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This guide covers OpenShift cluster configuration for collecting and storing logs in Victoria Logs.

## Pre-Requirements

* [OpenShift cluster](https://www.redhat.com/en/technologies/cloud-computing/openshift)
* Admin access to OpenShift cluster
* [kubectl installed](https://kubernetes.io/docs/tasks/tools/install-kubectl) and configured to access OpenShift cluster
* [Helm installed](https://helm.sh/docs/intro/install)

## Install Red Hat OpenShift Logging operator 

[Cluster logging operator](https://github.com/openshift/cluster-logging-operator) is a logging solution to support aggregated cluster logging. It is using [Vector](https://vector.dev/) for logs collection and shipping to remote storage.

In order to install the operator, navigate to the OpenShift web console and select the `Operators` tab. Then, click on `OperatorHub` and search for `Red Hat OpenShift Logging`. Click on the `Red Hat OpenShift Logging` operator and then click on `Install`.

![Install logging operator](install-oc-logging-operator.webp)


## RBAC configuration

Create a service account and cluster role binding for the service account to access the logs. 
OpenShift provides separate `ClusterRoles` for monitoring of different types of logs: `audit`, `infrastructure` and `application`. 

The following configuration will allow the service account to collect all types of logs:
```yaml
kind: ServiceAccount
apiVersion: v1
metadata:
  name: victorialogs
  namespace: openshift-logging
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: vl-collect-infra
subjects:
  - kind: ServiceAccount
    name: victorialogs
    namespace: openshift-logging
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: collect-infrastructure-logs
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: vl-collect-audit
subjects:
  - kind: ServiceAccount
    name: victorialogs
    namespace: openshift-logging
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: collect-audit-logs
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: vl-collect-application
subjects:
  - kind: ServiceAccount
    name: victorialogs
    namespace: openshift-logging
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: collect-application-logs
```

Alternatively, you can use OpenShift console to create the service account and cluster role binding. 
Navigate to `ServiceAccounts` and click on `Create Service Account`. Fill in the name `victorialogs` and namespace `openshift-logging` and click on `Create`. 
Then, navigate to `RoleBindings` and create a binding for each `ClusterRole` for subject `victorialogs` in `openshift-logging` namespace.


## Install Victoria Logs

Add Victoria Metrics Helm [repository](https://github.com/VictoriaMetrics/helm-charts):
```bash
helm repo add vm https://victoriametrics.github.io/helm-charts/
```

Minimal configuration for VictoriaLogs running in OpenShift:
```yaml
securityContext:
  enabled: true
  allowPrivilegeEscalation: false
  capabilities:
    drop:
      - ALL
  readOnlyRootFilesystem: true

podSecurityContext:
  enabled: true
  runAsNonRoot: true
```
Save the configuration to `vl.yaml`.

> Note, that depending on the OpenShift cluster configuration, additional security settings might be required.

Create namespace for VictoriaLogs:
```bash
kubectl create namespace vl
```

Install VictoriaLogs with the following command:
```bash
helm upgrade --namespace vl --install vl vm/victoria-logs-single -f vl.yaml
```

## Configure logs forwarding

Cluster logging operator uses `ClusterLogForwarder` resource for logs forwarding configuration.

Here is an example configuration to forward all cluster logs to VictoriaLogs:
```yaml
apiVersion: observability.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: logging
  namespace: openshift-logging
spec:
  managementState: Managed
  outputs:
    - elasticsearch:
        index: logs
        url: "http://vl-victoria-logs-single-server.vl.svc.cluster.local:9428/insert/elasticsearch/_bulk?_stream_fields=log_type,hostname,stream,kubernetes.pod_name,kubernetes.container_name,kubernetes.pod_namespace&_time_field=@timestamp&_msg_field=message,msg,_msg,log.msg,log.message,log&fake_field=1"
        version: 8
        tuning:
          compression: gzip
      name: victorialogs
      type: elasticsearch
    - elasticsearch:
        index: logs
        url: "http://vl-victoria-logs-single-server.vl.svc.cluster.local:9428/insert/elasticsearch/_bulk?_stream_fields=log_type,hostname,annotations.authorization.k8s.io/decision,hostname,verb&_time_field=@timestamp&_msg_field=annotations.authorization.k8s.io/reason&fake_field=1"
        version: 8
        tuning:
          compression: gzip
      name: victorialogs-audit
      type: elasticsearch
    - elasticsearch:
        index: logs
        url: "http://vl-victoria-logs-single-server.vl.svc.cluster.local:9428/insert/elasticsearch/_bulk?_stream_fields=log_type,hostname,tag,systemd.t.EXE,level&_time_field=@timestamp&_msg_field=message,msg,_msg,log.msg,log.message,log&fake_field=1"
        version: 8
        tuning:
          compression: gzip
      name: victorialogs-infrastructure
      type: elasticsearch
  pipelines:
    - inputRefs:
        - application
      name: application
      outputRefs:
        - victorialogs-audit
    - inputRefs:
        - infrastructure
      name: infrastructure
      outputRefs:
        - victorialogs-infrastructure
    - inputRefs:
        - audit
      name: audit
      outputRefs:
        - victorialogs
  serviceAccount:
    name: victorialogs
```

It is also possible to configure logs forwarding using OpenShift console. Navigate to `Operators` tab and click on `Installed Operators`. Then, click on `Red Hat OpenShift Logging` and navigate to `ClusterLogForwarders`. Click on `Create ClusterLogForwarder`. 
Configure the forwarding to VictoriaLogs using the provided form and click on `Create`.
![Create logs forwarders menu](create-cluster-logs-forwarder.webp)
![Create forwarder config](create-cluster-logs-forwarder-2.webp)

## Verify logs collection

To verify that logs are collected and stored in VictoriaLogs, navigate to the VictoriaLogs web interface.

![VictoriaLogs](openshift-logs.webp)

Logs will be available in the interface and can be queried using [LogsQL](https://docs.victoriametrics.com/victorialogs/logsql/).
Note that logs will have `log_type` attached to them to distinguish between different types of logs.