Redis limitations

[John Parfitt]

Hi all,

I'm trying to terraform Elasticache/Redis and am running into some snags. Here is my config:

resource "aws_elasticache_replication_group" "vnu-prod-global" {
    replication_group_id = "vnu-prod-global"
    replication_group_description = "vnu-prod-global"
    engine = "redis"
    port = 6379
    number_cache_clusters = 2
    node_type = "cache.r3.large"
    parameter_group_name = "default.redis2.8"
    subnet_group_name = "cache"
}

The "parameter_group_name" seems to only accept default.redis3.2

When i try to launch 2.8, here is the error I get:

Error applying plan:

1 error(s) occurred:

* aws_elasticache_replication_group.vnu-prod-global: Error creating Elasticache Replication Group: InvalidParameterCombination: Expected a parameter group of family redis3.2 but found one of family redis2.8

status code: 400, request id: b641791c-be64-11e6-a5d5-4b14bb8e852a

Also - when will the option to enable Multi AZ be available?

Thank you

[David Adams]

You can specify ' engine_version = "2.8.23" ' although it looks like that's not documented. To get a list of versions available:

    aws elasticache describe-cache-engine-versions

I assume the list is available in the console as well.

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[John Parfitt]

I've tried that too. Same result.

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[David Adams]

I dunno, it's hard to say from what you've provided. It works for me with:

    engine = "redis"

    engine_version = "2.8.23"

    parameter_group_name = "default.redis2.8"

I also set automatic_failover_enabled, security_group_ids, and availability_zones in addition to the fields you list in your example.

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[John Parfitt]

Actually nvm, you are correct.

"engine_version" must be specified in order for the paramter_group_name to work with 2.8, else it excepts the most recent version.

Thank you!

[John Parfitt]

Yes i have all of those set as well, except for automatic_failover_enabled, which i should do. Thanks again.

[John Parfitt]

One more thing. Is there a way to enable "Multi AZ" for Redis? I was hoping automatic_failover_enabled would do it, since, in the GUI, there is a checkbox for "Multi-AZ with Auto-Failover". But it's still showing as disabled.

I see an "az_mode" for aws_elasticache_cluster, but nothing for replication_group.

On Monday, December 12, 2016 at 9:48:37 AM UTC-8, David Adams wrote: