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- #!/usr/bin/env bash
- # Copyright 2016 The Kubernetes Authors.
- #
- # 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.
- set -e
- CFG=/opt/redis/redis.conf
- HOSTNAME=$(hostname)
- DATADIR="/data"
- # Port on which redis listens for connections.
- PORT=6379
- # Ping everyone but ourself to see if there's a master. Only one pet starts at
- # a time, so if we don't see a master we can assume the position is ours.
- while read -ra LINE; do
- if [[ "${LINE[0]}" == *"${HOSTNAME}"* ]]; then
- sed -i -e "s|^bind.*$|bind ${LINE[0]}|" ${CFG}
- elif [ "$(/opt/redis/redis-cli -h "${LINE[0]}" info | grep role | sed 's,\r$,,')" = "role:master" ]; then
- # TODO: More restrictive regex?
- sed -i -e "s|^# slaveof.*$|slaveof ${LINE[0]} ${PORT}|" ${CFG}
- fi
- done
- # Set the data directory for append only log and snapshot files. This should
- # be a persistent volume for consistency.
- sed -i -e "s|^.*dir .*$|dir ${DATADIR}|" ${CFG}
- # The append only log is written for every SET operation. Without this setting,
- # redis just snapshots periodically which is only safe for a cache. This will
- # produce an appendonly.aof file in the configured data dir.
- sed -i -e "s|^appendonly .*$|appendonly yes|" ${CFG}
- # Every write triggers an fsync. Recommended default is "everysec", which
- # is only safe for AP applications.
- sed -i -e "s|^appendfsync .*$|appendfsync always|" ${CFG}
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