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UERANSIM Helm chart

This is a Helm chart for deploying UERANSIM on Kubernetes. It has been tested only with free5GC but should also run with open5gs.

Prerequisites

  • A Kubernetes cluster ready to use. You can use kubeadm to create it.
  • Multus-CNI.
  • Helm3.
  • Kubectl (optional).
  • A physical network interface on each Kubernetes node named eth0. Note: If the name of network interfaces on your Kubernetes nodes is different from eth0, see Networks configuration.

Quickstart guide

Install UERANSIM

kubectl create ns <namespace>
helm -n <namespace> install <release-name> ./ueransim/

Check the state of the created pod

kubectl -n <namespace> get pods -l "app=ueransim"

Uninstall UERANSIM

helm -n <namespace> delete <release-name>

Or...

helm -n <namespace> uninstall <release-name>

Configuration

Testing with another 5G core network

This Helm chart has been tested only with free5GC but should also run with open5gs. If you want to test it with open5gs then you should only use the open5gs-values.yaml file to override the Helm chart default values.

helm -n <namespace> install -f ./ueransim/open5gs-values.yaml <release-name> ./ueransim/

Networks configuration

In this section, we'll suppose that you have at least one interface on each Kubernetes node and its name is toto. Then you have to set these parameters to toto:

  • global.n2network.masterIf
  • global.n3network.masterIf

Usage information

Once this helm chart installed, a PDU session will be crated automatically. Furthermore, a TUN interface will be created on the UE POD. This interface can be used to test the connectivity:

kubectl -n <namespace> exec -it <ue-pod-name> -- bash

Whithin the POD:

  • Verify that the TUN interface has been created. Its name should be uesimtun0.
ip address 
...
5: uesimtun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 500
    link/none 
    inet 10.1.0.1/32 scope global uesimtun0
       valid_lft forever preferred_lft forever
  • Use the TUN interface.
ping -I uesimtun0 www.google.com
traceroute -i uesimtun0 www.google.com
curl --interface uesimtun0 www.google.com

Customized installation

This chart allows you to customize its installation. The table below shows the parameters that can be modified before installing the chart or when upgrading it as well as their default values.

Global parameters

Parameter Description Default value
global.multiCluster Must be set to true if you are deploying the the UERANSIM in a different cluster from the one where AMF is deployed and global.amf.service.ngap.enabled is set to true. false
global.cpClusterIP The IP address of one of the cluster nodes where the control plane is deployed. nil
global.amf.service.ngap.name The name of the AMF NGAP service. amf-n2
global.amf.service.ngap.type The type of the AMF NGAP service. ClusterIP
global.amf.service.ngap.port The AMF NGAP port number. 38412
global.amf.service.ngap.nodeport The nodePort number to access the AMF NGAP service from outside of cluster. 31412
global.amf.service.ngap.protocol The protocol used for this service. SCTP
global.gnb.n3if.ipAddress The IP address of the UERANSIM’s N3 interface. 10.100.50.233

N2 Network parameters

Parameter Description Default value
global.n2network.name N2 network name. n2network
global.n2network.masterIf N2 network MACVLAN master interface. eth0
global.n2network.subnetIP N2 network subnet IP address. 10.100.50.248
global.n2network.cidr N2 network cidr. 29
global.n2network.gatewayIP N2 network gateway IP address. 10.100.50.254

N3 Network parameters

Parameter Description Default value
global.n3network.name N3 network name. n3network
global.n3network.masterIf N3 network MACVLAN master interface. eth0
global.n3network.subnetIP N3 network subnet IP address. 10.100.50.232
global.n3network.cidr N3 network cidr. 29
global.n3network.gatewayIP N3 network gateway IP address. 10.100.50.238

Common parameters

Parameter Description Default value
projectName The name of UERANSIM application (used in labels). ueransim

gNB parameters

Parameter Description Default value
gnb.enabled If true then deploy the UERANSIM gNB. true
gnb.name Th name of the gNB (used in labels and when naming the deployment). gnb
gnb.replicaCount The number of gNB replicas 1
gnb.image.name The gNB Docker image name. towards5gs/ueransim-gnb
gnb.image.tag The gNB Docker image tag. defaults to the chart AppVersion
gnb.configmap.name The name of the configmap to be used to import the configuration to the gNB POD. gnb-configmap
gnb.volume.name The name of the volume to be mounted to the gNB POD. gnb-volume
gnb.volume.mount The path to the folder where configuration files should be mounted on the gNB POD. /ueransim/config
gnb.service.name The name of the service to expose the RADIO interface. gnb-service
gnb.service.type The type of the service to expose the RADIO interface. ClusterIP
gnb.service.port The port number used for the RADIO interface. 4997
gnb.service.protocol The protocol used for the RADIO interface. UDP
gnb.n2if.ipAddress The IP address of gNB’s N2 interface. 10.100.50.250
gnb.n3if.ipAddress The IP address of gNB’s N3 interface. 10.100.50.250
gnb.amf.n2if.ipAddress The IP address of the AMF’s N2 interface. 10.100.50.249
gnb.amf.n2if.port AMF NGAP port number. 10.100.50.249
gnb.amf.service.ngap.enabled If true then a Kubernetes service will be used to access the AMF NGAP service instead of accessing directly the AMF’s N2 interface. gnb.amf.n2if.ipAddress must be set to the name of the service or IP address of a node where AMF is deployed. false
gnb.configuration The UERANSIM gNB configuration in plain text. Check values.yaml
gnb.podAnnotations Pod annotations. {}
gnb.imagePullSecrets Image pull secrets. []
gnb.podSecurityContext Pod secutity context. []
gnb.resources CPU and memory requests and limits. see values.yaml
gnb.nodeSelector Node selector. {}
gnb.tolerations Tolerations. {}
gnb.affinity Affinity. {}

UE parameters

Parameter Description Default value
ue.enabled If true then deploy the UERANSIM UE. true
ue.name Th name of the UE (used in labels and when naming the deployment). ue
ue.replicaCount The number of UE replicas 1
ue.image.name The UE Docker image name. towards5gs/ueransim-ue
ue.image.tag The UE Docker image tag. defaults to the chart AppVersion
ue.configmap.name The name of the configmap to be used to import the configuration to the UE POD. ue-configmap
ue.volume.name The name of the volume to be mounted to the UE POD. ue-volume
ue.volume.mount The path to the folder where configuration files should be mounted on the UE POD. /ueransim/config
ue.command The command to be executed to run the UERANSIM UE. "../build/nr-ue -c ./ue-config.yaml"
ue.script A script to be executed after running the UERANSIM UE. It may be used to periodically generate traffic for example. ""
ue.configuration The UERANSIM UE configuration in plain text. Check values.yaml

Reference