Merge pull request #2132 from coreos-inc/gcore

Dump core when killing buildmanager from monit

Dockerfile

@@ -9,6 +9,7 @@ ENV HOME /root
 RUN apt-get update # 02NOV2016
 RUN apt-get install -y \
      g++               \
+     gdb               \
      gdebi-core        \
      git               \
      libevent-2.0.5    \
@@ -31,6 +32,7 @@ RUN apt-get install -y \
      nginx             \
      nodejs            \
      npm               \
+     python-dbg        \
      python-dev        \
      python-pip        \
      python-virtualenv
@@ -113,6 +115,7 @@ ADD conf/init/zz_boot.sh /etc/my_init.d/
 ADD conf/init/service/ /etc/service/
 RUN rm -rf /etc/service/syslog-forwarder
 
+ADD conf/kill-buildmanager.sh /usr/local/bin/kill-buildmanager.sh
 ADD conf/monitrc /etc/monit/monitrc
 RUN chmod 0600 /etc/monit/monitrc
 

conf/kill-buildmanager.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+PID=$(cat /etc/service/buildmanager/supervise/pid)
+gcore -o /tmp/buildman.core $PID
+
+/usr/bin/sv kill /etc/service/buildmanager

conf/monitrc

@@ -7,7 +7,7 @@ set httpd port 2812 and
 
 check host buildmanager with address localhost
     start program = "/usr/bin/sv start /etc/service/buildmanager" with timeout 10 seconds
-    stop program  = "/usr/bin/sv kill /etc/service/buildmanager"
+    stop program  = "/usr/local/bin/kill-buildmanager.sh"
     if failed port 8787 protocol http
       request "/"
       status = 405