Dockerfile-alpine-slim.template

FROM alpine:%%ALPINE_VERSION%%

LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"

ENV NGINX_VERSION  %%NGINX_VERSION%%
ENV PKG_RELEASE    %%PKG_RELEASE%%
ENV DYNPKG_RELEASE %%DYNPKG_RELEASE%%

RUN set -x \
# create nginx user/group first, to be consistent throughout docker variants
    && addgroup -g 101 -S nginx \
    && adduser -S -D -H -u 101 -h /var/cache/nginx -s /sbin/nologin -G nginx -g nginx nginx \
    && apkArch="$(cat /etc/apk/arch)" \
    && nginxPackages="%%PACKAGES%%
    " \
# install prerequisites for public key and pkg-oss checks
    && apk add --no-cache --virtual .checksum-deps \
        openssl \
    && case "$apkArch" in \
        x86_64|aarch64) \
# arches officially built by upstream
            set -x \
            && KEY_SHA512="e09fa32f0a0eab2b879ccbbc4d0e4fb9751486eedda75e35fac65802cc9faa266425edf83e261137a2f4d16281ce2c1a5f4502930fe75154723da014214f0655" \
            && wget -O /tmp/nginx_signing.rsa.pub https://nginx.org/keys/nginx_signing.rsa.pub \
            && if echo "$KEY_SHA512 */tmp/nginx_signing.rsa.pub" | sha512sum -c -; then \
                echo "key verification succeeded!"; \
                mv /tmp/nginx_signing.rsa.pub /etc/apk/keys/; \
            else \
                echo "key verification failed!"; \
                exit 1; \
            fi \
# we need to make sure nginx.org packages are pulled in, which isnt guaranteed
# as Alpine repos might have the same version in the repos.
# query nginx.org binaries for the dependencies
            && DEPS=$(apk query --summarize depends --recursive --no-cache \
                       --repository "@nginxorg %%PACKAGEREPO%%v$(egrep -o '^[0-9]+\.[0-9]+' /etc/alpine-release)/main" \
                       ${nginxPackages/=/@nginxorg=}) \
# install those dependencies from Alpine repos
            && apk add --no-cache $DEPS \
# limit apk to nginx.org repos only to install the requested packages
            && apk add --repositories-file /dev/null -X "%%PACKAGEREPO%%v$(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 $tempDir \
            && apk add --no-cache --virtual .build-deps \
                gcc \
                libc-dev \
                make \
                openssl-dev \
                pcre2-dev \
                zlib-dev \
                linux-headers \
                bash \
                alpine-sdk \
                findutils \
                curl \
            && su nobody -s /bin/sh -c " \
                export HOME=${tempDir} \
                && cd ${tempDir} \
                && curl -f -L -O https://github.com/nginx/pkg-oss/archive/%%REVISION%%.tar.gz \
                && PKGOSSCHECKSUM=\"%%PKGOSSCHECKSUM%% *%%REVISION%%.tar.gz\" \
                && if [ \"\$(openssl sha512 -r %%REVISION%%.tar.gz)\" = \"\$PKGOSSCHECKSUM\" ]; then \
                    echo \"pkg-oss tarball checksum verification succeeded!\"; \
                else \
                    echo \"pkg-oss tarball checksum verification failed!\"; \
                    exit 1; \
                fi \
                && tar xzvf %%REVISION%%.tar.gz \
                && cd pkg-oss-%%REVISION%% \
                && cd alpine \
                && make %%BUILDTARGET%% \
                && apk index --allow-untrusted -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 ${tempDir}/.abuild/abuild-key.rsa.pub /etc/apk/keys/ \
            && apk del --no-network .build-deps \
# same as in the "arches officially built by upstream" block, we want to make
# sure the packages we've just built will get installed
            && DEPS=$(apk query --summarize depends --recursive --no-cache \
                       --repository "@nginxorg ${tempDir}/packages/alpine/" \
                       ${nginxPackages/=/@nginxorg=}) \
            && apk add --no-cache $DEPS \
            && apk add --repositories-file /dev/null -X ${tempDir}/packages/alpine/ --no-cache $nginxPackages \
            ;; \
    esac \
# remove checksum deps
    && apk del --no-network .checksum-deps \
# if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
    && if [ -n "$tempDir" ]; then rm -rf "$tempDir"; fi \
    && if [ -f "/etc/apk/keys/abuild-key.rsa.pub" ]; then rm -f /etc/apk/keys/abuild-key.rsa.pub; fi \
# Add `envsubst` for templating environment variables
    && apk add --no-cache gettext-envsubst \
# Bring in tzdata so users could set the timezones through the environment
# variables
    && apk add --no-cache tzdata \
# 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

COPY docker-entrypoint.sh /
COPY 10-listen-on-ipv6-by-default.sh /docker-entrypoint.d
COPY 15-local-resolvers.envsh /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 80

STOPSIGNAL SIGQUIT

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