fabric的test-network
fabric源码包提供1个测试案例目录test-network，见下图。
在该目录中，执行./network.sh createChannel -c mychannel，将启动1个网络，创建名为mychannel的通道。
在这个网络中，存在peer0.org1.example.com、peer0.org2.example.com、orderer.example.com共3个节点。
配置/etc/hosts
配置/etc/hosts的目的，是让另1个终端SDK程序能够访问到3个节点：peer0.org1.example.com、peer0.org2.example.com、orderer.example.com。
使用docker exec -it peer0.org1.example.com /bin/ash进入其中1个节点。
在peer0.org1的节点中执行ping peer0.org1.example.com，获得该节点的IP地址。类似地，获得其他2个节点的IP地址。
另开1个终端，修改/etc/hosts文件如下。并确认，这个终端，与上述3个节点的网络是相通的。
用Go编写SDK案例，访问上面的网络
新建1个目录queryChannel，这个案例用来查询网络中已经创建的通道名称。在这个目录中，新建2个文件e2e.yaml和queryChannel.go。
配置文件e2e.yaml内容如下。
version: 1.0.0
client:
organization: Org1
logging:
level: info
cryptoconfig:
path: /root/go/src/github.com/hyperledger/fabric/scripts/fabric-samples/test-network/organizations
credentialStore:
path: "/tmp/state-store"
cryptoStore:
path: /tmp/msp
tlsCerts:
client:
key:
path: /root/go/src/github.com/hyperledger/fabric/scripts/fabric-samples/test-network/organizations/peerOrganizations/org1.example.com/users/[email protected]/tls/client.key
cert:
path: /root/go/src/github.com/hyperledger/fabric/scripts/fabric-samples/test-network/organizations/peerOrganizations/org1.example.com/users/[email protected]/tls/client.crt
organizations:
Org1:
mspid: Org1MSP
cryptoPath: peerOrganizations/org1.example.com/users/{
username}@org1.example.com/msp
peers:
- peer0.org1.example.com
peers:
peer0.org1.example.com:
url: peer0.org1.example.com:7051
tlsCACerts:
path: /root/go/src/github.com/hyperledger/fabric/scripts/fabric-samples/test-network/organizations/peerOrganizations/org1.example.com/tlsca/tlsca.org1.example.com-cert.pem
SDK程序queryChannel.go的内容如下。
package main
import (
"log"
"strings"
"github.com/hyperledger/fabric-sdk-go/pkg/client/resmgmt"
"github.com/hyperledger/fabric-sdk-go/pkg/common/errors/retry"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/core"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/fab"
"github.com/hyperledger/fabric-sdk-go/pkg/core/config"
"github.com/hyperledger/fabric-sdk-go/pkg/core/config/lookup"
"github.com/hyperledger/fabric-sdk-go/pkg/fabsdk"
"github.com/pkg/errors"
)
const (
orgName = "Org1"
orgAdmin = "Admin"
)
func main() {
configPath := "./e2e.yaml"
configProvider := config.FromFile(configPath)
sdk, err := fabsdk.New(configProvider)
if err != nil {
log.Fatalf("Failed to create new SDK: %s", err)
}
defer sdk.Close()
queryChannel(sdk)
}
func queryChannel(sdk *fabsdk.FabricSDK) {
configBackend, err := sdk.Config()
if err != nil {
log.Fatalf("Failed to get config backend from SDK: %s", err)
}
targets, err := orgTargetPeers([]string{
orgName}, configBackend)
if err != nil {
log.Fatalf("creating peers failed: %s", err)
}
clientContext := sdk.Context(fabsdk.WithUser("User1"), fabsdk.WithOrg("Org1"))
resMgmtClient, err := resmgmt.New(clientContext)
if err != nil {
log.Fatalf("failed to query channel management client:%s", err)
}
channelQueryResponse, err := resMgmtClient.QueryChannels(
resmgmt.WithTargetEndpoints(targets[0]), resmgmt.WithRetry(retry.DefaultResMgmtOpts))
if err != nil {
log.Fatalf("QueryChannels return error: %s", err)
}
for _, channel := range channelQueryResponse.Channels {
log.Printf("*** Channel :%s\n", channel.ChannelId)
}
}
func orgTargetPeers(orgs []string, configBackend ...core.ConfigBackend) ([]string, error) {
networkConfig := fab.NetworkConfig{
}
err := lookup.New(configBackend...).UnmarshalKey("organizations", &networkConfig.Organizations)
if err != nil {
return nil, errors.WithMessage(err, "failed to get organizations from config ")
}
var peers []string
for _, org := range orgs {
orgConfig, ok := networkConfig.Organizations[strings.ToLower(org)]
if !ok {
continue
}
peers = append(peers, orgConfig.Peers...)
}
return peers, nil
}
执行go mod init .初始化该案例，会下载一些依赖包。
执行go run . ，运行这个SDK案例程序，在指定网络中查询并输出已经安装的通道名称。
