---
title: "Reference"
description: "Reference content for Calico Open Source including APIs, calicoctl, architecture and design, host endpoints, Felix, Typha, and FAQ."
product: "Calico Open Source"
version: "3.32 (latest)"
section: "Reference"
canonical_url: "https://docs.tigera.io/calico/latest/reference/"
---

# Reference

APIs, CLI, architecture and design, and FAQ.

## API and installation references

##### [Calico Client library](https://docs.tigera.io/calico/latest/reference/api.md)

[Calico Open Source Go client library reference for working with resources such as network policies programmatically against the Calico Open Source API.](https://docs.tigera.io/calico/latest/reference/api.md)

##### [Helm installation reference](https://docs.tigera.io/calico/latest/reference/installation/helm_customization.md)

[Helm chart values reference for installing Calico Open Source covering supported overrides and operator configuration knobs.](https://docs.tigera.io/calico/latest/reference/installation/helm_customization.md)

##### [Installation reference](https://docs.tigera.io/calico/latest/reference/installation/api.md)

[Installation API reference for Calico Open Source listing the operator-managed custom resources used to configure cluster installation.](https://docs.tigera.io/calico/latest/reference/installation/api.md)

## calicoctl reference

##### [calicoctl user reference](https://docs.tigera.io/calico/latest/reference/calicoctl/overview.md)

[Reference overview of the calicoctl command-line tool for managing Calico Open Source network policy, BGP, IP address management, and node operations.](https://docs.tigera.io/calico/latest/reference/calicoctl/overview.md)

##### [calicoctl create](https://docs.tigera.io/calico/latest/reference/calicoctl/create.md)

[Reference for the calicoctl create command in Calico Open Source, used to create resources from a manifest file.](https://docs.tigera.io/calico/latest/reference/calicoctl/create.md)

##### [calicoctl replace](https://docs.tigera.io/calico/latest/reference/calicoctl/replace.md)

[Reference for the calicoctl replace command in Calico Open Source, used to replace an existing resource with one defined in a manifest.](https://docs.tigera.io/calico/latest/reference/calicoctl/replace.md)

##### [calicoctl apply](https://docs.tigera.io/calico/latest/reference/calicoctl/apply.md)

[Reference for the calicoctl apply command in Calico Open Source, used to create or update resources from a manifest file.](https://docs.tigera.io/calico/latest/reference/calicoctl/apply.md)

##### [calicoctl delete](https://docs.tigera.io/calico/latest/reference/calicoctl/delete.md)

[Reference for the calicoctl delete command in Calico Open Source, used to remove resources by name or from a manifest file.](https://docs.tigera.io/calico/latest/reference/calicoctl/delete.md)

##### [calicoctl get](https://docs.tigera.io/calico/latest/reference/calicoctl/get.md)

[Reference for the calicoctl get command in Calico Open Source, used to list resources in plain, YAML, JSON, or wide output formats.](https://docs.tigera.io/calico/latest/reference/calicoctl/get.md)

##### [calicoctl patch](https://docs.tigera.io/calico/latest/reference/calicoctl/patch.md)

[Reference for the calicoctl patch command in Calico Open Source, used to apply a partial update to a resource.](https://docs.tigera.io/calico/latest/reference/calicoctl/patch.md)

##### [calicoctl label](https://docs.tigera.io/calico/latest/reference/calicoctl/label.md)

[Reference for the calicoctl label command in Calico Open Source, used to add, change, or remove labels on workload endpoints and nodes.](https://docs.tigera.io/calico/latest/reference/calicoctl/label.md)

##### [calicoctl cluster](https://docs.tigera.io/calico/latest/reference/calicoctl/cluster/overview.md)

[Reference overview of the calicoctl cluster subcommands in Calico Open Source for cluster-wide operations such as diagnostics collection.](https://docs.tigera.io/calico/latest/reference/calicoctl/cluster/overview.md)

##### [calicoctl cluster diags](https://docs.tigera.io/calico/latest/reference/calicoctl/cluster/diags.md)

[Reference for the calicoctl cluster diags command in Calico Open Source, used to collect diagnostics from all nodes in a cluster.](https://docs.tigera.io/calico/latest/reference/calicoctl/cluster/diags.md)

##### [calicoctl ipam](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/overview.md)

[Reference overview of the calicoctl IPAM subcommands in Calico Open Source for IP address management operations.](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/overview.md)

##### [calicoctl ipam check](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/check.md)

[Reference for the calicoctl IPAM check command in Calico Open Source, used to audit IP address allocation consistency across the cluster.](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/check.md)

##### [calicoctl ipam release](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/release.md)

[Reference for the calicoctl IPAM release command in Calico Open Source, used to release a leaked or stale IP address back to the pool.](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/release.md)

##### [calicoctl ipam show](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/show.md)

[Reference for the calicoctl IPAM show command in Calico Open Source, used to display the owner and details of an allocated IP address.](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/show.md)

##### [calicoctl ipam configure](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/configure.md)

[Reference for the calicoctl IPAM configure command in Calico Open Source, used to set IP address management options such as strict affinity.](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/configure.md)

##### [calicoctl ipam split](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/split.md)

[Reference for the calicoctl IPAM split command in Calico Open Source, used to split an existing IP pool into smaller pools.](https://docs.tigera.io/calico/latest/reference/calicoctl/ipam/split.md)

##### [calicoctl node](https://docs.tigera.io/calico/latest/reference/calicoctl/node/overview.md)

[Reference overview of the calicoctl node subcommands in Calico Open Source for managing the calico/node container.](https://docs.tigera.io/calico/latest/reference/calicoctl/node/overview.md)

##### [calicoctl node run](https://docs.tigera.io/calico/latest/reference/calicoctl/node/run.md)

[Reference for the calicoctl node run command in Calico Open Source, used to start a calico/node instance with the supplied options.](https://docs.tigera.io/calico/latest/reference/calicoctl/node/run.md)

##### [calicoctl node status](https://docs.tigera.io/calico/latest/reference/calicoctl/node/status.md)

[Reference for the calicoctl node status command in Calico Open Source, used to display BGP peer state and node liveness.](https://docs.tigera.io/calico/latest/reference/calicoctl/node/status.md)

##### [calicoctl node diags](https://docs.tigera.io/calico/latest/reference/calicoctl/node/diags.md)

[Reference for the calicoctl node diags command in Calico Open Source, used to collect diagnostics from a single Calico node.](https://docs.tigera.io/calico/latest/reference/calicoctl/node/diags.md)

##### [calicoctl node checksystem](https://docs.tigera.io/calico/latest/reference/calicoctl/node/checksystem.md)

[Reference for the calicoctl node check-system command in Calico Open Source, used to verify host kernel support for Calico features.](https://docs.tigera.io/calico/latest/reference/calicoctl/node/checksystem.md)

##### [calicoctl datastore](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/overview.md)

[Reference overview of the calicoctl datastore subcommands in Calico Open Source for migrating between etcdv3 and Kubernetes datastores.](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/overview.md)

##### [calicoctl datastore migrate](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/overview.md)

[Reference overview of the calicoctl datastore migrate subcommands in Calico Open Source for performing safe datastore migrations.](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/overview.md)

##### [calicoctl datastore migrate export](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/export.md)

[Reference for the calicoctl datastore migrate export command in Calico Open Source, used to export resources from an etcdv3 datastore.](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/export.md)

##### [calicoctl datastore migrate import](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/import.md)

[Reference for the calicoctl datastore migrate import command in Calico Open Source, used to import resources into a Kubernetes datastore.](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/import.md)

##### [calicoctl datastore migrate lock](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/lock.md)

[Reference for the calicoctl datastore migrate lock command in Calico Open Source, used to lock a datastore during migration.](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/lock.md)

##### [calicoctl datastore migrate unlock](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/unlock.md)

[Reference for the calicoctl datastore migrate unlock command in Calico Open Source, used to unlock a datastore after migration completes.](https://docs.tigera.io/calico/latest/reference/calicoctl/datastore/migrate/unlock.md)

##### [calicoctl version](https://docs.tigera.io/calico/latest/reference/calicoctl/version.md)

[Reference for the calicoctl version command in Calico Open Source, used to display client and cluster version information.](https://docs.tigera.io/calico/latest/reference/calicoctl/version.md)

## Resource definitions

##### [Resource definitions](https://docs.tigera.io/calico/latest/reference/resources/overview.md)

[Reference overview of the Calico Open Source API resources, including the manifest format and how calicoctl manages them.](https://docs.tigera.io/calico/latest/reference/resources/overview.md)

##### [BGP configuration](https://docs.tigera.io/calico/latest/reference/resources/bgpconfig.md)

[Reference for the BGPConfiguration resource in Calico Open Source that sets cluster-wide BGP options including the autonomous system number and route reflectors.](https://docs.tigera.io/calico/latest/reference/resources/bgpconfig.md)

##### [BGP peer](https://docs.tigera.io/calico/latest/reference/resources/bgppeer.md)

[Reference for the BGPPeer resource in Calico Open Source that defines a BGP neighbor relationship between Calico nodes and external routers.](https://docs.tigera.io/calico/latest/reference/resources/bgppeer.md)

##### [BGP Filter](https://docs.tigera.io/calico/latest/reference/resources/bgpfilter.md)

[Reference for the BGPFilter resource in Calico Open Source that filters routes imported from or exported to BGP peers.](https://docs.tigera.io/calico/latest/reference/resources/bgpfilter.md)

##### [Block affinity](https://docs.tigera.io/calico/latest/reference/resources/blockaffinity.md)

[Reference for the BlockAffinity resource in Calico Open Source that records which node owns each IP address management block.](https://docs.tigera.io/calico/latest/reference/resources/blockaffinity.md)

##### [Calico node status](https://docs.tigera.io/calico/latest/reference/resources/caliconodestatus.md)

[Reference for the CalicoNodeStatus resource in Calico Open Source that exposes per-node agent, BGP, and routing state.](https://docs.tigera.io/calico/latest/reference/resources/caliconodestatus.md)

##### [Felix configuration](https://docs.tigera.io/calico/latest/reference/resources/felixconfig.md)

[Reference for the FelixConfiguration resource in Calico Open Source that controls Felix data plane behavior across the cluster.](https://docs.tigera.io/calico/latest/reference/resources/felixconfig.md)

##### [Global network policy](https://docs.tigera.io/calico/latest/reference/resources/globalnetworkpolicy.md)

[Reference for the GlobalNetworkPolicy resource in Calico Open Source, a cluster-scoped policy that selects endpoints across all namespaces.](https://docs.tigera.io/calico/latest/reference/resources/globalnetworkpolicy.md)

##### [Global network set](https://docs.tigera.io/calico/latest/reference/resources/globalnetworkset.md)

[Reference for the GlobalNetworkSet resource in Calico Open Source that defines a cluster-scoped set of CIDRs referenced by network policy.](https://docs.tigera.io/calico/latest/reference/resources/globalnetworkset.md)

##### [Host endpoint](https://docs.tigera.io/calico/latest/reference/resources/hostendpoint.md)

[Reference for the HostEndpoint resource in Calico Open Source that represents a host network interface for policy enforcement.](https://docs.tigera.io/calico/latest/reference/resources/hostendpoint.md)

##### [IP pool](https://docs.tigera.io/calico/latest/reference/resources/ippool.md)

[Reference for the IPPool resource in Calico Open Source that defines CIDRs available for pod IP address allocation.](https://docs.tigera.io/calico/latest/reference/resources/ippool.md)

##### [IP reservation](https://docs.tigera.io/calico/latest/reference/resources/ipreservation.md)

[Reference for the IPReservation resource in Calico Open Source that excludes specific addresses or ranges from automatic allocation.](https://docs.tigera.io/calico/latest/reference/resources/ipreservation.md)

##### [IPAM configuration](https://docs.tigera.io/calico/latest/reference/resources/ipamconfig.md)

[Reference for the IP address management configuration resource in Calico Open Source that sets cluster-wide options such as strict affinity.](https://docs.tigera.io/calico/latest/reference/resources/ipamconfig.md)

##### [Kubernetes controllers configuration](https://docs.tigera.io/calico/latest/reference/resources/kubecontrollersconfig.md)

[Reference for the KubeControllersConfiguration resource in Calico Open Source that controls behavior of the kube-controllers component.](https://docs.tigera.io/calico/latest/reference/resources/kubecontrollersconfig.md)

##### [Network policy](https://docs.tigera.io/calico/latest/reference/resources/networkpolicy.md)

[Reference for the NetworkPolicy resource in Calico Open Source, a namespaced policy that selects pods within a single namespace.](https://docs.tigera.io/calico/latest/reference/resources/networkpolicy.md)

##### [Network set](https://docs.tigera.io/calico/latest/reference/resources/networkset.md)

[Reference for the NetworkSet resource in Calico Open Source that defines a namespaced set of CIDRs referenced by network policy.](https://docs.tigera.io/calico/latest/reference/resources/networkset.md)

##### [Node](https://docs.tigera.io/calico/latest/reference/resources/node.md)

[Reference for the Node resource in Calico Open Source that represents a host running the calico/node agent.](https://docs.tigera.io/calico/latest/reference/resources/node.md)

##### [Profile](https://docs.tigera.io/calico/latest/reference/resources/profile.md)

[Reference for the Profile resource in Calico Open Source that groups labels and rules applied to endpoints.](https://docs.tigera.io/calico/latest/reference/resources/profile.md)

##### [Workload endpoint](https://docs.tigera.io/calico/latest/reference/resources/workloadendpoint.md)

[Reference for the WorkloadEndpoint resource in Calico Open Source that represents a pod or VM interface for policy and IPAM.](https://docs.tigera.io/calico/latest/reference/resources/workloadendpoint.md)

## Configuring etcd RBAC

##### [Setting up etcd certificates for RBAC](https://docs.tigera.io/calico/latest/reference/etcd-rbac/overview.md)

[Reference overview of role-based access control for the etcdv3 datastore used by Calico Open Source covering users, roles, and permission scopes.](https://docs.tigera.io/calico/latest/reference/etcd-rbac/overview.md)

##### [Generating certificates](https://docs.tigera.io/calico/latest/reference/etcd-rbac/certificate-generation.md)

[Reference for generating Certificate Authority and client certificates that authenticate Calico Open Source components against the etcdv3 datastore.](https://docs.tigera.io/calico/latest/reference/etcd-rbac/certificate-generation.md)

##### [Creating users and roles](https://docs.tigera.io/calico/latest/reference/etcd-rbac/users-and-roles.md)

[Reference for defining etcdv3 users and roles that grant scoped access to Calico Open Source components.](https://docs.tigera.io/calico/latest/reference/etcd-rbac/users-and-roles.md)

##### [Segmenting etcd on Kubernetes (basic)](https://docs.tigera.io/calico/latest/reference/etcd-rbac/kubernetes.md)

[Reference for restricting user access to Kubernetes and Calico Open Source resources using role-based access control.](https://docs.tigera.io/calico/latest/reference/etcd-rbac/kubernetes.md)

##### [Segmenting etcd on Kubernetes (advanced)](https://docs.tigera.io/calico/latest/reference/etcd-rbac/kubernetes-advanced.md)

[Advanced reference for restricting user access to Calico Open Source components and calicoctl through Kubernetes role-based access control.](https://docs.tigera.io/calico/latest/reference/etcd-rbac/kubernetes-advanced.md)

##### [Calico key and path prefixes](https://docs.tigera.io/calico/latest/reference/etcd-rbac/calico-etcdv3-paths.md)

[Reference listing the etcdv3 key prefixes used by each Calico Open Source component for role-based access control configuration.](https://docs.tigera.io/calico/latest/reference/etcd-rbac/calico-etcdv3-paths.md)

## Felix

##### [Configuring Felix](https://docs.tigera.io/calico/latest/reference/felix/configuration.md)

[Reference for Felix configuration parameters in Calico Open Source covering environment variables, FelixConfiguration fields, and per-node overrides.](https://docs.tigera.io/calico/latest/reference/felix/configuration.md)

##### [Monitoring Felix with Prometheus](https://docs.tigera.io/calico/latest/reference/felix/prometheus.md)

[Prometheus metrics reference for Felix in Calico Open Source covering counters and gauges exposed for data plane health and policy evaluation.](https://docs.tigera.io/calico/latest/reference/felix/prometheus.md)

## Typha

##### [Typha overview](https://docs.tigera.io/calico/latest/reference/typha/overview.md)

[Reference overview of the Typha daemon in Calico Open Source explaining how it reduces datastore load and scales Felix to large clusters.](https://docs.tigera.io/calico/latest/reference/typha/overview.md)

##### [Configuring Typha](https://docs.tigera.io/calico/latest/reference/typha/configuration.md)

[Reference for Typha configuration parameters in Calico Open Source covering environment variables and config file options for scaling the Kubernetes datastore.](https://docs.tigera.io/calico/latest/reference/typha/configuration.md)

##### [Monitoring Typha with Prometheus](https://docs.tigera.io/calico/latest/reference/typha/prometheus.md)

[Prometheus metrics reference for Typha in Calico Open Source covering connection counts, cache health, and fan-out metrics.](https://docs.tigera.io/calico/latest/reference/typha/prometheus.md)

## Configuration on public clouds

##### [Amazon Web Services](https://docs.tigera.io/calico/latest/reference/public-cloud/aws.md)

[Reference for running Calico Open Source on Amazon Web Services covering supported networking modes, source/destination check requirements, and AWS-specific notes.](https://docs.tigera.io/calico/latest/reference/public-cloud/aws.md)

##### [Azure](https://docs.tigera.io/calico/latest/reference/public-cloud/azure.md)

[Reference for running Calico Open Source on Microsoft Azure covering supported networking modes, user-defined routes, and Azure platform notes.](https://docs.tigera.io/calico/latest/reference/public-cloud/azure.md)

##### [Google Compute Engine](https://docs.tigera.io/calico/latest/reference/public-cloud/gce.md)

[Reference for running Calico Open Source on Google Compute Engine covering supported networking modes and platform-specific routing requirements.](https://docs.tigera.io/calico/latest/reference/public-cloud/gce.md)

##### [IBM Cloud](https://docs.tigera.io/calico/latest/reference/public-cloud/ibm.md)

[Reference for running Calico Open Source on IBM Cloud covering supported networking modes and platform integration notes.](https://docs.tigera.io/calico/latest/reference/public-cloud/ibm.md)

## Host endpoints

##### [Host endpoints](https://docs.tigera.io/calico/latest/reference/host-endpoints/overview.md)

[Reference overview of host endpoint protection in Calico Open Source covering the model for securing host network interfaces with policy.](https://docs.tigera.io/calico/latest/reference/host-endpoints/overview.md)

##### [Creating policy for basic connectivity](https://docs.tigera.io/calico/latest/reference/host-endpoints/connectivity.md)

[Reference for the Calico Open Source failsafe policy that protects host endpoints from being cut off when host network policy is misconfigured.](https://docs.tigera.io/calico/latest/reference/host-endpoints/connectivity.md)

##### [Creating host endpoint objects](https://docs.tigera.io/calico/latest/reference/host-endpoints/objects.md)

[Reference for the HostEndpoint object in Calico Open Source describing how to represent a host network interface so policy can select it.](https://docs.tigera.io/calico/latest/reference/host-endpoints/objects.md)

##### [Selector-based policies](https://docs.tigera.io/calico/latest/reference/host-endpoints/selector.md)

[Reference for ordered host endpoint policies in Calico Open Source that match interfaces using label selectors.](https://docs.tigera.io/calico/latest/reference/host-endpoints/selector.md)

##### [Failsafe rules](https://docs.tigera.io/calico/latest/reference/host-endpoints/failsafe.md)

[Reference for the Calico Open Source failsafe inbound and outbound port lists that prevent host network policy from cutting off control-plane connectivity.](https://docs.tigera.io/calico/latest/reference/host-endpoints/failsafe.md)

##### [Pre-DNAT policy](https://docs.tigera.io/calico/latest/reference/host-endpoints/pre-dnat.md)

[Reference for pre-DNAT host endpoint policy in Calico Open Source that applies rules to ingress traffic before destination NAT rewrites the address.](https://docs.tigera.io/calico/latest/reference/host-endpoints/pre-dnat.md)

##### [Apply on forwarded traffic](https://docs.tigera.io/calico/latest/reference/host-endpoints/forwarded.md)

[Reference for the applyOnForward field on Calico Open Source host endpoint policy that determines how rules apply to forwarded traffic versus local processes.](https://docs.tigera.io/calico/latest/reference/host-endpoints/forwarded.md)

##### [Summary of host endpoint policies](https://docs.tigera.io/calico/latest/reference/host-endpoints/summary.md)

[Reference summary describing how the different Calico Open Source host endpoint policy types interact and affect packet flows.](https://docs.tigera.io/calico/latest/reference/host-endpoints/summary.md)

##### [Connection tracking](https://docs.tigera.io/calico/latest/reference/host-endpoints/conntrack.md)

[Reference covering Linux conntrack workarounds for Calico Open Source host endpoint policy when stateful tracking interferes with expected packet flow.](https://docs.tigera.io/calico/latest/reference/host-endpoints/conntrack.md)

## Architecture

##### [Component architecture](https://docs.tigera.io/calico/latest/reference/architecture/overview.md)

[Architectural overview reference of the Calico Open Source components including Felix, BIRD, confd, Typha, and the kube-controllers.](https://docs.tigera.io/calico/latest/reference/architecture/overview.md)

##### ['The Calico data path: IP routing and iptables'](https://docs.tigera.io/calico/latest/reference/architecture/data-path.md)

[Reference covering the Calico Open Source data path explaining how packets flow between workloads and to external destinations across networking modes.](https://docs.tigera.io/calico/latest/reference/architecture/data-path.md)

## VPP data plane

##### [Primary interface configuration](https://docs.tigera.io/calico/latest/reference/vpp/uplink-configuration.md)

[Reference for primary interface configuration parameters in the Calico Open Source VPP data plane.](https://docs.tigera.io/calico/latest/reference/vpp/uplink-configuration.md)

##### [VPP data plane implementation details](https://docs.tigera.io/calico/latest/reference/vpp/technical-details.md)

[Technical reference for the Calico Open Source VPP data plane integration covering packet processing, kernel offload, and graph nodes.](https://docs.tigera.io/calico/latest/reference/vpp/technical-details.md)

##### [Host network configuration](https://docs.tigera.io/calico/latest/reference/vpp/host-network.md)

[Reference covering the host network configuration applied by the Calico Open Source VPP data plane during initialization.](https://docs.tigera.io/calico/latest/reference/vpp/host-network.md)

## Other reference topics

##### [Component versions](https://docs.tigera.io/calico/latest/reference/component-versions.md)

[Component version reference listing the upstream container images and binaries shipped with each Calico Open Source release.](https://docs.tigera.io/calico/latest/reference/component-versions.md)

##### [Frequently asked questions](https://docs.tigera.io/calico/latest/reference/faq.md)

[Frequently asked questions about Calico Open Source covering networking modes, IP address management, BGP, policy behavior, and platform support.](https://docs.tigera.io/calico/latest/reference/faq.md)

##### [Getting involved](https://docs.tigera.io/calico/latest/reference/involved.md)

[Reference for getting involved with the Calico Open Source upstream project including source repositories, mailing lists, Slack, and contribution channels.](https://docs.tigera.io/calico/latest/reference/involved.md)

##### [Configuring calico/node](https://docs.tigera.io/calico/latest/reference/configure-calico-node.md)

[Reference for configuring the calico/node container in Calico Open Source through environment variables that control Felix, BIRD, and confd.](https://docs.tigera.io/calico/latest/reference/configure-calico-node.md)

##### [Configure resource requests and limits](https://docs.tigera.io/calico/latest/reference/configure-resources.md)

[Reference for setting Kubernetes resource requests and limits on Calico Open Source components managed by the Tigera Operator.](https://docs.tigera.io/calico/latest/reference/configure-resources.md)

##### [Configure the Calico CNI plugins](https://docs.tigera.io/calico/latest/reference/configure-cni-plugins.md)

[Reference for configuring the Calico Open Source CNI plugin and IPAM plugin through CNI network configuration files.](https://docs.tigera.io/calico/latest/reference/configure-cni-plugins.md)