support for cgroup2 / ubuntu22: IS_CONTAINER is derived from IS_DOCKERBUILD...

support for cgroup2 / ubuntu22: IS_CONTAINER is derived from IS_DOCKERBUILD which is declared in Dockerfile

build/scripts/build_helper

@@ -40,12 +40,14 @@ case "$OS_DISTRO" in
 esac
 
 IS_CONTAINER=`egrep -c "docker|kubepods|podman|buildah|libpod" /proc/self/cgroup || true`
+IS_DOCKERBUILD=${IS_DOCKERFILE:-0}
 
-if [ $IS_CONTAINER -eq 0 ]
+if [ $IS_CONTAINER -eq 0 ] && [ $IS_DOCKERBUILD -eq 0 ]
 then
   SUDO='sudo -S -E'
 else
   SUDO=''
+  IS_CONTAINER=1
 fi
 
 ###############################
@@ -318,5 +320,3 @@ set_openair_env(){
   openair_path=${openair_path%/src/s6a/*}
   export OPENAIRCN_DIR=$openair_path
 }
-
-

docker/Dockerfile.smf.rhel8

@@ -30,6 +30,8 @@
 #---------------------------------------------------------------------
 FROM registry.access.redhat.com/ubi8/ubi:latest AS oai-smf-builder
 
+ENV IS_DOCKERFILE=1
+
 # Copy the entitlements
 COPY ./etc-pki-entitlement /etc/pki/entitlement
 

docker/Dockerfile.smf.ubuntu

@@ -35,6 +35,7 @@ FROM $BASE_IMAGE as oai-smf-base
 
 ENV DEBIAN_FRONTEND=noninteractive
 ENV TZ=Europe/Paris
+ENV IS_DOCKERFILE=1
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get upgrade --yes && \
     DEBIAN_FRONTEND=noninteractive apt-get install --yes \