Fabric建链docker-compose方式(客户端与节点主机分离)

2023-11-02 06:20

本文主要是介绍Fabric建链docker-compose方式(客户端与节点主机分离),希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!

目录

  • 一、客户端准备
    • 1.1、准备链目录和配置文件
    • 1.2、设置环境变量
    • 1.3、初始化和启动fabric-ca-server
    • 1.4、登记ca的admin用户
  • 二、准备组织org1
    • 2.1、准备组织目录
    • 2.2、生成组织org1的msp配置
  • 三、准备peer0节点
    • 3.1、注册peer0
    • 3.2、注册peer组织org1的user
    • 3.3、注册peer组织org1的admin
    • 3.4、登记peer0
    • 3.5、登记peer0的tls
    • 3.6、登记peer组织org1的user
    • 3.7、登记peer组织org1的admin
  • 四、准备orderer0节点
    • 4.1、注册orderer0
    • 4.2、注册orderer组织org1的admin
    • 4.3、登记orderer0
    • 4.4、登记orderer0的tls
    • 4.5、登记orderer组织org1的admin
  • 五、准备创世区块
  • 六、服务端准备
    • 6.1、准备peer0
    • 6.2、准备orderer0
    • 6.3、docker-compose启动节点
  • 七、创建应用通道channel1
    • 7.1、创建应用通道tx交易文件
    • 7.2、创建应用通道区块
    • 7.3、peer0加入应用通道
    • 7.4、获取应用通道最近的配置块
    • 7.5、生成锚节点更新配置文件
    • 7.6、提交更新通道配置交易
  • 八、部署链码发送交易
    • 8.1、编译打包链码
    • 8.2、部署链码
    • 8.3、发送交易

前文 Fabric二进制建链(客户端与节点主机分离)启动节点都是在主机本地,这里将换用docker容器启动各个节点,同样也是保证客户端和节点主机不在一个机器。假设客户端主机在192.168.2.195,在节点主机192.168.3.128部署1个orderer节点和1个peer节点。

拉下来Fabric v2.2.0相关的docker镜像:

hyperledger/fabric-tools:2.2.0     # 包含二进制工具
hyperledger/fabric-peer:2.2.0      # 对等节点
hyperledger/fabric-orderer:2.2.0   # 排序节点
hyperledger/fabric-ccenv:2.2.0     # 合约运行环境
hyperledger/fabric-baseos:2.2.0    # 基础操作系统
hyperledger/fabric-nodeenv:2.2.0   # 提供node环境
hyperledger/fabric-javaenv:2.2.0   # 提供java环境
hyperledger/fabric-ca:1.4.7        # 身份认证和秘钥管理

节点主机192.168.3.128上需要的docker-compose配置:

version: '2'volumes:orderer0.org1.example.com:peer0.org1.example.com:networks:dev:name: fabric_devservices:orderer0.org1.example.com:container_name: orderer0.org1.example.comimage: hyperledger/fabric-orderer:2.2.0environment:#- FABRIC_LOGGING_SPEC=INFO- FABRIC_LOGGING_SPEC=DEBUG- ORDERER_GENERAL_LISTENADDRESS=0.0.0.0- ORDERER_GENERAL_LISTENPORT=7050- ORDERER_GENERAL_GENESISMETHOD=file- ORDERER_GENERAL_GENESISFILE=/var/hyperledger/orderer/orderer.genesis.block- ORDERER_GENERAL_LOCALMSPID=OrdererOrg1MSP- ORDERER_GENERAL_LOCALMSPDIR=/var/hyperledger/orderer/msp- ORDERER_OPERATIONS_LISTENADDRESS=0.0.0.0:17050# enabled TLS- ORDERER_GENERAL_TLS_ENABLED=true- ORDERER_GENERAL_TLS_PRIVATEKEY=/var/hyperledger/orderer/tls/server.key- ORDERER_GENERAL_TLS_CERTIFICATE=/var/hyperledger/orderer/tls/server.crt- ORDERER_GENERAL_TLS_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]- ORDERER_KAFKA_TOPIC_REPLICATIONFACTOR=1- ORDERER_KAFKA_VERBOSE=true- ORDERER_GENERAL_CLUSTER_CLIENTCERTIFICATE=/var/hyperledger/orderer/tls/server.crt- ORDERER_GENERAL_CLUSTER_CLIENTPRIVATEKEY=/var/hyperledger/orderer/tls/server.key- ORDERER_GENERAL_CLUSTER_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]working_dir: /opt/gopath/src/github.com/hyperledger/fabriccommand: orderervolumes:- /home/songzehao/fabric/config/system-genesis-block/genesis.block:/var/hyperledger/orderer/orderer.genesis.block- /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp:/var/hyperledger/orderer/msp- /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/:/var/hyperledger/orderer/tls- /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com:/var/hyperledger/production/ordererports:- 7050:7050- 17050:17050networks:- devpeer0.org1.example.com:container_name: peer0.org1.example.comimage: hyperledger/fabric-peer:2.2.0environment:#Generic peer variables- CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock- CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=fabric_dev#- FABRIC_LOGGING_SPEC=INFO- FABRIC_LOGGING_SPEC=DEBUG- CORE_PEER_TLS_ENABLED=true- CORE_PEER_PROFILE_ENABLED=false- CORE_PEER_TLS_CERT_FILE=/etc/hyperledger/fabric/tls/server.crt- CORE_PEER_TLS_KEY_FILE=/etc/hyperledger/fabric/tls/server.key- CORE_PEER_TLS_ROOTCERT_FILE=/etc/hyperledger/fabric/tls/ca.crt# Peer specific variabes- CORE_PEER_ID=peer0.org1.example.com- CORE_PEER_ADDRESS=0.0.0.0:7051- CORE_PEER_LISTENADDRESS=0.0.0.0:7051#- CORE_PEER_CHAINCODEADDRESS=0.0.0.0:7052- CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:7052- CORE_PEER_GOSSIP_BOOTSTRAP=0.0.0.0:7051- CORE_PEER_GOSSIP_EXTERNALENDPOINT=0.0.0.0:7051- CORE_PEER_LOCALMSPID=Org1MSP- CORE_OPERATIONS_LISTENADDRESS=0.0.0.0:17051volumes:- /var/run/docker.sock:/host/var/run/docker.sock- /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp:/etc/hyperledger/fabric/msp- /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls:/etc/hyperledger/fabric/tls- /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/peer0.org1.example.com:/var/hyperledger/productionworking_dir: /opt/gopath/src/github.com/hyperledger/fabric/peercommand: peer node startports:- 7051:7051- 17051:17051networks:- dev

一、客户端准备

1.1、准备链目录和配置文件

mkdir -p ~/fabric/organizations/ordererOrganizations
mkdir -p ~/fabric/organizations/peerOrganizationsmkdir -p ~/fabric/bin
# fabric-ca-server
# fabric-ca-client
# peer
# configtxgen
# configtxlatormkdir -p ~/fabric/config
# configtx.yamlmkdir -p ~/fabric/log

configtx.yaml模板:

Organizations:- &OrdererOrg1Name: OrdererOrg1SkipAsForeign: falseID: OrdererOrg1MSPMSPDir: /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/mspPolicies:Readers:Type: SignatureRule: "OR('OrdererOrg1MSP.member')"Writers:Type: SignatureRule: "OR('OrdererOrg1MSP.member')"Admins:Type: SignatureRule: "OR('OrdererOrg1MSP.admin')"OrdererEndpoints:- "192.168.3.128:7050"- &Org1Name: Org1MSPSkipAsForeign: falseID: Org1MSPMSPDir: /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/mspPolicies:Readers:Type: SignatureRule: "OR('Org1MSP.member')"Writers:Type: SignatureRule: "OR('Org1MSP.member')"Admins:Type: SignatureRule: "OR('Org1MSP.admin')"Endorsement:Type: SignatureRule: "OR('Org1MSP.member')"AnchorPeers:- Host: 192.168.3.128Port: 7051Capabilities:Channel: &ChannelCapabilitiesV2_0: trueOrderer: &OrdererCapabilitiesV2_0: trueApplication: &ApplicationCapabilitiesV2_0: trueApplication: &ApplicationDefaultsOrganizations:Policies:LifecycleEndorsement:Type: ImplicitMetaRule: "MAJORITY Endorsement"Endorsement:Type: ImplicitMetaRule: "MAJORITY Endorsement"Readers:Type: ImplicitMetaRule: "ANY Readers"Writers:Type: ImplicitMetaRule: "ANY Writers"Admins:Type: ImplicitMetaRule: "MAJORITY Admins"Capabilities:<<: *ApplicationCapabilitiesOrderer: &OrdererDefaultsOrdererType: etcdraftAddresses:- 192.168.3.128:7050EtcdRaft:Consenters:- Host: 192.168.3.128Port: 7050ClientTLSCert: /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/server.crtServerTLSCert: /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/server.crtBatchTimeout: 2sBatchSize:MaxMessageCount: 10AbsoluteMaxBytes: 99 MBPreferredMaxBytes: 521 KBMaxChannels: 0Organizations:Policies:Readers:Type: ImplicitMetaRule: "ANY Readers"Writers:Type: ImplicitMetaRule: "ANY Writers"Admins:Type: ImplicitMetaRule: "MAJORITY Admins"BlockValidation:Type: ImplicitMetaRule: "ANY Writers"Channel: &ChannelDefaultsPolicies:Readers:Type: ImplicitMetaRule: "ANY Readers"Writers:Type: ImplicitMetaRule: "ANY Writers"Admins:Type: ImplicitMetaRule: "MAJORITY Admins"Capabilities:<<: *ChannelCapabilitiesProfiles:OneOrgOrdererGenesis:<<: *ChannelDefaultsOrderer:<<: *OrdererDefaultsOrganizations:- *OrdererOrg1Capabilities:<<: *OrdererCapabilitiesConsortiums:SampleConsortium:Organizations:- *Org1Channel1:Consortium: SampleConsortium<<: *ChannelDefaultsApplication:<<: *ApplicationDefaultsOrganizations:- *Org1Capabilities:<<: *ApplicationCapabilities

还需要ca-server的配置文件fabric-ca-server-config.yaml

version: 1.2.0port: 7054debug: falsecrlsizelimit: 512000tls:# Enable TLS (default: false)enabled: true# TLS for the server's listening portcertfile:keyfile:clientauth:type: noclientcertcertfiles:ca:name: ca-org1keyfile:certfile:chainfile:crl:expiry: 24hregistry:maxenrollments: -1identities:- name: adminpass: adminpwtype: clientaffiliation: ""attrs:hf.Registrar.Roles: "*"hf.Registrar.DelegateRoles: "*"hf.Revoker: truehf.IntermediateCA: truehf.GenCRL: truehf.Registrar.Attributes: "*"hf.AffiliationMgr: truedb:type: sqlite3datasource: fabric-ca-server.dbtls:enabled: falsecertfiles:client:certfile:keyfile:ldap:enabled: falseurl: ldap://<adminDN>:<adminPassword>@<host>:<port>/<base>tls:certfiles:client:certfile:keyfile:attribute:names: ['uid','member']converters:- name:value:maps:groups:- name:value:affiliations:org1:- department1- department2org2:- department1signing:default:usage:- digital signatureexpiry: 8760hprofiles:ca:usage:- cert sign- crl signexpiry: 43800hcaconstraint:isca: truemaxpathlen: 0tls:usage:- signing- key encipherment- server auth- client auth- key agreementexpiry: 8760hcsr:cn: ca.org1.example.comnames:- C: USST: "North Carolina"L: "Durham"O: org1.example.comOU:hosts:- 192.168.2.195ca:expiry: 131400hpathlength: 1bccsp:default: SWsw:hash: SHA2security: 256filekeystore:# The directory used for the software file-based keystorekeystore: msp/keystorecacount:cafiles:intermediate:parentserver:url:caname:enrollment:hosts:profile:label:tls:certfiles:client:certfile:keyfile:

目录如下:

/home/songzehao/fabric
├── bin
│   ├── configtxgen
│   ├── configtxlator
│   ├── fabric-ca-client
│   ├── fabric-ca-server
│   └── peer
├── config
│   └── configtx.yaml
├── fabric-ca-server-config.yaml
├── log
└── organizations├── ordererOrganizations└── peerOrganizations6 directories, 6 files

1.2、设置环境变量

export PATH=/home/songzehao/fabric/bin:$PATH
export FABRIC_CA_CLIENT_HOME=/home/songzehao/fabric/fabric-ca-client
export FABRIC_CFG_PATH=/home/songzehao/fabric/config

1.3、初始化和启动fabric-ca-server

初始化:

fabric-ca-server init -b admin:adminpw

启动:

nohup fabric-ca-server start -b admin:adminpw >> ~/fabric/log/fabric-ca-server.log 2>&1 &

1.4、登记ca的admin用户

fabric-ca-client enroll -u https://admin:adminpw@192.168.2.195:7054 --caname ca-org1 --tls.certfiles ~/fabric/ca-cert.pem

到这一步的目录如下:

/home/songzehao/fabric
├── bin
│   ├── configtxgen
│   ├── fabric-ca-client
│   ├── fabric-ca-server
│   └── peer
├── ca-cert.pem
├── config
│   └── configtx.yaml
├── fabric-ca-client
│   ├── fabric-ca-client-config.yaml
│   └── msp
│       ├── cacerts
│       │   └── 192-168-2-195-7054-ca-org1.pem
│       ├── IssuerPublicKey
│       ├── IssuerRevocationPublicKey
│       ├── keystore
│       │   └── c7292654834ac0d85b2af25206296449117b39a0f124b6faa4247ea3752863bd_sk
│       ├── signcerts
│       │   └── cert.pem
│       └── user
├── fabric-ca-server-config.yaml
├── fabric-ca-server.db
├── IssuerPublicKey
├── IssuerRevocationPublicKey
├── log
│   └── fabric-ca-server.log
├── msp
│   ├── cacerts
│   ├── keystore
│   │   ├── e0f304d534998a7756e8be945abd630a235dbd3125c768a7d2be54e708f739da_sk
│   │   ├── f9300aaa0a24d69fdc62cfb30384870f9b8184fca4b14416e075d38ed0e1bdd2_sk
│   │   ├── IssuerRevocationPrivateKey
│   │   └── IssuerSecretKey
│   ├── signcerts
│   └── user
├── organizations
│   ├── ordererOrganizations
│   └── peerOrganizations
└── tls-cert.pem17 directories, 22 files

二、准备组织org1

2.1、准备组织目录

mkdir -p ~/fabric/organizations/peerOrganizations/org1.example.com/msp
mkdir -p ~/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com
mkdir -p ~/fabric/organizations/ordererOrganizations/org1.example.com/msp
mkdir -p ~/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com

2.2、生成组织org1的msp配置

echo 'NodeOUs:Enable: trueClientOUIdentifier:Certificate: cacerts/192-168-2-195-7054-ca-org1.pemOrganizationalUnitIdentifier: clientPeerOUIdentifier:Certificate: cacerts/192-168-2-195-7054-ca-org1.pemOrganizationalUnitIdentifier: peerAdminOUIdentifier:Certificate: cacerts/192-168-2-195-7054-ca-org1.pemOrganizationalUnitIdentifier: adminOrdererOUIdentifier:Certificate: cacerts/192-168-2-195-7054-ca-org1.pemOrganizationalUnitIdentifier: orderer' > /home/songzehao/fabric/config.yaml

并拷贝org1的ca证书到org1的/msp/tlscacerts、/tlsca和/ca目录:

mkdir -p /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/msp/tlscacerts
cp /home/songzehao/fabric/ca-cert.pem /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/msp/tlscacerts/ca.crtmkdir -p /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/tlsca
cp /home/songzehao/fabric/ca-cert.pem /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/tlsca/tlsca.org1.example.com-cert.pemmkdir -p /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/ca
cp /home/songzehao/fabric/ca-cert.pem /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/ca/ca.org1.example.com-cert.pem

三、准备peer0节点

3.1、注册peer0

fabric-ca-client register --caname ca-org1 --id.name peer0 --id.secret peer0pw --id.type peer --tls.certfiles /home/songzehao/fabric/ca-cert.pem

3.2、注册peer组织org1的user

fabric-ca-client register --caname ca-org1 --id.name user1 --id.secret user1pw --id.type client --tls.certfiles /home/songzehao/fabric/ca-cert.pem

3.3、注册peer组织org1的admin

fabric-ca-client register --caname ca-org1 --id.name org1admin --id.secret org1adminpw --id.type admin --tls.certfiles /home/songzehao/fabric/ca-cert.pem

3.4、登记peer0

fabric-ca-client enroll -u https://peer0:peer0pw@192.168.2.195:7054 --caname ca-org1 -M /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp --tls.certfiles /home/songzehao/fabric/ca-cert.pem

并拷贝该组织的msp配置文件到peer0节点目录下:

cp /home/songzehao/fabric/config.yaml /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/msp/config.yamlcp /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/msp/config.yaml /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp/config.yaml

3.5、登记peer0的tls

fabric-ca-client enroll -u https://peer0:peer0pw@192.168.2.195:7054 --caname ca-org1 -M /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls --enrollment.profile tls --csr.hosts 192.168.3.128 --tls.certfiles /home/songzehao/fabric/ca-cert.pem

3.6、登记peer组织org1的user

cp /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/tlscacerts/* /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
cp /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/signcerts/* /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/server.crt
cp /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/keystore/* /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/server.keyfabric-ca-client enroll -u https://user1:user1pw@192.168.2.195:7054 --caname ca-org1 -M /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp --tls.certfiles /home/songzehao/fabric/ca-cert.pemcp /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/msp/config.yaml /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp/config.yaml

3.7、登记peer组织org1的admin

fabric-ca-client enroll -u https://org1admin:org1adminpw@192.168.2.195:7054 --caname ca-org1 -M /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp --tls.certfiles /home/songzehao/fabric/ca-cert.pemcp /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/msp/config.yaml /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp/config.yaml

四、准备orderer0节点

在ordererOrganizations/org1.example.com/msp目录下,创建tlscacerts子目录:

mkdir -p /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/msp/tlscacerts

拷贝组织的ca证书到tlscacerts子目录:

cp /home/songzehao/fabric/ca-cert.pem /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

创建~/fabric/organizations/ordererOrganizations/org1.example.com/tlsca目录:

mkdir ~/fabric/organizations/ordererOrganizations/org1.example.com/tlsca

拷贝组织的ca证书到tlsca子目录:

cp /home/songzehao/fabric/ca-cert.pem ~/fabric/organizations/ordererOrganizations/org1.example.com/tlsca/tlsca.org1.example.com-cert.pem

4.1、注册orderer0

fabric-ca-client register --caname ca-org1 --id.name orderer0 --id.secret orderer0pw --id.type orderer --tls.certfiles /home/songzehao/fabric/ca-cert.pem

4.2、注册orderer组织org1的admin

fabric-ca-client register --caname ca-org1 --id.name ordererOrg1Admin --id.secret ordererOrg1Adminpw --id.type admin --tls.certfiles /home/songzehao/fabric/ca-cert.pem

4.3、登记orderer0

fabric-ca-client enroll -u https://orderer0:orderer0pw@192.168.2.195:7054 --caname ca-org1 -M /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp --tls.certfiles /home/songzehao/fabric/ca-cert.pem

并拷贝msp配置文件到orderer0节点目录下:

cp /home/songzehao/fabric/config.yaml /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/msp/config.yamlcp /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/msp/config.yaml /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/config.yaml

4.4、登记orderer0的tls

fabric-ca-client enroll -u https://orderer0:orderer0pw@192.168.2.195:7054 --caname ca-org1 -M /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls --enrollment.profile tls --csr.hosts 192.168.3.128 --tls.certfiles /home/songzehao/fabric/ca-cert.pem

拷贝到tls目录下,并重命名为更好看的文件名:

cp /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/tlscacerts/* /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/ca.crt
cp /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/signcerts/* /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/server.crt
cp /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/keystore/* /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/server.key

拷贝该tlsca证书到orderer0节点目录下msp/tlscacerts目录:

mkdir -p /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts
cp /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/tlscacerts/* /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

4.5、登记orderer组织org1的admin

fabric-ca-client enroll -u https://ordererOrg1Admin:ordererOrg1Adminpw@192.168.2.195:7054 --caname ca-org1 -M /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/users/Admin@org1.example.com/msp --tls.certfiles /home/songzehao/fabric/ca-cert.pem

拷贝msp配置文件到管理员的msp目录下:

cp /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/msp/config.yaml /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/users/Admin@org1.example.com/msp/config.yaml

五、准备创世区块

走到这一步,组织目录下msp/只有tlscacerts目录,缺少cacert:

/home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/msp/
├── config.yaml
└── tlscacerts└── tlsca.org1.example.com-cert.pem1 directory, 2 files

所以先将orderer0的msp目录下的cacert,即~/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/cacerts/放到~/fabric/organizations/ordererOrganizations/org1.example.com/msp/cacerts/,顺带给peer0也一起处理:

cp -r /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/cacerts /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/msp
cp -r /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp/cacerts /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/msp

更改configtx.yaml

Organizations:- &OrdererOrg1Name: OrdererOrg1SkipAsForeign: falseID: OrdererOrg1MSPMSPDir: /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/mspPolicies:Readers:Type: SignatureRule: "OR('OrdererOrg1MSP.member')"Writers:Type: SignatureRule: "OR('OrdererOrg1MSP.member')"Admins:Type: SignatureRule: "OR('OrdererOrg1MSP.admin')"OrdererEndpoints:- "192.168.3.128:7050"- &Org1Name: Org1MSPSkipAsForeign: falseID: Org1MSPMSPDir: /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/mspPolicies:Readers:Type: SignatureRule: "OR('Org1MSP.member')"Writers:Type: SignatureRule: "OR('Org1MSP.member')"Admins:Type: SignatureRule: "OR('Org1MSP.admin')"Endorsement:Type: SignatureRule: "OR('Org1MSP.member')"AnchorPeers:- Host: 192.168.3.128Port: 7051Capabilities:Channel: &ChannelCapabilitiesV2_0: trueOrderer: &OrdererCapabilitiesV2_0: trueApplication: &ApplicationCapabilitiesV2_0: trueApplication: &ApplicationDefaultsOrganizations:Policies:LifecycleEndorsement:Type: ImplicitMetaRule: "MAJORITY Endorsement"Endorsement:Type: ImplicitMetaRule: "MAJORITY Endorsement"Readers:Type: ImplicitMetaRule: "ANY Readers"Writers:Type: ImplicitMetaRule: "ANY Writers"Admins:Type: ImplicitMetaRule: "MAJORITY Admins"Capabilities:<<: *ApplicationCapabilitiesOrderer: &OrdererDefaultsOrdererType: etcdraftAddresses:- 192.168.3.128:7050EtcdRaft:Consenters:- Host: 192.168.3.128Port: 7050ClientTLSCert: /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/server.crtServerTLSCert: /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/server.crtBatchTimeout: 2sBatchSize:MaxMessageCount: 10AbsoluteMaxBytes: 99 MBPreferredMaxBytes: 521 KBMaxChannels: 0Organizations:Policies:Readers:Type: ImplicitMetaRule: "ANY Readers"Writers:Type: ImplicitMetaRule: "ANY Writers"Admins:Type: ImplicitMetaRule: "MAJORITY Admins"BlockValidation:Type: ImplicitMetaRule: "ANY Writers"Channel: &ChannelDefaultsPolicies:Readers:Type: ImplicitMetaRule: "ANY Readers"Writers:Type: ImplicitMetaRule: "ANY Writers"Admins:Type: ImplicitMetaRule: "MAJORITY Admins"Capabilities:<<: *ChannelCapabilitiesProfiles:OneOrgOrdererGenesis:<<: *ChannelDefaultsOrderer:<<: *OrdererDefaultsOrganizations:- *OrdererOrg1Capabilities:<<: *OrdererCapabilitiesConsortiums:SampleConsortium:Organizations:- *Org1Channel1:Consortium: SampleConsortium<<: *ChannelDefaultsApplication:<<: *ApplicationDefaultsOrganizations:- *Org1Capabilities:<<: *ApplicationCapabilities

创建创世块:

configtxgen -profile OneOrgOrdererGenesis -channelID system-channel -outputBlock /home/songzehao/fabric/config/system-genesis-block/genesis.block

六、服务端准备

6.1、准备peer0

在节点主机创建同样的链组织节点目录:

mkdir -p ~/fabric/organizations/peerOrganizations/

从客户端主机传送peer组织目录到peer0节点主机:

scp -r /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/ songzehao@192.168.3.128:/home/songzehao/fabric/organizations/peerOrganizations

调整docker-compose.yaml中peer0相关的部分:

version: '2'volumes:orderer0.org1.example.com:peer0.org1.example.com:networks:dev:name: fabric_devservices:peer0.org1.example.com:container_name: peer0.org1.example.comimage: hyperledger/fabric-peer:2.2.0environment:#Generic peer variables- CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock- CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=fabric_dev#- FABRIC_LOGGING_SPEC=INFO- FABRIC_LOGGING_SPEC=DEBUG- CORE_PEER_TLS_ENABLED=true- CORE_PEER_PROFILE_ENABLED=false- CORE_PEER_TLS_CERT_FILE=/etc/hyperledger/fabric/tls/server.crt- CORE_PEER_TLS_KEY_FILE=/etc/hyperledger/fabric/tls/server.key- CORE_PEER_TLS_ROOTCERT_FILE=/etc/hyperledger/fabric/tls/ca.crt# Peer specific variabes- CORE_PEER_ID=peer0.org1.example.com- CORE_PEER_ADDRESS=0.0.0.0:7051- CORE_PEER_LISTENADDRESS=0.0.0.0:7051#- CORE_PEER_CHAINCODEADDRESS=0.0.0.0:7052- CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:7052- CORE_PEER_GOSSIP_BOOTSTRAP=192.168.3.128:7051- CORE_PEER_GOSSIP_EXTERNALENDPOINT=0.0.0.0:7051- CORE_PEER_LOCALMSPID=Org1MSP- CORE_OPERATIONS_LISTENADDRESS=0.0.0.0:17051volumes:- /var/run/docker.sock:/host/var/run/docker.sock- /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp:/etc/hyperledger/fabric/msp- /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls:/etc/hyperledger/fabric/tls- /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/peer0.org1.example.com:/var/hyperledger/productionworking_dir: /opt/gopath/src/github.com/hyperledger/fabric/peercommand: peer node startports:- 7051:7051- 17051:17051networks:- dev

6.2、准备orderer0

在节点主机创建同样的链组织节点目录。

mkdir -p ~/fabric/organizations/ordererOrganizations/
mkdir -p ~/fabric/config/system-genesis-block/

从客户端主机传送orderer组织目录到orderer0节点主机:

scp -r /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/ songzehao@192.168.3.128:/home/songzehao/fabric/organizations/ordererOrganizations
scp -r /home/songzehao/fabric/config/system-genesis-block/genesis.block songzehao@192.168.3.128:/home/songzehao/fabric/config/system-genesis-block/

调整docker-compose.yaml中orderer0相关的部分:

version: '2'volumes:orderer0.org1.example.com:peer0.org1.example.com:networks:dev:name: fabric_devservices:orderer0.org1.example.com:container_name: orderer0.org1.example.comimage: hyperledger/fabric-orderer:2.2.0environment:#- FABRIC_LOGGING_SPEC=INFO- FABRIC_LOGGING_SPEC=DEBUG- ORDERER_GENERAL_LISTENADDRESS=0.0.0.0- ORDERER_GENERAL_LISTENPORT=7050- ORDERER_GENERAL_GENESISMETHOD=file- ORDERER_GENERAL_GENESISFILE=/var/hyperledger/orderer/orderer.genesis.block- ORDERER_GENERAL_LOCALMSPID=OrdererOrg1MSP- ORDERER_GENERAL_LOCALMSPDIR=/var/hyperledger/orderer/msp- ORDERER_OPERATIONS_LISTENADDRESS=0.0.0.0:17050# enabled TLS- ORDERER_GENERAL_TLS_ENABLED=true- ORDERER_GENERAL_TLS_PRIVATEKEY=/var/hyperledger/orderer/tls/server.key- ORDERER_GENERAL_TLS_CERTIFICATE=/var/hyperledger/orderer/tls/server.crt- ORDERER_GENERAL_TLS_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]- ORDERER_KAFKA_TOPIC_REPLICATIONFACTOR=1- ORDERER_KAFKA_VERBOSE=true- ORDERER_GENERAL_CLUSTER_CLIENTCERTIFICATE=/var/hyperledger/orderer/tls/server.crt- ORDERER_GENERAL_CLUSTER_CLIENTPRIVATEKEY=/var/hyperledger/orderer/tls/server.key- ORDERER_GENERAL_CLUSTER_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]working_dir: /opt/gopath/src/github.com/hyperledger/fabriccommand: orderervolumes:- /home/songzehao/fabric/config/system-genesis-block/genesis.block:/var/hyperledger/orderer/orderer.genesis.block- /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp:/var/hyperledger/orderer/msp- /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/tls/:/var/hyperledger/orderer/tls- /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com:/var/hyperledger/production/ordererports:- 7050:7050- 17050:17050networks:- dev

6.3、docker-compose启动节点

客户端传送docker-compose.yaml到节点主机之后,节点主机启动节点:

docker-compose -f docker-compose.yaml up -d

七、创建应用通道channel1

7.1、创建应用通道tx交易文件

configtxgen -profile Channel1 -outputCreateChannelTx /home/songzehao/fabric/config/channel-artifacts/channel1.tx -channelID channel1

7.2、创建应用通道区块

首先需要在客户端主机配置peer0相关环境变量:

export CORE_PEER_TLS_ENABLED=true
export CORE_PEER_LOCALMSPID="Org1MSP"
export CORE_PEER_TLS_ROOTCERT_FILE=/home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
export CORE_PEER_MSPCONFIGPATH=/home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
export CORE_PEER_ADDRESS=192.168.3.128:7051
export CORE_PEER_GOSSIP_EXTERNALENDPOINT=192.168.3.128:7051

【注意】:客户端也需要一份core.yaml才能成功执行peer客户端命令。

再创建channel1区块:

peer channel create -o 192.168.3.128:7050 -c channel1 -f /home/songzehao/fabric/config/channel-artifacts/channel1.tx --outputBlock /home/songzehao/fabric/config/channel-artifacts/channel1.block --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

7.3、peer0加入应用通道

peer channel join -b /home/songzehao/fabric/config/channel-artifacts/channel1.block

7.4、获取应用通道最近的配置块

peer channel fetch config /home/songzehao/fabric/config/channel-artifacts/config_block.pb -o 192.168.3.128:7050 -c channel1 --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

7.5、生成锚节点更新配置文件

protobuf序列化(编码)后的.pb配置文件,转化为.json格式:

configtxlator proto_decode --input /home/songzehao/fabric/config/channel-artifacts/config_block.pb --type common.Block --output /home/songzehao/fabric/config/channel-artifacts/config_block.json

抽取配置部分的json,得到原始配置:

jq .data.data[0].payload.data.config /home/songzehao/fabric/config/channel-artifacts/config_block.json > /home/songzehao/fabric/config/channel-artifacts/Org1MSPconfig.json

进一步追加锚节点peer0信息到Org1MSP的values部分,得到更改后配置:

jq '.channel_group.groups.Application.groups.Org1MSP.values += {"AnchorPeers":{"mod_policy": "Admins","value":{"anchor_peers": [{"host": "192.168.3.128","port": 7051}]},"version": "0"}}' /home/songzehao/fabric/config/channel-artifacts/Org1MSPconfig.json > /home/songzehao/fabric/config/channel-artifacts/Org1MSPmodified_config.json

protobuf编码原始配置:

configtxlator proto_encode --input /home/songzehao/fabric/config/channel-artifacts/Org1MSPconfig.json --type common.Config --output /home/songzehao/fabric/config/channel-artifacts/original_config.pb

protobuf编码更改后配置:

configtxlator proto_encode --input /home/songzehao/fabric/config/channel-artifacts/Org1MSPmodified_config.json --type common.Config --output /home/songzehao/fabric/config/channel-artifacts/modified_config.pb

计算更改前后的配置差异,得到.pb的差异配置:

configtxlator compute_update --channel_id channel1 --original /home/songzehao/fabric/config/channel-artifacts/original_config.pb --updated /home/songzehao/fabric/config/channel-artifacts/modified_config.pb --output /home/songzehao/fabric/config/channel-artifacts/config_update.pb

protobuf解码为.json格式:

configtxlator proto_decode --input /home/songzehao/fabric/config/channel-artifacts/config_update.pb --type common.ConfigUpdate --output /home/songzehao/fabric/config/channel-artifacts/config_update.json

追加.json格式的差异文件内容到新包装后的.json文件:

echo '{"payload":{"header":{"channel_header":{"channel_id":"channel1", "type":2}},"data":{"config_update":'$(cat /home/songzehao/fabric/config/channel-artifacts/config_update.json)'}}}' | jq . > /home/songzehao/fabric/config/channel-artifacts/config_update_in_envelope.json

编码为Envelope类型的新的交易文件:

configtxlator proto_encode --input /home/songzehao/fabric/config/channel-artifacts/config_update_in_envelope.json --type common.Envelope --output /home/songzehao/fabric/config/channel-artifacts/Org1MSPanchors.tx

7.6、提交更新通道配置交易

peer channel update -o 192.168.3.128:7050 -c channel1 -f /home/songzehao/fabric/config/channel-artifacts/Org1MSPanchors.tx --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

八、部署链码发送交易

8.1、编译打包链码

fabric-samples示例工程https://github.com/hyperledger/fabric-samples/tree/v2.2.0/拉下来:

git clone -b v2.2.0 https://gitee.com/hyperledger/fabric-samples.git

以其中一个asset-transfer-basic链码举例,编译该java链码,并打包为basic.tar.gz:

rm -rf ~/fabric/fabric-samples/asset-transfer-basic/chaincode-java/build/install/./gradlew installDistpeer lifecycle chaincode package ~/fabric/config/basic.tar.gz --path ~/fabric/fabric-samples/asset-transfer-basic/chaincode-java/build/install/basic --lang java --label basic_1.0

8.2、部署链码

进行链码安装:

peer lifecycle chaincode install /home/songzehao/fabric/config/basic.tar.gz

查看已安装的链码:

peer lifecycle chaincode queryinstalled

批准链码定义:

peer lifecycle chaincode approveformyorg -o 192.168.3.128:7050 --channelID channel1 --name basic --version 1.0 --package-id basic_1.0:67b9d7ef205254d9b8ff59e5904d1d18a27f74d7d1679abe0e7ccde064826773 --sequence 1 --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

检查批准状态:

peer lifecycle chaincode queryapproved -C channel1 -n basic

检查提交就绪状态:

peer lifecycle chaincode checkcommitreadiness --channelID channel1 --name basic --version 1.0 --sequence 1 --output json

提交到peer0:

peer lifecycle chaincode commit -o 192.168.3.128:7050 --channelID channel1 --name basic --peerAddresses 192.168.3.128:7051 --tlsRootCertFiles /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --version 1.0 --sequence 1 --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

检查提交状态:

peer lifecycle chaincode querycommitted --channelID channel1 --name basic --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem

docker验证新的链代码是否已在您的对等点192.168.3.128上提交启动:

docker ps --no-trunc
CONTAINER ID                                                       IMAGE                                                                                                                                                                    COMMAND                                                     CREATED              STATUS              PORTS     NAMES
660ab24842f1c96dc644f931b6540befca1cfb953399d880d9fe6e02560e4dc0   dev-peer0.org1.example.com-basic_1.0-67b9d7ef205254d9b8ff59e5904d1d18a27f74d7d1679abe0e7ccde064826773-4ae135e5fa18d99cbd8dc7e8907079b31a3f779d0137e69204d3307d30236441   "/root/chaincode-java/start --peerAddress localhost:7052"   About a minute ago   Up About a minute             dev-peer0.org1.example.com-basic_1.0-67b9d7ef205254d9b8ff59e5904d1d18a27f74d7d1679abe0e7ccde064826773

8.3、发送交易

发交易,初始化资产(调用链码的初始化方法InitLedger):

peer chaincode invoke -o 192.168.3.128:7050 -C channel1 -n basic --peerAddresses 192.168.3.128:7051 --tlsRootCertFiles /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem -c '{"function":"InitLedger","Args":[]}'

查询初始化后的资产(调用链码的GetAllAssets方法):

peer chaincode invoke -o 192.168.3.128:7050 -C channel1 -n basic --peerAddresses 192.168.3.128:7051 --tlsRootCertFiles /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem -c '{"function":"GetAllAssets","Args":[]}'

发交易,新增资产(调用链码的初始化方法CreateAsset):

peer chaincode invoke -o 192.168.3.128:7050 -C channel1 -n basic --peerAddresses 192.168.3.128:7051 --tlsRootCertFiles /home/songzehao/fabric/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --tls --cafile /home/songzehao/fabric/organizations/ordererOrganizations/org1.example.com/orderers/orderer0.org1.example.com/msp/tlscacerts/tlsca.org1.example.com-cert.pem -c '{"function":"CreateAsset","Args":["asset7", "pink", "18", "Jay", "800"]}'

这篇关于Fabric建链docker-compose方式(客户端与节点主机分离)的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!



http://www.chinasem.cn/article/328695

相关文章

异构存储(冷热数据分离)

异构存储主要解决不同的数据,存储在不同类型的硬盘中,达到最佳性能的问题。 异构存储Shell操作 (1)查看当前有哪些存储策略可以用 [lytfly@hadoop102 hadoop-3.1.4]$ hdfs storagepolicies -listPolicies (2)为指定路径(数据存储目录)设置指定的存储策略 hdfs storagepolicies -setStoragePo

【前端学习】AntV G6-08 深入图形与图形分组、自定义节点、节点动画(下)

【课程链接】 AntV G6:深入图形与图形分组、自定义节点、节点动画(下)_哔哩哔哩_bilibili 本章十吾老师讲解了一个复杂的自定义节点中,应该怎样去计算和绘制图形,如何给一个图形制作不间断的动画,以及在鼠标事件之后产生动画。(有点难,需要好好理解) <!DOCTYPE html><html><head><meta charset="UTF-8"><title>06

如何用Docker运行Django项目

本章教程,介绍如何用Docker创建一个Django,并运行能够访问。 一、拉取镜像 这里我们使用python3.11版本的docker镜像 docker pull python:3.11 二、运行容器 这里我们将容器内部的8080端口,映射到宿主机的80端口上。 docker run -itd --name python311 -p

内核启动时减少log的方式

内核引导选项 内核引导选项大体上可以分为两类:一类与设备无关、另一类与设备有关。与设备有关的引导选项多如牛毛,需要你自己阅读内核中的相应驱动程序源码以获取其能够接受的引导选项。比如,如果你想知道可以向 AHA1542 SCSI 驱动程序传递哪些引导选项,那么就查看 drivers/scsi/aha1542.c 文件,一般在前面 100 行注释里就可以找到所接受的引导选项说明。大多数选项是通过"_

浅谈主机加固,六种有效的主机加固方法

在数字化时代,数据的价值不言而喻,但随之而来的安全威胁也日益严峻。从勒索病毒到内部泄露,企业的数据安全面临着前所未有的挑战。为了应对这些挑战,一种全新的主机加固解决方案应运而生。 MCK主机加固解决方案,采用先进的安全容器中间件技术,构建起一套内核级的纵深立体防护体系。这一体系突破了传统安全防护的局限,即使在管理员权限被恶意利用的情况下,也能确保服务器的安全稳定运行。 普适主机加固措施:

day-51 合并零之间的节点

思路 直接遍历链表即可,遇到val=0跳过,val非零则加在一起,最后返回即可 解题过程 返回链表可以有头结点,方便插入,返回head.next Code /*** Definition for singly-linked list.* public class ListNode {* int val;* ListNode next;* ListNode() {}*

用命令行的方式启动.netcore webapi

用命令行的方式启动.netcore web项目 进入指定的项目文件夹,比如我发布后的代码放在下面文件夹中 在此地址栏中输入“cmd”,打开命令提示符,进入到发布代码目录 命令行启动.netcore项目的命令为:  dotnet 项目启动文件.dll --urls="http://*:对外端口" --ip="本机ip" --port=项目内部端口 例: dotnet Imagine.M

计算机毕业设计 大学志愿填报系统 Java+SpringBoot+Vue 前后端分离 文档报告 代码讲解 安装调试

🍊作者:计算机编程-吉哥 🍊简介:专业从事JavaWeb程序开发,微信小程序开发,定制化项目、 源码、代码讲解、文档撰写、ppt制作。做自己喜欢的事,生活就是快乐的。 🍊心愿:点赞 👍 收藏 ⭐评论 📝 🍅 文末获取源码联系 👇🏻 精彩专栏推荐订阅 👇🏻 不然下次找不到哟~Java毕业设计项目~热门选题推荐《1000套》 目录 1.技术选型 2.开发工具 3.功能

深入理解RxJava:响应式编程的现代方式

在当今的软件开发世界中,异步编程和事件驱动的架构变得越来越重要。RxJava,作为响应式编程(Reactive Programming)的一个流行库,为Java和Android开发者提供了一种强大的方式来处理异步任务和事件流。本文将深入探讨RxJava的核心概念、优势以及如何在实际项目中应用它。 文章目录 💯 什么是RxJava?💯 响应式编程的优势💯 RxJava的核心概念

从状态管理到性能优化:全面解析 Android Compose

文章目录 引言一、Android Compose基本概念1.1 什么是Android Compose?1.2 Compose的优势1.3 如何在项目中使用Compose 二、Compose中的状态管理2.1 状态管理的重要性2.2 Compose中的状态和数据流2.3 使用State和MutableState处理状态2.4 通过ViewModel进行状态管理 三、Compose中的列表和滚动