minitor/scripts/docker_check.sh

52 lines
1.3 KiB
Bash
Raw Normal View History

#! /bin/bash
set -e
#################
# docker_check.sh
#
# Checks the most recent state exit code of a Docker container
#################
# Docker host will default to a socket
# To override, export DOCKER_HOST to a new hostname
DOCKER_HOST="${DOCKER_HOST:=socket}"
container_name="$1"
# Curls Docker either using a socket or URL
function curl_docker {
local path="$1"
if [ "$DOCKER_HOST" == "socket" ]; then
curl --unix-socket /var/run/docker.sock "http://localhost/$path" 2>/dev/null
else
curl "http://${DOCKER_HOST}/$path" 2>/dev/null
fi
}
# Returns caintainer ID for a given container name
function get_container_id {
local container_name="$1"
curl_docker 'containers/json?all=1' \
| jq -r ".[] | {Id, Name: .Names[]} | select(.Name == \"/${container_name}\") | .Id"
}
# Returns container JSON
function inspect_container {
local container_id=$1
curl_docker "containers/$container_id/json"
}
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"