use predefined endpoint separator

core/discov/kubernetes/discov-namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: discov

core/discov/kubernetes/etcd.yaml

@@ -0,0 +1,368 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: etcd
+  namespace: discov
+spec:
+  ports:
+    - name: etcd-port
+      port: 2379
+      protocol: TCP
+      targetPort: 2379
+  selector:
+    app: etcd
+
+---
+
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    app: etcd
+    etcd_node: etcd0
+  name: etcd0
+  namespace: discov
+spec:
+  containers:
+    - command:
+        - /usr/local/bin/etcd
+        - --name
+        - etcd0
+        - --initial-advertise-peer-urls
+        - http://etcd0:2380
+        - --listen-peer-urls
+        - http://0.0.0.0:2380
+        - --listen-client-urls
+        - http://0.0.0.0:2379
+        - --advertise-client-urls
+        - http://etcd0:2379
+        - --initial-cluster
+        - etcd0=http://etcd0:2380,etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380,etcd4=http://etcd4:2380
+        - --initial-cluster-state
+        - new
+      image: quay.io/coreos/etcd:latest
+      name: etcd0
+      ports:
+        - containerPort: 2379
+          name: client
+          protocol: TCP
+        - containerPort: 2380
+          name: server
+          protocol: TCP
+  affinity:
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchExpressions:
+              - key: app
+                operator: In
+                values:
+                  - etcd
+          topologyKey: "kubernetes.io/hostname"
+  restartPolicy: Always
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    etcd_node: etcd0
+  name: etcd0
+  namespace: discov
+spec:
+  ports:
+    - name: client
+      port: 2379
+      protocol: TCP
+      targetPort: 2379
+    - name: server
+      port: 2380
+      protocol: TCP
+      targetPort: 2380
+  selector:
+    etcd_node: etcd0
+
+---
+
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    app: etcd
+    etcd_node: etcd1
+  name: etcd1
+  namespace: discov
+spec:
+  containers:
+    - command:
+        - /usr/local/bin/etcd
+        - --name
+        - etcd1
+        - --initial-advertise-peer-urls
+        - http://etcd1:2380
+        - --listen-peer-urls
+        - http://0.0.0.0:2380
+        - --listen-client-urls
+        - http://0.0.0.0:2379
+        - --advertise-client-urls
+        - http://etcd1:2379
+        - --initial-cluster
+        - etcd0=http://etcd0:2380,etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380,etcd4=http://etcd4:2380
+        - --initial-cluster-state
+        - new
+      image: quay.io/coreos/etcd:latest
+      name: etcd1
+      ports:
+        - containerPort: 2379
+          name: client
+          protocol: TCP
+        - containerPort: 2380
+          name: server
+          protocol: TCP
+  affinity:
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchExpressions:
+              - key: app
+                operator: In
+                values:
+                  - etcd
+          topologyKey: "kubernetes.io/hostname"
+  restartPolicy: Always
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    etcd_node: etcd1
+  name: etcd1
+  namespace: discov
+spec:
+  ports:
+    - name: client
+      port: 2379
+      protocol: TCP
+      targetPort: 2379
+    - name: server
+      port: 2380
+      protocol: TCP
+      targetPort: 2380
+  selector:
+    etcd_node: etcd1
+
+---
+
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    app: etcd
+    etcd_node: etcd2
+  name: etcd2
+  namespace: discov
+spec:
+  containers:
+    - command:
+        - /usr/local/bin/etcd
+        - --name
+        - etcd2
+        - --initial-advertise-peer-urls
+        - http://etcd2:2380
+        - --listen-peer-urls
+        - http://0.0.0.0:2380
+        - --listen-client-urls
+        - http://0.0.0.0:2379
+        - --advertise-client-urls
+        - http://etcd2:2379
+        - --initial-cluster
+        - etcd0=http://etcd0:2380,etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380,etcd4=http://etcd4:2380
+        - --initial-cluster-state
+        - new
+      image: quay.io/coreos/etcd:latest
+      name: etcd2
+      ports:
+        - containerPort: 2379
+          name: client
+          protocol: TCP
+        - containerPort: 2380
+          name: server
+          protocol: TCP
+  affinity:
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchExpressions:
+              - key: app
+                operator: In
+                values:
+                  - etcd
+          topologyKey: "kubernetes.io/hostname"
+  restartPolicy: Always
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    etcd_node: etcd2
+  name: etcd2
+  namespace: discov
+spec:
+  ports:
+    - name: client
+      port: 2379
+      protocol: TCP
+      targetPort: 2379
+    - name: server
+      port: 2380
+      protocol: TCP
+      targetPort: 2380
+  selector:
+    etcd_node: etcd2
+
+---
+
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    app: etcd
+    etcd_node: etcd3
+  name: etcd3
+  namespace: discov
+spec:
+  containers:
+    - command:
+        - /usr/local/bin/etcd
+        - --name
+        - etcd3
+        - --initial-advertise-peer-urls
+        - http://etcd3:2380
+        - --listen-peer-urls
+        - http://0.0.0.0:2380
+        - --listen-client-urls
+        - http://0.0.0.0:2379
+        - --advertise-client-urls
+        - http://etcd3:2379
+        - --initial-cluster
+        - etcd0=http://etcd0:2380,etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380,etcd4=http://etcd4:2380
+        - --initial-cluster-state
+        - new
+      image: quay.io/coreos/etcd:latest
+      name: etcd3
+      ports:
+        - containerPort: 2379
+          name: client
+          protocol: TCP
+        - containerPort: 2380
+          name: server
+          protocol: TCP
+  affinity:
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchExpressions:
+              - key: app
+                operator: In
+                values:
+                  - etcd
+          topologyKey: "kubernetes.io/hostname"
+  restartPolicy: Always
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    etcd_node: etcd3
+  name: etcd3
+  namespace: discov
+spec:
+  ports:
+    - name: client
+      port: 2379
+      protocol: TCP
+      targetPort: 2379
+    - name: server
+      port: 2380
+      protocol: TCP
+      targetPort: 2380
+  selector:
+    etcd_node: etcd3
+
+---
+
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    app: etcd
+    etcd_node: etcd4
+  name: etcd4
+  namespace: discov
+spec:
+  containers:
+    - command:
+        - /usr/local/bin/etcd
+        - --name
+        - etcd4
+        - --initial-advertise-peer-urls
+        - http://etcd4:2380
+        - --listen-peer-urls
+        - http://0.0.0.0:2380
+        - --listen-client-urls
+        - http://0.0.0.0:2379
+        - --advertise-client-urls
+        - http://etcd4:2379
+        - --initial-cluster
+        - etcd0=http://etcd0:2380,etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380,etcd4=http://etcd4:2380
+        - --initial-cluster-state
+        - new
+      image: quay.io/coreos/etcd:latest
+      name: etcd4
+      ports:
+        - containerPort: 2379
+          name: client
+          protocol: TCP
+        - containerPort: 2380
+          name: server
+          protocol: TCP
+  affinity:
+    podAntiAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        - labelSelector:
+            matchExpressions:
+              - key: app
+                operator: In
+                values:
+                  - etcd
+          topologyKey: "kubernetes.io/hostname"
+  restartPolicy: Always
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    etcd_node: etcd4
+  name: etcd4
+  namespace: discov
+spec:
+  ports:
+    - name: client
+      port: 2379
+      protocol: TCP
+      targetPort: 2379
+    - name: server
+      port: 2380
+      protocol: TCP
+      targetPort: 2380
+  selector:
+    etcd_node: etcd4

core/logx/logs.go

@@ -213,6 +213,7 @@ func Infof(format string, v ...interface{}) {
 func Must(err error) {
 	if err != nil {
 		msg := formatWithCaller(err.Error(), 3)
+		log.Print(msg)
 		output(severeLog, levelFatal, msg)
 		os.Exit(1)
 	}

rpcx/internal/resolver/directbuilder.go

@@ -12,7 +12,7 @@ func (d *directBuilder) Build(target resolver.Target, cc resolver.ClientConn, op
 	resolver.Resolver, error) {
 	var addrs []resolver.Address
 	endpoints := strings.FieldsFunc(target.Endpoint, func(r rune) bool {
-		return r == EndpointSep
+		return r == EndpointSepChar
 	})
 
 	for _, val := range subset(endpoints, subsetSize) {

rpcx/internal/resolver/discovbuilder.go

@@ -12,7 +12,7 @@ type discovBuilder struct{}
 func (d *discovBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (
 	resolver.Resolver, error) {
 	hosts := strings.FieldsFunc(target.Authority, func(r rune) bool {
-		return r == EndpointSep
+		return r == EndpointSepChar
 	})
 	sub, err := discov.NewSubscriber(hosts, target.Endpoint)
 	if err != nil {

rpcx/internal/resolver/resolver.go

@@ -1,17 +1,22 @@
 package resolver
 
-import "google.golang.org/grpc/resolver"
+import (
+	"fmt"
+
+	"google.golang.org/grpc/resolver"
+)
 
 const (
-	DirectScheme = "direct"
-	DiscovScheme = "discov"
-	EndpointSep  = ','
-	subsetSize   = 32
+	DirectScheme    = "direct"
+	DiscovScheme    = "discov"
+	EndpointSepChar = ','
+	subsetSize      = 32
 )
 
 var (
-	dirBuilder directBuilder
-	disBuilder discovBuilder
+	EndpointSep = fmt.Sprintf("%c", EndpointSepChar)
+	dirBuilder  directBuilder
+	disBuilder  discovBuilder
 )
 
 func RegisterResolver() {

rpcx/internal/target.go

@@ -8,11 +8,11 @@ import (
 )
 
 func BuildDirectTarget(endpoints []string) string {
-	return fmt.Sprintf("%s:///%s", resolver.DirectScheme, strings.Join(
-		endpoints, fmt.Sprintf("%c", resolver.EndpointSep)))
+	return fmt.Sprintf("%s:///%s", resolver.DirectScheme,
+		strings.Join(endpoints, resolver.EndpointSep))
 }
 
 func BuildDiscovTarget(endpoints []string, key string) string {
-	return fmt.Sprintf("%s://%s/%s", resolver.DiscovScheme, strings.Join(
-		endpoints, fmt.Sprintf("%c", resolver.EndpointSep)), key)
+	return fmt.Sprintf("%s://%s/%s", resolver.DiscovScheme,
+		strings.Join(endpoints, resolver.EndpointSep), key)
 }