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minio/dockerscripts/docker-entrypoint.sh

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2.6 KiB

#!/bin/sh
#
# MinIO Cloud Storage, (C) 2019 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.
#
export MINIO_USERNAME=${MINIO_USERNAME:-"minio"}
export MINIO_GROUPNAME=${MINIO_GROUPNAME:-"minio"}
# If command starts with an option, prepend minio.
if [ "${1}" != "minio" ]; then
if [ -n "${1}" ]; then
set -- minio "$@"
fi
fi
## Look for docker secrets in default documented location.
docker_secrets_env() {
ACCESS_KEY_FILE="/run/secrets/$MINIO_ACCESS_KEY_FILE"
SECRET_KEY_FILE="/run/secrets/$MINIO_SECRET_KEY_FILE"
if [ -f "$ACCESS_KEY_FILE" ] && [ -f "$SECRET_KEY_FILE" ]; then
if [ -f "$ACCESS_KEY_FILE" ]; then
MINIO_ACCESS_KEY="$(cat "$ACCESS_KEY_FILE")"
export MINIO_ACCESS_KEY
fi
if [ -f "$SECRET_KEY_FILE" ]; then
MINIO_SECRET_KEY="$(cat "$SECRET_KEY_FILE")"
export MINIO_SECRET_KEY
fi
fi
}
## Create UID/GID based on available environment variables.
docker_set_uid_gid() {
addgroup -S "$MINIO_GROUPNAME" >/dev/null 2>&1 && \
adduser -S -G "$MINIO_GROUPNAME" "$MINIO_USERNAME" >/dev/null 2>&1
}
# su-exec to requested user, if user cannot be requested
# existing user is used automatically.
docker_switch_user() {
owner=$(check-user "$@")
if [ "${owner}" != "${MINIO_USERNAME}:${MINIO_GROUPNAME}" ]; then
## Print the message only if we are not using non-default username:groupname.
if [ "${MINIO_USERNAME}:${MINIO_GROUPNAME}" != "minio:minio" ]; then
echo "Requested username/group ${MINIO_USERNAME}:${MINIO_GROUPNAME} cannot be used"
echo "Found existing data with user ${owner}, we will continue and use ${owner} instead."
return
fi
fi
# check if su-exec is allowed, if yes proceed proceed.
if su-exec "${owner}" "/bin/ls" >/dev/null 2>&1; then
exec su-exec "${owner}" "$@"
fi
# fallback
exec "$@"
}
## Set access env from secrets if necessary.
docker_secrets_env
## User Input UID and GID
docker_set_uid_gid
## Switch to user if applicable.
docker_switch_user "$@"