Hi! Is it possible to place pods in different storage locations using different SCs? And keep it that way on a rack level?
Example:
rack1 - sc1
rack2 - sc2
rack3 - sc3
Thanks,
Vladimir
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Erick Ramirez for the following reason: The question is answered, right answer was accepted
Hi @mzv
You can configure the storage class but it applies to all Cassandra pods. Here is an example:
apiVersion: cassandra.datastax.com/v1beta1
kind: CassandraDatacenter
metadata:
name: dc2
spec:
clusterName: example
serverType: cassandra
serverVersion: "3.11.7"
managementApiAuth:
insecure: {}
size: 9
storageConfig:
cassandraDataVolumeClaimSpec:
storageClassName: server-storage
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 500Gi
racks:
- name: r1
nodeAffinityLabels:
topology.kubernetes.io/zone: us-east1-a
- name: r2
nodeAffinityLabels:
topology.kubernetes.io/zone: us-east1-b
- name: r3
nodeAffinityLabels:
topology.kubernetes.io/zone: us-east1-c
In general I would advise against using different settings across nodes within a single DC. You will have replicas in each rack. Let's say you used faster storage in r1 and in r2. This could lead to performance problems with replicas in r3.
If you want to use different resources for some nodes, then I would consider putting those nodes into a separate DC.
Cheers
John
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