Nacos-sdk-go 中文
Nacos-sdk-go for Go client allows you to access Nacos service,it supports service discovery and dynamic configuration.
Supported Go version over 1.15
Supported Nacos version over 2.x
Use go get to install SDK：
$ go get -u github.com/nacos-group/nacos-sdk-go/v2- ClientConfig
constant.ClientConfig {
TimeoutMs uint64 // timeout for requesting Nacos server, default value is 10000ms
NamespaceId string // the namespaceId of Nacos
Endpoint string // the endpoint for ACM. https://help.aliyun.com/document_detail/130146.html
RegionId string // the regionId for ACM & KMS
AccessKey string // the AccessKey for ACM & KMS
SecretKey string // the SecretKey for ACM & KMS
OpenKMS bool // it's to open KMS, default is false. https://help.aliyun.com/product/28933.html
// , to enable encrypt/decrypt, DataId should be start with "cipher-"
CacheDir string // the directory for persist nacos service info,default value is current path
UpdateThreadNum int // the number of goroutine for update nacos service info,default value is 20
NotLoadCacheAtStart bool // not to load persistent nacos service info in CacheDir at start time
UpdateCacheWhenEmpty bool // update cache when get empty service instance from server
Username string // the username for nacos auth
Password string // the password for nacos auth
LogDir string // the directory for log, default is current path
RotateTime string // the rotate time for log, eg: 30m, 1h, 24h, default is 24h
MaxAge int64 // the max age of a log file, default value is 3
LogLevel string // the level of log, it's must be debug,info,warn,error, default value is info
}- ServerConfig
constant.ServerConfig{
Scheme string // the nacos server scheme,defaut=http,this is not required in 2.0
ContextPath string // the nacos server contextpath,defaut=/nacos,this is not required in 2.0
IpAddr string // the nacos server address
Port uint64 // nacos server port
GrpcPort uint64 // nacos server grpc port, default=server port + 1000, this is not required
}Note：We can config multiple ServerConfig,the client will rotate request the servers
//create clientConfig
clientConfig := constant.ClientConfig{
NamespaceId: "e525eafa-f7d7-4029-83d9-008937f9d468", //we can create multiple clients with different namespaceId to support multiple namespace.When namespace is public, fill in the blank string here.
TimeoutMs: 5000,
NotLoadCacheAtStart: true,
LogDir: "/tmp/nacos/log",
CacheDir: "/tmp/nacos/cache",
LogLevel: "debug",
}
//Another way of create clientConfig
clientConfig := *constant.NewClientConfig(
constant.WithNamespaceId("e525eafa-f7d7-4029-83d9-008937f9d468"), //When namespace is public, fill in the blank string here.
constant.WithTimeoutMs(5000),
constant.WithNotLoadCacheAtStart(true),
constant.WithLogDir("/tmp/nacos/log"),
constant.WithCacheDir("/tmp/nacos/cache"),
constant.WithLogLevel("debug"),
)
// At least one ServerConfig
serverConfigs := []constant.ServerConfig{
{
IpAddr: "console1.nacos.io",
ContextPath: "/nacos",
Port: 80,
Scheme: "http",
},
{
IpAddr: "console2.nacos.io",
ContextPath: "/nacos",
Port: 80,
Scheme: "http",
},
}
//Another way of create serverConfigs
serverConfigs := []constant.ServerConfig{
*constant.NewServerConfig(
"console1.nacos.io",
80,
constant.WithScheme("http"),
constant.WithContextPath("/nacos")
),
*constant.NewServerConfig(
"console2.nacos.io",
80,
constant.WithScheme("http"),
constant.WithContextPath("/nacos")
),
}
// Create naming client for service discovery
_, _ := clients.CreateNamingClient(map[string]interface{}{
"serverConfigs": serverConfigs,
"clientConfig": clientConfig,
})
// Create config client for dynamic configuration
_, _ := clients.CreateConfigClient(map[string]interface{}{
"serverConfigs": serverConfigs,
"clientConfig": clientConfig,
})
// Another way of create naming client for service discovery (recommend)
namingClient, err := clients.NewNamingClient(
vo.NacosClientParam{
ClientConfig: &clientConfig,
ServerConfigs: serverConfigs,
},
)
// Another way of create config client for dynamic configuration (recommend)
configClient, err := clients.NewConfigClient(
vo.NacosClientParam{
ClientConfig: &clientConfig,
ServerConfigs: serverConfigs,
},
)https://help.aliyun.com/document_detail/130146.html
cc := constant.ClientConfig{
Endpoint: "acm.aliyun.com:8080",
NamespaceId: "e525eafa-f7d7-4029-83d9-008937f9d468",
RegionId: "cn-shanghai",
AccessKey: "LTAI4G8KxxxxxxxxxxxxxbwZLBr",
SecretKey: "n5jTL9YxxxxxxxxxxxxaxmPLZV9",
OpenKMS: true,
TimeoutMs: 5000,
LogLevel: "debug",
}
// a more graceful way to create config client
client, err := clients.NewConfigClient(
vo.NacosClientParam{
ClientConfig: &cc,
},
)
- Register instance：RegisterInstance
success, err := namingClient.RegisterInstance(vo.RegisterInstanceParam{
Ip: "10.0.0.11",
Port: 8848,
ServiceName: "demo.go",
Weight: 10,
Enable: true,
Healthy: true,
Ephemeral: true,
Metadata: map[string]string{"idc":"shanghai"},
ClusterName: "cluster-a", // default value is DEFAULT
GroupName: "group-a", // default value is DEFAULT_GROUP
})
- Deregister instance：DeregisterInstance
success, err := namingClient.DeregisterInstance(vo.DeregisterInstanceParam{
Ip: "10.0.0.11",
Port: 8848,
ServiceName: "demo.go",
Ephemeral: true,
Cluster: "cluster-a", // default value is DEFAULT
GroupName: "group-a", // default value is DEFAULT_GROUP
})- Get service：GetService
services, err := namingClient.GetService(vo.GetServiceParam{
ServiceName: "demo.go",
Clusters: []string{"cluster-a"}, // default value is DEFAULT
GroupName: "group-a", // default value is DEFAULT_GROUP
})- Get all instances：SelectAllInstances
// SelectAllInstance return all instances,include healthy=false,enable=false,weight<=0
instances, err := namingClient.SelectAllInstances(vo.SelectAllInstancesParam{
ServiceName: "demo.go",
GroupName: "group-a", // default value is DEFAULT_GROUP
Clusters: []string{"cluster-a"}, // default value is DEFAULT
})- Get instances ：SelectInstances
// SelectInstances only return the instances of healthy=${HealthyOnly},enable=true and weight>0
instances, err := namingClient.SelectInstances(vo.SelectInstancesParam{
ServiceName: "demo.go",
GroupName: "group-a", // default value is DEFAULT_GROUP
Clusters: []string{"cluster-a"}, // default value is DEFAULT
HealthyOnly: true,
})- Get one healthy instance（WRR）：SelectOneHealthyInstance
// SelectOneHealthyInstance return one instance by WRR strategy for load balance
// And the instance should be health=true,enable=true and weight>0
instance, err := namingClient.SelectOneHealthyInstance(vo.SelectOneHealthInstanceParam{
ServiceName: "demo.go",
GroupName: "group-a", // default value is DEFAULT_GROUP
Clusters: []string{"cluster-a"}, // default value is DEFAULT
})- Listen service change event：Subscribe
// Subscribe key = serviceName+groupName+cluster
// Note: We call add multiple SubscribeCallback with the same key.
err := namingClient.Subscribe(vo.SubscribeParam{
ServiceName: "demo.go",
GroupName: "group-a", // default value is DEFAULT_GROUP
Clusters: []string{"cluster-a"}, // default value is DEFAULT
SubscribeCallback: func (services []model.Instance, err error) {
log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
},
})- Cancel listen of service change event：Unsubscribe
err := namingClient.Unsubscribe(vo.SubscribeParam{
ServiceName: "demo.go",
GroupName: "group-a", // default value is DEFAULT_GROUP
Clusters: []string{"cluster-a"}, // default value is DEFAULT
SubscribeCallback: func (services []model.Instance, err error) {
log.Printf("\n\n callback return services:%s \n\n", utils.ToJsonString(services))
},
})- Get all services name:GetAllServicesInfo
serviceInfos, err := namingClient.GetAllServicesInfo(vo.GetAllServiceInfoParam{
NameSpace: "0e83cc81-9d8c-4bb8-a28a-ff703187543f",
PageNo: 1,
PageSize: 10,
}),- publish config：PublishConfig
success, err := configClient.PublishConfig(vo.ConfigParam{
DataId: "dataId",
Group: "group",
Content: "hello world!222222"})- delete config：DeleteConfig
success, err = configClient.DeleteConfig(vo.ConfigParam{
DataId: "dataId",
Group: "group"})- get config info：GetConfig
content, err := configClient.GetConfig(vo.ConfigParam{
DataId: "dataId",
Group: "group"})
- Listen config change event：ListenConfig
err := configClient.ListenConfig(vo.ConfigParam{
DataId: "dataId",
Group: "group",
OnChange: func (namespace, group, dataId, data string) {
fmt.Println("group:" + group + ", dataId:" + dataId + ", data:" + data)
},
})- Cancel the listening of config change event：CancelListenConfig
err := configClient.CancelListenConfig(vo.ConfigParam{
DataId: "dataId",
Group: "group",
})- Search config: SearchConfig
configPage, err := configClient.SearchConfig(vo.SearchConfigParam{
Search: "blur",
DataId: "",
Group: "",
PageNo: 1,
PageSize: 10,
})We can run example to learn how to use nacos go client.
You can view the open-api documentation from the Nacos open-api wepsite.
You can view the full documentation from the Nacos website.
Contributors are welcomed to join Nacos-sdk-go project. Please check CONTRIBUTING.md about how to contribute to this project.
- Join us from DingDing Group(23191211).
- Gitter: Nacos's IM tool for community messaging, collaboration and discovery.
- Twitter: Follow along for latest nacos news on Twitter.
- Weibo: Follow along for latest nacos news on Weibo (Twitter of China version).
- Nacos SegmentFault: Get the latest notice and prompt help from SegmentFault.
- Email Group:
- users-nacos@googlegroups.com: Nacos usage general discussion.
- dev-nacos@googlegroups.com: Nacos developer discussion (APIs, feature design, etc).
- commits-nacos@googlegroups.com: Commits notice, very high frequency.