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Use UBI 8 minimal to reduce image size #1575

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May 11, 2021
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Use UBI 8 minimal to reduce image size #1575

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9 changes: 5 additions & 4 deletions build/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -104,14 +104,15 @@ COPY --chown=nginx:0 build/log-default.json /etc/nginx


############################################# Base image for UBI #############################################
FROM registry.access.redhat.com/ubi8/ubi:8.3 AS ubi-base
FROM registry.access.redhat.com/ubi8-minimal AS ubi-base

LABEL name="NGINX Ingress Controller" \
description="The Ingress controller is an application that runs in a cluster and configures an HTTP load balancer according to Ingress resources." \
summary="The Ingress controller is an application that runs in a cluster and configures an HTTP load balancer according to Ingress resources." \
io.openshift.tags="nginx,ingress-controller,ingress,controller,kubernetes,openshift"

RUN set -x \
&& microdnf --nodocs --enablerepo=ubi-8-baseos install -y shadow-utils \
&& groupadd --system --gid 101 nginx \
&& useradd --system --gid nginx --no-create-home --home-dir /nonexistent --comment "nginx user" --shell /bin/false --uid 101 nginx

Expand All @@ -131,14 +132,14 @@ RUN rpm --import https://nginx.org/keys/nginx_signing.key \
&& echo "gpgcheck=1" >> /etc/yum.repos.d/nginx.repo \
&& echo "enabled=1" >> /etc/yum.repos.d/nginx.repo \
&& echo "module_hotfixes=true" >> /etc/yum.repos.d/nginx.repo \
&& yum install -y nginx-${NGINX_VERSION} \
&& microdnf --setopt=install_weak_deps=0 --nodocs install -y nginx-${NGINX_VERSION} \
&& rm /etc/yum.repos.d/nginx.repo


############################################# Base image for UBI with NGINX Plus #############################################
FROM ubi-base AS ubi-plus

ENV NGINX_PLUS_VERSION 23-1.el8.ngx
ENV NGINX_PLUS_VERSION r23

RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/ssl/nginx/nginx-repo.crt,mode=0644 \
--mount=type=secret,id=nginx-repo.key,dst=/etc/ssl/nginx/nginx-repo.key,mode=0644 \
Expand All @@ -150,7 +151,7 @@ RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/ssl/nginx/nginx-repo.crt,mode
&& echo "sslclientkey=/etc/ssl/nginx/nginx-repo.key" >> /etc/yum.repos.d/nginx-plus-8.repo \
&& echo "gpgcheck=1" >> /etc/yum.repos.d/nginx-plus-8.repo \
&& echo "enabled=1" >> /etc/yum.repos.d/nginx-plus-8.repo \
&& yum install -y ca-certificates nginx-plus-${NGINX_PLUS_VERSION} \
&& microdnf --setopt=install_weak_deps=0 --nodocs install -y nginx-plus-${NGINX_PLUS_VERSION} nginx-plus-module-njs-${NGINX_PLUS_VERSION} \
&& rm /etc/yum.repos.d/nginx-plus-8.repo

COPY --chown=nginx:0 internal/configs/oidc/* /etc/nginx/oidc/
Expand Down