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client.go
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client.go
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package redis
import (
"crypto/tls"
"fmt"
"net/url"
"strings"
"github.com/redis/go-redis/v9"
"github.com/benthosdev/benthos/v4/internal/filepath/ifs"
"github.com/benthosdev/benthos/v4/internal/impl/redis/old"
"github.com/benthosdev/benthos/v4/public/service"
)
func clientFields() []*service.ConfigField {
tlsField := service.NewTLSToggledField("tls").
Description(`Custom TLS settings can be used to override system defaults.
**Troubleshooting**
Some cloud hosted instances of Redis (such as Azure Cache) might need some hand holding in order to establish stable connections. Unfortunately, it is often the case that TLS issues will manifest as generic error messages such as "i/o timeout". If you're using TLS and are seeing connectivity problems consider setting ` + "`enable_renegotiation` to `true`" + `, and ensuring that the server supports at least TLS version 1.2.`)
return []*service.ConfigField{
service.NewURLField("url").
Description("The URL of the target Redis server. Database is optional and is supplied as the URL path.").
Example(":6397").
Example("localhost:6397").
Example("redis://localhost:6379").
Example("redis://:foopassword@redisplace:6379").
Example("redis://localhost:6379/1").
Example("redis://localhost:6379/1,redis://localhost:6380/1"),
service.NewStringEnumField("kind", "simple", "cluster", "failover").
Description("Specifies a simple, cluster-aware, or failover-aware redis client.").
Default("simple").
Advanced(),
service.NewStringField("master").
Description("Name of the redis master when `kind` is `failover`").
Default("").
Example("mymaster").
Advanced(),
tlsField,
}
}
func getClient(parsedConf *service.ParsedConfig) (redis.UniversalClient, error) {
urlStr, err := parsedConf.FieldString("url")
if err != nil {
return nil, err
}
kind, err := parsedConf.FieldString("kind")
if err != nil {
return nil, err
}
master, err := parsedConf.FieldString("master")
if err != nil {
return nil, err
}
tlsConf, tlsEnabled, err := parsedConf.FieldTLSToggled("tls")
if err != nil {
return nil, err
}
if !tlsEnabled {
tlsConf = nil
}
// We default to Redis DB 0 for backward compatibility
var redisDB int
var pass string
var addrs []string
// handle comma-separated urls
for _, v := range strings.Split(urlStr, ",") {
url, err := url.Parse(v)
if err != nil {
return nil, err
}
if url.Scheme == "tcp" {
url.Scheme = "redis"
}
rurl, err := redis.ParseURL(url.String())
if err != nil {
return nil, err
}
addrs = append(addrs, rurl.Addr)
redisDB = rurl.DB
pass = rurl.Password
}
var client redis.UniversalClient
opts := &redis.UniversalOptions{
Addrs: addrs,
DB: redisDB,
Password: pass,
TLSConfig: tlsConf,
}
switch kind {
case "simple":
client = redis.NewClient(opts.Simple())
case "cluster":
client = redis.NewClusterClient(opts.Cluster())
case "failover":
opts.MasterName = master
client = redis.NewFailoverClient(opts.Failover())
default:
err = fmt.Errorf("invalid redis kind: %s", kind)
}
return client, err
}
func clientFromConfig(f ifs.FS, r old.Config) (redis.UniversalClient, error) {
// We default to Redis DB 0 for backward compatibility
var redisDB int
var pass string
var addrs []string
// handle comma-separated urls
for _, v := range strings.Split(r.URL, ",") {
url, err := url.Parse(v)
if err != nil {
return nil, err
}
if url.Scheme == "tcp" {
url.Scheme = "redis"
}
rurl, err := redis.ParseURL(url.String())
if err != nil {
return nil, err
}
addrs = append(addrs, rurl.Addr)
redisDB = rurl.DB
pass = rurl.Password
}
var tlsConf *tls.Config
if r.TLS.Enabled {
var err error
if tlsConf, err = r.TLS.Get(f); err != nil {
return nil, err
}
}
var client redis.UniversalClient
var err error
opts := &redis.UniversalOptions{
Addrs: addrs,
DB: redisDB,
Password: pass,
TLSConfig: tlsConf,
}
switch r.Kind {
case "simple":
client = redis.NewClient(opts.Simple())
case "cluster":
client = redis.NewClusterClient(opts.Cluster())
case "failover":
opts.MasterName = r.Master
client = redis.NewFailoverClient(opts.Failover())
default:
err = fmt.Errorf("invalid redis kind: %s", r.Kind)
}
return client, err
}