Make supervisord exit when key processes die, fixes #1137 (#1142)

containers/ddev-webserver/files/etc/supervisor/apache.conf

@@ -1,5 +1,4 @@
 [program:apache2]
-; startsecs = 1
 stopwaitsecs = 20
 startretries=10
 stopsignal = WINCH

containers/ddev-webserver/files/etc/supervisor/conf.d/supervisor.conf

@@ -3,3 +3,8 @@ logfile=/var/log/supervisord.log ; (main log file;default $CWD/supervisord.log)
 loglevel=info                ; (log level;default info; others: debug,warn,trace)
 pidfile=//var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
 nodaemon=false               ; (start in foreground if true;default false)
+
+[eventlistener:child_exit_monitor]
+command=/usr/local/bin/kill_supervisor.py
+process_name=child_exit_monitor
+events=PROCESS_STATE_FATAL,PROCESS_STATE_EXITED

containers/ddev-webserver/files/usr/local/bin/kill_supervisor.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+import sys
+import os
+import signal
+
+# From https://blog.zhaw.ch/icclab/process-management-in-docker-containers/
+
+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()
+       write_stdout('This line kills supervisor: ' + line);
+       try:
+               pidfile = open('/var/run/supervisord.pid','r')
+               pid = int(pidfile.readline());
+               os.kill(pid, signal.SIGQUIT)
+       except Exception as e:
+               write_stdout('Could not kill supervisor: ' + e.strerror + '\n')
+       write_stdout('RESULT 2\nOK')
+if __name__ == '__main__':
+   main()
+   import sys

pkg/version/version.go

@@ -25,7 +25,7 @@ var DockerComposeFileFormatVersion = "3.6"
 var WebImg = "drud/ddev-webserver"
 
 // WebTag defines the default web image tag for drud dev
-var WebTag = "20181004_check_cms_content" // Note that this can be overridden by make
+var WebTag = "20180929_nginx_quit_immediately" // Note that this can be overridden by make
 
 // DBImg defines the default db image used for applications.
 var DBImg = "drud/ddev-dbserver"