minitor/scripts/docker_check.sh

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#! /bin/bash
set -e
#################
# docker_check.sh
#
# Checks the most recent state exit code of a Docker container
#################
container_name=$1
# Returns caintainer ID for a given container name
function get_container_id {
local container_name=$1
curl --unix-socket /var/run/docker.sock 'http://localhost/containers/json?all=1' 2>/dev/null \
| jq -r ".[] | {Id, Name: .Names[]} | select(.Name == \"/${container_name}\") | .Id"
}
# Returns container JSON
function inspect_container {
local container_id=$1
curl --unix-socket /var/run/docker.sock http://localhost/containers/$container_id/json 2>/dev/null
}
if [ -z "$container_name" ]; then
echo "Usage: $0 container_name"
echo "Will exit with the last status code of continer with provided name"
exit 1
fi
container_id=$(get_container_id $container_name)
if [ -z "$container_id" ]; then
echo "ERROR: Could not find container with name: $container_name"
exit 1
fi
exit_code=$(inspect_container $container_id | jq -r .State.ExitCode)
exit $exit_code