Settings in ecs.j2 template - roles/config/cluster/ecs/templates/configs/ecs.j2

[hadoopch]

Hi,

i checked the ecs.j2 template today.

There is an unknown parameter set for Docker:

• docker_images_destination_registry_user (i can't find it in CM)

Furthermore longhorn_replication ist set to 1.

In my opinion best practise would be to skip this parameter or set it to 2.
If you skip it then

• target_redundancy

will define the number of longhorn replica.
target_redundancy has a default value of 2.

Regards

Uli

[wmudge]

Hi Uli! I spent a bit of time looking into these points. I agree with you on the longhorn_replication; we should set it to 2. As to the docker_images_destination_registry_user, I'm still reviewing and will get back to you.

[clevesque]

"longhorn_replication" maps directly to LH global settings, the param "target_redundancy" was added to facilitate single node CDSW to CML migration.
So in 99% of the case, just supply a value for longhorn_replication (almost always = 2).

So yes I would say that ecs.j2 could be improved by defaulting to 2 (and not 1).