Support Master/Slave connections using Lettuce [DATAREDIS-580]

[spring-projects-issues]

Mark Paluch opened DATAREDIS-580 and commented

Lettuce provides a Master/Slave API that allows slave reads. Master/Slave is either configured with a static node set (well-suited for AWS ElastiCache use) or Redis Sentinel.

Master/Slave allows configuration of its read-behavior (i.e. slave reads).

connection.setReadFrom(ReadFrom.MASTER_PREFERRED);

LettuceConnectionFactory could be configured to use StatefulRedisMasterSlaveConnection and apply read preferences

---

Issue Links:

• DATAREDIS-724 Support for Slave reads for lettuce
  ("is duplicated by")

• DATAREDIS-752 Integration of Lettuce with Spring data redis and master slave strategy

• DATAREDIS-762 Add support for static Master/Slave setups with provided nodes

• DATAREDIS-319 Configure redis in connection factory as read only or read&write and test it
  ("supersedes")

Referenced from: pull request #287

2 votes, 5 watchers

[spring-projects-issues]

Salil Gandhi commented

Hello,

Is there a timeline for this feature to be out? We need it as quickly as possible ...
In the meantime, I would like to pull this branch and test it out. Can you provide me access?

Thanks,
Salil Gandhi

[spring-projects-issues]

Mark Paluch commented

Feel free to use the branch build:

<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-redis</artifactId>
  <version>2.1.0.DATAREDIS-580-SNAPSHOT</version>
</dependency>
 
<repositories>
  <repository>
    <id>spring-libs-snapshot</id>
    <snapshots><enabled>true</enabled></snapshots>
    <name>Springframework Maven SNAPSHOT Repository</name>
    <url>http://repo.spring.io/libs-snapshot</url>
  </repository> 
</repositories> 

Expect a GA release somewhere around next year

[spring-projects-issues]

Salil Gandhi commented

Thank you Mark!

I will try to use this branch.

Thanks,
Salil Gandhi

[spring-projects-issues]

Salil Gandhi commented

Hi Mark,

I am getting error while trying to download from the snapshot repository. Error is - Connection refused. Is there any special permissions required to do so?

Thanks,
Salil

[spring-projects-issues]

Mark Paluch commented

Our repository server is publicly available. Accessing via Maven/Web browser works for me. Proxies/firewalls in front of you might change how your experience access to repo.spring.io

[spring-projects-issues]

Salil Gandhi commented

Hi Mark,

We are getting error: Could not find artifact org.springframework.data:spring-data-redis:jar:2.1.0.DATAREDIS-580-SNAPSHOT
When I checked the repository I do not see the 580 version in the snapshot list.

http://repo.spring.io/libs-snapshot/org/springframework/data/spring-data-redis/

Thanks,
Salil

[spring-projects-issues]

Mark Paluch commented

Sorry for the inconvenience, the build failed that's why the artifact wasn't deployed beforehand. I fixed it,https://repo.spring.io/libs-snapshot/org/springframework/data/spring-data-redis/2.1.0.DATAREDIS-580-SNAPSHOT/ is now in place

[spring-projects-issues]

Salil Gandhi commented

Thanks Mark! This worked..

[spring-projects-issues]

Haitao Liu commented

Hi Mark,

I have elasicache 1 master and 2 slaves setup. I am still not sure how to pass in a list of master slave RedisURIs to construct a StatefulRedisMasterSlaveConnection for LettuceConnectionFactory. I only see support for standaloneConfiguration with single host and port.
LettuceClientConfiguration configuration = LettuceTestClientConfiguration.builder().readFrom(ReadFrom.SLAVE)
.build();
LettuceConnectionFactory factory = new LettuceConnectionFactory(SettingsUtils.standaloneConfiguration(),
configuration);

Thanks,
Haitao

[spring-projects-issues]

Mark Paluch commented

Haitao Liu – Care to post your question on StackOverflow to make it available to a broader community?

[spring-projects-issues]

Haitao Liu commented

Thanks Mark for your reply.
I posted the question on StackOverflow.
https://stackoverflow.com/questions/48470649/configuring-spring-data-redis-with-lettuce-for-elasticache-master-slave