Redis Sentinel Get Master IP

Redis Sentinel is a built-in Redis tool that adds high availability to the Redis database. It automatically monitors Redis database instances and can perform failover when necessary. The redis sentinel get master ip command is used to retrieve the IP address of the master instance in a Redis Sentinel setup.

Installation

Redis Sentinel is already installed if you have Redis version 2.8 or higher. If you need to install Redis, follow the instructions in the official Redis documentation.

Syntax

The syntax for redis sentinel get master ip is as follows:

redis-cli -p <sentinel_port> sentinel get-master-addr-by-name <master_name>

• sentinel_port: the port number of the Redis Sentinel instance
• master_name: the name of the Redis master instance

Example

Assuming sentinel_port is set to 26379 and master_name is set to mymaster, the command to retrieve the IP address of the master instance is:

redis-cli -p 26379 sentinel get-master-addr-by-name mymaster

This will return two values: the IP address of the master instance and its port number. To obtain only the IP address, use the following command:

redis-cli -p 26379 sentinel get-master-addr-by-name mymaster | awk '{print $1}'

This command uses the awk command to print only the first value (the IP address).

Conclusion

In conclusion, the redis sentinel get master ip command is a useful tool for retrieving the IP address of the master instance in a Redis Sentinel setup. With this command, you can quickly determine which instance is currently serving as the master, which is essential for maintaining high availability and ensuring the reliability of your Redis database.