Redis

Redis#

To use Redis with the presented configuration, client programs need to access Redis’s socket at /var/run/redis/redis-server.sock. You need to add the running client users to the redis group. As an alternative you can also use socat to create a copy of the socket with the appropriate permissions.

Important

In this example we will use /redis as the database destination to avoid filling up the root partition.

See also

  • amazon ec2 - Redis reports read-only filesystem, but it isn’t - Server Fault [1]

  1. install the dependencies

    apt-get update
apt-get install redis-server rsync

  2. create the new redis directory

    systemctl stop redis.service
mkdir /redis

  3. mount the partition in /redis

  4. move the existing content

    rsync --avAX /var/lib/redis/dump.rdb /redis

  5. edit the configuration file like this

    /etc/redis/redis.conf#
    bind 127.0.0.1
protected-mode yes
port 0
tcp-backlog 511
unixsocket /var/run/redis/redis-server.sock
unixsocketperm 770
timeout 0
tcp-keepalive 300
daemonize yes
supervised no
pidfile /var/run/redis/redis-server.pid
loglevel verbose
logfile /var/log/redis/redis-server.log
databases 32
always-show-logo no
save 900 1000
save 300 10000
save 60 10000000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir /redis
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing no
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

  6. edit the service unit file

    systemctl edit redis.service

    Add this content

    [Service]
ReadWritePaths=-/redis

  7. restart the service

    systemctl restart redis.service

Footnotes