A presentation for a complete understanding of Redis, its setup types, and their complexity. How we can do a performance-based secure setup on the Kubernetes platform using the Redis Operator?
https://github.com/OT-CONTAINER-KIT/redis-operator
2. Agenda
➔ Redis Quiz
➔ Redis Overview
➔ Setup of Redis
➔ Scaling in Redis
➔ Observability of Redis
3. Redis Overview
Q1 - According to your understanding, what do you mean by Redis?
A. It’s a NoSQL database B. It’s a caching
system
C. It’s a SQL
database.
D. Both A and B
D. Both A and B
4. Redis Overview
Q2 - What are the different type of Redis setup are possible?
● Standalone setup
● Replicated cluster
setup
● Sharded cluster setup
5. Redis Overview
Q2 - Can we use Redis as a system with the traditional SQL databases?
A. True B. False
A. True
6. Redis Overview
In-Memory Database Data stored on system/server’s memory
Usage of Redis Often used as Cache to improve performance
Redis can also be used as full fledged database
as well.
Application Redis Database
7. Usage of Redis
Client Application Redis MySQL DB
1. Looks in cache system.
3. Cache the
new data
Cache hit simply
return the data.
2. Cache miss will look into the main
persistent database.
8. Key Properties of Redis
In-Memory Database Fast and Performant Schemaless
14. Replication + Sharding
Leader 1
A B
Leader 2
C D
Leader 3
E F
Follower 1
A B
Follower 2
C D
Follower 3
E F
Replication of data from
leader to follower
Redirection of the
data
15. Replicated Setup
Redis
Leader
Client
Applications
Redis Follower
Redis Follower
Redis follower is replicating the
data that is being written on the
redis leader server
Client application will write the
data on the leader server of
Redis
All read requests will be redirected to the
followers node to reduce the network noise
from leader node of Redis.
16. Replicated Setup with Sentinel
Redis
Leader
Redis Follower
Redis Follower
Redis follower is replicating the
data that is being written on the
redis leader server
Redis
Sentinel
Redis sentinel keeping watch on
replicated cluster, if leader will fail, it will
promote the follower to the leader
System
Failure
Redis
Leader
Redis Follower
17. Challenges of Replicated Setup
Redis
Leader
Redis
Follower
Redis
Follower
● Dataset can become large
for leader and follower node
which can crash Redis
process.
● A single master can become
a bottleneck for the data
18. Sharded Cluster Setup
Leader 1 Leader 2 Leader 3
Follower 1 Follower 2 Folower 3
Leader is sharding data
between the leader
nodes
Followers replicating
data from leader nodes
Redirection for data
search and write
Write requests can be
sent on leader nodes
Read requests can be
sent on follower nodes
Client Application
Client Application
23. Scaling Sharded Setup
Redis Leader 1
A B
Redis Leader 2
C D
Redis Leader 3
F G
Redis Follower 1
A B
Redis Follower 2 Redis Follower 3
E H
C D E F G H
Redis Leader 4
Redis Follower 4
H
E
H
E
Resharding
24. Challenges in Scaling Redis
Sentinel configuration
and scaling
Resharding of data in
cluster mode
Complexity in scaling
Redis
28. Redis Setup on Kubernetes
Standalone
Redis Pod
Leader
Follower Follower
Leader
Follower
Leader Leader
Follower Follower
29. Challenges of Redis On Kubernetes
Dynamic IP update of
redis pod
Scaling Redis cluster on-
fly
Monitoring of Redis
system
Production ready
configuration
Security in terms of
Kubernetes and Redis
Managing persistent
data
30. Solution of Redis on Kubernetes
OT Redis Operator
Host, Run and Scale Redis cluster on
Kubernetes.
31. Features of Redis Operator
Multiple Redis version
supported
Standalone and Cluster
mode supported
Automated failover and
recovery is supported
In built monitoring
support with exporter
Password and
password-less support
TLS support for security
ipv4 ipv6
Ipv4 and Ipv6 support
for Redis
Detailed monitoring
dashboard of Grafana
On-fly upgrade without
downtime
