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