mirror of
https://github.com/goharbor/harbor.git
synced 2024-09-07 19:48:06 +02:00
902 lines
32 KiB
Diff
902 lines
32 KiB
Diff
diff --git a/configuration/configuration.go b/configuration/configuration.go
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index b347d63b..04cdd230 100644
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--- a/configuration/configuration.go
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+++ b/configuration/configuration.go
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@@ -162,6 +162,9 @@ type Configuration struct {
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// Addr specifies the the redis instance available to the application.
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Addr string `yaml:"addr,omitempty"`
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+ // SentinelMasterSet specifies the the redis sentinel master set name.
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+ SentinelMasterSet string `yaml:"sentinelMasterSet,omitempty"`
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+
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// Password string to use when making a connection.
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Password string `yaml:"password,omitempty"`
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diff --git a/registry/handlers/app.go b/registry/handlers/app.go
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index 978851bb..a8379071 100644
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--- a/registry/handlers/app.go
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+++ b/registry/handlers/app.go
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@@ -3,6 +3,7 @@ package handlers
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import (
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"context"
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cryptorand "crypto/rand"
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+ "errors"
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"expvar"
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"fmt"
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"math/rand"
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@@ -15,6 +16,8 @@ import (
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"strings"
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"time"
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+ "github.com/FZambia/sentinel"
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+
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"github.com/docker/distribution"
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"github.com/docker/distribution/configuration"
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dcontext "github.com/docker/distribution/context"
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@@ -24,7 +27,7 @@ import (
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"github.com/docker/distribution/notifications"
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"github.com/docker/distribution/reference"
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"github.com/docker/distribution/registry/api/errcode"
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- "github.com/docker/distribution/registry/api/v2"
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+ v2 "github.com/docker/distribution/registry/api/v2"
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"github.com/docker/distribution/registry/auth"
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registrymiddleware "github.com/docker/distribution/registry/middleware/registry"
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repositorymiddleware "github.com/docker/distribution/registry/middleware/repository"
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@@ -498,6 +501,44 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
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return
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}
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+ var getRedisAddr func() (string, error)
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+ var testOnBorrow func(c redis.Conn, t time.Time) error
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+ if configuration.Redis.SentinelMasterSet != "" {
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+ sntnl := &sentinel.Sentinel{
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+ Addrs: strings.Split(configuration.Redis.Addr, ","),
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+ MasterName: configuration.Redis.SentinelMasterSet,
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+ Dial: func(addr string) (redis.Conn, error) {
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+ c, err := redis.DialTimeout("tcp", addr,
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+ configuration.Redis.DialTimeout,
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+ configuration.Redis.ReadTimeout,
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+ configuration.Redis.WriteTimeout)
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+ if err != nil {
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+ return nil, err
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+ }
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+ return c, nil
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+ },
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+ }
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+ getRedisAddr = func() (string, error) {
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+ return sntnl.MasterAddr()
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+ }
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+ testOnBorrow = func(c redis.Conn, t time.Time) error {
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+ if !sentinel.TestRole(c, "master") {
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+ return errors.New("role check failed")
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+ }
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+ return nil
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+ }
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+
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+ } else {
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+ getRedisAddr = func() (string, error) {
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+ return configuration.Redis.Addr, nil
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+ }
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+ testOnBorrow = func(c redis.Conn, t time.Time) error {
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+ // TODO(stevvooe): We can probably do something more interesting
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+ // here with the health package.
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+ _, err := c.Do("PING")
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+ return err
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+ }
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+ }
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pool := &redis.Pool{
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Dial: func() (redis.Conn, error) {
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// TODO(stevvooe): Yet another use case for contextual timing.
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@@ -513,8 +554,11 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
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}
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}
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- conn, err := redis.DialTimeout("tcp",
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- configuration.Redis.Addr,
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+ redisAddr, err := getRedisAddr()
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+ if err != nil {
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+ return nil, err
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+ }
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+ conn, err := redis.DialTimeout("tcp", redisAddr,
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configuration.Redis.DialTimeout,
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configuration.Redis.ReadTimeout,
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configuration.Redis.WriteTimeout)
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@@ -546,16 +590,11 @@ func (app *App) configureRedis(configuration *configuration.Configuration) {
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done(nil)
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return conn, nil
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},
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- MaxIdle: configuration.Redis.Pool.MaxIdle,
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- MaxActive: configuration.Redis.Pool.MaxActive,
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- IdleTimeout: configuration.Redis.Pool.IdleTimeout,
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- TestOnBorrow: func(c redis.Conn, t time.Time) error {
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- // TODO(stevvooe): We can probably do something more interesting
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- // here with the health package.
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- _, err := c.Do("PING")
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- return err
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- },
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- Wait: false, // if a connection is not available, proceed without cache.
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+ MaxIdle: configuration.Redis.Pool.MaxIdle,
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+ MaxActive: configuration.Redis.Pool.MaxActive,
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+ IdleTimeout: configuration.Redis.Pool.IdleTimeout,
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+ TestOnBorrow: testOnBorrow,
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+ Wait: false, // if a connection is not available, proceed without cache.
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}
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app.redis = pool
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diff --git a/registry/handlers/app_test.go b/registry/handlers/app_test.go
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index 12c0b61c..8a644d83 100644
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--- a/registry/handlers/app_test.go
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+++ b/registry/handlers/app_test.go
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@@ -11,7 +11,7 @@ import (
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"github.com/docker/distribution/configuration"
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"github.com/docker/distribution/context"
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"github.com/docker/distribution/registry/api/errcode"
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- "github.com/docker/distribution/registry/api/v2"
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+ v2 "github.com/docker/distribution/registry/api/v2"
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"github.com/docker/distribution/registry/auth"
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_ "github.com/docker/distribution/registry/auth/silly"
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"github.com/docker/distribution/registry/storage"
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@@ -140,7 +140,29 @@ func TestAppDispatcher(t *testing.T) {
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// TestNewApp covers the creation of an application via NewApp with a
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// configuration.
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func TestNewApp(t *testing.T) {
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- ctx := context.Background()
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+
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+ config := configuration.Configuration{
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+ Storage: configuration.Storage{
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+ "testdriver": nil,
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+ "maintenance": configuration.Parameters{"uploadpurging": map[interface{}]interface{}{
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+ "enabled": false,
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+ }},
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+ },
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+ Auth: configuration.Auth{
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+ // For now, we simply test that new auth results in a viable
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+ // application.
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+ "silly": {
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+ "realm": "realm-test",
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+ "service": "service-test",
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+ },
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+ },
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+ }
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+ runAppWithConfig(t, config)
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+}
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+
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+// TestNewApp covers the creation of an application via NewApp with a
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+// configuration(with redis).
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+func TestNewAppWithRedis(t *testing.T) {
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config := configuration.Configuration{
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Storage: configuration.Storage{
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"testdriver": nil,
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@@ -157,7 +179,38 @@ func TestNewApp(t *testing.T) {
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},
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},
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}
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+ config.Redis.Addr = "127.0.0.1:6379"
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+ config.Redis.DB = 0
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+ runAppWithConfig(t, config)
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+}
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+// TestNewApp covers the creation of an application via NewApp with a
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+// configuration(with redis sentinel cluster).
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+func TestNewAppWithRedisSentinelCluster(t *testing.T) {
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+ config := configuration.Configuration{
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+ Storage: configuration.Storage{
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+ "testdriver": nil,
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+ "maintenance": configuration.Parameters{"uploadpurging": map[interface{}]interface{}{
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+ "enabled": false,
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+ }},
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+ },
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+ Auth: configuration.Auth{
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+ // For now, we simply test that new auth results in a viable
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+ // application.
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+ "silly": {
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+ "realm": "realm-test",
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+ "service": "service-test",
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+ },
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+ },
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+ }
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+ config.Redis.Addr = "192.168.0.11:26379,192.168.0.12:26379"
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+ config.Redis.DB = 0
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+ config.Redis.SentinelMasterSet = "mymaster"
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+ runAppWithConfig(t, config)
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+}
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+
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+func runAppWithConfig(t *testing.T, config configuration.Configuration) {
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+ ctx := context.Background()
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// Mostly, with this test, given a sane configuration, we are simply
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// ensuring that NewApp doesn't panic. We might want to tweak this
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// behavior.
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diff --git a/vendor.conf b/vendor.conf
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index a249caf2..fcc9fee2 100644
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--- a/vendor.conf
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+++ b/vendor.conf
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@@ -49,3 +49,4 @@ gopkg.in/yaml.v2 v2.2.1
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rsc.io/letsencrypt e770c10b0f1a64775ae91d240407ce00d1a5bdeb https://github.com/dmcgowan/letsencrypt.git
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github.com/opencontainers/go-digest a6d0ee40d4207ea02364bd3b9e8e77b9159ba1eb
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github.com/opencontainers/image-spec ab7389ef9f50030c9b245bc16b981c7ddf192882
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+github.com/FZambia/sentinel 5585739eb4b6478aa30161866ccf9ce0ef5847c7 https://github.com/jeremyxu2010/sentinel.git
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diff --git a/vendor/github.com/FZambia/sentinel/LICENSE b/vendor/github.com/FZambia/sentinel/LICENSE
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new file mode 100644
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index 00000000..8dada3ed
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--- /dev/null
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+++ b/vendor/github.com/FZambia/sentinel/LICENSE
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@@ -0,0 +1,201 @@
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+ Apache License
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+ Version 2.0, January 2004
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+ http://www.apache.org/licenses/
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+
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+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+
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+ 1. Definitions.
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diff --git a/vendor/github.com/FZambia/sentinel/README.md b/vendor/github.com/FZambia/sentinel/README.md
|
|
new file mode 100644
|
|
index 00000000..f544c54e
|
|
--- /dev/null
|
|
+++ b/vendor/github.com/FZambia/sentinel/README.md
|
|
@@ -0,0 +1,39 @@
|
|
+go-sentinel
|
|
+===========
|
|
+
|
|
+Redis Sentinel support for [redigo](https://github.com/gomodule/redigo) library.
|
|
+
|
|
+Documentation
|
|
+-------------
|
|
+
|
|
+- [API Reference](http://godoc.org/github.com/FZambia/sentinel)
|
|
+
|
|
+Alternative solution
|
|
+--------------------
|
|
+
|
|
+You can alternatively configure Haproxy between your application and Redis to proxy requests to Redis master instance if you only need HA:
|
|
+
|
|
+```
|
|
+listen redis
|
|
+ server redis-01 127.0.0.1:6380 check port 6380 check inter 2s weight 1 inter 2s downinter 5s rise 10 fall 2
|
|
+ server redis-02 127.0.0.1:6381 check port 6381 check inter 2s weight 1 inter 2s downinter 5s rise 10 fall 2 backup
|
|
+ bind *:6379
|
|
+ mode tcp
|
|
+ option tcpka
|
|
+ option tcplog
|
|
+ option tcp-check
|
|
+ tcp-check send PING\r\n
|
|
+ tcp-check expect string +PONG
|
|
+ tcp-check send info\ replication\r\n
|
|
+ tcp-check expect string role:master
|
|
+ tcp-check send QUIT\r\n
|
|
+ tcp-check expect string +OK
|
|
+ balance roundrobin
|
|
+```
|
|
+
|
|
+This way you don't need to use this library.
|
|
+
|
|
+License
|
|
+-------
|
|
+
|
|
+Library is available under the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html).
|
|
diff --git a/vendor/github.com/FZambia/sentinel/sentinel.go b/vendor/github.com/FZambia/sentinel/sentinel.go
|
|
new file mode 100644
|
|
index 00000000..79209e9f
|
|
--- /dev/null
|
|
+++ b/vendor/github.com/FZambia/sentinel/sentinel.go
|
|
@@ -0,0 +1,426 @@
|
|
+package sentinel
|
|
+
|
|
+import (
|
|
+ "errors"
|
|
+ "fmt"
|
|
+ "net"
|
|
+ "strings"
|
|
+ "sync"
|
|
+ "time"
|
|
+
|
|
+ "github.com/garyburd/redigo/redis"
|
|
+)
|
|
+
|
|
+// Sentinel provides a way to add high availability (HA) to Redis Pool using
|
|
+// preconfigured addresses of Sentinel servers and name of master which Sentinels
|
|
+// monitor. It works with Redis >= 2.8.12 (mostly because of ROLE command that
|
|
+// was introduced in that version, it's possible though to support old versions
|
|
+// using INFO command).
|
|
+//
|
|
+// Example of the simplest usage to contact master "mymaster":
|
|
+//
|
|
+// func newSentinelPool() *redis.Pool {
|
|
+// sntnl := &sentinel.Sentinel{
|
|
+// Addrs: []string{":26379", ":26380", ":26381"},
|
|
+// MasterName: "mymaster",
|
|
+// Dial: func(addr string) (redis.Conn, error) {
|
|
+// timeout := 500 * time.Millisecond
|
|
+// c, err := redis.DialTimeout("tcp", addr, timeout, timeout, timeout)
|
|
+// if err != nil {
|
|
+// return nil, err
|
|
+// }
|
|
+// return c, nil
|
|
+// },
|
|
+// }
|
|
+// return &redis.Pool{
|
|
+// MaxIdle: 3,
|
|
+// MaxActive: 64,
|
|
+// Wait: true,
|
|
+// IdleTimeout: 240 * time.Second,
|
|
+// Dial: func() (redis.Conn, error) {
|
|
+// masterAddr, err := sntnl.MasterAddr()
|
|
+// if err != nil {
|
|
+// return nil, err
|
|
+// }
|
|
+// c, err := redis.Dial("tcp", masterAddr)
|
|
+// if err != nil {
|
|
+// return nil, err
|
|
+// }
|
|
+// return c, nil
|
|
+// },
|
|
+// TestOnBorrow: func(c redis.Conn, t time.Time) error {
|
|
+// if !sentinel.TestRole(c, "master") {
|
|
+// return errors.New("Role check failed")
|
|
+// } else {
|
|
+// return nil
|
|
+// }
|
|
+// },
|
|
+// }
|
|
+// }
|
|
+type Sentinel struct {
|
|
+ // Addrs is a slice with known Sentinel addresses.
|
|
+ Addrs []string
|
|
+
|
|
+ // MasterName is a name of Redis master Sentinel servers monitor.
|
|
+ MasterName string
|
|
+
|
|
+ // Dial is a user supplied function to connect to Sentinel on given address. This
|
|
+ // address will be chosen from Addrs slice.
|
|
+ // Note that as per the redis-sentinel client guidelines, a timeout is mandatory
|
|
+ // while connecting to Sentinels, and should not be set to 0.
|
|
+ Dial func(addr string) (redis.Conn, error)
|
|
+
|
|
+ // Pool is a user supplied function returning custom connection pool to Sentinel.
|
|
+ // This can be useful to tune options if you are not satisfied with what default
|
|
+ // Sentinel pool offers. See defaultPool() method for default pool implementation.
|
|
+ // In most cases you only need to provide Dial function and let this be nil.
|
|
+ Pool func(addr string) *redis.Pool
|
|
+
|
|
+ mu sync.RWMutex
|
|
+ pools map[string]*redis.Pool
|
|
+ addr string
|
|
+}
|
|
+
|
|
+// NoSentinelsAvailable is returned when all sentinels in the list are exhausted
|
|
+// (or none configured), and contains the last error returned by Dial (which
|
|
+// may be nil)
|
|
+type NoSentinelsAvailable struct {
|
|
+ lastError error
|
|
+}
|
|
+
|
|
+func (ns NoSentinelsAvailable) Error() string {
|
|
+ if ns.lastError != nil {
|
|
+ return fmt.Sprintf("redigo: no sentinels available; last error: %s", ns.lastError.Error())
|
|
+ }
|
|
+ return fmt.Sprintf("redigo: no sentinels available")
|
|
+}
|
|
+
|
|
+// putToTop puts Sentinel address to the top of address list - this means
|
|
+// that all next requests will use Sentinel on this address first.
|
|
+//
|
|
+// From Sentinel guidelines:
|
|
+//
|
|
+// The first Sentinel replying to the client request should be put at the
|
|
+// start of the list, so that at the next reconnection, we'll try first
|
|
+// the Sentinel that was reachable in the previous connection attempt,
|
|
+// minimizing latency.
|
|
+//
|
|
+// Lock must be held by caller.
|
|
+func (s *Sentinel) putToTop(addr string) {
|
|
+ addrs := s.Addrs
|
|
+ if addrs[0] == addr {
|
|
+ // Already on top.
|
|
+ return
|
|
+ }
|
|
+ newAddrs := []string{addr}
|
|
+ for _, a := range addrs {
|
|
+ if a == addr {
|
|
+ continue
|
|
+ }
|
|
+ newAddrs = append(newAddrs, a)
|
|
+ }
|
|
+ s.Addrs = newAddrs
|
|
+}
|
|
+
|
|
+// putToBottom puts Sentinel address to the bottom of address list.
|
|
+// We call this method internally when see that some Sentinel failed to answer
|
|
+// on application request so next time we start with another one.
|
|
+//
|
|
+// Lock must be held by caller.
|
|
+func (s *Sentinel) putToBottom(addr string) {
|
|
+ addrs := s.Addrs
|
|
+ if addrs[len(addrs)-1] == addr {
|
|
+ // Already on bottom.
|
|
+ return
|
|
+ }
|
|
+ newAddrs := []string{}
|
|
+ for _, a := range addrs {
|
|
+ if a == addr {
|
|
+ continue
|
|
+ }
|
|
+ newAddrs = append(newAddrs, a)
|
|
+ }
|
|
+ newAddrs = append(newAddrs, addr)
|
|
+ s.Addrs = newAddrs
|
|
+}
|
|
+
|
|
+// defaultPool returns a connection pool to one Sentinel. This allows
|
|
+// us to call concurrent requests to Sentinel using connection Do method.
|
|
+func (s *Sentinel) defaultPool(addr string) *redis.Pool {
|
|
+ return &redis.Pool{
|
|
+ MaxIdle: 3,
|
|
+ MaxActive: 10,
|
|
+ Wait: true,
|
|
+ IdleTimeout: 240 * time.Second,
|
|
+ Dial: func() (redis.Conn, error) {
|
|
+ return s.Dial(addr)
|
|
+ },
|
|
+ TestOnBorrow: func(c redis.Conn, t time.Time) error {
|
|
+ _, err := c.Do("PING")
|
|
+ return err
|
|
+ },
|
|
+ }
|
|
+}
|
|
+
|
|
+func (s *Sentinel) get(addr string) redis.Conn {
|
|
+ pool := s.poolForAddr(addr)
|
|
+ return pool.Get()
|
|
+}
|
|
+
|
|
+func (s *Sentinel) poolForAddr(addr string) *redis.Pool {
|
|
+ s.mu.Lock()
|
|
+ if s.pools == nil {
|
|
+ s.pools = make(map[string]*redis.Pool)
|
|
+ }
|
|
+ pool, ok := s.pools[addr]
|
|
+ if ok {
|
|
+ s.mu.Unlock()
|
|
+ return pool
|
|
+ }
|
|
+ s.mu.Unlock()
|
|
+ newPool := s.newPool(addr)
|
|
+ s.mu.Lock()
|
|
+ p, ok := s.pools[addr]
|
|
+ if ok {
|
|
+ s.mu.Unlock()
|
|
+ return p
|
|
+ }
|
|
+ s.pools[addr] = newPool
|
|
+ s.mu.Unlock()
|
|
+ return newPool
|
|
+}
|
|
+
|
|
+func (s *Sentinel) newPool(addr string) *redis.Pool {
|
|
+ if s.Pool != nil {
|
|
+ return s.Pool(addr)
|
|
+ }
|
|
+ return s.defaultPool(addr)
|
|
+}
|
|
+
|
|
+// close connection pool to Sentinel.
|
|
+// Lock must be hold by caller.
|
|
+func (s *Sentinel) close() {
|
|
+ if s.pools != nil {
|
|
+ for _, pool := range s.pools {
|
|
+ pool.Close()
|
|
+ }
|
|
+ }
|
|
+ s.pools = nil
|
|
+}
|
|
+
|
|
+func (s *Sentinel) doUntilSuccess(f func(redis.Conn) (interface{}, error)) (interface{}, error) {
|
|
+ s.mu.RLock()
|
|
+ addrs := s.Addrs
|
|
+ s.mu.RUnlock()
|
|
+
|
|
+ var lastErr error
|
|
+
|
|
+ for _, addr := range addrs {
|
|
+ conn := s.get(addr)
|
|
+ reply, err := f(conn)
|
|
+ conn.Close()
|
|
+ if err != nil {
|
|
+ lastErr = err
|
|
+ s.mu.Lock()
|
|
+ pool, ok := s.pools[addr]
|
|
+ if ok {
|
|
+ pool.Close()
|
|
+ delete(s.pools, addr)
|
|
+ }
|
|
+ s.putToBottom(addr)
|
|
+ s.mu.Unlock()
|
|
+ continue
|
|
+ }
|
|
+ s.putToTop(addr)
|
|
+ return reply, nil
|
|
+ }
|
|
+
|
|
+ return nil, NoSentinelsAvailable{lastError: lastErr}
|
|
+}
|
|
+
|
|
+// MasterAddr returns an address of current Redis master instance.
|
|
+func (s *Sentinel) MasterAddr() (string, error) {
|
|
+ res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
|
|
+ return queryForMaster(c, s.MasterName)
|
|
+ })
|
|
+ if err != nil {
|
|
+ return "", err
|
|
+ }
|
|
+ return res.(string), nil
|
|
+}
|
|
+
|
|
+// SlaveAddrs returns a slice with known slave addresses of current master instance.
|
|
+func (s *Sentinel) SlaveAddrs() ([]string, error) {
|
|
+ res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
|
|
+ return queryForSlaveAddrs(c, s.MasterName)
|
|
+ })
|
|
+ if err != nil {
|
|
+ return nil, err
|
|
+ }
|
|
+ return res.([]string), nil
|
|
+}
|
|
+
|
|
+// Slave represents a Redis slave instance which is known by Sentinel.
|
|
+type Slave struct {
|
|
+ ip string
|
|
+ port string
|
|
+ flags string
|
|
+}
|
|
+
|
|
+// Addr returns an address of slave.
|
|
+func (s *Slave) Addr() string {
|
|
+ return net.JoinHostPort(s.ip, s.port)
|
|
+}
|
|
+
|
|
+// Available returns if slave is in working state at moment based on information in slave flags.
|
|
+func (s *Slave) Available() bool {
|
|
+ return !strings.Contains(s.flags, "disconnected") && !strings.Contains(s.flags, "s_down")
|
|
+}
|
|
+
|
|
+// Slaves returns a slice with known slaves of master instance.
|
|
+func (s *Sentinel) Slaves() ([]*Slave, error) {
|
|
+ res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
|
|
+ return queryForSlaves(c, s.MasterName)
|
|
+ })
|
|
+ if err != nil {
|
|
+ return nil, err
|
|
+ }
|
|
+ return res.([]*Slave), nil
|
|
+}
|
|
+
|
|
+// SentinelAddrs returns a slice of known Sentinel addresses Sentinel server aware of.
|
|
+func (s *Sentinel) SentinelAddrs() ([]string, error) {
|
|
+ res, err := s.doUntilSuccess(func(c redis.Conn) (interface{}, error) {
|
|
+ return queryForSentinels(c, s.MasterName)
|
|
+ })
|
|
+ if err != nil {
|
|
+ return nil, err
|
|
+ }
|
|
+ return res.([]string), nil
|
|
+}
|
|
+
|
|
+// Discover allows to update list of known Sentinel addresses. From docs:
|
|
+//
|
|
+// A client may update its internal list of Sentinel nodes following this procedure:
|
|
+// 1) Obtain a list of other Sentinels for this master using the command SENTINEL sentinels <master-name>.
|
|
+// 2) Add every ip:port pair not already existing in our list at the end of the list.
|
|
+func (s *Sentinel) Discover() error {
|
|
+ addrs, err := s.SentinelAddrs()
|
|
+ if err != nil {
|
|
+ return err
|
|
+ }
|
|
+ s.mu.Lock()
|
|
+ for _, addr := range addrs {
|
|
+ if !stringInSlice(addr, s.Addrs) {
|
|
+ s.Addrs = append(s.Addrs, addr)
|
|
+ }
|
|
+ }
|
|
+ s.mu.Unlock()
|
|
+ return nil
|
|
+}
|
|
+
|
|
+// Close closes current connection to Sentinel.
|
|
+func (s *Sentinel) Close() error {
|
|
+ s.mu.Lock()
|
|
+ s.close()
|
|
+ s.mu.Unlock()
|
|
+ return nil
|
|
+}
|
|
+
|
|
+// TestRole wraps GetRole in a test to verify if the role matches an expected
|
|
+// role string. If there was any error in querying the supplied connection,
|
|
+// the function returns false. Works with Redis >= 2.8.12.
|
|
+// It's not goroutine safe, but if you call this method on pooled connections
|
|
+// then you are OK.
|
|
+func TestRole(c redis.Conn, expectedRole string) bool {
|
|
+ role, err := getRole(c)
|
|
+ if err != nil || role != expectedRole {
|
|
+ return false
|
|
+ }
|
|
+ return true
|
|
+}
|
|
+
|
|
+// getRole is a convenience function supplied to query an instance (master or
|
|
+// slave) for its role. It attempts to use the ROLE command introduced in
|
|
+// redis 2.8.12.
|
|
+func getRole(c redis.Conn) (string, error) {
|
|
+ res, err := c.Do("ROLE")
|
|
+ if err != nil {
|
|
+ return "", err
|
|
+ }
|
|
+ rres, ok := res.([]interface{})
|
|
+ if ok {
|
|
+ return redis.String(rres[0], nil)
|
|
+ }
|
|
+ return "", errors.New("redigo: can not transform ROLE reply to string")
|
|
+}
|
|
+
|
|
+func queryForMaster(conn redis.Conn, masterName string) (string, error) {
|
|
+ res, err := redis.Strings(conn.Do("SENTINEL", "get-master-addr-by-name", masterName))
|
|
+ if err != nil {
|
|
+ return "", err
|
|
+ }
|
|
+ if len(res) < 2 {
|
|
+ return "", errors.New("redigo: malformed get-master-addr-by-name reply")
|
|
+ }
|
|
+ masterAddr := net.JoinHostPort(res[0], res[1])
|
|
+ return masterAddr, nil
|
|
+}
|
|
+
|
|
+func queryForSlaveAddrs(conn redis.Conn, masterName string) ([]string, error) {
|
|
+ slaves, err := queryForSlaves(conn, masterName)
|
|
+ if err != nil {
|
|
+ return nil, err
|
|
+ }
|
|
+ slaveAddrs := make([]string, 0)
|
|
+ for _, slave := range slaves {
|
|
+ slaveAddrs = append(slaveAddrs, slave.Addr())
|
|
+ }
|
|
+ return slaveAddrs, nil
|
|
+}
|
|
+
|
|
+func queryForSlaves(conn redis.Conn, masterName string) ([]*Slave, error) {
|
|
+ res, err := redis.Values(conn.Do("SENTINEL", "slaves", masterName))
|
|
+ if err != nil {
|
|
+ return nil, err
|
|
+ }
|
|
+ slaves := make([]*Slave, 0)
|
|
+ for _, a := range res {
|
|
+ sm, err := redis.StringMap(a, err)
|
|
+ if err != nil {
|
|
+ return slaves, err
|
|
+ }
|
|
+ slave := &Slave{
|
|
+ ip: sm["ip"],
|
|
+ port: sm["port"],
|
|
+ flags: sm["flags"],
|
|
+ }
|
|
+ slaves = append(slaves, slave)
|
|
+ }
|
|
+ return slaves, nil
|
|
+}
|
|
+
|
|
+func queryForSentinels(conn redis.Conn, masterName string) ([]string, error) {
|
|
+ res, err := redis.Values(conn.Do("SENTINEL", "sentinels", masterName))
|
|
+ if err != nil {
|
|
+ return nil, err
|
|
+ }
|
|
+ sentinels := make([]string, 0)
|
|
+ for _, a := range res {
|
|
+ sm, err := redis.StringMap(a, err)
|
|
+ if err != nil {
|
|
+ return sentinels, err
|
|
+ }
|
|
+ sentinels = append(sentinels, fmt.Sprintf("%s:%s", sm["ip"], sm["port"]))
|
|
+ }
|
|
+ return sentinels, nil
|
|
+}
|
|
+
|
|
+func stringInSlice(str string, slice []string) bool {
|
|
+ for _, s := range slice {
|
|
+ if s == str {
|
|
+ return true
|
|
+ }
|
|
+ }
|
|
+ return false
|
|
+}
|