Document URL: https://docs.openshift.com/container-platform/3.11/install_config/aggregate_logging.html#aggregated-fluentd

Section Number and Name: Throttling logs in Fluentd

Describe the issue:

The "oc patch" instructions add another nodeSelector label "nonexistlabel=true" instead of overwriting existing nodeSelector label "logging-infra-fluentd=true".

Use the oc patch command to modify the daemonset nodeSelector:

$ oc patch ds logging-fluentd -p '{"spec":{"template":{"spec":{"nodeSelector":{"nonexistlabel":"true"}}}}}'


Suggestions for improvement: 

Use the oc patch command to modify the daemonset nodeSelector:

$ oc patch --type=merge ds logging-fluentd -p '{"spec":{"template":{"spec":{"nodeSelector":{"nonexistlabel":"true"}}}}}'


--type=merge should replace existing nodeSelector label with new one??


Additional information: 

DaemonSet fails to redeploy to nodes (due to "nonexistlabel" label in nodeSelector not matching any nodes) at the last instruction:

Use the oc patch command to modify the daemonset nodeSelector:

oc patch ds logging-fluentd -p '{"spec":{"template":{"spec":{"nodeSelector":{"logging-infra-fluentd":"true"}}}}}'