Automatic failover in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check the role of a Redis node.

Redis

[1]

Drag options to blanks, or click blank then click option'

AINFO

BROLE

CPING

DCONFIG

Attempts:

3 left

💡 Hint

Common Mistakes

Using INFO instead of ROLE

Using PING which only checks connectivity

The ROLE command returns the role of the Redis node (master, slave, or sentinel).

2fill in blank

medium

Complete the command to failover a Redis slave to master.

Redis

SLAVEOF [1] [2]

Drag options to blanks, or click blank then click option'

ANO

B127.0.0.1

CONE

Dlocalhost

Attempts:

3 left

💡 Hint

Common Mistakes

Using IP address instead of NO ONE

Using a port number instead of ONE

The command SLAVEOF NO ONE makes the slave become master.

3fill in blank

hard

Fix the error in the command to trigger a manual failover in Redis Sentinel.

Redis

SENTINEL [1] mymaster

Drag options to blanks, or click blank then click option'

Afailovered

Bfailovering

Cfailover

Dfailovers

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'failovering' or 'failovered' which are invalid commands

The correct command to trigger a manual failover in Redis Sentinel is SENTINEL failover <master-name>.

4fill in blank

hard

Fill both blanks to configure Redis Sentinel to monitor a master.

Redis

SENTINEL MONITOR [1] [2] 6379 2

Drag options to blanks, or click blank then click option'

Amymaster

B127.0.0.1

C192.168.1.100

Dlocalhost

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'localhost' instead of the actual IP

Using wrong master name

The SENTINEL MONITOR command requires the master name and IP address. Here, 'mymaster' is the master name and '192.168.1.100' is the IP.

5fill in blank

hard

Fill all three blanks to check the current master of a monitored Redis master in Sentinel.

Redis

SENTINEL [1] | grep {{BLANK_3}}

Drag options to blanks, or click blank then click option'

Amasters

Bmymaster

Cname

Dslaves

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'slaves' instead of 'masters'

Using wrong grep keyword

The command SENTINEL masters mymaster lists masters, and piping to grep name filters the master name.