查看Redis集群所有节点内存工具

╰+攻爆jí腚メ 2022-05-14 04:40 288阅读 0赞

指定集群中任意一个节点，查看集群中所有节点当前已用物理内存、配置的最大物理内存和系统物理内存。  
  
源码（可从[https://github.com/eyjian/redis-tools][https_github.com_eyjian_redis-tools]下载）：

#!/bin/bash
    # Query the memory of all nodes in a cluster
    #
    # Output example:
    # $ ./query_redis_cluster.sh 192.168.0.31.21:6379
    # [192.168.0.31.21:6379]  Used: 788.57M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.22:6380]  Used: 756.98M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.23:6380]  Used: 743.93M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.24:6380]  Used: 21.73M    Max: 15.00G    System: 125.56G
    # [192.168.0.31.25:6380]  Used: 819.11M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.24:6379]  Used: 771.70M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.26:6379]  Used: 920.77M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.27:6380]  Used: 889.09M   Max: 15.00G    System: 125.27G
    # [192.168.0.31.28:6379]  Used: 741.24M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.29:6380]  Used: 699.55M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.27:6379]  Used: 752.89M   Max: 15.00G    System: 125.27G
    # [192.168.0.31.21:6380]  Used: 716.05M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.23:6379]  Used: 784.82M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.26:6380]  Used: 726.40M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.25:6379]  Used: 726.09M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.29:6379]  Used: 844.59M   Max: 15.00G    System: 125.56G
    # [192.168.0.31.28:6380]  Used: 14.00M    Max: 15.00G    System: 125.56G
    # [192.168.0.31.22:6379]  Used: 770.13M   Max: 15.00G    System: 125.56G
    
    REDIS_CLI=${REDIS_CLI:-redis-cli}
    REDIS_IP=${REDIS_IP:-127.0.0.1}
    REDIS_PORT=${REDIS_PORT:-6379}
    
    function usage()
    {
        echo "Usage: `basename $0` redis_node"    
        echo "Example: `basename $0` 127.0.0.1:6379"    
    }
    
    # with a parameter: single redis node
    if test $# -ne 1; then    
        usage
        exit 1
    fi
    
    eval $(echo "$1" | awk -F[\:] '{ printf("REDIS_IP=%s\nREDIS_PORT=%s\n",$1,$2) }')
    if test -z "$REDIS_IP" -o -z "$REDIS_PORT"; then
        echo "Parameter error"
        usage
        exit 1
    fi
    
    # 确保redis-cli可用
    which "$REDIS_CLI" > /dev/null 2>&1
    if test $? -ne 0; then
        echo "\`redis-cli\` not exists or not executable"
        exit 1
    fi
    
    redis_nodes=`redis-cli -h $REDIS_IP -p $REDIS_PORT cluster nodes | awk -F[\ \:\@] '!/ERR/{ printf("%s:%s\n",$2,$3); }'`
    if test -z "$redis_nodes"; then
        # standlone
        $REDIS_CLI -h $REDIS_IP -p $REDIS_PORT FLUSHALL
    else
        # cluster
        for redis_node in $redis_nodes;
        do
            if test ! -z "$redis_node"; then
                eval $(echo "$redis_node" | awk -F[\:] '{ printf("redis_node_ip=%s\nredis_node_port=%s\n",$1,$2) }')
    
                if test ! -z "$redis_node_ip" -a ! -z "$redis_node_port"; then                
                    items=(`$REDIS_CLI -h $redis_node_ip -p $redis_node_port INFO MEMORY 2>&1 | tr '\r' ' '`)
    
                    used_memory_rss_human=0
                    maxmemory_human=0
                    total_system_memory_human=0
                    for item in "${items[@]}"
                    do
                        eval $(echo "$item" | awk -F[\:] '{ printf("name=%s\nvalue=%s\n",$1,$2) }')
    
                        if test "$name" = "used_memory_rss_human"; then
                            used_memory_rss_human=$value
                        elif test "$name" = "maxmemory_human"; then
                            maxmemory_human=$value
                        elif test "$name" = "total_system_memory_human"; then
                            total_system_memory_human=$value
                        fi
                    done
    
                    echo -e "[\033[1;33m${redis_node_ip}:${redis_node_port}\033[m]\tUsed: \033[0;32;32m$used_memory_rss_human\033[m\tMax: \033[0;32;32m$maxmemory_human\033[m\tSystem: \033[0;32;32m$total_system_memory_human\033[m"        
                fi
            fi
        done
    fi

[https_github.com_eyjian_redis-tools]: https://github.com/eyjian/redis-tools