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Create Docker-Image for Nginx 1.21 with pearl

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This commit is contained in:
Lennard Brinkhaus 2022-01-10 14:55:32 +01:00
parent b5da1f86cd
commit bebe3fb654
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5 changed files with 470 additions and 0 deletions
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61
1.21/10-listen-on-ipv6-by-default.sh Normal file
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#!/bin/sh
# vim:sw=4:ts=4:et
set -e
ME=$(basename $0)
DEFAULT_CONF_FILE="etc/nginx/conf.d/default.conf"
# check if we have ipv6 available
if [ ! -f "/proc/net/if_inet6" ]; then
echo >&3 "$ME: info: ipv6 not available"
exit 0
fi
if [ ! -f "/$DEFAULT_CONF_FILE" ]; then
echo >&3 "$ME: info: /$DEFAULT_CONF_FILE is not a file or does not exist"
exit 0
fi
# check if the file can be modified, e.g. not on a r/o filesystem
touch /$DEFAULT_CONF_FILE 2>/dev/null || { echo >&3 "$ME: info: can not modify /$DEFAULT_CONF_FILE (read-only file system?)"; exit 0; }
# check if the file is already modified, e.g. on a container restart
grep -q "listen \[::]\:8080;" /$DEFAULT_CONF_FILE && { echo >&3 "$ME: info: IPv6 listen already enabled"; exit 0; }
if [ -f "/etc/os-release" ]; then
. /etc/os-release
else
echo >&3 "$ME: info: can not guess the operating system"
exit 0
fi
echo >&3 "$ME: info: Getting the checksum of /$DEFAULT_CONF_FILE"
case "$ID" in
"debian")
CHECKSUM=$(dpkg-query --show --showformat='${Conffiles}\n' nginx | grep $DEFAULT_CONF_FILE | cut -d' ' -f 3)
echo "$CHECKSUM /$DEFAULT_CONF_FILE" | md5sum -c - >/dev/null 2>&1 || {
echo >&3 "$ME: info: /$DEFAULT_CONF_FILE differs from the packaged version"
exit 0
}
;;
"alpine")
CHECKSUM=$(apk manifest nginx 2>/dev/null| grep $DEFAULT_CONF_FILE | cut -d' ' -f 1 | cut -d ':' -f 2)
echo "$CHECKSUM /$DEFAULT_CONF_FILE" | sha1sum -c - >/dev/null 2>&1 || {
echo >&3 "$ME: info: /$DEFAULT_CONF_FILE differs from the packaged version"
exit 0
}
;;
*)
echo >&3 "$ME: info: Unsupported distribution"
exit 0
;;
esac
# enable ipv6 on default.conf listen sockets
sed -i -E 's,listen 8080;,listen 8080;\n listen [::]:8080;,' /$DEFAULT_CONF_FILE
echo >&3 "$ME: info: Enabled listen on IPv6 in /$DEFAULT_CONF_FILE"
exit 0

32
1.21/20-envsubst-on-templates.sh Normal file
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#!/bin/sh
set -e
ME=$(basename $0)
auto_envsubst() {
local template_dir="${NGINX_ENVSUBST_TEMPLATE_DIR:-/etc/nginx/templates}"
local suffix="${NGINX_ENVSUBST_TEMPLATE_SUFFIX:-.template}"
local output_dir="${NGINX_ENVSUBST_OUTPUT_DIR:-/etc/nginx/conf.d}"
local template defined_envs relative_path output_path subdir
defined_envs=$(printf '${%s} ' $(env | cut -d= -f1))
[ -d "$template_dir" ] || return 0
if [ ! -w "$output_dir" ]; then
echo >&3 "$ME: ERROR: $template_dir exists, but $output_dir is not writable"
return 0
fi
find "$template_dir" -follow -type f -name "*$suffix" -print | while read -r template; do
relative_path="${template#$template_dir/}"
output_path="$output_dir/${relative_path%$suffix}"
subdir=$(dirname "$relative_path")
# create a subdirectory where the template file exists
mkdir -p "$output_dir/$subdir"
echo >&3 "$ME: Running envsubst on $template to $output_path"
envsubst "$defined_envs" < "$template" > "$output_path"
done
}
auto_envsubst
exit 0

188
1.21/30-tune-worker-processes.sh Normal file
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#!/bin/sh
# vim:sw=2:ts=2:sts=2:et
set -eu
LC_ALL=C
ME=$( basename "$0" )
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
[ "${NGINX_ENTRYPOINT_WORKER_PROCESSES_AUTOTUNE:-}" ] || exit 0
touch /etc/nginx/nginx.conf 2>/dev/null || { echo >&2 "$ME: error: can not modify /etc/nginx/nginx.conf (read-only file system?)"; exit 0; }
ceildiv() {
num=$1
div=$2
echo $(( (num + div - 1) / div ))
}
get_cpuset() {
cpusetroot=$1
cpusetfile=$2
ncpu=0
[ -f "$cpusetroot/$cpusetfile" ] || return 1
for token in $( tr ',' ' ' < "$cpusetroot/$cpusetfile" ); do
case "$token" in
*-*)
count=$( seq $(echo "$token" | tr '-' ' ') | wc -l )
ncpu=$(( ncpu+count ))
;;
*)
ncpu=$(( ncpu+1 ))
;;
esac
done
echo "$ncpu"
}
get_quota() {
cpuroot=$1
ncpu=0
[ -f "$cpuroot/cpu.cfs_quota_us" ] || return 1
[ -f "$cpuroot/cpu.cfs_period_us" ] || return 1
cfs_quota=$( cat "$cpuroot/cpu.cfs_quota_us" )
cfs_period=$( cat "$cpuroot/cpu.cfs_period_us" )
[ "$cfs_quota" = "-1" ] && return 1
[ "$cfs_period" = "0" ] && return 1
ncpu=$( ceildiv "$cfs_quota" "$cfs_period" )
[ "$ncpu" -gt 0 ] || return 1
echo "$ncpu"
}
get_quota_v2() {
cpuroot=$1
ncpu=0
[ -f "$cpuroot/cpu.max" ] || return 1
cfs_quota=$( cut -d' ' -f 1 < "$cpuroot/cpu.max" )
cfs_period=$( cut -d' ' -f 2 < "$cpuroot/cpu.max" )
[ "$cfs_quota" = "max" ] && return 1
[ "$cfs_period" = "0" ] && return 1
ncpu=$( ceildiv "$cfs_quota" "$cfs_period" )
[ "$ncpu" -gt 0 ] || return 1
echo "$ncpu"
}
get_cgroup_v1_path() {
needle=$1
found=
foundroot=
mountpoint=
[ -r "/proc/self/mountinfo" ] || return 1
[ -r "/proc/self/cgroup" ] || return 1
while IFS= read -r line; do
case "$needle" in
"cpuset")
case "$line" in
*cpuset*)
found=$( echo "$line" | cut -d ' ' -f 4,5 )
break
;;
esac
;;
"cpu")
case "$line" in
*cpuset*)
;;
*cpu,cpuacct*|*cpuacct,cpu|*cpuacct*|*cpu*)
found=$( echo "$line" | cut -d ' ' -f 4,5 )
break
;;
esac
esac
done << __EOF__
$( grep -F -- '- cgroup ' /proc/self/mountinfo )
__EOF__
while IFS= read -r line; do
controller=$( echo "$line" | cut -d: -f 2 )
case "$needle" in
"cpuset")
case "$controller" in
cpuset)
mountpoint=$( echo "$line" | cut -d: -f 3 )
break
;;
esac
;;
"cpu")
case "$controller" in
cpu,cpuacct|cpuacct,cpu|cpuacct|cpu)
mountpoint=$( echo "$line" | cut -d: -f 3 )
break
;;
esac
;;
esac
done << __EOF__
$( grep -F -- 'cpu' /proc/self/cgroup )
__EOF__
case "${found%% *}" in
"/")
foundroot="${found##* }$mountpoint"
;;
"$mountpoint")
foundroot="${found##* }"
;;
esac
echo "$foundroot"
}
get_cgroup_v2_path() {
found=
foundroot=
mountpoint=
[ -r "/proc/self/mountinfo" ] || return 1
[ -r "/proc/self/cgroup" ] || return 1
while IFS= read -r line; do
found=$( echo "$line" | cut -d ' ' -f 4,5 )
done << __EOF__
$( grep -F -- '- cgroup2 ' /proc/self/mountinfo )
__EOF__
while IFS= read -r line; do
mountpoint=$( echo "$line" | cut -d: -f 3 )
done << __EOF__
$( grep -F -- '0::' /proc/self/cgroup )
__EOF__
case "${found%% *}" in
"")
return 1
;;
"/")
foundroot="${found##* }$mountpoint"
;;
"$mountpoint")
foundroot="${found##* }"
;;
esac
echo "$foundroot"
}
ncpu_online=$( getconf _NPROCESSORS_ONLN )
ncpu_cpuset=
ncpu_quota=
ncpu_cpuset_v2=
ncpu_quota_v2=
cpuset=$( get_cgroup_v1_path "cpuset" ) && ncpu_cpuset=$( get_cpuset "$cpuset" "cpuset.effective_cpus" ) || ncpu_cpuset=$ncpu_online
cpu=$( get_cgroup_v1_path "cpu" ) && ncpu_quota=$( get_quota "$cpu" ) || ncpu_quota=$ncpu_online
cgroup_v2=$( get_cgroup_v2_path ) && ncpu_cpuset_v2=$( get_cpuset "$cgroup_v2" "cpuset.cpus.effective" ) || ncpu_cpuset_v2=$ncpu_online
cgroup_v2=$( get_cgroup_v2_path ) && ncpu_quota_v2=$( get_quota_v2 "$cgroup_v2" ) || ncpu_quota_v2=$ncpu_online
ncpu=$( printf "%s\n%s\n%s\n%s\n%s\n" \
"$ncpu_online" \
"$ncpu_cpuset" \
"$ncpu_quota" \
"$ncpu_cpuset_v2" \
"$ncpu_quota_v2" \
| sort -n \
| head -n 1 )
sed -i.bak -r 's/^(worker_processes)(.*)$/# Commented out by '"$ME"' on '"$(date)"'\n#\1\2\n\1 '"$ncpu"';/' /etc/nginx/nginx.conf

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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
COPY 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
USER $UID
CMD ["nginx", "-g", "daemon off;"]

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#!/bin/sh
# vim:sw=4:ts=4:et
set -e
if [ -z "${NGINX_ENTRYPOINT_QUIET_LOGS:-}" ]; then
exec 3>&1
else
exec 3>/dev/null
fi
if [ "$1" = "nginx" -o "$1" = "nginx-debug" ]; then
if /usr/bin/find "/docker-entrypoint.d/" -mindepth 1 -maxdepth 1 -type f -print -quit 2>/dev/null | read v; then
echo >&3 "$0: /docker-entrypoint.d/ is not empty, will attempt to perform configuration"
echo >&3 "$0: Looking for shell scripts in /docker-entrypoint.d/"
find "/docker-entrypoint.d/" -follow -type f -print | sort -V | while read -r f; do
case "$f" in
*.sh)
if [ -x "$f" ]; then
echo >&3 "$0: Launching $f";
"$f"
else
# warn on shell scripts without exec bit
echo >&3 "$0: Ignoring $f, not executable";
fi
;;
*) echo >&3 "$0: Ignoring $f";;
esac
done
echo >&3 "$0: Configuration complete; ready for start up"
else
echo >&3 "$0: No files found in /docker-entrypoint.d/, skipping configuration"
fi
fi
exec "$@"