Switched the image from supervisord to s6-overlay because it provides a much smaller memory footprint.

s6-overlay vs supervisord — Memory Footprint Comparison

s6-overlay:
Uses only 1–2 MB of RAM. Its service processes typically consume around 200 KB RSS each.
Extremely lightweight, written in C, minimal overhead.

supervisord:
Consumes roughly 10–15 MB of RAM in real-world usage.
Implemented in Python, so it naturally has a higher baseline memory footprint (≈8–10× s6-overlay).
This commit is contained in:
fscarmen
2025-11-16 01:38:44 +00:00
parent 4713fc4cca
commit 8ebd2d54f6
3 changed files with 76 additions and 48 deletions
+26 -3
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@@ -1,4 +1,24 @@
# 使用 Alpine 镜像
# 构建阶段
FROM alpine:latest AS builder
ARG TARGETARCH
ENV ARCH=$TARGETARCH
# 安装构建依赖
RUN set -ex &&\
apk add --no-cache wget xz
# 下载并解压 s6-overlay
RUN set -ex &&\
case "$ARCH" in \
amd64) S6_ARCH=x86_64 ;; \
arm64) S6_ARCH=aarch64 ;; \
armv7) S6_ARCH=armhf ;; \
*) S6_ARCH=x86_64 ;; \
esac &&\
wget -qO- https://github.com/just-containers/s6-overlay/releases/latest/download/s6-overlay-noarch.tar.xz | tar -C / -Jx &&\
wget -qO- https://github.com/just-containers/s6-overlay/releases/latest/download/s6-overlay-$S6_ARCH.tar.xz | tar -C / -Jx
# 运行阶段
FROM alpine:latest
ARG TARGETARCH
ENV ARCH=$TARGETARCH
@@ -6,12 +26,15 @@ ENV ARCH=$TARGETARCH
# 设置工作目录
WORKDIR /sing-box
# 从构建阶段复制 s6-overlay 文件
COPY --from=builder / /
# 复制初始化脚本
COPY docker_init.sh /sing-box/init.sh
# 安装依赖并生成证书
# 安装运行时依赖并生成证书
RUN set -ex &&\
apk add --no-cache supervisor wget nginx bash openssl &&\
apk add --no-cache wget nginx bash openssl &&\
mkdir -p /sing-box/cert /sing-box/conf /sing-box/subscribe /sing-box/logs &&\
chmod +x /sing-box/init.sh &&\
rm -rf /var/cache/apk/*
+46 -42
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@@ -34,7 +34,7 @@ check_latest_sing-box() {
# 获取最终版本号
local VERSION=$(wget --no-check-certificate --tries=2 --timeout=3 -qO- https://api.github.com/repos/SagerNet/sing-box/releases | awk -F '["v]' -v var="tag_name.*$FORCE_VERSION" '$0 ~ var {print $5; exit}')
VERSION=${VERSION:-'v1.12.0-beta.15'}
VERSION=${VERSION:-'1.13.0-alpha.27'}
echo "$VERSION"
}
@@ -730,45 +730,34 @@ EOF
ARGO_RUNS="cloudflared tunnel --edge-ip-version auto --no-autoupdate --no-tls-verify --metrics 0.0.0.0:$METRICS_PORT --url https://localhost:$START_PORT"
fi
# 生成 supervisord 配置文件
mkdir -p /etc/supervisor.d
SUPERVISORD_CONF="[supervisord]
user=root
nodaemon=true
logfile=/dev/null
pidfile=/run/supervisord.pid
# 生成 s6-overlay 服务脚本(替代 supervisord
mkdir -p /etc/services.d/nginx /etc/services.d/sing-box
cat > /etc/services.d/nginx/run << 'EOF'
#!/usr/bin/env sh
exec /usr/sbin/nginx -g 'daemon off;'
EOF
cat > /etc/services.d/sing-box/run << EOF
#!/usr/bin/env sh
exec ${WORK_DIR}/sing-box run -C ${WORK_DIR}/conf/
EOF
chmod +x /etc/services.d/nginx/run /etc/services.d/sing-box/run
[program:nginx]
command=/usr/sbin/nginx -g 'daemon off;'
autostart=true
autorestart=true
stderr_logfile=/dev/null
stdout_logfile=/dev/null
[program:sing-box]
command=${WORK_DIR}/sing-box run -C ${WORK_DIR}/conf/
autostart=true
autorestart=true
stderr_logfile=/dev/null
stdout_logfile=/dev/null"
[ -z "$METRICS_PORT" ] && SUPERVISORD_CONF+="
[program:argo]
command=${WORK_DIR}/$ARGO_RUNS
autostart=true
autorestart=true
stderr_logfile=/dev/null
stdout_logfile=/dev/null
"
echo "$SUPERVISORD_CONF" > /etc/supervisor.d/daemon.ini
# 命名隧道模式时,argo 作为 s6 服务;Quick Tunnel 模式维持原先的前置后台拉起逻辑
if [ -z "$METRICS_PORT" ]; then
mkdir -p /etc/services.d/argo
cat > /etc/services.d/argo/run << EOF
#!/usr/bin/env sh
exec ${WORK_DIR}/${ARGO_RUNS} 2>/dev/null
EOF
chmod +x /etc/services.d/argo/run
else
# 如使用临时隧道,先运行 cloudflared 以获取临时隧道域名
if [ -n "$METRICS_PORT" ]; then
${WORK_DIR}/$ARGO_RUNS >/dev/null 2>&1 &
sleep 15
nohup ${WORK_DIR}/${ARGO_RUNS} >/dev/null 2>&1 &
until grep -q 'trycloudflare\.com' <<< "$ARGO_DOMAIN" ; do
sleep 1
local ARGO_DOMAIN=$(wget -qO- http://localhost:$METRICS_PORT/quicktunnel | awk -F '"' '{print $4}')
done
fi
# 获取自签证书指纹。argo 回源的是由 Google Trust Services(谷歌信任服务)作为中间 CA(CN=WE1)签发,受信任的证书(非自签名)
@@ -1304,11 +1293,26 @@ update_sing-box() {
local LOCAL=$(${WORK_DIR}/sing-box version | awk '/version/{print $NF}')
if [ -n "$ONLINE" ]; then
if [[ "$ONLINE" != "$LOCAL" ]]; then
wget https://github.com/SagerNet/sing-box/releases/download/v$ONLINE/sing-box-$ONLINE-linux-$SING_BOX_ARCH.tar.gz -O- | tar xz -C ${WORK_DIR} sing-box-$ONLINE-linux-$SING_BOX_ARCH/sing-box &&
mv ${WORK_DIR}/sing-box-$ONLINE-linux-$SING_BOX_ARCH/sing-box ${WORK_DIR}/sing-box &&
rm -rf ${WORK_DIR}/sing-box-$ONLINE-linux-$SING_BOX_ARCH &&
supervisorctl restart sing-box
cp -f ${WORK_DIR}/sing-box /tmp/sing-box.bak
wget https://github.com/SagerNet/sing-box/releases/download/v$ONLINE/sing-box-$ONLINE-linux-$SING_BOX_ARCH.tar.gz -O- | tar xz -C /tmp sing-box-$ONLINE-linux-$SING_BOX_ARCH/sing-box
mv /tmp/sing-box-$ONLINE-linux-$SING_BOX_ARCH/sing-box ${WORK_DIR}/sing-box
local SING_BOX_PID_OLD=$(ps aux | grep '[s]ing-box run' | awk '{print $1}')
kill -9 ${SING_BOX_PID_OLD}
sleep 1
local SING_BOX_PID_NEW=$(ps aux | grep '[s]ing-box run' | awk '{print $1}')
until [[ "${SING_BOX_PID_NEW}" =~ ^[0-9]+$ ]]; do
(( i++ ))
[ "$i" -gt 5 ] && break
sleep 1
local SING_BOX_PID_NEW=$(ps aux | grep '[s]ing-box run' | awk '{print $1}')
done
if [[ "${SING_BOX_PID_NEW}" =~ ^[0-9]+$ ]]; then
info " Sing-box v${ONLINE} 更新成功!"
else
cp -f /tmp/sing-box.bak ${WORK_DIR}/sing-box
warning " Sing-box v${ONLINE} 运行不成功,使用回旧版本 v${LOCAL} 更新成功!"
fi
rm -rf ${WORK_DIR}/sing-box-$ONLINE-linux-$SING_BOX_ARCH /tmp/sing-box.bak
else
info " Sing-box v${ONLINE} 已是最新版本!"
fi
@@ -1331,6 +1335,6 @@ case "$ACTION" in
;;
* )
install
# 运行 supervisor 进程守护,并让其成为真正的 PID 1
exec supervisord -c /etc/supervisord.conf
# 用 s6-overlay 作为 PID 1 承载守护
exec /init
esac
+1
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@@ -2308,6 +2308,7 @@ install_sing-box() {
sing-box_variables
[ -n "$PORT_NGINX" ] && check_nginx
[ ! -d ${WORK_DIR}/logs ] && mkdir -p ${WORK_DIR}/logs
[ ! -d ${TEMP_DIR} ] && mkdir -p $TEMP_DIR
ssl_certificate
hint "\n $(text 2) " && wait
sing-box_json