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78 lines
2.6 KiB
78 lines
2.6 KiB
#!/bin/sh
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#
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# MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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export MINIO_USERNAME=${MINIO_USERNAME:-"minio"}
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export MINIO_GROUPNAME=${MINIO_GROUPNAME:-"minio"}
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# If command starts with an option, prepend minio.
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if [ "${1}" != "minio" ]; then
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if [ -n "${1}" ]; then
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set -- minio "$@"
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fi
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fi
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## Look for docker secrets in default documented location.
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docker_secrets_env() {
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ACCESS_KEY_FILE="/run/secrets/$MINIO_ACCESS_KEY_FILE"
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SECRET_KEY_FILE="/run/secrets/$MINIO_SECRET_KEY_FILE"
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if [ -f "$ACCESS_KEY_FILE" ] && [ -f "$SECRET_KEY_FILE" ]; then
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if [ -f "$ACCESS_KEY_FILE" ]; then
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MINIO_ACCESS_KEY="$(cat "$ACCESS_KEY_FILE")"
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export MINIO_ACCESS_KEY
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fi
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if [ -f "$SECRET_KEY_FILE" ]; then
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MINIO_SECRET_KEY="$(cat "$SECRET_KEY_FILE")"
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export MINIO_SECRET_KEY
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fi
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fi
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}
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## Create UID/GID based on available environment variables.
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docker_set_uid_gid() {
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addgroup -S "$MINIO_GROUPNAME" >/dev/null 2>&1 && \
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adduser -S -G "$MINIO_GROUPNAME" "$MINIO_USERNAME" >/dev/null 2>&1
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}
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# su-exec to requested user, if user cannot be requested
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# existing user is used automatically.
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docker_switch_user() {
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owner=$(check-user "$@")
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if [ "${owner}" != "${MINIO_USERNAME}:${MINIO_GROUPNAME}" ]; then
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## Print the message only if we are not using non-default username:groupname.
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if [ "${MINIO_USERNAME}:${MINIO_GROUPNAME}" != "minio:minio" ]; then
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echo "Requested username/group ${MINIO_USERNAME}:${MINIO_GROUPNAME} cannot be used"
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echo "Found existing data with user ${owner}, we will continue and use ${owner} instead."
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return
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fi
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fi
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# check if su-exec is allowed, if yes proceed proceed.
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if su-exec "${owner}" "/bin/ls" >/dev/null 2>&1; then
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exec su-exec "${owner}" "$@"
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fi
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# fallback
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exec "$@"
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}
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## Set access env from secrets if necessary.
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docker_secrets_env
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## User Input UID and GID
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docker_set_uid_gid
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## Switch to user if applicable.
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docker_switch_user "$@"
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