[docker] adding entrypoint and template generation to dockerfile for u18

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

docker/Dockerfile.eNB.ubuntu18

@@ -35,6 +35,10 @@ RUN /bin/sh oaienv && \
     mkdir -p log && \
     ./build_oai --eNB --ninja -w USRP
 
+RUN apt-get install -y python3-pip && \
+    pip3 install --ignore-installed pyyaml && \
+    python3 ./docker/scripts/generateTemplate.py ./docker/scripts/parameters.yaml
+
 # debug
 #RUN ldconfig -v && ldd /oai-ran/targets/bin/lte-softmodem.Rel15
 #RUN ls -ls /oai-ran/targets/bin
@@ -73,6 +77,7 @@ RUN apt-get update && \
 
 WORKDIR /opt/oai-enb/bin
 COPY --from=enb-build /oai-ran/targets/bin/lte-softmodem.Rel15 .
+COPY --from=enb-build /oai-ran/docker/scripts/enb_entrypoint.sh entrypoint.sh
 
 WORKDIR /usr/local/lib/
 COPY --from=enb-build /oai-ran/targets/bin/liboai_eth_transpro.so.Rel15 .
@@ -104,21 +109,16 @@ RUN ldconfig
 
 # Copy the relevant configuration files for eNB
 WORKDIR /opt/oai-enb/etc
-COPY --from=enb-build /oai-ran/ci-scripts/conf_files/enb.* ./
-COPY --from=enb-build /oai-ran/ci-scripts/conf_files/rcc.* ./
-COPY --from=enb-build /oai-ran/ci-scripts/conf_files/cu.* ./
-COPY --from=enb-build /oai-ran/ci-scripts/conf_files/du.* ./
-COPY --from=enb-build /oai-ran/ci-scripts/conf_files/rru.* ./
+COPY --from=enb-build /oai-ran/docker/etc .
 
 WORKDIR /opt/oai-enb
 
-#EXPOSE 2152/udp  # S1U, GTP/UDP
+EXPOSE 2152/udp  # S1U, GTP/UDP
+EXPOSE 36412/udp # S1C, SCTP/UDP
+EXPOSE 36422/udp # X2C, SCTP/UDP
 #EXPOSE 22100/tcp # ?
-#EXPOSE 36412/udp # S1C, SCTP/UDP
-#EXPOSE 36422/udp # X2C, SCTP/UDP
 #EXPOSE 50000/udp # IF5 / ORI (control)
 #EXPOSE 50001/udp # IF5 / ECPRI (data)
 
-#CMD ["/opt/oai-enb/bin/lte-softmodem", "-O", "/opt/oai-enb/etc/enb.conf"]
-#ENTRYPOINT ["/opt/oai-enb/bin/entrypoint.sh"]
-CMD ["sleep", "infinity"]
+ENTRYPOINT ["/opt/oai-enb/bin/entrypoint.sh"]
+CMD ["/opt/oai-enb/bin/lte-softmodem.Rel15", "-O", "/opt/oai-enb/etc/enb.conf"]

docker/scripts/enb_entrypoint.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# Based another env var
+if [[ -v USE_FDD_CU ]]; then ln -s /opt/oai-enb/etc/cu.fdd.conf /opt/oai-enb/etc/enb.conf; fi
+if [[ -v USE_FDD_DU ]]; then ln -s /opt/oai-enb/etc/du.fdd.conf /opt/oai-enb/etc/enb.conf; fi
+if [[ -v USE_FDD_MONO ]]; then ln -s /opt/oai-enb/etc/enb.fdd.conf /opt/oai-enb/etc/enb.conf; fi
+if [[ -v USE_TDD_MONO ]]; then ln -s /opt/oai-enb/etc/enb.tdd.conf /opt/oai-enb/etc/enb.conf; fi
+if [[ -v USE_FDD_RCC ]]; then ln -s /opt/oai-enb/etc/rcc.if4p5.enb.fdd.conf /opt/oai-enb/etc/enb.conf; fi
+if [[ -v USE_FDD_RRU ]]; then ln -s /opt/oai-enb/etc/rru.fdd.conf /opt/oai-enb/etc/enb.conf; fi
+if [[ -v USE_TDD_RRU ]]; then ln -s /opt/oai-enb/etc/rru.tdd.conf /opt/oai-enb/etc/enb.conf; fi
+
+CONFIG_FILES=`ls /opt/oai-enb/etc/enb.conf`
+
+for c in ${CONFIG_FILES}; do
+    # grep variable names (format: ${VAR}) from template to be rendered
+    VARS=$(grep -oP '@[a-zA-Z0-9_]+@' ${c} | sort | uniq | xargs)
+
+    # 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 $v | sed -e "s#@##g"`
+        if [[ "${!NEW_VAR}x" == "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}" ${c}
+done
+
+# Later-on, how to add command lines options?
+
+# Load the USRP binaries
+# --> later conditional (when doing simulators)
+/usr/lib/uhd/utils/uhd_images_downloader.py
+
+exec "$@"