Automating Redis Cluster Creation

[Navneet Singh]

Hi,

I have created a terraform config which creates AWS instances and installs redis on it & then configures a new redis cluster on these instances.

I have used null_resource which gets triggered when all the redis nodes are up & ready.

But when the command "sudo redis-cli --cluster create" gets triggered, it asks for an input, but I am unable to do so. Is there a way using which I can give an input to the terraform while its getting executed.

Any help is appreciated. Thanks in Advance. 

[Ryan Hartkopf]

Hi Navneet,

I'm not aware of a method to pass input to stdin. However I'm sure there is a way to make that command work without requiring input. Check out this create-cluster script from Redis: http://download.redis.io/redis-stable/utils/create-cluster/create-cluster

It is using the command `redis-cli --cluster create $HOSTS --cluster-replicas $REPLICAS` to create the cluster. Adding those options with the correct values may allow the command to run unattended.

[Navneet Singh]

Hi Ryan,

I am using a similar command but this command seeks an input as a ‘yes’, to proceed with the cluster creation.

I missed updating the thread, that I was able to solve the issue by changing the command to.

echo yes | redis-cli --cluster create $HOSTS --cluster-replicas $REPLICAS

Regards,

Nav

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