Red Hat Summit第15章 Changing resources for the OpenShift Data Foundation components
When you install OpenShift Data Foundation, it comes with pre-defined resources that the OpenShift Data Foundation pods can consume. In some situations with higher I/O load, it might be required to increase these limits.
- To change the CPU and memory resources on the rook-ceph pods, see 「Changing the CPU and memory resources on the rook-ceph pods」.
- To tune the resources for the Multicloud Object Gateway (MCG), see 「Tuning the resources for the MCG」.
15.1. Changing the CPU and memory resources on the rook-ceph pods
When you install OpenShift Data Foundation, it comes with pre-defined CPU and memory resources for the rook-ceph pods. You can manually increase these values according to the requirements.
You can change the CPU and memory resources on the following pods:
-
mgr -
mds -
rgw
The following example illustrates how to change the CPU and memory resources on the rook-ceph pods. In this example, the existing MDS pod values of cpu and memory are increased from 1 and 4Gi to 2 and 8Gi respectively.
Edit the storage cluster:
# oc edit storagecluster -n openshift-storage <storagecluster_name><storagecluster_name>Specify the name of the storage cluster.
For example:
# oc edit storagecluster -n openshift-storage ocs-storagecluster
Add the following lines to the storage cluster Custom Resource (CR):
spec: resources: mds: limits: cpu: 2 memory: 8Gi requests: cpu: 2 memory: 8Gi- Save the changes and exit the editor.
Alternatively, run the
oc patchcommand to change the CPU and memory value of themdspod:# oc patch -n openshift-storage storagecluster <storagecluster_name> --type merge \ --patch '{"spec": {"resources": {"mds": {"limits": {"cpu": "2","memory": "8Gi"},"requests": {"cpu": "2","memory": "8Gi"}}}}}'<storagecluster_name>Specify the name of the storage cluster.
For example:
# oc patch -n openshift-storage storagecluster ocs-storagecluster \ --type merge \ --patch '{"spec": {"resources": {"mds": {"limits": {"cpu": "2","memory": "8Gi"},"requests": {"cpu": "2","memory": "8Gi"}}}}}'
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