# RealTheory

> Knowledge base documentation for RealTheory.

## v1

- [Validating that Cluster Costs are Justified](https://resources.realtheory.io/docs/validating-that-cluster-costs-are-justified.md)
- [Identifying Wasted Cost](https://resources.realtheory.io/docs/identifying-wasted-cost.md)
- [Understanding Node Pools](https://resources.realtheory.io/docs/understanding-node-pools.md)
- [Implementing a Node Pool Recommendation](https://resources.realtheory.io/docs/implementing-a-node-pool-recommendation.md)
- [What Does the Out-of-Date Agent Indicator Mean?](https://resources.realtheory.io/docs/what-does-the-out-of-date-agent-indicator-mean.md)
- [How to Deploy the RealTheory Agent Using the Bulk Deployment Tool](https://resources.realtheory.io/docs/how-to-deploy-the-realtheory-agent-using-the-bulk-deployment-tool.md)
- [How To Leverage RealTheory Labels For Scalability and Automation](https://resources.realtheory.io/docs/how-to-leverage-realtheory-labels-for-scalability-and-automation.md)
- [How To Use Label Selectors to Identify Resources](https://resources.realtheory.io/docs/how-to-use-label-selectors-to-identify-resources.md)
- [What Data Does RealTheory Capture From the Kubernetes Environment?](https://resources.realtheory.io/docs/what-data-does-realtheory-capture-from-the-kubernetes-environment.md)
- [Why Does the RealTheory Collector Restart?](https://resources.realtheory.io/docs/why-does-the-realtheory-collector-restart.md)
- [How to Specify SKU Names For AWS SKU Rate Cards](https://resources.realtheory.io/docs/how-to-specify-sku-names-for-aws-sku-rate-cards.md)
- [How to Specify SKU Names For Azure SKU Rate Cards](https://resources.realtheory.io/docs/how-to-specify-sku-names-for-azure-sku-rate-cards.md)
- [How to Specify SKU Names For GCP SKU Rate Cards](https://resources.realtheory.io/docs/how-to-specify-sku-names-for-gcp-sku-rate-cards.md)
- [Why is Cost Data Not Available for an Object?](https://resources.realtheory.io/docs/why-is-cost-data-not-available-for-an-object.md)
- [Why Should the RealTheory Agent Run with Only One Replica?](https://resources.realtheory.io/docs/why-should-the-realtheory-agent-run-with-only-one-replica.md)
- [Making Cost Information Available in RealTheory](https://resources.realtheory.io/docs/making-cost-information-available-in-realtheory.md)
- [Configuring Jira for RealTheory Ticketing Integration](https://resources.realtheory.io/docs/configuring-jira-for-realtheory-ticketing-integration.md)
- [How To Change the Port Used by the RealTheory Collector Agent](https://resources.realtheory.io/docs/how-to-change-the-port-used-by-the-realtheory-collector-agent.md)
- [Limited Support for Safari in RealTheory: What You Need to Know](https://resources.realtheory.io/docs/limited-support-for-safari-in-realtheory-what-you-need-to-know.md)
- [Why Are My Collector Agents Out of Date and Not Upgrading?](https://resources.realtheory.io/docs/why-are-my-collector-agents-out-of-date-and-not-upgrading.md)
- [Why Is Cluster Metadata Missing From the Console?](https://resources.realtheory.io/docs/why-is-cluster-data-missing-from-the-console.md)
- [Validate Project Key Check Failure when Integrating with a Third-Party Ticketing System](https://resources.realtheory.io/docs/validate-project-key-check-failure-when-integrating-with-a-third-party-ticketing-system.md)
- [How To Troubleshoot Installation Issues](https://resources.realtheory.io/docs/how-to-troubleshoot-installation-issues.md)
- [How To Verify the Cluster is Running a Supported Version of Kubernetes](https://resources.realtheory.io/docs/how-to-verify-the-cluster-is-running-a-supported-version-of-kubernetes.md)
- [How To Verify the Metrics Server is Installed in the Cluster](https://resources.realtheory.io/docs/how-to-verify-the-metrics-server-is-installed-in-the-cluster.md)
- [How To Verify You Have the Appropriate RBAC Permissions To Install the RealTheory Collector](https://resources.realtheory.io/docs/how-to-verify-you-have-the-appropriate-rbac-permissions-to-install-the-realtheory-collector.md)
- [How To Verify You Have Configured the Proxy Settings Correctly](https://resources.realtheory.io/docs/how-to-verify-you-have-configured-the-proxy-settings-correctly.md)
- [Understanding Recommendation Confidence in RealTheory](https://resources.realtheory.io/docs/understanding-recommendation-confidence-in-realtheory.md)
- [Redirected to RealTheory Console When Using SSO with Google Identity Platform (IDP)](https://resources.realtheory.io/docs/redirected-to-realtheory-console-when-using-sso-with-google-identity-platform-idp.md)
- [How To Generate RealTheory API Keys](https://resources.realtheory.io/docs/how-to-generate-realtheory-api-keys.md)
- [How To Grant RealTheory RBAC Permissions to Custom Resources and Custom Resource Definitions](https://resources.realtheory.io/docs/how-to-grant-realtheory-rbac-permissions-to-custom-resources-and-custom-resource-definitions.md)
- [How To Set the Appropriate Requests for the RealTheory Collector](https://resources.realtheory.io/docs/how-to-set-the-appropriate-requests-for-the-realtheory-collector.md)
- [How To Find the Recommendations for a Given Cluster and Namespace](https://resources.realtheory.io/docs/how-to-find-the-recommendations-for-a-given-cluster-and-namespace.md)
- [How To Find the Alerts for a Given Cluster and Namespace](https://resources.realtheory.io/docs/how-to-find-the-alerts-for-a-given-cluster-and-namespace.md)
- [How To Resolve RealTheory Authorization Errors for the networking.istio.io API Group](https://resources.realtheory.io/docs/how-to-resolve-realtheory-authorization-errors-for-the-networkingistioio-api-group.md)
- [How To Resolve RealTheory Authorization Errors for an API Group](https://resources.realtheory.io/docs/how-to-resolve-realtheory-authorization-errors-for-an-api-group.md)
- [How To Register a Container Registry](https://resources.realtheory.io/docs/how-to-register-a-container-registry.md)
- [How To Resolve the 'cannot get the kubernetes node metrics from the K8s master' Error](https://resources.realtheory.io/docs/how-to-resolve-the-cannot-get-the-kubernetes-node-metrics-from-the-k8s-master-error.md)
- [How To Resolve the 'invalid memory address or nil pointer dereference' Runtime Error](https://resources.realtheory.io/docs/how-to-resolve-the-invalid-memory-address-or-nil-pointer-dereference-runtime-error.md)
- [How To Verify Discretionary Access Control Gives You Access to the Appropriate Cluster(s)](https://resources.realtheory.io/docs/how-to-verify-discretionary-access-control-gives-you-access-to-the-appropriate-clusters.md)
- [How To Address Container Liveness Probe Issues](https://resources.realtheory.io/docs/how-to-address-container-liveness-probe-issues.md)
- [How To Address Container Startup Probe Issues](https://resources.realtheory.io/docs/how-to-address-container-startup-probe-issues.md)
- [How To Address Container Readiness Probe Issues](https://resources.realtheory.io/docs/how-to-address-container-readiness-probe-issues.md)
- [How To Minimize Container Vulnerabilities](https://resources.realtheory.io/docs/how-to-minimize-container-vulnerabilities.md)
- [How To Install or Upgrade the Metrics Server](https://resources.realtheory.io/docs/how-to-install-or-upgrade-the-metrics-server.md)
- [How To Install or Upgrade OPA Gatekeeper](https://resources.realtheory.io/docs/how-to-install-or-upgrade-opa-gatekeeper.md)
- [How To Install or Upgrade NGINX Ingress Controller](https://resources.realtheory.io/docs/how-to-install-or-upgrade-nginx-ingress-controller.md)
- [How To Install or Upgrade Prometheus](https://resources.realtheory.io/docs/how-to-install-or-upgrade-prometheus.md)
- [How To Install or Upgrade KEDA](https://resources.realtheory.io/docs/how-to-install-or-upgrade-keda.md)
- [How To Install or Upgrade Cert Manager](https://resources.realtheory.io/docs/how-to-install-or-upgrade-cert-manager.md)
- [How To Install or Upgrade Kube State Metrics](https://resources.realtheory.io/docs/how-to-install-or-upgrade-kube-state-metrics.md)
- [Kubernetes Objects Temporarily Disappear from the RealTheory Console](https://resources.realtheory.io/docs/kubernetes-objects-temporarily-disappear-from-the-realtheory-console.md)
- [RealTheory Collector Logs Contain Unable to get the storage classes Error](https://resources.realtheory.io/docs/realtheory-collector-logs-contain-unable-to-get-the-storage-classes-error.md)
- [How To Resolve OOMKilled Kubernetes Errors (Exit Code 137)](https://resources.realtheory.io/docs/how-to-resolve-oomkilled-kubernetes-errors-exit-code-137.md)
- [How To Resolve The Kubernetes CrashLoopBackOff Pod State](https://resources.realtheory.io/docs/how-to-resolve-the-kubernetes-crashloopbackoff-pod-state.md)
- [How To Resolve ImagePullBackOff Errors](https://resources.realtheory.io/docs/how-to-resolve-imagepullbackoff-errors.md)
- [How To Resolve A CreateContainerConfigError](https://resources.realtheory.io/docs/how-to-resolve-a-createcontainerconfigerror.md)
- [How To Resolve ErrImagePull Errors](https://resources.realtheory.io/docs/how-to-resolve-errimagepull-errors.md)
- [How To Uninstall the RealTheory Collector](https://resources.realtheory.io/docs/how-to-uninstall-the-realtheory-collector.md)
- [Collector Network Connectivity Requirements](https://resources.realtheory.io/docs/collector-network-connectivity-requirements.md)
- [Release Notes](https://resources.realtheory.io/docs/release-notes.md)
- [Creating Your RealTheory Account](https://resources.realtheory.io/docs/creating-your-realtheory-account.md)
- [Installing RealTheory in a Cluster](https://resources.realtheory.io/docs/installing-realtheory-in-a-cluster.md)
- [RealTheory Collector Minimum Requirements](https://resources.realtheory.io/docs/realtheory-collector-minimum-requirements.md)
- [Manually Adding Users to Your RealTheory Account](https://resources.realtheory.io/docs/manually-add-users-to-your-realtheory-account.md)
- [Setting Up Single Sign On (SSO)](https://resources.realtheory.io/docs/how-to-set-up-single-sign-on-sso.md)
- [Logging in Using Single Sign-On (SSO)](https://resources.realtheory.io/docs/logging-in-using-single-sign-on-sso.md)
- [Rate Cards Explained](https://resources.realtheory.io/docs/rate-cards-explained.md)
- [Setting the Default Rate Card](https://resources.realtheory.io/docs/setting-the-default-rate-card.md)
- [Creating a SKU Rate Card](https://resources.realtheory.io/docs/creating-a-sku-rate-card.md)
- [Creating a Discount Rate Card](https://resources.realtheory.io/docs/creating-a-discount-rate-card.md)
- [Creating a Custom Rate Card](https://resources.realtheory.io/docs/creating-a-custom-rate-card.md)
- [Rate Card Policies Explained](https://resources.realtheory.io/docs/rate-card-policies-explained.md)
- [Creating Rate Card Policies](https://resources.realtheory.io/docs/creating-rate-card-policies.md)
- [Making Cost Information Available for Environments That Are Not Currently Integrated with RealTheory](https://resources.realtheory.io/docs/how-to-make-cost-information-available-for-environments-that-are-not-currently-integrated-with-realtheory.md)
- [Access Control Policies Explained](https://resources.realtheory.io/docs/access-control-policies-explained.md)
- [Creating Access Control Policies](https://resources.realtheory.io/docs/creating-access-control-policies.md)
- [Configuring the Default Access Control Policy](https://resources.realtheory.io/docs/configuring-the-default-access-control-policy.md)
- [Optimization Profiles Explained](https://resources.realtheory.io/docs/optimization-profiles-explained.md)
- [Setting the Default Optimization Profile](https://resources.realtheory.io/docs/setting-the-default-optimization-profile.md)
- [Creating an Optimization Profile](https://resources.realtheory.io/docs/creating-an-optimization-profile.md)
- [Optimization Policies Explained](https://resources.realtheory.io/docs/optimization-policies-explained.md)
- [Creating an Optimization Policy](https://resources.realtheory.io/docs/creating-an-optimization-policy.md)
- [Integration Profiles Explained](https://resources.realtheory.io/docs/integration-profiles-explained.md)
- [Creating an Integration Profile](https://resources.realtheory.io/docs/creating-an-integration-profile.md)
- [Overview](https://resources.realtheory.io/docs/overview.md)
- [API Reference](https://resources.realtheory.io/docs/api-reference.md)
- [Authentication](https://resources.realtheory.io/docs/authentication.md)
- [Authentication Walkthrough](https://resources.realtheory.io/docs/authentication-walkthrough.md)
- [Metadata](https://resources.realtheory.io/docs/metadata.md)
- [Queries](https://resources.realtheory.io/docs/queries.md)
- [How To: List the System Alerts for a Kubernetes Cluster](https://resources.realtheory.io/docs/how-to-list-the-system-alerts-for-a-kubernetes-cluster.md)
- [How To: List the Managed Kubernetes Clusters](https://resources.realtheory.io/docs/how-to-list-the-managed-kubernetes-clusters.md)
- [How To: List the Namespaces for a Kubernetes Cluster](https://resources.realtheory.io/docs/how-to-list-the-namespaces-for-a-kubernetes-cluster.md)
- [How To: List the Deployments for a Kubernetes Cluster](https://resources.realtheory.io/docs/how-to-list-the-deployments-for-a-kubernetes-cluster.md)
- [How To: Get the Total Cost Report for Managed Clusters](https://resources.realtheory.io/docs/how-to-get-the-total-cost-report-for-managed-clusters.md)
- [How To: Get the Lost Dollars Report for Namespaces](https://resources.realtheory.io/docs/how-to-get-the-lost-dollars-report-for-namespaces.md)
- [How To: Get the Daily Cost Report for Deployments](https://resources.realtheory.io/docs/how-to-get-the-daily-cost-report-for-deployments.md)
- [How To: Get the Daily Cost Report for StatefulSets](https://resources.realtheory.io/docs/how-to-get-the-daily-cost-report-for-statefulsets.md)
- [How To: Generate the Collector Deployment Manifest](https://resources.realtheory.io/docs/how-to-generate-the-collector-deployment-manifest.md)
- [How To: Estimate the Cost of a Kubernetes Cluster Before Provisioning](https://resources.realtheory.io/docs/how-to-estimate-the-cost-of-a-kubernetes-cluster-before-provisioning.md)
- [K8sSummary: ClusterSummary](https://resources.realtheory.io/docs/k8ssummary-clustersummary.md)
- [K8sSummary: NodeSummary](https://resources.realtheory.io/docs/k8ssummary-nodesummary.md)
- [K8sSummary: NamespaceSummary](https://resources.realtheory.io/docs/k8ssummary-namespacesummary.md)
- [K8sReports: TotalCost: ClusterItem](https://resources.realtheory.io/docs/k8sreportstotalcostclusteritem.md)
- [K8sReports: LostDollars: ClusterItem](https://resources.realtheory.io/docs/k8sreportslostdollarsclusteritem.md)
- [K8sReports: LostDollars: NamespaceItem](https://resources.realtheory.io/docs/k8sreportslostdollarsnamespaceitem.md)
- [Alert: SystemAlert](https://resources.realtheory.io/docs/alert-systemalert.md)