fix: switch promtails base image from debian to ubuntu (backport release-2.9.x) (#15210)

Author: cstyan

clients/cmd/promtail/Dockerfile

@@ -7,16 +7,13 @@ RUN echo "deb http://deb.debian.org/debian bullseye-backports main" >> /etc/apt/
 RUN apt-get update && apt-get install -t bullseye-backports -qy libsystemd-dev
 RUN make clean && make BUILD_IN_CONTAINER=false PROMTAIL_JOURNAL_ENABLED=true promtail
 
-# Promtail requires debian as the base image to support systemd journal reading
-FROM debian:bullseye-slim
+# Promtail requires debian or ubuntu as the base image to support systemd journal reading
+FROM public.ecr.aws/ubuntu/ubuntu:noble
 # tzdata required for the timestamp stage to work
-# Backports repo required to get a libsystemd version 246 or newer which is required to handle journal +ZSTD compression
-RUN echo "deb http://deb.debian.org/debian bullseye-backports main" >> /etc/apt/sources.list
-RUN apt-get update && \
-  apt-get install -qy \
-  tzdata ca-certificates
-RUN apt-get install -t bullseye-backports -qy libsystemd-dev && \
-  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+# Install dependencies needed at runtime.
+RUN  apt-get update \
+ &&  apt-get install -qy libsystemd-dev tzdata ca-certificates \
+ &&  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 COPY --from=build /src/loki/clients/cmd/promtail/promtail /usr/bin/promtail
 COPY clients/cmd/promtail/promtail-docker-config.yaml /etc/promtail/config.yml
 ENTRYPOINT ["/usr/bin/promtail"]

clients/cmd/promtail/Dockerfile.arm32

@@ -7,8 +7,8 @@ RUN echo "deb http://deb.debian.org/debian bullseye-backports main" >> /etc/apt/
 RUN apt-get update && apt-get install -t bullseye-backports -qy libsystemd-dev
 RUN make clean && make BUILD_IN_CONTAINER=false PROMTAIL_JOURNAL_ENABLED=true promtail
 
-# Promtail requires debian as the base image to support systemd journal reading
-FROM debian:bullseye-slim
+# Promtail requires debian or ubuntu as the base image to support systemd journal reading
+FROM public.ecr.aws/ubuntu/ubuntu:noble
 # tzdata required for the timestamp stage to work
 # Backports repo required to get a libsystemd version 246 or newer which is required to handle journal +ZSTD compression
 RUN echo "deb http://deb.debian.org/debian bullseye-backports main" >> /etc/apt/sources.list

clients/cmd/promtail/Dockerfile.cross

@@ -12,8 +12,8 @@ COPY . /src/loki
 WORKDIR /src/loki
 RUN make clean && GOARCH=$(cat /goarch) GOARM=$(cat /goarm) make BUILD_IN_CONTAINER=false PROMTAIL_JOURNAL_ENABLED=true promtail
 
-# Promtail requires debian as the base image to support systemd journal reading
-FROM debian:stretch-slim
+# Promtail requires debian or ubuntu as the base image to support systemd journal reading
+FROM public.ecr.aws/ubuntu/ubuntu:noble
 # tzdata required for the timestamp stage to work
 RUN apt-get update && \
   apt-get install -qy \