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#!/bin/bash -x
# On container start, run an rsync to get a good copy of the tree.
# Then execute rsyncd; we will start serving once the sync completes.
# Then keep syncing in the background every 30m.
function sync() {
OPTS=(
--quiet
--recursive
--links
--perms
--times
--delete
--timeout=300
--checksum
)
SRC="${2}"
DST="${1}"
echo "Started update at" $(date) >> $0.log 2>&1
logger -t rsync "re-rsyncing the gentoo-portage tree"
/usr/bin/rsync ${OPTS[@]} "${SRC}" "${DST}" >> $0.log 2>&1
echo "End: "$(date) >> $0.log 2>&1
return 0
}
tmp=$(mktemp -d -p "${DEST_DIR}" XXXXXX)
sync "${tmp}" "${SOURCE_MIRROR}" # this is synchronous.
# We serve out of ${DEST_DIR}/serving
ln -s "${tmp}" "serving"
# Then launch rsyncd; it will detach into the background and serve from serving.
rsync --daemon --config="/opt/rsync/rsyncd.conf"
while true
do
sleep "${WAIT_TIME}"
tmp=$(mktemp -d -p "${DEST_DIR}" XXXXXX)
# If we fail to sync, just try again.
if ! sync "${tmp}" "${SOURCE_MIRROR}"; then
rm -rf "${tmp}"
continue
fi
# Atomically rename
ln -sf "${tmp}" "staging" && \
mv -fT "${DEST_DIR}/staging" "${DEST_DIR}/serving"
done
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