2018-07-18 14:47:22 +00:00
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#!/usr/bin/env bash
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2018-01-09 18:57:14 +00:00
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# Copyright 2016 The Kubernetes Authors.
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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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# This script will set up and run rsyncd to allow data to move into and out of
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# our dockerized build system. This is used for syncing sources and changes of
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# sources into the docker-build-container. It is also used to transfer built binaries
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# and generated files back out.
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#
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# When run as root (rare) it'll preserve the file ids as sent from the client.
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# Usually it'll be run as non-dockerized UID/GID and end up translating all file
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# ownership to that.
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set -o errexit
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set -o nounset
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set -o pipefail
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# The directory that gets sync'd
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VOLUME=${HOME}
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# Assume that this is running in Docker on a bridge. Allow connections from
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# anything on the local subnet.
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ALLOW=$(ip route | awk '/^default via/ { reg = "^[0-9./]+ dev "$5 } ; $0 ~ reg { print $1 }')
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CONFDIR="/tmp/rsync.k8s"
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PIDFILE="${CONFDIR}/rsyncd.pid"
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CONFFILE="${CONFDIR}/rsyncd.conf"
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SECRETS="${CONFDIR}/rsyncd.secrets"
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mkdir -p "${CONFDIR}"
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if [[ -f "${PIDFILE}" ]]; then
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PID=$(cat "${PIDFILE}")
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echo "Cleaning up old PID file: ${PIDFILE}"
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kill $PID &> /dev/null || true
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rm "${PIDFILE}"
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fi
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PASSWORD=$(</rsyncd.password)
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cat <<EOF >"${SECRETS}"
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k8s:${PASSWORD}
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EOF
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chmod go= "${SECRETS}"
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USER_CONFIG=
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if [[ "$(id -u)" == "0" ]]; then
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USER_CONFIG=" uid = 0"$'\n'" gid = 0"
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fi
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cat <<EOF >"${CONFFILE}"
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pid file = ${PIDFILE}
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use chroot = no
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log file = /dev/stdout
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reverse lookup = no
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munge symlinks = no
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port = 8730
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[k8s]
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numeric ids = true
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$USER_CONFIG
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hosts deny = *
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hosts allow = ${ALLOW} ${ALLOW_HOST-}
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auth users = k8s
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secrets file = ${SECRETS}
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read only = false
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path = ${VOLUME}
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filter = - /.make/ - /_tmp/
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EOF
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exec /usr/bin/rsync --no-detach --daemon --config="${CONFFILE}" "$@"
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