diff --git a/d1/cpanel.py b/d1/cpanel.py
new file mode 100644
index 0000000..d285874
--- /dev/null
+++ b/d1/cpanel.py
@@ -0,0 +1,141 @@
+import subprocess
+import sys
+import io
+import copy
+import traceback
+import datetime
+import pprint
+import logging
+import json
+import time
+
+with io.open(
+    'tmp/d1/cpanel.json', 'r'
+) as f:
+    t3 = json.load(f)
+
+t2 = copy.deepcopy(t3)
+for k in t2:
+    v = t2[k]
+    v['task'] = lambda : subprocess.Popen(
+        v['task_cmd'],
+        stdin=subprocess.DEVNULL,
+    )
+
+def stop_task(task):
+    task.terminate()
+    try:
+        task.wait(1)
+    except:
+        task.kill()
+
+t1 = dict()
+
+shutdown = False
+
+while True:
+    try:
+        for k, v in t2.items():
+            if not k in t1:
+                logging.info(json.dumps(dict(
+                    task=k,
+                    status='starting',
+                )))
+                t1[k] = v['task']()
+                logging.info(json.dumps(dict(
+                    task=k,
+                    status='started',
+                )))
+                continue
+
+            o = t1[k]
+
+            not_alive = None
+
+            try:
+                url_content = []
+                with subprocess.Popen(
+                    [
+                        'curl',
+                        '-q', '--silent',
+                        '-v',
+                        '--max-time', '4',
+                        '--max-filesize', '%d' % (4 * 1024 * 1024),
+                        v['url'],
+                    ],
+                    stdout=subprocess.DEVNULL,
+                    stderr=subprocess.PIPE,
+                ) as curl:
+                    def read_chunk():
+                        chunk = curl.stderr.read().decode('utf-8')
+                        if isinstance(chunk, str) and len(chunk) > 0:
+                            url_content.append(chunk)
+
+                        if isinstance(chunk, str) and 'status: ' in chunk:
+                            stop_task(curl)
+
+                        return chunk
+
+                    while curl.poll() is None:
+                        read_chunk()
+
+                    while True:
+                        chunk = read_chunk()
+
+                        if chunk is None or chunk == '':
+                            break
+
+                url_content2 = ''.join(url_content)
+
+                if not 'status: 502' in url_content2 and (
+                    'status: 200' in url_content2 or
+                    'status: 302' in url_content2
+                ):
+                    not_alive = False
+                else:
+                    not_alive = True
+            except:
+                logging.error(json.dumps(dict(
+                    error=traceback.format_exc(),
+                )))
+                not_alive = True
+
+            if not_alive:
+                logging.error(json.dumps(
+                    dict(
+                        o=pprint.pformat(o.__dict__),
+                        status='not_alive',
+                    )
+                ))
+
+                stop_task(o)
+                del t1[k]
+                continue
+
+            if not o.poll() is None:
+                logging.error(json.dumps(
+                    dict(
+                        o=pprint.pformat(o.__dict__),
+                        return_code=o.poll(),
+                        status='crashed',
+                    )
+                ))
+                del t1[k]
+                continue
+
+        if shutdown:
+            break
+
+        print('\r%s tasks %d' % (
+            datetime.datetime.now().isoformat(),
+            len(t1),
+        ), end='')
+        sys.stdout.flush()
+    except KeyboardInterrupt:
+        print('\nshutting down')
+        break
+    finally:
+        time.sleep(10)
+
+for o in t1:
+    stop_task(o)
diff --git a/d1/f2.py b/d1/f2.py
index 0aac2b4..c51a442 100644
--- a/d1/f2.py
+++ b/d1/f2.py
@@ -20,7 +20,7 @@ sys.path.insert(0, os.path.dirname(__file__))
 
 
 class Application:
-    MAX_FILE_SIZE = 2 * 1024 * 1024 * 1024
+    MAX_FILE_SIZE = 4 * 1024 * 1024 * 1024
     CHUNK_SIZE = 4096
     MAX_OUTPUT_SIZE = 4 * 1024 * 1024
     LOG_SIZE = 10 * 1024 * 1024
diff --git a/docker-compose.yml b/docker-compose.yml
index 29b0c90..3a0e3d2 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,6 +8,16 @@ services:
       - ./d1/nginx_config.py:/app/d1/nginx_config.py:ro
       - ./tmp/cache/forward.nginx.json:/app/tmp/cache/forward.nginx.json:ro
     restart: always
+  cpanel:
+    build:
+      context: .
+      dockerfile: ./docker/cpanel/Dockerfile
+    links:
+      - app
+    volumes:
+      - ./d1/:/app/d1:ro
+      - ./tmp/d1/:/app/tmp/d1/:ro
+    restart: always
   dynu:
     build:
       context: .
diff --git a/docker/cpanel/Dockerfile b/docker/cpanel/Dockerfile
new file mode 100644
index 0000000..9d0c81c
--- /dev/null
+++ b/docker/cpanel/Dockerfile
@@ -0,0 +1,13 @@
+FROM alpine:latest
+RUN apk add openssh
+RUN apk add python3
+RUN apk add tini
+RUN apk add bash curl
+RUN apk add py3-pip
+RUN pip3 install requests
+
+WORKDIR /app
+
+ENTRYPOINT ["tini", "--"]
+
+CMD ["python3", "d1/cpanel.py"]
diff --git a/dotfiles/.local/bin/commands b/dotfiles/.local/bin/commands
index 60c87ef..812d251 100755
--- a/dotfiles/.local/bin/commands
+++ b/dotfiles/.local/bin/commands
@@ -1039,6 +1039,7 @@ def http_server(argv):
                 -u root \
                 -it --entrypoint=/bin/bash \
                 -v $PWD:/app:ro \
+                --log-driver none \
                 nginx:latest \
                 -c 'echo "server{listen 80; charset UTF-8; root /app; %s}" > /etc/nginx/conf.d/default.conf; nginx -g "daemon off;"'
         ''' % (
@@ -1351,6 +1352,13 @@ def desktop_services(argv):
         action='store_true',
         help='decrease keyboard backlight',
     )
+    parser.add_option(
+        '--backlight_service',
+        dest='backlight_service',
+        action='store_true',
+        default=False,
+        help='enable backlight_service',
+    )
 
     options, args = parser.parse_args(argv)
 
@@ -1864,7 +1872,10 @@ def desktop_services(argv):
                 self.events = []
                 self.last_skip_loop = None
                 self.data = []
-                self.backlight = Backlight()
+                if options.backlight_service:
+                    self.backlight = Backlight()
+                else:
+                    self.backlight = None
                 self.bg = None
                 self.bg_terminate = False
 
@@ -2123,7 +2134,8 @@ def desktop_services(argv):
                         pprint.pprint(self.events)
                         del self.events[:]
 
-                self.backlight.check()
+                if not self.backlight is None:
+                    self.backlight.check()
 
                 self.background_check()