minio/buildscripts/docker-entrypoint.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.
#
# If command starts with an option, prepend minio.
if [ "${1}" != "minio" ]; then
if [ -n "${1}" ]; then
set -- minio "$@"
fi
fi
# Wait for all the hosts to come online and have
# their DNS entries populated properly.
docker_wait_hosts() {
hosts="$@"
num_hosts=0
# Count number of hosts in arguments.
for host in $hosts; do
[ $(echo "$host" | grep -E "^http") ] || continue
num_hosts=$((num_hosts+1))
done
if [ $num_hosts -gt 0 ]; then
echo -n "Waiting for all hosts to resolve..."
while true; do
x=0
for host in $hosts; do
[ $(echo "$host" | grep -E "^http") ] || continue
# Extract the domain.
host=$(echo $host | sed -e 's/^http[s]\?:\/\/\([^\/]\+\).*/\1/')
echo -n .
val=$(ping -c 1 $host 2>/dev/null)
if [ $? != 0 ]; then
echo "Failed to lookup $host"
continue
fi
x=$((x+1))
done
# Provided hosts same as successful hosts, should break out.
test $x -eq $num_hosts && break
echo "Failed to resolve hosts.. retrying after 1 second."
sleep 1
done
echo "All hosts are resolving proceeding to initialize Minio."
fi
}
## Look for docker secrets in default documented location.
docker_secrets_env() {
local MINIO_ACCESS_KEY_FILE="/run/secrets/access_key"
local MINIO_SECRET_KEY_FILE="/run/secrets/secret_key"
if [ -f $MINIO_ACCESS_KEY_FILE -a -f $MINIO_SECRET_KEY_FILE ]; then
if [ -f $MINIO_ACCESS_KEY_FILE ]; then
export MINIO_ACCESS_KEY="$(cat "$MINIO_ACCESS_KEY_FILE")"
fi
if [ -f $MINIO_SECRET_KEY_FILE ]; then
export MINIO_SECRET_KEY="$(cat "$MINIO_SECRET_KEY_FILE")"
fi
fi
}
## Set access env from secrets if necessary.
docker_secrets_env
## Wait for all the hosts to come online.
docker_wait_hosts "$@"
exec "$@"