Merge branch 'jinja2-config' into 'develop'

feat(config): changing the configuration file to jinja2-based approach

See merge request oai/cn5g/oai-cn5g-smf!167

build/scripts/smf_conf.sh

-# prompt has been removed for easier Ctrl+C Ctrl+V
-# please update the following information according to your configuration
-
-INSTANCE=1
-PREFIX='/usr/local/etc/oai'
-mkdir -m 0777 -p $PREFIX
-cp ../../etc/smf.conf  $PREFIX
-
-declare -A SMF_CONF
-
-SMF_CONF[@INSTANCE@]=$INSTANCE
-# SMF_CONF[@PREFIX@]=$PREFIX
-SMF_CONF[@PID_DIRECTORY@]='/var/run'
-
-SMF_CONF[@SMF_INTERFACE_NAME_FOR_N4@]='wlo1'
-SMF_CONF[@SMF_INTERFACE_NAME_FOR_SBI@]='wlo1'
-
-SMF_CONF[@SMF_INTERFACE_PORT_FOR_SBI@]='80'
-SMF_CONF[@SMF_INTERFACE_HTTP2_PORT_FOR_SBI@]='9090'
-SMF_CONF[@SMF_API_VERSION@]='v1'
-
-SMF_CONF[@DNN_NI0@]='oai.ipv4'
-SMF_CONF[@TYPE0@]='IPv4'
-SMF_CONF[@DNN_RANGE0@]='12.1.1.2 - 12.1.1.128'
-
-SMF_CONF[@DNN_NI1@]='default'
-SMF_CONF[@TYPE1@]='IPv4'
-SMF_CONF[@DNN_RANGE1@]='12.2.1.2 - 12.2.1.128'
-
-SMF_CONF[@DNN_NI2@]='oai'
-SMF_CONF[@TYPE2@]='IPv4'
-SMF_CONF[@DNN_RANGE2@]='12.1.1.129 - 12.1.1.224'
-
-SMF_CONF[@DNN_NI3@]='ims'
-SMF_CONF[@TYPE3@]='IPv4'
-SMF_CONF[@DNN_RANGE3@]='12.2.1.129 - 12.2.1.224'
-
-SMF_CONF[@USE_NETWORK_INSTANCE@]='no'
-SMF_CONF[@USE_LOCAL_SUBSCRIPTION_INFO@]='yes'
-SMF_CONF[@DOMAIN_ACCESS@]='access.oai.org'
-SMF_CONF[@DOMAIN_CORE@]='core.oai.org'
-SMF_CONF[@USE_FQDN_DNS@]='no'
-SMF_CONF[@ENABLE_USAGE_REPORTING@]='no'
-
-
-SMF_CONF[@REGISTER_NRF@]='no'
-SMF_CONF[@DISCOVER_UPF@]='no'
-SMF_CONF[@HTTP_VERSION@]='1'
-
-SMF_CONF[@UE_MTU@]='1358'
-
-SMF_CONF[@NSSAI_SST0@]='222'
-SMF_CONF[@NSSAI_SD0@]='123'
-SMF_CONF[@NSSAI_SST1@]='1'
-SMF_CONF[@NSSAI_SD1@]='0xFFFFFF'
-SMF_CONF[@NSSAI_SST2@]='2'
-SMF_CONF[@NSSAI_SD2@]='2'
-
-SMF_CONF[@QOS_PROFILE_5QI0@]='6'
-SMF_CONF[@QOS_PROFILE_5QI1@]='7'
-SMF_CONF[@QOS_PROFILE_5QI2@]='8'
-
-SMF_CONF[@SESSION_AMBR_UL0@]='20Mbps'
-SMF_CONF[@SESSION_AMBR_UL1@]='220Mbps'
-SMF_CONF[@SESSION_AMBR_UL2@]='20Mbps'
-
-SMF_CONF[@SESSION_AMBR_DL0@]='20Mbps'
-SMF_CONF[@SESSION_AMBR_DL1@]='220Mbps'
-SMF_CONF[@SESSION_AMBR_DL2@]='20Mbps'
-
-
-SMF_CONF[@UDM_IPV4_ADDRESS@]='172.16.1.103'
-SMF_CONF[@UDM_PORT@]='80'
-SMF_CONF[@UDM_API_VERSION@]='v2'
-SMF_CONF[@UDM_FQDN@]='oai-udm'
-
-SMF_CONF[@AMF_IPV4_ADDRESS@]='192.168.74.195'
-SMF_CONF[@AMF_PORT@]='80'
-SMF_CONF[@AMF_API_VERSION@]='v1'
-SMF_CONF[@AMF_FQDN@]='oai-amf'
-
-SMF_CONF[@UPF_IPV4_ADDRESS@]='192.168.12.245'
-SMF_CONF[@UPF_FQDN_0@]='oai-upf0'
-
-SMF_CONF[@NRF_IPV4_ADDRESS@]='127.0.0.1'
-SMF_CONF[@NRF_PORT@]='8080'
-SMF_CONF[@NRF_API_VERSION@]='v1'
-SMF_CONF[@NRF_FQDN@]='oai-nrf'
- 
-SMF_CONF[@DEFAULT_DNS_IPV4_ADDRESS@]='8.8.8.8'
-SMF_CONF[@DEFAULT_DNS_SEC_IPV4_ADDRESS@]='4.4.4.4'
-
-for K in "${!SMF_CONF[@]}"; do 
-  egrep -lRZ "$K" $PREFIX | xargs -0 -l sed -i -e "s|$K|${SMF_CONF[$K]}|g"
-  ret=$?;[[ ret -ne 0 ]] && echo "Tried to replace $K with ${SMF_CONF[$K]}"
-done

build/scripts/smf_local_conf.sh

@@ -11,31 +11,28 @@ PREFIX='/usr/local/etc/oai'
 sudo mkdir -m 0777 -p $PREFIX
 cp ../../etc/smf.conf  $PREFIX
 
-declare -A SMF_CONF
-
-SMF_CONF[@INSTANCE@]=$INSTANCE
-SMF_CONF[@PREFIX@]=$PREFIX
-SMF_CONF[@PID_DIRECTORY@]='/var/run'
-
-SMF_CONF[@SMF_INTERFACE_NAME_FOR_N4@]='eno1:sn4'
-SMF_CONF[@SMF_INTERFACE_NAME_FOR_SBI@]='eno1:smf'
-
-SMF_CONF[@SMF_INTERFACE_IPV4_ADDRESS_FOR_SBI@]='172.16.1.101'
-SMF_CONF[@SMF_INTERFACE_PORT_FOR_SBI@]='80'
-SMF_CONF[@SMF_INTERFACE_HTTP2_PORT_FOR_SBI@]='9090'
-
-SMF_CONF[@UDM_IPV4_ADDRESS@]='172.16.1.103'
-SMF_CONF[@UDM_PORT@]='80'
-
-SMF_CONF[@AMF_IPV4_ADDRESS@]='172.16.1.102'
-SMF_CONF[@AMF_PORT@]='80'
-
-SMF_CONF[@UPF_IPV4_ADDRESS@]='172.16.2.102'
-
-SMF_CONF[@DEFAULT_DNS_IPV4_ADDRESS@]='8.8.8.8'
-SMF_CONF[@DEFAULT_DNS_SEC_IPV4_ADDRESS@]='4.4.4.4'
-
-for K in "${!SMF_CONF[@]}"; do 
-  egrep -lRZ "$K" $PREFIX | xargs -0 -l sed -i -e "s|$K|${SMF_CONF[$K]}|g"
-  ret=$?;[[ ret -ne 0 ]] && echo "Tried to replace $K with ${SMF_CONF[$K]}"
-done
+export CONFIG_FILE=$PREFIX/smf.conf
+export MOUNT_CONFIG=NO
+
+export INSTANCE=1
+export SMF_INTERFACE_NAME_FOR_N4='eno1:sn4'
+export SMF_INTERFACE_NAME_FOR_SBI='eno1:smf'
+export UDM_IPV4_ADDRESS='172.16.1.103'
+export UDM_PORT='80'
+export AMF_IPV4_ADDRESS='172.16.1.102'
+export AMF_PORT='80'
+export UPF_IPV4_ADDRESS='172.16.2.102'
+
+export DEFAULT_DNS_IPV4_ADDRESS='8.8.8.8'
+export DEFAULT_DNS_SEC_IPV4_ADDRESS='4.4.4.4'
+
+# One mandatory slice
+export DNN_NI0=oai
+export TYPE0=IPv4
+export DNN_RANGE0='12.1.1.151 - 12.1.1.253'
+export NSSAI_SST0=1
+#export NSSAI_SD0=123
+export SESSION_AMBR_UL0=800Mbps
+export SESSION_AMBR_DL0=1000Mbps
+
+../../scripts/entrypoint.py

ci-scripts/docker/Dockerfile.ci.ubuntu

@@ -55,6 +55,8 @@ ENV TZ=Europe/Paris
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get upgrade --yes && \
     DEBIAN_FRONTEND=noninteractive apt-get install --yes \
+      python3 \
+      python3-jinja2 \
       psmisc \
       net-tools \
       bc \
@@ -89,7 +91,7 @@ RUN apt-get update && \
 WORKDIR /openair-smf/bin
 COPY --from=oai-smf-builder \
     /openair-smf/build/smf/build/oai_smf \
-    /openair-smf/scripts/entrypoint.sh \
+    /openair-smf/scripts/entrypoint.py \
     /openair-smf/scripts/healthcheck.sh \
     ./
 
@@ -124,5 +126,5 @@ HEALTHCHECK --interval=10s \
             --retries=6 \
     CMD /openair-smf/bin/healthcheck.sh
 
-ENTRYPOINT ["/bin/bash","/openair-smf/bin/entrypoint.sh"]
+ENTRYPOINT ["python3","/openair-smf/bin/entrypoint.py"]
 CMD ["/openair-smf/bin/oai_smf", "-c", "/openair-smf/etc/smf.conf", "-o"]

ci-scripts/flatten_image.py

@@ -80,7 +80,7 @@ def perform_flattening(tag):
     cmd += ' --change "EXPOSE 8805/udp" '
     cmd += ' --change "HEALTHCHECK --interval=10s --timeout=15s --retries=6 CMD /openair-smf/bin/healthcheck.sh" '
     cmd += ' --change "CMD [\\"/openair-smf/bin/oai_smf\\", \\"-c\\", \\"/openair-smf/etc/smf.conf\\", \\"-o\\"]" '
-    cmd += ' --change "ENTRYPOINT [\\"/bin/bash\\", \\"/openair-smf/bin/entrypoint.sh\\"]" '
+    cmd += ' --change "ENTRYPOINT [\\"python3\\", \\"/openair-smf/bin/entrypoint.py\\"]" '
     cmd += ' - ' + image_prefix + tag
     print (cmd)
     subprocess.check_output(cmd, shell=True, universal_newlines=True)

docker/Dockerfile.smf.rhel8

@@ -96,6 +96,8 @@ COPY ./rhsm-ca /etc/rhsm/ca
 RUN rm -f /etc/rhsm-host && \
     microdnf update -y && \
     microdnf install -y \
+      python3 \
+      python3-pip \
       tzdata \
 #      libasan \
       procps-ng \
@@ -106,6 +108,7 @@ RUN rm -f /etc/rhsm-host && \
       libevent \
       findutils \
       libconfig && \
+    pip3 install jinja2 && \
     microdnf clean all -y && \
     rm -rf /var/cache/yum /var/cache/dnf && \
     # Remove entitlements and Subscription Manager configs
@@ -116,7 +119,7 @@ RUN rm -f /etc/rhsm-host && \
 WORKDIR /openair-smf/bin
 COPY --from=oai-smf-builder \
     /openair-smf/build/smf/build/oai_smf \
-    /openair-smf/scripts/entrypoint.sh \
+    /openair-smf/scripts/entrypoint.py \
     /openair-smf/scripts/healthcheck.sh \
     ./
 
@@ -145,5 +148,5 @@ HEALTHCHECK --interval=10s \
             --retries=6 \
     CMD /openair-smf/bin/healthcheck.sh
 
-ENTRYPOINT ["/openair-smf/bin/entrypoint.sh"]
+ENTRYPOINT ["python3", "/openair-smf/bin/entrypoint.py"]
 CMD ["/openair-smf/bin/oai_smf", "-c", "/openair-smf/etc/smf.conf", "-o"]

docker/Dockerfile.smf.ubuntu

@@ -77,6 +77,8 @@ ENV TZ=Europe/Paris
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get upgrade --yes && \
     DEBIAN_FRONTEND=noninteractive apt-get install --yes \
+      python3 \
+      python3-jinja2 \
       psmisc \
       net-tools \
       bc \
@@ -111,7 +113,7 @@ RUN apt-get update && \
 WORKDIR /openair-smf/bin
 COPY --from=oai-smf-builder \
     /openair-smf/build/smf/build/oai_smf \
-    /openair-smf/scripts/entrypoint.sh \
+    /openair-smf/scripts/entrypoint.py \
     /openair-smf/scripts/healthcheck.sh \
     ./
 
@@ -146,5 +148,5 @@ HEALTHCHECK --interval=10s \
             --retries=6 \
     CMD /openair-smf/bin/healthcheck.sh
 
-ENTRYPOINT ["/bin/bash","/openair-smf/bin/entrypoint.sh"]
+ENTRYPOINT ["python3","/openair-smf/bin/entrypoint.py"]
 CMD ["/openair-smf/bin/oai_smf", "-c", "/openair-smf/etc/smf.conf", "-o"]

etc/README.md

+ jinj2-generated configuration file #
+
+We are switching to `python3-jinja2` tool in order to generate more complex configuration for our 5G core network functions.
+
+Pre-requisites: install python3 and jinja2 packages:
+
+```bash
+sudo apt-get install -y python3 python3-jinja2
+# or
+sudo yum install -y python3 python3-pip
+pip3 install jinja2
+```
+
+In a container deployment, you will still have to provide environment variables through a `docker-compose-file` or helm charts.
+
+But you can also emulate how the entrypoint behaves locally on your workspace.
+
+## Simple one-slice deployment ##
+
+Create a `test-jinja.sh` file and edit it:
+
+```bash
+$ vi test-jinja.sh
+cp ./etc/smf.conf ./etc/smf_copy.conf
+export CONFIG_FILE=./etc/smf_copy.conf
+export MOUNT_CONFIG=NO
+export TZ=Europe/Paris
+export SMF_INTERFACE_NAME_FOR_N4=eth0
+export SMF_INTERFACE_NAME_FOR_SBI=eth0
+export DEFAULT_DNS_IPV4_ADDRESS=172.21.3.100
+export DEFAULT_DNS_SEC_IPV4_ADDRESS=8.8.8.8
+export REGISTER_NRF=yes
+export DISCOVER_UPF=yes
+export USE_LOCAL_SUBSCRIPTION_INFO=yes
+export USE_FQDN_DNS=yes
+
+export AMF_IPV4_ADDRESS=192.168.70.132
+export AMF_FQDN=oai-amf
+export UDM_IPV4_ADDRESS=192.168.70.137
+export UDM_API_VERSION=v2
+export UDM_FQDN=oai-udm
+export NRF_IPV4_ADDRESS=192.168.70.130
+export NRF_FQDN=oai-nrf
+export UPF_IPV4_ADDRESS=192.168.70.134
+export UPF_FQDN_0=oai-spgwu
+
+export DNN_NI0=oai
+export TYPE0=IPv4
+export DNN_RANGE0='12.1.1.151 - 12.1.1.253'
+export NSSAI_SST0=1
+#export NSSAI_SD0=123
+export SESSION_AMBR_UL0=200Mbps
+export SESSION_AMBR_DL0=400Mbps
+
+./scripts/entrypoint.py
+$ chmod 755 test-jinja.sh
+$ ./test-jinja2.sh 
+Configuration file ./etc/smf_copy.conf is ready
+```
+
+## List of fields ##
+
+### Features ###
+
+Here is the current list of fields, with their mandatory status and any default values.
+
+If there is no default value associated to a field, it means it is **MANDATORY** to provide one.
+
+| Field Name | Mandatory / Optional | Default value if any |
+|:-----------|----------------------|---------------------:|
+| INSTANCE | Optional | 0 |
+| PID_DIRECTORY | Optional | /var/run |
+| UE_MTU | Optional | 1500 |
+| REGISTER_NRF | Optional | no |
+| DISCOVER_UPF | Optional | no |
+| DISCOVER_PCF | Optional | no |
+| USE_LOCAL_SUBSCRIPTION_INFO | Optional | no |
+| USE_LOCAL_PCC_RULES | Optional | yes |
+| USE_FQDN_DNS | Optional | no |
+| HTTP_VERSION | Optional | 1 |
+| USE_NETWORK_INSTANCE | Optional | 1 |
+| ENABLE_USAGE_REPORTING | Optional | no |
+
+### Networking ###
+
+| Field Name | Mandatory / Optional | Default value if any |
+|:-----------|----------------------|---------------------:|
+| SMF_INTERFACE_NAME_FOR_N4 | Mandatory | |
+| SMF_INTERFACE_NAME_FOR_SBI | Mandatory | |
+| SMF_INTERFACE_PORT_FOR_SBI | Optional | 80 |
+| SMF_INTERFACE_HTTP2_PORT_FOR_SBI | Optional | 8080 |
+| SMF_API_VERSION | Optional | v1 |
+| DEFAULT_DNS_IPV4_ADDRESS | Mandatory | |
+| DEFAULT_DNS_SEC_IPV4_ADDRESS | Mandatory | |
+| DEFAULT_CSCF_IPV4_ADDRESS | Optional | 127.0.0.1 |
+| AMF_HOSTNAME | Optional | |
+| AMF_IPV4_ADDRESS | Mandatory if AMF_HOSTNAME not defined | 0.0.0.0 |
+| AMF_PORT | Optional | 80 |
+| AMF_API_VERSION | Optional | v1 |
+| AMF_FQDN | Optional | localhost |
+| UDM_HOSTNAME | Optional | |
+| UDM_IPV4_ADDRESS | Mandatory if UDM_HOSTNAME not defined | 0.0.0.0 |
+| UDM_PORT | Optional | 80 |
+| UDM_API_VERSION | Optional | v1 |
+| UDM_FQDN | Optional | localhost |
+| NRF_HOSTNAME | Optional | |
+| NRF_IPV4_ADDRESS | Mandatory if NRF_HOSTNAME not defined | 0.0.0.0 |
+| NRF_PORT | Optional | 80 |
+| NRF_API_VERSION | Optional | v1 |
+| NRF_FQDN | Optional | localhost |
+| PCF_HOSTNAME | Optional | |
+| PCF_IPV4_ADDRESS | Mandatory if PCF_HOSTNAME not defined | 0.0.0.0 |
+| PCF_PORT | Optional | 80 |
+| PCF_API_VERSION | Optional | v1 |
+| PCF_FQDN | Optional | localhost |
+
+Currently we are supporting only one UPF.
+
+| Field Name | Mandatory / Optional | Default value if any |
+|:-----------|----------------------|---------------------:|
+| UPF0_HOSTNAME | Optional | |
+| UPF_IPV4_ADDRESS | Mandatory if UPF0_HOSTNAME not defined | 0.0.0.0 |
+| UPF_FQDN_0 | Optional | localhost |
+| DOMAIN_ACCESS_0 | Optional | access.oai.org |
+| DOMAIN_CORE_0 | Optional | core.oai.org |
+
+### Slice Management ###
+
+At least 1 slice (`SLICE0`) **SHALL** be configured. See example in first section above.
+
+We currently support up to 4 slices. When configuring, please do in order (`SLICE0`, `SLICE1`, ...).
+
+The mandatory keywords per slice are `DNN_NIx` and `NSSAI_SSTx`. Once they are both defined for a slice, all parameters **SHALL** be defined.
+
+| Field Name | Mandatory / Optional | Default value if any |
+|:-----------|----------------------|---------------------:|
+| DNN_NIx | Mandatory | |
+| TYPEx | Optional | IPv4 |
+| DNN_RANGEx | Mandatory | |
+| NSSAI_SSTx | Mandatory | |
+| NSSAI_SDx | Optional | 0xFFFFFF |
+| QOS_PROFILE_5QIx | Optional | 6 or 7 or 8 or 9 |
+| SESSION_AMBR_ULx | Optional | 20Mbps |
+| SESSION_AMBR_DLx | Optional | 22Mbps |
+
+`DNN_RANGEx` shall be formatted like this : `'12.2.1.2 - 12.2.1.128'`.
+
+See example in first section above.

scripts/entrypoint.py

+#!/usr/bin/env python3
+################################################################################
+# Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The OpenAirInterface Software Alliance licenses this file to You under
+# the OAI Public License, Version 1.1  (the "License"); you may not use this file
+# except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.openairinterface.org/?page_id=698
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#-------------------------------------------------------------------------------
+# For more information about the OpenAirInterface (OAI) Software Alliance:
+#      contact@openairinterface.org
+################################################################################
+
+from jinja2 import Environment, FileSystemLoader
+import socket
+import os
+import sys
+
+CONFIG_FILE = str(os.getenv('CONFIG_FILE','/openair-smf/etc/smf.conf'))
+MOUNT_CONFIG = str(os.getenv('MOUNT_CONFIG','no')).lower()
+
+def resolve(hostname):
+    try:
+        return socket.gethostbyname(hostname)
+    except socket.error:
+        print(f"Not able to resolve {hostname}")
+
+def render(filepath,funcs,values):
+    env = Environment(loader=FileSystemLoader(os.path.dirname(filepath)))
+    jinja_template = env.get_template(os.path.basename(filepath))
+    jinja_template.globals.update(funcs)
+    template_string = jinja_template.render(env=values)
+    return template_string
+
+env_variables = dict()
+#list of all the environment variables
+for name, value in os.environ.items():
+    env_variables.update({name:value})
+
+if MOUNT_CONFIG != "yes":
+    output = render(CONFIG_FILE,{"resolve":resolve},env_variables)
+    with open(CONFIG_FILE, "w") as fh:
+        fh.write(output)
+    print(f"Configuration file {CONFIG_FILE} is ready")
+    if len(sys.argv) == 1:
+        sys.exit(0)
+    os.execvp(sys.argv[1], sys.argv[1:])     #important for running the network function it works like exec $@
+else:
+    print("Configuration file is mounted to the network function")

scripts/entrypoint.sh

-#!/bin/bash
-
-set -euo pipefail
-
-CONFIG_DIR="/openair-smf/etc"
-
-# Default values
-ENABLE_USAGE_REPORTING=${ENABLE_USAGE_REPORTING:-no}
-USE_NETWORK_INSTANCE=${USE_NETWORK_INSTANCE:-no}
-USE_LOCAL_SUBSCRIPTION_INFO=${USE_LOCAL_SUBSCRIPTION_INFO:-yes}
-DOMAIN_ACCESS=${DOMAIN_ACCESS:-access.oai.org}
-DOMAIN_CORE=${DOMAIN_CORE:-core.oai.org}
-UE_MTU=${UE_MTU:-1358}
-NSSAI_SST0=${NSSAI_SST0:-222}
-NSSAI_SD0=${NSSAI_SD0:-123}
-NSSAI_SST1=${NSSAI_SST1:-1}
-NSSAI_SD1=${NSSAI_SD1:-1}
-NSSAI_SST2=${NSSAI_SST2:-1}
-NSSAI_SD2=${NSSAI_SD2:-1}
-QOS_PROFILE_5QI0=${QOS_PROFILE_5QI0:-6}
-QOS_PROFILE_5QI1=${QOS_PROFILE_5QI1:-7}
-QOS_PROFILE_5QI2=${QOS_PROFILE_5QI2:-8}
-SESSION_AMBR_UL0=${SESSION_AMBR_UL0:-20Mbps}
-SESSION_AMBR_DL0=${SESSION_AMBR_DL0:-22Mbps}
-SESSION_AMBR_UL1=${SESSION_AMBR_UL1:-20Mbps}
-SESSION_AMBR_DL1=${SESSION_AMBR_DL1:-22Mbps}
-SESSION_AMBR_UL2=${SESSION_AMBR_UL2:-20Mbps}
-SESSION_AMBR_DL2=${SESSION_AMBR_DL2:-22Mbps}
-
-PCF_IPV4_ADDRESS=${PCF_IPV4_ADDRESS:-0.0.0.0}
-PCF_PORT=${PCF_PORT:-80}
-PCF_API_VERSION=${PCF_API_VERSION:-"v1"}
-PCF_FQDN=${PCF_FQDN:-"oai-pcf"}
-DISCOVER_PCF=${DISCOVER_PCF:-"no"}
-USE_LOCAL_PCC_RULES=${USE_LOCAL_PCC_RULES:-"yes"}
-
-
-if [[ ${USE_FQDN_DNS} == "yes" ]];then
-    AMF_IPV4_ADDRESS=${AMF_IPV4_ADDRESS:-0.0.0.0}
-    NRF_IPV4_ADDRESS=${NRF_IPV4_ADDRESS:-0.0.0.0}
-    UPF_IPV4_ADDRESS=${UPF_IPV4_ADDRESS:-0.0.0.0}
-    UDM_IPV4_ADDRESS=${UDM_IPV4_ADDRESS:-0.0.0.0}
-    PCF_IPV4_ADDRESS=${PCF_IPV4_ADDRESS:-0.0.0.0}
-fi
-
-DEFAULT_CSCF_IPV4_ADDRESS=${DEFAULT_CSCF_IPV4_ADDRESS:-127.0.0.1}
-
-HTTP_VERSION=${HTTP_VERSION:-1}
-
-DNN_NI0=${DNN_NI0:-oai.ipv4}
-TYPE0=${TYPE0:-IPv4}
-DNN_RANGE0=${DNN_RANGE0:-'12.1.1.2 - 12.1.1.128'}
-DNN_NI1=${DNN_NI1:-default}
-TYPE1=${TYPE1:-IPv4}
-DNN_RANGE1=${DNN_RANGE1:-'12.2.1.2 - 12.2.1.128'}
-DNN_NI2=${DNN_NI2:-oai}
-TYPE2=${TYPE2:-IPv4}
-DNN_RANGE2=${DNN_RANGE2:-'12.1.1.129 - 12.1.1.224'}
-DNN_NI3=${DNN_NI3:-ims}
-TYPE3=${TYPE3:-IPv4v6}
-DNN_RANGE3=${DNN_RANGE3:-'12.2.1.129 - 12.2.1.224'}
-
-for c in ${CONFIG_DIR}/*.conf; do
-    # grep variable names (format: ${VAR}) from template to be rendered
-    if ! grep -oP '@[a-zA-Z0-9_]+@' ${c}; then
-        echo "Configuration is already set"
-        exec "$@"
-    fi
-    VARS=$(grep -oP '@[a-zA-Z0-9_]+@' ${c} | sort | uniq | xargs)
-    echo "Now setting these variables '${VARS}'"
-
-    # create sed expressions for substituting each occurrence of ${VAR}
-    # with the value of the environment variable "VAR"
-    EXPRESSIONS=""
-    for v in ${VARS}; do
-        NEW_VAR=`echo $v | sed -e "s#@##g"`
-        if [[ -z ${!NEW_VAR+x} ]]; then
-            echo "Error: Environment variable '${NEW_VAR}' is not set." \
-                "Config file '$(basename $c)' requires all of $VARS."
-            exit 1
-        fi
-        EXPRESSIONS="${EXPRESSIONS};s|${v}|${!NEW_VAR}|g"
-    done
-    EXPRESSIONS="${EXPRESSIONS#';'}"
-
-    # render template and inline replace config file
-    sed -i "${EXPRESSIONS}" ${c}
-done
-echo "Done setting the configuration"
-exec "$@"