工具的作用：
1）比“cluster nodes”更为直观的显示结果
2）指出落在同一个IP上的master
3）指出落在同一个IP上的master和slave对
运行效果图：
源代码（可从 https://github.com/eyjian/redis-tools下载）：
点击(此处)折叠或打开
- #!/bin/bash
- # 源码位置：https://github.com/eyjian/redis-tools
- #
- # Redis集群部署注意事项：
- # 在一个物理IP上部署多个redis实例时，要避免：
- # 1) 一对master和slave出现在同一物理IP上（影响：物理机挂掉，部分keys彻底不可用）
- # 2) 同一物理IP上出现多个master（影响：物理机挂掉，将导致两对切换）
- #
- # 使用示例（带一个参数）：
- # show_redis_map.sh 192.168.0.21:6380
- #
- # 检查Redis集群master和slave映射关系的命令行工具：
- # 1) 查看是否多master出现在同一IP；
- # 2) 查看一对master和slave出现在同一IP。
- #
- # 当同一IP出现二个或多个master，则相应的行标星显示，
- # 如果一对master和slave出现在同一IP上，则相应的行标星显示。
- #
- # 输出效果：
- # [01][MASTER] 192.168.0.21:6379 00cc3f37d938ee8ba672bc77b71d8e0a3881a98b
- # [02][MASTER] 192.168.0.22:6379 1115713e3c311166207f3a9f1445b4e32a9202d7
- # [03][MASTER] 192.168.0.23:6379 5cb6946f46ccdf543e5a1efada6806f3df72b727
- # [04][MASTER] 192.168.0.24:6379 b91b1309b05f0dcc1e3a2a9521b8c00702999744
- # [05][MASTER] 192.168.0.25:6379 00a1ba8e5cb940ba4171e0f4415b91cea96977bc
- # [06][MASTER] 192.168.0.26:6379 64facb201cc5c7d8cdccb5fa211af5e1a04a9786
- # [07][MASTER] 192.168.0.27:6379 f119780359c0e43d19592db01675df2f776181b1
- # [08][MASTER] 192.168.0.28:6379 d374e28578967f96dcb75041e30a5a1e23693e56
- # [09][MASTER] 192.168.0.29:6380 a153d2071251657004dbe77abd10e2de7f0a209a
- #
- # [01][SLAVE=>MASTER] 192.168.0.21:6380 => 192.168.0.28:6379
- # [02][SLAVE=>MASTER] 192.168.0.22:6380 => 192.168.0.25:6379
- # [03][SLAVE=>MASTER] 192.168.0.23:6380 => 192.168.0.24:6379
- # [04][SLAVE=>MASTER] 192.168.0.24:6380 => 192.168.0.23:6379
- # [05][SLAVE=>MASTER] 192.168.0.25:6380 => 192.168.0.22:6379
- # [06][SLAVE=>MASTER] 192.168.0.26:6380 => 192.168.0.27:6379
- # [07][SLAVE=>MASTER] 192.168.0.27:6380 => 192.168.0.29:6380
- # [08][SLAVE=>MASTER] 192.168.0.28:6380 => 192.168.0.21:6379
- # [09][SLAVE=>MASTER] 192.168.0.29:6379 => 192.168.0.26:6379
- 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
- # 检查参数
- 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 $? -ne 0; then
- echo -e "\`redis-cli\` not exists or not executable"
- exit 1
- fi
- # master映射表，key为master的id，value为master的“ip:port”
- declare -A master_map=()
- # slave映表，key为master的id，value为slave的“ip:port”
- declare -A slave_map=()
- master_nodes_str=
- master_slave_maps_str=
- # 找出所有master
- masters=`$REDIS_CLI -h $REDIS_IP -p $REDIS_PORT CLUSTER NODES | awk -F[\ \@] '/master/{ printf("%s,%s\n",$1,$2); }' | sort`
- for master in $masters;
- do
- eval $(echo $master | awk -F[,] '{ printf("master_id=%s\nmaster_node=%s\n",$1,$2); }')
- master_map[$master_id]=$master_node
- if test -z "$master_nodes_str"; then
- master_nodes_str="$master_node|$master_id"
- else
- master_nodes_str="$master_node|$master_id,$master_nodes_str"
- fi
- done
- # 找出所有slave
- # “CLUSTER NODES”命令的输出格式当前有两个版本，需要awk需要根据NF的值做区分
- slaves=`$REDIS_CLI -h $REDIS_IP -p $REDIS_PORT CLUSTER NODES | awk -F[\ \@] '/slave/{ if (NF==9) printf("%s,%s\n",$5,$2); else printf("%s,%s\n",$4,$2); }' | sort`
- for slave in $slaves;
- do
- eval $(echo $slave | awk -F[,] '{ printf("master_id=%s\nslave_node=%s\n",$1,$2); }')
- slave_map[$master_id]=$slave_node
- done
- for key in ${!master_map[@]}
- do
- master_node=${master_map[$key]}
- slave_node=${slave_map[$key]}
- if test -z "$master_slave_maps_str"; then
- master_slave_maps_str="$slave_node|$master_node"
- else
- master_slave_maps_str="$slave_node|$master_node,$master_slave_maps_str"
- fi
- done
- # 显示所有master
- index=1
- old_master_node_ip=
- master_nodes_str=`echo "$master_nodes_str" | tr ',' '\n' | sort`
- for master_node_str in $master_nodes_str;
- do
- eval $(echo "$master_node_str" | awk -F[\|] '{ printf("master_node=%s\nmaster_id=%s\n", $1, $2); }')
- eval $(echo "$master_node" | awk -F[\:] '{ printf("master_node_ip=%s\nmaster_node_port=%s\n", $1, $2); }')
- tag=
- # 同一IP上出现多个master，标星
- if test "$master_node_ip" = "$old_master_node_ip"; then
- tag=" (*)"
- fi
- printf "[%02d][MASTER] %-20s \033[0;32;31m%s\033[m%s\n" $index "$master_node" "$master_id" "$tag"
- old_master_node_ip=$master_node_ip
- index=$((++index))
- done
- # 显示所有slave到master的映射
- index=1
- echo ""
- master_slave_maps_str=`echo "$master_slave_maps_str" | tr ',' '\n' | sort`
- for master_slave_map_str in $master_slave_maps_str;
- do
- eval $(echo "$master_slave_map_str" | awk -F[\|] '{ printf("slave_node=%s\nmaster_node=%s\n", $1, $2); }')
- eval $(echo "$slave_node" | awk -F[\:] '{ printf("slave_node_ip=%s\nslave_node_port=%s\n", $1, $2); }')
- eval $(echo "$master_node" | awk -F[\:] '{ printf("master_node_ip=%s\nmaster_node_port=%s\n", $1, $2); }')
- tag=
- # 一对master和slave出现在同一IP，标星
- if test ! -z "$slave_node_ip" -a "$slave_node_ip" = "$master_node_ip"; then
- tag=" (*)"
- fi
- n=$(($index % 2))
- if test $n -eq 0; then
- printf "[%02d][SLAVE=>MASTER] \033[1;33m%21s\033[m => \033[1;33m%s\033[m%s\n" $index $slave_node $master_node "$tag"
- else
- printf "[%02d][SLAVE=>MASTER] %21s => %s%s\n" $index $slave_node $master_node "$tag"
- fi
- index=$((++index))
- done
- echo ""
