Tested on OCP 4.9 and below Loki csv.

[kbharti@cube hack]$ oc get csv -n openshift-logging

NAME                   DISPLAY         VERSION   REPLACES   PHASE

loki-operator.v0.0.1   Loki Operator   0.0.1                Succeeded

Steps to Deploy Loki Operator:

1) Build and push the container image [2] and then deploy the operator with: 

make olm-deploy REGISTRY_ORG=$YOUR_QUAY_ORG VERSION=$VERSION

2) create a storage secret for the operator

./hack/deploy-example-secret.sh openshift-logging

3)  create a LokiStack instance to get the various components of Loki up and running

oc create -f lokistack_gateway_ocp.yaml -n openshift-logging

Documentation: https://github.com/grafana/loki/blob/main/operator/docs/hack_loki_operator.md#hacking-on-loki-operator-on-openshift

Result:

[kbharti@cube hack]$ oc get pods -n openshift-logging

NAME                                                              READY   STATUS             RESTARTS        AGE

ca62d525248e797cf94ed1f067021020d655a54cf961251d1ec098--1-stzct   0/1     Completed          0               10m

loki-compactor-lokistack-dev-0                                    0/1     CrashLoopBackOff   5 (2m17s ago)   5m28s

loki-distributor-lokistack-dev-764f88d94b-6hfnj                   0/1     CrashLoopBackOff   5 (2m21s ago)   5m28s

loki-index-gateway-lokistack-dev-0                                0/1     CrashLoopBackOff   5 (2m12s ago)   5m28s

loki-ingester-lokistack-dev-0                                     0/1     CrashLoopBackOff   5 (2m16s ago)   5m28s

loki-operator-controller-manager-79bb668fcf-xsd2m                 2/2     Running            0               9m57s

loki-querier-lokistack-dev-6989b6964c-26vjf                       0/1     CrashLoopBackOff   5 (2m27s ago)   5m28s

loki-query-frontend-lokistack-dev-5744d7f997-b27cs                0/1     CrashLoopBackOff   5 (2m18s ago)   5m28s

lokistack-gateway-lokistack-dev-7f69ccd568-rs5bh                  2/2     Running            0               5m27s

quay-io-rhn-support-kbharti-loki-operator-bundle-v0-0-1           1/1     Running            0               10m

Error in LokiStack Pods: level=error ts=2022-01-10T16:54:10.516711991Z caller=main.go:51 msg="validating config" err="invalid queryrange config: querier.cache-results may only be enabled in conjunction with querier.split-queries-by-interval. Please set the latter"