use supervisord

Dockerfile

@@ -11,6 +11,7 @@ RUN apt-get update && apt install -y --no-install-recommends \
     libpam-sss \
     libpam-modules \
     gettext \
+    supervisor \
  && apt-get autoclean \
  && apt-get autoremove \
  && rm -rf /var/lib/apt/lists/*
@@ -34,8 +35,8 @@ COPY nsswitch.conf /etc/nsswitch.conf
 COPY common-session /etc/pam.d/common-session
 COPY skel /etc/skel
 
-COPY startup.sh /root/startup.sh
+COPY supervisord.conf /etc/supervisord.conf
+COPY sssd.sv.conf /etc/supervisor/conf.d/sssd.sv.conf
+COPY sshd.sv.conf /etc/supervisor/conf.d/sshd.sv.conf
 
-VOLUME /home
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]
-
-CMD ["/bin/bash", "/root/startup.sh"]

sshd.sv.conf

@@ -0,0 +1,5 @@
+[program:sshd]
+command=/usr/sbin/sshd -e -D
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true

sssd.sv.conf

@@ -0,0 +1,14 @@
+[program:sssd_init]
+command=
+    /bin/bash -c "envsubst < /etc/sssd/sssd.conf.env > /etc/sssd/sssd.conf; chmod 600 /etc/sssd/sssd.conf; supervisorctl start sssd"
+autorestart=false
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true
+
+[program:sssd]
+command=/bin/bash -c "rm -rf /var/run/sssd.pid; /usr/sbin/sssd -i"
+autostart=false
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true

startup.sh

@@ -1,6 +0,0 @@
-envsubst < /etc/sssd/sssd.conf.env > /etc/sssd/sssd.conf
-chmod 600 /etc/sssd/sssd.conf
-
-rm -rf /var/run/sssd.pid
-/usr/sbin/sssd -f
-/usr/sbin/sshd -e -D

supervisord.conf

@@ -0,0 +1,19 @@
+[supervisord]
+nodaemon=true
+user=root
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true
+
+[unix_http_server]
+file=/var/run/supervisor.sock
+chmod=0700
+
+[rpcinterface:supervisor]
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
+
+[supervisorctl]
+serverurl=unix:///var/run/supervisor.sock
+
+[include]
+files = /etc/supervisor/conf.d/*.conf