the standard output. Note that if you use
# standard output for logging but daemonize, logs will be sent to /dev/null
#
#logfile ""
logfile "/usr/local/redis_cluster_proxy/redis_cluster_proxy.log"


#  跨slot操作，这里设置为yes，允许
# Enable cross-slot queries that can use multiple keys belonging to different
# slots or even different nodes.
# WARN: these queries will break the the atomicity deisgn of many Redis
# commands.
# NOTE: cross-slots queries are not supported by all the commands, even if
# this feature is enabled
#
# enable-cross-slot no
enable-cross-slot yes
 
# Maximum number of clients allowed
#
# max-clients 10000
 
# 连接到redis cluster时候的身份认证，如果redis集群节点设置了身份认证的话，强烈建议redis集群所有节点设置一个统一的auth
# Authentication password used to authenticate on the cluster in case its nodes
# are password-protected. The password will be used both for fetching cluster"s
# configuration and to automatically authenticate proxy"s internal connections
# to the cluster itself (both multiplexing shared connections and clients"
# private connections. So, clients connected to the proxy won"t need to issue
# the Redis AUTH command in order to be authenticated.
#
# auth mypassw
auth your_redis_cluster_password
 
#  这个节点是redis 6.0之后的用户名，这里没有指定
# Authentication username (supported by Redis >= 6.0)
#
# auth-user myuser

################################# LOGGING #####################################
# Log level: can be debug, info, success, warning o error.
log-level error

# Dump queries received from clients in the log (log-level debug required)
#
# dump-queries no

# Dump buffer in the log (log-level debug required)
#
# dump-buffer no

# Dump requests" queues (requests to send to cluster, request pending, ...)
# in the log (log-level debug required)
#
# dump-queues no