manage supervisord with php

Dockerfile

@@ -21,6 +21,7 @@ RUN \
     php7-mbstring \
     php7-json \
     php7-fileinfo \
+    php7-pcntl \
     git \
     tar
 
@@ -39,7 +40,6 @@ COPY nginx.conf /etc/nginx/conf.d/default.conf
 COPY php-fpm.conf /etc/php7/php-fpm.d/ttrss.conf
 COPY install-db.php /var/lib/tt-rss-install/install-db.php
 COPY supervisor.conf /var/lib/tt-rss-install/supervisor.conf
-COPY manage-supervisord.py /var/lib/tt-rss-install/manage-supervisord.py
 COPY config.php /var/lib/tt-rss/config.php
 
 RUN \

manage-supervisord.py

@@ -1,23 +0,0 @@
-#!/usr/bin/python
-import sys
-import os
-import signal
-
-def write_stdout(s):
-    sys.stdout.write(s)
-    sys.stdout.flush()
-
-def write_stderr(s):
-    sys.stderr.write(s)
-    sys.stderr.flush()
-
-def main():
-    while 1:
-        write_stdout('READY\n')
-        line = sys.stdin.readline()
-        os.kill(1, signal.SIGTERM)
-        write_stdout('RESULT 2\nOK')
-
-if __name__ == '__main__':
-    main()
-    import sys

supervisor.conf

@@ -29,5 +29,5 @@ stderr_logfile=/dev/stderr
 stderr_logfile_maxbytes=0
 
 [eventlistener:quit_on_failure]
-command=/usr/bin/python /var/lib/tt-rss-install/manage-supervisord.py
+command=/usr/bin/php7 -r 'chdir("/var/lib/tt-rss"); while (true) { print("READY\n"); readline(); posix_kill(1, SIGTERM); print("RESULT 2\nOK"); }'
 events=PROCESS_STATE_FATAL