zookeeper
Install
go get github.com/hertz-contrib/registry/zookeeper
Service Registry
NewZookeeperRegistry
NewZookeeperRegistry uses zookeeper to create a service registry. You need to pass the service to Connect through a string slice together with the session timeout.
Function signature:
func NewZookeeperRegistry(servers []string, sessionTimeout time.Duration) (registry.Registry, error)
Example:
func main() {
// ...
r, err := zookeeper.NewZookeeperRegistry([]string{"127.0.0.1:2181"}, 40*time.Second)
if err != nil {
panic(err)
}
h := server.Default(
server.WithHostPorts(addr),
server.WithRegistry(r, ®istry.Info{
ServiceName: "hertz.test.demo",
Addr: utils.NewNetAddr("tcp", addr),
Weight: 10,
Tags: nil,
}))
// ...
}
NewZookeeperRegistryWithAuth
NewZookeeperRegistryWithAuth uses zookeeper to create a service registry. You need to pass the service into Connect through a string slice and session timeout time. In addition, you need to pass in the user and password to call AddAuth, the user and password Can not be empty.
Function signature:
func NewZookeeperRegistryWithAuth(servers []string, sessionTimeout time.Duration, user, password string)
Example:
func main() {
// ...
r, err := zookeeper.NewZookeeperRegistryWithAuth([]string{"127.0.0.1:2181"}, 20*time.Second, "hertzuser", "hertzpass")
if err != nil {
panic(err)
}
h := server.Default(
server.WithHostPorts(addr),
server.WithRegistry(r, ®istry.Info{
ServiceName: "hertz.test.demo",
Addr: utils.NewNetAddr("tcp", addr),
Weight: 10,
Tags: nil,
}))
// ...
}
Service Discovery
NewZookeeperResolver
NewZookeeperResolver uses zookeeper to create a service discovery center, which needs to pass a string slice and session timeout to Connect.
Function signature:
func NewZookeeperResolver(servers []string, sessionTimeout time.Duration) (discovery.Resolver, error)
Example:
func main() {
cli, err := client.NewClient()
if err != nil {
panic(err)
}
r, err := zookeeper.NewZookeeperResolver([]string{"127.0.0.1:2181"}, 40*time.Second)
if err != nil {
panic(err)
}
cli.Use(sd.Discovery(r))
// ...
}
NewZookeeperResolverWithAuth
NewZookeeperResolverWithAuth uses zookeeper to create a service discovery center. You need to pass the service into Connect through a string slice and session timeout. In addition, you need to pass in the user and password to call AddAuth, the user and password Can not be empty.
Function signature:
func NewZookeeperResolverWithAuth(servers []string, sessionTimeout time.Duration, user, password string)
Example:
func main() {
cli, err := client.NewClient()
if err != nil {
panic(err)
}
r, err := zookeeper.NewZookeeperResolverWithAuth([]string{"127.0.0.1:2181"}, 40*time.Second, "hertzuser", "hertzpass")
if err != nil {
panic(err)
}
cli.Use(sd.Discovery(r))
// ...
}
How to use
Server
import (
"context"
"time"
"github.com/cloudwego/hertz/pkg/app"
"github.com/cloudwego/hertz/pkg/app/server"
"github.com/cloudwego/hertz/pkg/app/server/registry"
"github.com/cloudwego/hertz/pkg/common/utils"
"github.com/cloudwego/hertz/pkg/protocol/consts"
"github.com/hertz-contrib/registry/zookeeper"
)
func main() {
addr := "127.0.0.1:8888"
r, err := zookeeper.NewZookeeperRegistry([]string{"127.0.0.1:2181"}, 40*time.Second)
if err != nil {
panic(err)
}
h := server.Default(
server.WithHostPorts(addr),
server.WithRegistry(r, ®istry.Info{
ServiceName: "hertz.test.demo",
Addr: utils.NewNetAddr("tcp", addr),
Weight: 10,
Tags: nil,
}))
h.GET("/ping", func(c context.Context, ctx *app.RequestContext) {
ctx.JSON(consts.StatusOK, utils.H{"ping": "pong2"})
})
h.Spin()
}
Client
import (
"context"
"time"
"github.com/cloudwego/hertz/pkg/app/client"
"github.com/cloudwego/hertz/pkg/app/middlewares/client/sd"
"github.com/cloudwego/hertz/pkg/common/config"
"github.com/cloudwego/hertz/pkg/common/hlog"
"github.com/hertz-contrib/registry/zookeeper"
)
func main() {
cli, err := client.NewClient()
if err != nil {
panic(err)
}
r, err := zookeeper.NewZookeeperResolver([]string{"127.0.0.1:2181"}, 40*time.Second)
if err != nil {
panic(err)
}
cli.Use(sd.Discovery(r))
for i := 0; i < 10; i++ {
status, body, err := cli.Get(context.Background(), nil, "http://hertz.test.demo/ping", config.WithSD(true))
if err != nil {
hlog.Fatal(err)
}
hlog.Infof("code=%d,body=%s", status, string(body))
}
}
Configuration
The configuration of Zookeeper client and server can be customized, refer to the configuration of go-zookeeper/zk.
Complete Example
For more, see example .