mirror of
https://github.com/netbirdio/netbird.git
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69 lines
2.3 KiB
Go
69 lines
2.3 KiB
Go
package cache
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import (
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"context"
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"fmt"
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"math"
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"os"
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"time"
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"github.com/eko/gocache/lib/v4/store"
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gocache_store "github.com/eko/gocache/store/go_cache/v4"
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redis_store "github.com/eko/gocache/store/redis/v4"
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gocache "github.com/patrickmn/go-cache"
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"github.com/redis/go-redis/v9"
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log "github.com/sirupsen/logrus"
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)
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// RedisStoreEnvVar is the environment variable that determines if a redis store should be used.
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// The value should follow redis URL format. https://github.com/redis/redis-specifications/blob/master/uri/redis.txt
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const RedisStoreEnvVar = "NB_CACHE_REDIS_ADDRESS"
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// legacyIdPCacheRedisEnvVar is the previous environment variable used for IDP cache.
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const legacyIdPCacheRedisEnvVar = "NB_IDP_CACHE_REDIS_ADDRESS"
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// NewStore creates a new cache store with the given max timeout and cleanup interval. It checks for the environment Variable RedisStoreEnvVar
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// to determine if a redis store should be used. If the environment variable is set, it will attempt to connect to the redis store.
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func NewStore(ctx context.Context, maxTimeout, cleanupInterval time.Duration, maxConn int) (store.StoreInterface, error) {
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redisAddr := getAddrFromEnv()
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if redisAddr != "" {
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return getRedisStore(ctx, redisAddr, maxConn)
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}
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goc := gocache.New(maxTimeout, cleanupInterval)
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return gocache_store.NewGoCache(goc), nil
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}
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func getAddrFromEnv() string {
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addr := os.Getenv(RedisStoreEnvVar)
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if addr == "" {
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addr = os.Getenv(legacyIdPCacheRedisEnvVar)
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}
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return addr
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}
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func getRedisStore(ctx context.Context, redisEnvAddr string, maxConn int) (store.StoreInterface, error) {
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options, err := redis.ParseURL(redisEnvAddr)
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if err != nil {
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return nil, fmt.Errorf("parsing redis cache url: %s", err)
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}
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options.MaxIdleConns = int(math.Ceil(float64(maxConn) * 0.5)) // 50% of max conns
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options.MinIdleConns = int(math.Ceil(float64(maxConn) * 0.1)) // 10% of max conns
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options.MaxActiveConns = maxConn
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options.ConnMaxIdleTime = 30 * time.Minute
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options.ConnMaxLifetime = 0
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options.PoolTimeout = 10 * time.Second
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redisClient := redis.NewClient(options)
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subCtx, cancel := context.WithTimeout(ctx, 2*time.Second)
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defer cancel()
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_, err = redisClient.Ping(subCtx).Result()
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if err != nil {
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return nil, err
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}
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log.WithContext(subCtx).Infof("using redis cache at %s", redisEnvAddr)
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return redis_store.NewRedis(redisClient), nil
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}
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