74 lines
1.8 KiB
Bash
Executable File
74 lines
1.8 KiB
Bash
Executable File
#! /bin/bash
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set -e
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#################
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# docker_healthcheck.sh
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#
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# Returns the results of a Docker Healthcheck for a container
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#################
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# Docker host will default to a socket
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# To override, export DOCKER_HOST to a new hostname
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DOCKER_HOST="${DOCKER_HOST:=socket}"
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container_name="$1"
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num_log_lines="$2"
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# Curls Docker either using a socket or URL
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function curl_docker {
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local path="$1"
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if [ "$DOCKER_HOST" == "socket" ]; then
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curl --unix-socket /var/run/docker.sock "http://localhost/$path" 2>/dev/null
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else
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curl "http://${DOCKER_HOST}/$path" 2>/dev/null
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fi
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}
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# Returns caintainer ID for a given container name
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function get_container_id {
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local container_name="$1"
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curl_docker 'containers/json?all=1' \
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| jq -r ".[] | {Id, Name: .Names[]} | select(.Name == \"/${container_name}\") | .Id"
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}
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# Returns container JSON
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function inspect_container {
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local container_id="$1"
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curl_docker "containers/$container_id/json"
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}
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# Gets some lines from docker log
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function get_logs {
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container_id="$1"
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num_lines="$2"
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curl_docker "containers/$container_id/logs?stdout=1&stderr=1" | tail -n "$num_lines"
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}
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if [ -z "$container_name" ]; then
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echo "Usage: $0 container_name [num_log_lines]"
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echo "Will return results of healthcheck for continer with provided name"
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exit 1
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fi
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container_id=$(get_container_id "$container_name")
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if [ -z "$container_id" ]; then
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echo "ERROR: Could not find container with name: $container_name"
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exit 1
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fi
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health=$(inspect_container "$container_id" | jq -r '.State.Health.Status')
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if [ -n "$num_log_lines" ]; then
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get_logs "$container_id" "$num_log_lines"
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fi
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case "$health" in
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null)
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echo "No healthcheck results"
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;;
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starting|healthy)
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echo "Status: '$health'"
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;;
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*)
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echo "Status: '$health'"
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exit 1
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esac
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