nginx/1.21/Dockerfile

FROM harbor.dragse.it/base/alpine:3.15

LABEL maintainer="Lennard Brinkhaus <lennard.brinkhaus@dragse.de>"

ENV NGINX_VERSION 1.21.5
ENV NJS_VERSION   0.7.1
ENV PKG_RELEASE   1

RUN echo $'http://nexus.dragse.it/repository/apk-main/\nhttp://nexus.dragse.it/repository/apk-community/' > /etc/apk/repositories

RUN   apk --no-cache upgrade \
  &&   apk --no-cache add ca-certificates wget openssl \
  &&   update-ca-certificates

ARG UID=101
ARG GID=101

RUN set -x \
# create nginx user/group first, to be consistent throughout docker variants
    && addgroup -g $GID -S nginx || true \
    && adduser -S -D -H -u $UID -h /var/cache/nginx -s /sbin/nologin -G nginx -g nginx nginx || true \
    && apkArch="$(cat /etc/apk/arch)" \
    && nginxPackages=" \
        nginx=${NGINX_VERSION}-r${PKG_RELEASE} \
        nginx-module-xslt=${NGINX_VERSION}-r${PKG_RELEASE} \
        nginx-module-geoip=${NGINX_VERSION}-r${PKG_RELEASE} \
        nginx-module-image-filter=${NGINX_VERSION}-r${PKG_RELEASE} \
        nginx-module-perl=${NGINX_VERSION}-r${PKG_RELEASE} \
        nginx-module-njs=${NGINX_VERSION}.${NJS_VERSION}-r${PKG_RELEASE} \
    " \
# install prerequisites for public key and pkg-oss checks
    && apk add --no-cache --virtual .checksum-deps \
        openssl \
    && case "$apkArch" in \
        x86_64|aarch64) \
# arches officially built by upstream
            set -x \
            && KEY_SHA512="e7fa8303923d9b95db37a77ad46c68fd4755ff935d0a534d26eba83de193c76166c68bfe7f65471bf8881004ef4aa6df3e34689c305662750c0172fca5d8552a *stdin" \
            && wget -O /tmp/nginx_signing.rsa.pub https://nginx.org/keys/nginx_signing.rsa.pub \
            && if [ "$(openssl rsa -pubin -in /tmp/nginx_signing.rsa.pub -text -noout | openssl sha512 -r)" = "$KEY_SHA512" ]; then \
                echo "key verification succeeded!"; \
                mv /tmp/nginx_signing.rsa.pub /etc/apk/keys/; \
            else \
                echo "key verification failed!"; \
                exit 1; \
            fi \
            && apk add -X "https://nginx.org/packages/mainline/alpine/v$(egrep -o '^[0-9]+\.[0-9]+' /etc/alpine-release)/main" --no-cache $nginxPackages \
            ;; \
        *) \
# we're on an architecture upstream doesn't officially build for
# let's build binaries from the published packaging sources
            set -x \
            && tempDir="$(mktemp -d)" \
            && chown nobody:nobody $tempDir \
            && apk add --no-cache --virtual .build-deps \
                gcc \
                libc-dev \
                make \
                openssl-dev \
                pcre-dev \
                zlib-dev \
                linux-headers \
                libxslt-dev \
                gd-dev \
                geoip-dev \
                perl-dev \
                libedit-dev \
                bash \
                alpine-sdk \
                findutils \
            && su nobody -s /bin/sh -c " \
                export HOME=${tempDir} \
                && cd ${tempDir} \
                && curl -f -O https://hg.nginx.org/pkg-oss/archive/${NGINX_VERSION}-${PKG_RELEASE}.tar.gz \
                && PKGOSSCHECKSUM=\"f917c27702aa89cda46878fc80d446839c592c43ce7f251b3f4ced60c7033d34496a92d283927225d458cbc4f2f89499e7fb16344923317cd7725ad722eaf93e *${NGINX_VERSION}-${PKG_RELEASE}.tar.gz\" \
                && if [ \"\$(openssl sha512 -r ${NGINX_VERSION}-${PKG_RELEASE}.tar.gz)\" = \"\$PKGOSSCHECKSUM\" ]; then \
                    echo \"pkg-oss tarball checksum verification succeeded!\"; \
                else \
                    echo \"pkg-oss tarball checksum verification failed!\"; \
                    exit 1; \
                fi \
                && tar xzvf ${NGINX_VERSION}-${PKG_RELEASE}.tar.gz \
                && cd pkg-oss-${NGINX_VERSION}-${PKG_RELEASE} \
                && cd alpine \
                && make all \
                && apk index -o ${tempDir}/packages/alpine/${apkArch}/APKINDEX.tar.gz ${tempDir}/packages/alpine/${apkArch}/*.apk \
                && abuild-sign -k ${tempDir}/.abuild/abuild-key.rsa ${tempDir}/packages/alpine/${apkArch}/APKINDEX.tar.gz \
                " \
            && cp ${tempDir}/.abuild/abuild-key.rsa.pub /etc/apk/keys/ \
            && apk del .build-deps \
            && apk add -X ${tempDir}/packages/alpine/ --no-cache $nginxPackages \
            ;; \
    esac \
# remove checksum deps
    && apk del .checksum-deps \
# if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
    && if [ -n "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
    && if [ -n "/etc/apk/keys/nginx_signing.rsa.pub" ]; then rm -f /etc/apk/keys/nginx_signing.rsa.pub; fi \
# Bring in gettext so we can get `envsubst`, then throw
# the rest away. To do this, we need to install `gettext`
# then move `envsubst` out of the way so `gettext` can
# be deleted completely, then move `envsubst` back.
    && apk add --no-cache --virtual .gettext gettext \
    && mv /usr/bin/envsubst /tmp/ \
    \
    && runDeps="$( \
        scanelf --needed --nobanner /tmp/envsubst \
            | awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
            | sort -u \
            | xargs -r apk info --installed \
            | sort -u \
    )" \
    && apk add --no-cache $runDeps \
    && apk del .gettext \
    && mv /tmp/envsubst /usr/local/bin/ \
# Bring in tzdata so users could set the timezones through the environment
# variables
    && apk add --no-cache tzdata \
# Bring in curl and ca-certificates to make registering on DNS SD easier
    && apk add --no-cache curl ca-certificates \
# forward request and error logs to docker log collector
    && ln -sf /dev/stdout /var/log/nginx/access.log \
    && ln -sf /dev/stderr /var/log/nginx/error.log \
# create a docker-entrypoint.d directory
    && mkdir /docker-entrypoint.d

# implement changes required to run NGINX as an unprivileged user
RUN sed -i 's,listen       80;,listen       8080;,' /etc/nginx/conf.d/default.conf \
    && sed -i '/user  nginx;/d' /etc/nginx/nginx.conf \
    && sed -i 's,/var/run/nginx.pid,/tmp/nginx.pid,' /etc/nginx/nginx.conf \
    && sed -i "/^http {/a \    proxy_temp_path /tmp/proxy_temp;\n    client_body_temp_path /tmp/client_temp;\n    fastcgi_temp_path /tmp/fastcgi_temp;\n    uwsgi_temp_path /tmp/uwsgi_temp;\n    scgi_temp_path /tmp/scgi_temp;\n" /etc/nginx/nginx.conf \
# nginx user must own the cache and etc directory to write cache and tweak the nginx config
    && chown -R $UID:0 /var/cache/nginx \
    && chmod -R g+w /var/cache/nginx \
    && chown -R $UID:0 /etc/nginx \
    && chmod -R g+w /etc/nginx

USER $UID

COPY docker-entrypoint.sh /docker-entrypoint.sh
COPY 10-listen-on-ipv6-by-default.sh /docker-entrypoint.d
COPY 20-envsubst-on-templates.sh /docker-entrypoint.d
COPY 30-tune-worker-processes.sh /docker-entrypoint.d
ENTRYPOINT ["/docker-entrypoint.sh"]

EXPOSE 8080

STOPSIGNAL SIGQUIT

CMD ["nginx", "-g", "daemon off;"]