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redis.go
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redis.go
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package checks
import (
"context"
"fmt"
"strings"
redis "github.com/go-redis/redis"
)
// Config is the Redis checker configuration settings container.
type RedisCheck struct {
Ctx context.Context
ConnectionString string
Error error
}
func NewRedisCheck(ctx context.Context, connectionString string) RedisCheck {
return RedisCheck{
Ctx: ctx,
ConnectionString: connectionString,
Error: nil,
}
}
func CheckRedisStatus(ctx context.Context, connectionString string) error {
check := NewRedisCheck(ctx, connectionString)
return check.CheckStatus()
}
func (check RedisCheck) CheckStatus() error {
// support all DSN formats (for backward compatibility) - with and w/out schema and path part:
// - redis://localhost:1234/
// - rediss://localhost:1234/
// - localhost:1234
redisDSN := check.ConnectionString
if !strings.HasPrefix(redisDSN, "redis://") && !strings.HasPrefix(redisDSN, "rediss://") {
redisDSN = fmt.Sprintf("redis://%s", redisDSN)
}
redisOptions, _ := redis.ParseURL(redisDSN)
//ctx := check.Ctx
rdb := redis.NewClient(redisOptions)
defer rdb.Close()
pong, err := rdb.Ping().Result()
if err != nil {
check.Error = fmt.Errorf("redis ping failed: %w", err)
return check.Error
}
if pong != "PONG" {
check.Error = fmt.Errorf("unexpected response for redis ping: %q", pong)
return check.Error
}
return nil
}