84 lines
4.3 KiB
Go
84 lines
4.3 KiB
Go
package redis
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import (
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"context"
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"errors"
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"fmt"
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"github.com/kvtools/redis"
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"github.com/traefik/traefik/v2/pkg/provider"
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"github.com/traefik/traefik/v2/pkg/provider/kv"
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"github.com/traefik/traefik/v2/pkg/types"
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)
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var _ provider.Provider = (*Provider)(nil)
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// Provider holds configurations of the provider.
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type Provider struct {
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kv.Provider `yaml:",inline" export:"true"`
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TLS *types.ClientTLS `description:"Enable TLS support." json:"tls,omitempty" toml:"tls,omitempty" yaml:"tls,omitempty" export:"true"`
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Username string `description:"Username for authentication." json:"username,omitempty" toml:"username,omitempty" yaml:"username,omitempty" loggable:"false"`
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Password string `description:"Password for authentication." json:"password,omitempty" toml:"password,omitempty" yaml:"password,omitempty" loggable:"false"`
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DB int `description:"Database to be selected after connecting to the server." json:"db,omitempty" toml:"db,omitempty" yaml:"db,omitempty"`
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Sentinel *Sentinel `description:"Enable Sentinel support." json:"sentinel,omitempty" toml:"sentinel,omitempty" yaml:"sentinel,omitempty"`
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}
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// Sentinel holds the Redis Sentinel configuration.
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type Sentinel struct {
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MasterName string `description:"Name of the master." json:"masterName,omitempty" toml:"masterName,omitempty" yaml:"masterName,omitempty" export:"true"`
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Username string `description:"Username for Sentinel authentication." json:"username,omitempty" toml:"username,omitempty" yaml:"username,omitempty" export:"true"`
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Password string `description:"Password for Sentinel authentication." json:"password,omitempty" toml:"password,omitempty" yaml:"password,omitempty" export:"true"`
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LatencyStrategy bool `description:"Defines whether to route commands to the closest master or replica nodes (mutually exclusive with RandomStrategy and ReplicaStrategy)." json:"latencyStrategy,omitempty" toml:"latencyStrategy,omitempty" yaml:"latencyStrategy,omitempty" export:"true"`
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RandomStrategy bool `description:"Defines whether to route commands randomly to master or replica nodes (mutually exclusive with LatencyStrategy and ReplicaStrategy)." json:"randomStrategy,omitempty" toml:"randomStrategy,omitempty" yaml:"randomStrategy,omitempty" export:"true"`
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ReplicaStrategy bool `description:"Defines whether to route all commands to replica nodes (mutually exclusive with LatencyStrategy and RandomStrategy)." json:"replicaStrategy,omitempty" toml:"replicaStrategy,omitempty" yaml:"replicaStrategy,omitempty" export:"true"`
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UseDisconnectedReplicas bool `description:"Use replicas disconnected with master when cannot get connected replicas." json:"useDisconnectedReplicas,omitempty" toml:"useDisconnectedReplicas,omitempty" yaml:"useDisconnectedReplicas,omitempty" export:"true"`
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}
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// SetDefaults sets the default values.
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func (p *Provider) SetDefaults() {
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p.Provider.SetDefaults()
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p.Endpoints = []string{"127.0.0.1:6379"}
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}
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// Init the provider.
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func (p *Provider) Init() error {
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config := &redis.Config{
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Username: p.Username,
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Password: p.Password,
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DB: p.DB,
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}
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if p.TLS != nil {
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var err error
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config.TLS, err = p.TLS.CreateTLSConfig(context.Background())
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if err != nil {
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return fmt.Errorf("unable to create client TLS configuration: %w", err)
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}
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}
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if p.Sentinel != nil {
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switch {
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case p.Sentinel.LatencyStrategy && !(p.Sentinel.RandomStrategy || p.Sentinel.ReplicaStrategy):
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case p.Sentinel.RandomStrategy && !(p.Sentinel.LatencyStrategy || p.Sentinel.ReplicaStrategy):
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case p.Sentinel.ReplicaStrategy && !(p.Sentinel.RandomStrategy || p.Sentinel.LatencyStrategy):
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return errors.New("latencyStrategy, randomStrategy and replicaStrategy options are mutually exclusive, please use only one of those options")
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}
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clusterClient := p.Sentinel.LatencyStrategy || p.Sentinel.RandomStrategy
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config.Sentinel = &redis.Sentinel{
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MasterName: p.Sentinel.MasterName,
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Username: p.Sentinel.Username,
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Password: p.Sentinel.Password,
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ClusterClient: clusterClient,
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RouteByLatency: p.Sentinel.LatencyStrategy,
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RouteRandomly: p.Sentinel.RandomStrategy,
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ReplicaOnly: p.Sentinel.ReplicaStrategy,
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UseDisconnectedReplicas: p.Sentinel.UseDisconnectedReplicas,
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}
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}
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return p.Provider.Init(redis.StoreName, "redis", config)
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}
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