dumpdocker

dumpdocker creates docker image for analysis of crash dump and generates the first pass dump analysis report from the docker image.

Requirements

gdb (latest version), strace

Usage

Run dumpdocker from the crashed server:

# dumpdocker /path/executable /path/core_file

You must specify the absolute path of executable file.

After this, it creates a tar file containing the executables and the shared libraries. And then you can send this tar file and the core file to your dump analysis system. Copy the "core_file" to /dump directory of the dump analysis system.

Run the following commands on the dump analysis system:

# cat hostname.executable.YYYYMMDDHHMM.tar | docker import - <image_name>
# docker run -i -v /dump:/dump -t <image_name> /bin/bash

bash-X.X# cd /dump
bash-X.X# /opt/dumpdocker/firstpass.sh

You can review the firstpass report before moving core file to the dump analysis system. The firstpass report, fpreport.out file will be located in /opt/dumpdocker/ directory.

Samples

There is a sample source code in the samples directory. You can test dumpdocker or check the first pass report from the sample.

# cd samples
# make
cc -std=c99 -g -o sampleSegv sampleSegv.c
# ulimit -c unlimited
# ./sampleSegv 111
Segmentation fault (core dumped)
# mkdir /dump
# cp core.* /dump
# sudo ../dumpdocker $PWD/sampleSegv ./core.19389
dumpdocker 1.4.1
Gathering the shared libraries and files related with /home/pjhwa/dumpdocker/samples/sampleSegv.
Including the basic commands for dump analysis.
Generating the files related with firstpass.sh.
which: no dmidecode in (/usr/bin:/bin)
Archiving the files into samplehost.sampleSegv.201509151404.tar file.
Removing the temporary files.
Done.
# cat samplehost.sampleSegv.201509151404.tar | docker import - samplehost
# docker run -i -v /dump:/dump -t samplehost /bin/bash

bash-X.X# cd /dump
bash-X.X# /opt/dumpdocker/firstpass.sh