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new 4542f69 DISPATCH-1668: Describe using core dumps in docker containers
4542f69 is described below
commit 4542f69577ecae191dae5b1894465588d4fabef8
Author: Chuck Rolke <c...@apache.org>
AuthorDate: Fri May 22 15:39:33 2020 -0400
DISPATCH-1668: Describe using core dumps in docker containers
---
dockerfiles/README.md | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/dockerfiles/README.md b/dockerfiles/README.md
index c85476b..30222ae 100644
--- a/dockerfiles/README.md
+++ b/dockerfiles/README.md
@@ -51,6 +51,32 @@ The dockerfiles follow these steps before launching the
dispatch router
####Running unit tests
Uncomment the line *RUN ctest -VV* to run the dispatch unit and system tests.
+####Getting core dumps and backtraces from qdrouterd crashes and asserts
+
+* Install gdb. Add another step to the Docker build file and rebuild.
+
+ RUN dnf -y install gdb
+
+* Run the docker image shell prompt in a container with extended privileges
+
+ sudo docker run --privileged -i -t docker-image-name /bin/bash
+
+* At the container shell prompt enable crash dumps (as appropriate for your
container host)
+
+ $ ulimit -c unlimited
+
+ $ echo "coredump.%e.%p" > /proc/sys/kernel/core_pattern
+
+* From the build directory run ctest
+
+ $ ctest -VV -R some_test
+
+* From the build directory examine core file in test setUpClass directory of
the failed router. The core file is in the same directory as the router log
file. The example shown here is for a policy oversize basic test failure while
using the MaxMessageSizeBlockOversize class.
+
+ $ gdb router/qdrouterd
./tests/system_test.dir/system_tests_policy_oversize_basic/MaxMessageSizeBlockOversize/setUpClass/coredump.nnn.mmm
+
+ (gdb) bt
+
####Note
These dockerfiles are provided for developers to quickly get started with the
dispatch router and are not intended for use in production environments.
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