原文地址 血的教训啊~要引以为戒
危险命令有哪些???
Redis 的危险命令主要有以下几个:
-
keys
客户端可查询出所有存在的键。对 Redis 稍微有点使用经验的人都知道线上是不能执行 keys *
相关命令的,虽然其模糊匹配功能使用非常方便也很强大,在小数据量情况下使用没什么问题,数据量大会导致 Redis 锁住及 CPU 飙升,在生产环境建议禁用或者重命名!
-
flushdb
Delete all the keys of the currently selected DB. This command never fails.
删除 Redis 中当前所在数据库中的所有记录,并且此命令从不会执行失败。
-
flushall
Delete all the keys of all the existing databases, not just the currently selected one. This command never fails.
删除 Redis 中所有数据库中的所有记录,不只是当前所在数据库,并且此命令从不会执行失败。
-
config
客户端可修改 Redis 配置。
怎么禁用或重命名危险命令?
看下 redis.conf
默认配置文件,找到 SECURITY
区域,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.
看说明,添加 rename-command
配置即可达到安全目的。
1)禁用命令
rename-command KEYS ""
rename-command FLUSHALL ""
rename-command FLUSHDB ""
rename-command CONFIG ""
2)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 可以定义新命令名称,或者用随机字符代替。
经过以上的设置之后,危险命令就不会被客户端执行了。