Configure Application to Use Redis

Configuration for Standalone Redis Setup

Update the config/parameters.yml with the following:

session_handler_dsn:  'redis://127.0.0.1:6379/0'
redis_dsn_cache:      'redis://127.0.0.1:6380/1'
redis_dsn_doctrine:   'redis://127.0.0.1:6380/2'
redis_dsn_layout:     'redis://127.0.0.1:6380/3'

Configuration for Redis Cluster Setup

Update the config/parameters.yml with the following:

session_handler_dsn:  'redis://127.0.0.1:6379?host[127.0.0.1:6380]&cluster=predis'
redis_dsn_cache:      'redis://127.0.0.1:6379?host[127.0.0.1:6380]&cluster=predis/0'
redis_dsn_doctrine:   'redis://127.0.0.1:6379?host[127.0.0.1:6380]&dbindex=1&cluster=predis'
redis_dsn_layout:     'redis://127.0.0.1:6379?host[127.0.0.1:6380]&dbindex=2&cluster=predis'

Note

If authentication is required a shared among connections password can be added only to the main host: redis://password@127.0.0.1:6379?host[127.0.0.1:6380]&cluster=predis. It’s also true to other DSN string types: standalone, cluster or sentinel

Configuration for Sentinel Redis Setup

Update the config/parameters.yml with the following:

session_handler_dsn:  'redis://127.0.0.1:26379?redis_sentinel=sessions_mon'
redis_dsn_cache:      'redis://127.0.0.1:26379?dbindex=1&redis_sentinel=lru_cache_mon'
redis_dsn_doctrine:   'redis://127.0.0.1:26379?dbindex=2&redis_sentinel=lru_cache_mon'
redis_dsn_layout:     'redis://127.0.0.1:26379?dbindex=3&redis_sentinel=lru_cache_mon'

In this case. it is required to provide redis-sentinel endpoints(urls query parameters) with db numbers for session_handler_dsn, redis_dsn_cache, redis_dsn_doctrine, redis_dsn_layout. The master service name, which is configured in sentinel.conf, needs to be provided in the corresponding DSNs containing parameter in its redis_sentinel query parameter. Also this parameter points that a DSN string configures sentinel connections.

sentinel monitor mymaster 127.0.0.1 2

DSNs redis client parameters can also contain prefer_slave query parameter that are responsible for the selection of a preferable slave node via an IP address, if the cluster has several slaves and you need to connect to a specific one. These parameters can be a string that contains IP address or an array that contains a map with IP addresses of preferable slaves (the array key is the IP address of a Redis client, the array value is the IP address of a preferable slave).

Examples:

session_handler_dsn:  'redis://127.0.0.1:26379?redis_sentinel=sessions_mon&prefer_slave=192.168.10.5'
redis_dsn_cache:      'redis://127.0.0.1:26379?dbindex=1&redis_sentinel=lru_cache_mon&prefer_slave=192.168.10.5'
redis_dsn_doctrine:   'redis://127.0.0.1:26379?dbindex=2&redis_sentinel=lru_cache_mon&prefer_slave=192.168.10.5'
redis_dsn_layout:     'redis://127.0.0.1:26379?dbindex=3&redis_sentinel=lru_cache_mon&prefer_slave=192.168.10.5'

session_handler_dsn:  'redis://127.0.0.1:26379?redis_sentinel=sessions_mon&prefer_slave[192.168.10.1]=192.168.10.5&prefer_slave[192.168.10.2]=192.168.10.5&prefer_slave[192.168.10.3]=192.168.10.6'
redis_dsn_cache:      'redis://127.0.0.1:26379?dbindex=1&redis_sentinel=lru_cache_mon&prefer_slave[192.168.10.1]=192.168.10.5&prefer_slave[192.168.10.2]=192.168.10.5&prefer_slave[192.168.10.3]=192.168.10.6'
redis_dsn_doctrine:   'redis://127.0.0.1:26379?dbindex=2&redis_sentinel=lru_cache_mon&prefer_slave[192.168.10.1]=192.168.10.5&prefer_slave[192.168.10.2]=192.168.10.5&prefer_slave[192.168.10.3]=192.168.10.6'
redis_dsn_layout:     'redis://127.0.0.1:26379?dbindex=3&redis_sentinel=lru_cache_mon&prefer_slave[192.168.10.1]=192.168.10.5&prefer_slave[192.168.10.2]=192.168.10.5&prefer_slave[192.168.10.3]=192.168.10.6'

If you use a map with IP addresses, the server IP address is obtained by calling gethostbyname(gethostname()). If, by some reasons, it is not acceptable, you can define the server_ip_address parameter in the config/parameters.yml and set the IP address of the server there.

Configure a static IP address:

server_ip_address: '192.168.10.1'

Obtain the IP address from an environment variable:

server_ip_address: '%env(SERVER_IP_ADDRESS)%'