一: Redis線上不能使用危險的命令

1:keys *

雖然其模糊匹配功能使用非常方便也很強大，在小數據量情況下使用沒什么問題，數據量大會導致 Redis 鎖住及 CPU 飆升，在生產環境建議禁用或者重命名！

2:flushdb

刪除 Redis 中當前所在數據庫中的所有記錄，并且此命令從不會執行失敗

3:flushall

刪除 Redis 中所有數據庫中的所有記錄，不只是當前所在數據庫，并且此命令從不會執行失敗。

4:config

客戶端可修改 Redis 配置。

二:如何禁用或者重命名危險命令

1:看下 redis.conf 默認配置文件，找到 SECURITY 區域，如以下所示:

################################## SECURITY #################################### Require clients to issue AUTH <PASSWORD> before processing any other # commands. This might be useful in environments in which you do not trust # others with access to the host running redis-server. # # This should stay commented out for backward compatibility and because most # people do not need auth (e.g. they run their own servers). # # Warning: since Redis is pretty fast an outside user can try up to # 150k passwords per second against a good box. This means that you should # use a very strong password otherwise it will be very easy to break. # # requirepass foobared# Command renaming. # # It is possible to change the name of dangerous commands in a shared # environment. For instance the CONFIG command may be renamed into something # hard to guess so that it will still be available for internal-use tools # but not available for general clients. # # Example: # # rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52 # # It is also possible to completely kill a command by renaming it into # an empty string: # # rename-command CONFIG "" # # Please note that changing the name of commands that are logged into the # AOF file or transmitted to slaves may cause problems.

看說明，添加 rename-command 配置即可達到安全目的。

2:禁用命令

rename-command KEYS "" rename-command FLUSHALL "" rename-command FLUSHDB "" rename-command CONFIG ""

3:重命名命令

rename-command KEYS "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" rename-command FLUSHALL "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" rename-command FLUSHDB "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" rename-command CONFIG "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"

上面的 XX 可以定義新命令名稱，或者用隨機字符代替。
經過以上的設置之后，危險命令就不會被客戶端執行了

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總結

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