minio/buildscripts/healthcheck.sh

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#!/bin/sh
#
# Minio Cloud Storage, (C) 2017 Minio, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
_init () {
scheme="http://"
address="127.0.0.1:9000"
resource="/minio/index.html"
start=$(stat -c "%Y" /proc/1)
}
healthcheck_main () {
# In distributed environment like Swarm, traffic is routed
# to a container only when it reports a `healthy` status. So, we exit
# with 0 to ensure healthy status till distributed Minio starts (120s).
#
# Refer: https://github.com/moby/moby/pull/28938#issuecomment-301753272
if [ $(( $(date +%s) - start )) -lt 120 ]; then
exit 0
else
# Get the http response code
http_response=$(curl -s -k -o /dev/null -I -w "%{http_code}" \
${scheme}${address}${resource})
# Get the http response body
http_response_body=$(curl -k -s ${scheme}${address}${resource})
# server returns response 403 and body "SSL required" if non-TLS
# connection is attempted on a TLS-configured server. Change
# the scheme and try again
if [ "$http_response" = "403" ] && \
[ "$http_response_body" = "SSL required" ]; then
scheme="https://"
http_response=$(curl -s -k -o /dev/null -I -w "%{http_code}" \
${scheme}${address}${resource})
fi
# If http_repsonse is 200 - server is up. When MINIO_BROWSER is
# set to off, curl responds with 404. We assume that the server
# is up
[ "$http_response" = "200" ] || [ "$http_response" = "404" ]
fi
}
_init && healthcheck_main