I am trying to deploy the free5gc core in k8s using microk8s and I have this problem only with the UPF function. This is the error I get when I start the function with the command written inside the Dockerfile as ENTRYPOINT:
2022-04-12T13:13:40Z [INFO][UPF][Util] UPF log: /log/upf.log
2022-04-12T13:13:40Z [INFO][UPF][Util] Config: /upfcfg.yaml
2022-04-12T13:13:40Z [INFO][UPF][Util] UPF config version [1.0.0]
2022-04-12T13:13:40Z [INFO][UPF][Util] Set log level: info
2022-04-12T13:13:40Z [WARN][UPF][Util] Unknown key "DefaultServiceIP" of configuration
2022-04-12T13:13:40Z [ERRO][UPF][Util]
2022-04-12T13:13:40Z [INFO][UPF][Util] DNN routes added, main routing table:
2022-04-12T13:13:40Z [INFO][UPF][Util] DstIp Gateway Iface Priority RtProto Type
2022-04-12T13:13:40Z [INFO][UPF][Util] 169.254.1.1 /32 0.0.0.0 eth0 0 boot unicast
2022-04-12T13:13:40Z [INFO][UPF][Util] 60.60.0.0 /24 0.0.0.0 upfgtp 0 static unicast
2022-04-12T13:13:40Z [INFO][UPF][Util] 0.0.0.0 /0 169.254.1.1 eth0 0 boot unicast
2022-04-12T13:13:40Z [ERRO][UPF][Util] No PFCP Server
2022-04-12T13:13:40Z [ERRO][UPF][Util]
2022-04-12T13:13:40Z [ERRO][UPF][Util] UPF - PFCP error when UPF initializes
2022-04-12T13:13:40Z [ERRO][UPF][Util] UPF failed to initialize
2022-04-12T13:13:40Z [INFO][UPF][Util] Removing DNN routes
But if I delete the ENTRYPOINT inside the Dockerfile, start the pod, entering inside the container and then running the function manually, it works:
2022-04-12T13:13:40Z [INFO][UPF][Util] UPF log: /log/upf.log
2022-04-12T13:13:40Z [INFO][UPF][Util] Config: /upfcfg.yaml
2022-04-12T13:13:40Z [INFO][UPF][Util] UPF config version [1.0.0]
2022-04-12T13:13:40Z [INFO][UPF][Util] Set log level: info
2022-04-12T13:13:40Z [WARN][UPF][Util] Unknown key "DefaultServiceIP" of configuration
2022-04-12T13:13:40Z [INFO][UPF][Util] DNN routes added, main routing table:
2022-04-12T13:13:40Z [INFO][UPF][Util] DstIp Gateway Iface Priority RtProto Type
2022-04-12T13:13:40Z [INFO][UPF][Util] 169.254.1.1 /32 0.0.0.0 eth0 0 boot unicast
2022-04-12T13:13:40Z [INFO][UPF][Util] 60.60.0.0 /24 0.0.0.0 upfgtp 0 static unicast
2022-04-12T13:13:40Z [INFO][UPF][Util] 0.0.0.0 /0 169.254.1.1 eth0 0 boot unicast
2022-04-12T13:13:40Z [INFO][UPF][Util] Removing DNN routes
This is the Dockerfile of the UPF function:
FROM ubuntu:20.04
COPY . .
COPY libgtp5gnl.so.0 /usr/local/lib
COPY liblogger.so /usr/local/lib
RUN apt-get update && apt-get install -y net-tools vim iputils-ping libmnl-dev libyaml-dev
#ENTRYPOINT ["./free5gc-upfd", "-c", "upfcfg.yaml"]
CMD ["sh", "-c", "tail -f /dev/null"]
In order to be able to run the function, I have a configuration file(upfcfg.yaml) that must be specified. This is the command that must be run in order to start the UPF:
./free5gc-upfd -c upfcfg.yaml
This is the configuration file:
info:
version: 1.0.0
description: UPF configuration
configuration:
# the kind of log output
# debugLevel: how detailed to output, value: trace, debug, info, warn, error, fatal, panic
# ReportCaller: enable the caller report or not, value: true or false
debugLevel: info
ReportCaller: false
# packetBufferHoldTime should be longer than Paging retry-out time of AMF.
# unit: seconds
packetBufferHoldTime: 30
DefaultServiceIP: upf-service
# The IP list of the N4 interface on this UPF (Can't set to 0.0.0.0)
pfcp:
- addr: upf-service
# The IP list of the N3/N9 interfaces on this UPF
# If there are multiple connection, set addr to 0.0.0.0 or list all the addresses
gtpu:
- addr: 0.0.0.0
# [optional] gtpu.name
# - name: upf.5gc.nctu.me
# [optional] gtpu.ifname
# - ifname: gtpif
# The DNN list supported by UPF
dnn_list:
- dnn: internet # Data Network Name
cidr: 60.60.0.0/24 # Classless Inter-Domain Routing for assigned IPv4 pool of UE
# [optional] dnn_list[*].natifname
# natifname: eth0
where upf-service is the name of the Service created in k8s.
This is the yaml file for the UPF Service:
apiVersion: v1
kind: Service
metadata:
name: upf-service
labels:
app: free5gc-upf
spec:
type: ClusterIP
selector:
app: free5gc-upf
clusterIP: None
ports:
- name: sbi
targetPort: 29518
port: 29518
protocol: TCP
- name: upf-n3
protocol: UDP
targetPort: 2152
port: 2152
- name: upf-n4
targetPort: 8805
port: 8805
protocol: UDP
And the yaml file for the Deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
name: upf-deployment
spec:
selector:
matchLabels:
app: free5gc-upf
replicas: 1
template:
metadata:
labels:
app: free5gc-upf
spec:
containers:
- name: myapp-container
image: andresache/upf
ports:
- containerPort: 29518
name: upf-sbi
protocol: TCP
- containerPort: 2152
name: upf-n3
protocol: UDP
- containerPort: 8805
name: upf-n4
protocol: UDP
imagePullPolicy: Always
securityContext:
privileged: true
capabilities:
add: ["NET_ADMIN", "NET_RAW", "NET_BIND_SERVICE", "SYS_TIME"]
# lifecycle:
#postStart:
#exec:
# command: ["/bin/sh", "-c", "sleep 5; ./free5gc-upfd -c upfcfg.yaml"]
dnsPolicy: ClusterFirst
About the source code of the upf function, I will leave the link with the repository that contains it, as it is pretty long and complex: https://github.com/free5gc/upf/tree/31b765226b2ad862df3e373234c60dfd6ff1e782/src
Do you have any idea why it works inside the container, but not otherwise? Thanks!
