Last active
March 5, 2024 09:34
-
-
Save liamg/a4a7ed03fd9f9c55119ec1a2b1178a88 to your computer and use it in GitHub Desktop.
Generate memory dumps for docker container processes
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/env bash | |
# | |
# Generate core dumps of docker container processes | |
# | |
# Usage: | |
# ./dump_docker_memory.sh [containerid] | |
# | |
# Output directory will be created in /tmp | |
# | |
set -eo pipefail | |
containerid=$1 | |
if [[ "$containerid" = "" ]]; then | |
echo "Usage: $0 [containerid]" | |
exit 1 | |
fi | |
dir="/tmp/${containerid}" | |
mkdir -p "${dir}" | |
rm -f $dir/core.* | |
pushd $dir | |
echo | |
echo "Finding process ID for ${containerid}..." | |
pid=$(docker inspect "${containerid}" | grep '"Pid"' | head -n1 | awk -F':' '{print $2}' | sed 's/[^0-9]//g') | |
if [[ "$pid" = "0" ]]; then | |
echo "Container ${containerid} is not running." | |
exit 1 | |
fi | |
echo | |
echo "Looking for child processes..." | |
children=$(pstree -p $pid | awk -F'}' '{print $2}' | sed 's/[^0-9]*//g') | |
for child in $children; do | |
echo | |
echo "Dumping for pid ${child}..." | |
gcore $child | |
done | |
echo | |
echo "Dumps are available in ${dir}:" | |
ls -la ${dir}/core.* | |
echo |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment