There are several components in cluster logging, each one implemented with one or more images. Each image is specified by an environment variable defined in the cluster-logging-operator deployment in the openshift-logging project and should not be changed.
You can view the images by running the following command:
$ oc -n openshift-logging set env deployment/cluster-logging-operator --list | grep _IMAGE
ELASTICSEARCH_IMAGE=registry.redhat.io/openshift4/ose-logging-elasticsearch5:v4.3 (1) FLUENTD_IMAGE=registry.redhat.io/openshift4/ose-logging-fluentd:v4.3 (2) KIBANA_IMAGE=registry.redhat.io/openshift4/ose-logging-kibana5:v4.3 (3) CURATOR_IMAGE=registry.redhat.io/openshift4/ose-logging-curator5:v4.3 (4) OAUTH_PROXY_IMAGE=registry.redhat.io/openshift4/ose-oauth-proxy:v4.3 (5)
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ELASTICSEARCH_IMAGE deploys Elasticsearch.
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FLUENTD_IMAGE deploys Fluentd.
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KIBANA_IMAGE deploys Kibana.
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CURATOR_IMAGE deploys Curator.
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OAUTH_PROXY_IMAGE defines OAUTH for {product-title}.
The values might be different depending on your environment.