查看Redis集群所有节点内存工具

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（可从下载）：

1. #!/bin/bash
2. # Query the memory of all nodes in a cluster
3. #
4. # Output example:
5. # $ ./query_redis_cluster.sh 192.168.0.31.21:6379
6. # [192.168.0.31.21:6379] Used: 788.57M Max: 15.00G System: 125.56G
7. # [192.168.0.31.22:6380] Used: 756.98M Max: 15.00G System: 125.56G
8. # [192.168.0.31.23:6380] Used: 743.93M Max: 15.00G System: 125.56G
9. # [192.168.0.31.24:6380] Used: 21.73M Max: 15.00G System: 125.56G
10. # [192.168.0.31.25:6380] Used: 819.11M Max: 15.00G System: 125.56G
11. # [192.168.0.31.24:6379] Used: 771.70M Max: 15.00G System: 125.56G
12. # [192.168.0.31.26:6379] Used: 920.77M Max: 15.00G System: 125.56G
13. # [192.168.0.31.27:6380] Used: 889.09M Max: 15.00G System: 125.27G
14. # [192.168.0.31.28:6379] Used: 741.24M Max: 15.00G System: 125.56G
15. # [192.168.0.31.29:6380] Used: 699.55M Max: 15.00G System: 125.56G
16. # [192.168.0.31.27:6379] Used: 752.89M Max: 15.00G System: 125.27G
17. # [192.168.0.31.21:6380] Used: 716.05M Max: 15.00G System: 125.56G
18. # [192.168.0.31.23:6379] Used: 784.82M Max: 15.00G System: 125.56G
19. # [192.168.0.31.26:6380] Used: 726.40M Max: 15.00G System: 125.56G
20. # [192.168.0.31.25:6379] Used: 726.09M Max: 15.00G System: 125.56G
21. # [192.168.0.31.29:6379] Used: 844.59M Max: 15.00G System: 125.56G
22. # [192.168.0.31.28:6380] Used: 14.00M Max: 15.00G System: 125.56G
23. # [192.168.0.31.22:6379] Used: 770.13M Max: 15.00G System: 125.56G
25. REDIS_CLI=${REDIS_CLI:-redis-cli}
26. REDIS_IP=${REDIS_IP:-127.0.0.1}
27. REDIS_PORT=${REDIS_PORT:-6379}
29. function usage()
30. {
31. echo "Usage: `basename $0` redis_node"
32. echo "Example: `basename $0` 127.0.0.1:6379"
33. }
35. # with a parameter: single redis node
36. if test $# -ne 1; then
37. usage
38. exit 1
39. fi
41. eval $(echo "$1" | awk -F[\:] '{ printf("REDIS_IP=%s\nREDIS_PORT=%s\n",$1,$2) }')
42. if test -z "$REDIS_IP" -o -z "$REDIS_PORT"; then
43. echo "Parameter error"
44. usage
45. exit 1
46. fi
48. # 确保redis-cli可用
49. which "$REDIS_CLI" > /dev/null 2>&1
50. if test $? -ne 0; then
51. echo "\`redis-cli\` not exists or not executable"
52. exit 1
53. fi
55. redis_nodes=`redis-cli -h $REDIS_IP -p $REDIS_PORT cluster nodes | awk -F[\ \:\@] '!/ERR/{ printf("%s:%s\n",$2,$3); }'`
56. if test -z "$redis_nodes"; then
57. # standlone
58. $REDIS_CLI -h $REDIS_IP -p $REDIS_PORT FLUSHALL
59. else
60. # cluster
61. for redis_node in $redis_nodes;
62. do
63. if test ! -z "$redis_node"; then
64. eval $(echo "$redis_node" | awk -F[\:] '{ printf("redis_node_ip=%s\nredis_node_port=%s\n",$1,$2) }')
66. if test ! -z "$redis_node_ip" -a ! -z "$redis_node_port"; then
67. items=(`$REDIS_CLI -h $redis_node_ip -p $redis_node_port INFO MEMORY 2>&1 | tr '\r' ' '`)
69. used_memory_rss_human=0
70. maxmemory_human=0
71. total_system_memory_human=0
72. for item in "${items[@]}"
73. do
74. eval $(echo "$item" | awk -F[\:] '{ printf("name=%s\nvalue=%s\n",$1,$2) }')
76. if test "$name" = "used_memory_rss_human"; then
77. used_memory_rss_human=$value
78. elif test "$name" = "maxmemory_human"; then
79. maxmemory_human=$value
80. elif test "$name" = "total_system_memory_human"; then
81. total_system_memory_human=$value
82. fi
83. done
85. echo -e "[\033[1;33m${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"
86. fi
87. fi
88. done
89. fi