Upload 5 files

10-listen-on-ipv6-by-default.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+# vim:sw=4:ts=4:et
+
+set -e
+
+entrypoint_log() {
+    if [ -z "${NGINX_ENTRYPOINT_QUIET_LOGS:-}" ]; then
+        echo "$@"
+    fi
+}
+
+ME=$(basename "$0")
+DEFAULT_CONF_FILE="etc/nginx/conf.d/default.conf"
+
+# check if we have ipv6 available
+if [ ! -f "/proc/net/if_inet6" ]; then
+    entrypoint_log "$ME: info: ipv6 not available"
+    exit 0
+fi
+
+if [ ! -f "/$DEFAULT_CONF_FILE" ]; then
+    entrypoint_log "$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 || { entrypoint_log "$ME: info: can not modify /$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;" /$DEFAULT_CONF_FILE && { entrypoint_log "$ME: info: IPv6 listen already enabled"; exit 0; }
+
+if [ -f "/etc/os-release" ]; then
+    . /etc/os-release
+else
+    entrypoint_log "$ME: info: can not guess the operating system"
+    exit 0
+fi
+
+entrypoint_log "$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  /$DEFAULT_CONF_FILE" | md5sum -c - >/dev/null 2>&1 || {
+            entrypoint_log "$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  /$DEFAULT_CONF_FILE" | sha1sum -c - >/dev/null 2>&1 || {
+            entrypoint_log "$ME: info: /$DEFAULT_CONF_FILE differs from the packaged version"
+            exit 0
+        }
+        ;;
+    *)
+        entrypoint_log "$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;,' /$DEFAULT_CONF_FILE
+
+entrypoint_log "$ME: info: Enabled listen on IPv6 in /$DEFAULT_CONF_FILE"
+
+exit 0

15-local-resolvers.envsh

@@ -0,0 +1,12 @@
+#!/bin/sh
+# vim:sw=2:ts=2:sts=2:et
+
+set -eu
+
+LC_ALL=C
+PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+
+[ "${NGINX_ENTRYPOINT_LOCAL_RESOLVERS:-}" ] || return 0
+
+NGINX_LOCAL_RESOLVERS=$(awk 'BEGIN{ORS=" "} $1=="nameserver" {if ($2 ~ ":") {print "["$2"]"} else {print $2}}' /etc/resolv.conf)
+export NGINX_LOCAL_RESOLVERS

20-envsubst-on-templates.sh

@@ -0,0 +1,78 @@
+#!/bin/sh
+
+set -e
+
+ME=$(basename "$0")
+
+entrypoint_log() {
+  if [ -z "${NGINX_ENTRYPOINT_QUIET_LOGS:-}" ]; then
+    echo "$@"
+  fi
+}
+
+add_stream_block() {
+  local conffile="/etc/nginx/nginx.conf"
+
+  if grep -q -E "\s*stream\s*\{" "$conffile"; then
+    entrypoint_log "$ME: $conffile contains a stream block; include $stream_output_dir/*.conf to enable stream templates"
+  else
+    # check if the file can be modified, e.g. not on a r/o filesystem
+    touch "$conffile" 2>/dev/null || { entrypoint_log "$ME: info: can not modify $conffile (read-only file system?)"; exit 0; }
+    entrypoint_log "$ME: Appending stream block to $conffile to include $stream_output_dir/*.conf"
+    cat << END >> "$conffile"
+# added by "$ME" on "$(date)"
+stream {
+  include $stream_output_dir/*.conf;
+}
+END
+  fi
+}
+
+auto_envsubst() {
+  local template_dir="${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 stream_suffix="${NGINX_ENVSUBST_STREAM_TEMPLATE_SUFFIX:-.stream-template}"
+  local stream_output_dir="${NGINX_ENVSUBST_STREAM_OUTPUT_DIR:-/etc/nginx/stream-conf.d}"
+  local filter="${NGINX_ENVSUBST_FILTER:-}"
+
+  local template defined_envs relative_path output_path subdir
+  defined_envs=$(printf '${%s} ' $(awk "END { for (name in ENVIRON) { print ( name ~ /${filter}/ ) ? name : \"\" } }" < /dev/null ))
+  [ -d "$template_dir" ] || return 0
+  if [ ! -w "$output_dir" ]; then
+    entrypoint_log "$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"
+    entrypoint_log "$ME: Running envsubst on $template to $output_path"
+    envsubst "$defined_envs" < "$template" > "$output_path"
+  done
+
+  # Print the first file with the stream suffix, this will be false if there are none
+  if test -n "$(find "$template_dir" -name "*$stream_suffix" -print -quit)"; then
+    mkdir -p "$stream_output_dir"
+    if [ ! -w "$stream_output_dir" ]; then
+      entrypoint_log "$ME: ERROR: $template_dir exists, but $stream_output_dir is not writable"
+      return 0
+    fi
+    add_stream_block
+    find "$template_dir" -follow -type f -name "*$stream_suffix" -print | while read -r template; do
+      relative_path="${template#"$template_dir/"}"
+      output_path="$stream_output_dir/${relative_path%"$stream_suffix"}"
+      subdir=$(dirname "$relative_path")
+      # create a subdirectory where the template file exists
+      mkdir -p "$stream_output_dir/$subdir"
+      entrypoint_log "$ME: Running envsubst on $template to $output_path"
+      envsubst "$defined_envs" < "$template" > "$output_path"
+    done
+  fi
+}
+
+auto_envsubst
+
+exit 0

30-tune-worker-processes.sh

@@ -0,0 +1,188 @@
+#!/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

docker-entrypoint.sh

@@ -0,0 +1,47 @@
+#!/bin/sh
+# vim:sw=4:ts=4:et
+
+set -e
+
+entrypoint_log() {
+    if [ -z "${NGINX_ENTRYPOINT_QUIET_LOGS:-}" ]; then
+        echo "$@"
+    fi
+}
+
+if [ "$1" = "nginx" ] || [ "$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
+        entrypoint_log "$0: /docker-entrypoint.d/ is not empty, will attempt to perform configuration"
+
+        entrypoint_log "$0: Looking for shell scripts in /docker-entrypoint.d/"
+        find "/docker-entrypoint.d/" -follow -type f -print | sort -V | while read -r f; do
+            case "$f" in
+                *.envsh)
+                    if [ -x "$f" ]; then
+                        entrypoint_log "$0: Sourcing $f";
+                        . "$f"
+                    else
+                        # warn on shell scripts without exec bit
+                        entrypoint_log "$0: Ignoring $f, not executable";
+                    fi
+                    ;;
+                *.sh)
+                    if [ -x "$f" ]; then
+                        entrypoint_log "$0: Launching $f";
+                        "$f"
+                    else
+                        # warn on shell scripts without exec bit
+                        entrypoint_log "$0: Ignoring $f, not executable";
+                    fi
+                    ;;
+                *) entrypoint_log "$0: Ignoring $f";;
+            esac
+        done
+
+        entrypoint_log "$0: Configuration complete; ready for start up"
+    else
+        entrypoint_log "$0: No files found in /docker-entrypoint.d/, skipping configuration"
+    fi
+fi
+
+exec "$@"