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This article focuses on "how to build Fabric in Linux". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "the method of building Fabric in Linux".

Fabric is a super ledger framework contributed by IBM. It is an implementation of a block chain technology which is composed of existing mature technologies. It is a modular architecture that allows pluggable implementation of various functions. It has powerful container technology to host intelligent contracts written in various mainstream languages.

I. Environmental consolidation

1. CentOS upgrade the kernel

View the CentOS system

Cat / etc/redhat-release

The results show (version 7.4)

CentOS Linux release 7.4.1708 (Core) checks the current CentOS system kernel version

Uname-sr

The results show (version 4.15)

Linux 4.15.14-1.el7.elrepo.x86_64 ascending kernel requires CentOS to allow the use of ELRepo, which is a third-party repository that can upgrade the kernel to the latest mainline stable kernel startup ELRepo, run the following command

Rpm-- import https://www.elrepo.org/RPM-GPG-KEY-elrepo.orgrpm-Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

After the repository is enabled, you can use the following command to list the available kernel-related packages:

Yum-disablerepo= "*"-enablerepo= "elrepo-kernel" list available

Next, install the latest mainline stable kernel

Yum-enablerepo=elrepo-kernel install kernel-ml

View available kernels

Cat / boot/grub2/grub.cfg | grep menuentry

The results show that:

Linux 4.15.14-1.el7.elrepo.x86_64 [root@VM_0_14_centos hyperledger] # cat / boot/grub2/grub.cfg | grep menuentryif [x "${feature_menuentry_id}" = xy] Then menuentry_id_option= "- id" menuentry_id_option= "export menuentry_id_optionmenuentry 'CentOS Linux (4.15.14-1.el7.elrepo.x86_64) 7 (Core)'-- class centos-- class gnu-linux-- class gnu--class os-- unrestricted $menuentry_id_option 'gnulinux-3.10.0-327.el7.x86_64-advanced-49f819fd-e56d-48a4-86d3-7ebe0a68ec88' {menuentry' CentOS Linux (0-rescue-f9d400c5e1e8c3a8209e990d887d4ac1) 7 ( Core)'--class centos-- class gnu-linux-- class gnu--class os-- unrestricted $menuentry_id_option 'gnulinux-0-rescue-f9d400c5e1e8c3a8209e990d887d4ac1-advanced-49f819fd-e56d-48a4-86d3-7ebe0a68ec88' {

Replace the kernel you want to use, for example:

CentOS Linux (4.15.14-1.el7.elrepo.x86_64) 7 (Core) grub2-set-default 'CentOS Linux (4.15.14-1.el7.elrepo.x86_64) 7 (Core)

'check whether the kernel startup item is set successfully

Grub2-editenv list

The results show that:

Saved_entry=CentOS Linux (4.15.14-1.el7.elrepo.x86_64) 7 (Core)

Query redundant kernels

Rpm-qa | grep kernel

Delete redundant kernels

Yum remove

The kernel you want to delete can restart the system.

Reboot II. Environment installation and configuration

1. Docker installation

1.1 install Docker CE version, uninstall the old one first if there is any

Sudo yum remove docker\ docker-common\ docker-selinux\ docker-engine

1.2 start installing Docker ce

Sudo yum install-y yum-utils device-mapper-persistent-data lvm2 $sudo yum-config-manager\-add-repo\ https://download.docker.com/linux/centos/docker-ce.reposudo yum-config-manager-enable docker-ce-edgesudo yum-config-manager-enable docker-ce-testsudo yum-config-manager-disable docker-ce-edgesudo yum makecache fastsudo yum install docker-ce

1.3 check whether the installation is successful

[root@VM_0_14_centos hyperledger] # docker-- versionDocker version 18.04.0-ce-rc1, build 0c7f7c6

1.4 start docker

/ bin/systemctl start docker.service

2. Docker-Compose installation

The server is required to support curl. If the server does not support curl, you need to install curl dependencies by doing the following

Yum install curl

2.1 install the latest version according to the github project pointed to on the official website. Currently, the latest version of docker-compose is 1.15.0 to execute commands.

Curl-L https://github.com/docker/compose/releases/download/1.15.0/docker-compose-`uname-s`-`uname-m` > / usr/local/bin/docker-compose

Give authority

Chmod + x / usr/local/bin/docker-compose

2.2. View the version

[root@VM_0_14_centos hyperledger] # docker-compose-- versiondocker-compose version 1.15.0, build e12f3b9

Docker common commands

Kill all running containers

Docker kill $(docker ps-a-Q)

Delete all containers that have been stopped

Docker rm $(docker ps-a-Q)

Delete all mirrors

Docker rmi $(docker images-Q)

Force deletion of all mirrors

Docker rmi-f $(docker images-Q)

3. GO language installation

GO installation link = = the final environment is as follows =

Third, download the source code

1. First go to the path directory of go

Cd $GOPATH

2. Create a new folder

Mkdir-p src/github.com/hyperledger

3. Then go to the following path

/ opt/gopath/src/github.com/hyperledger

4. Download fabric

Git clone https://github.com/hyperledger/fabric.git

Go to the fabric directory to view the git version of fabric

Cd fabric/git branch-a

The result shows (currently using a master branch)

* master remotes/origin/HEAD-> origin/master remotes/origin/feature/ca remotes/origin/feature/convergence remotes/origin/master remotes/origin/release-1.0 remotes/origin/release-1.1 remotes/origin/v0.6 remotes/origin/v1.0.0-preview

4.2. Switch to the release-1.1 branch

Git checkout release-1.1

Check to see if the switch is successful

Git branch-a

The results show that

Master* release-1.1 remotes/origin/HEAD-> origin/master remotes/origin/feature/ca remotes/origin/feature/convergence remotes/origin/master remotes/origin/release-1.0 remotes/origin/release-1.1 remotes/origin/v0.6 remotes/origin/v1.0.0-preview

Download fabric-samples 5.1and go to a directory at the same level as fabric

Cd $GOPATH/src/github.com/hyperledger

5.2. Download the source code

Git clone https://github.com/hyperledger/fabric-samples.git

5.3, go to the fabric-samples directory, view the branches and switch to 1.1

Cd fabric-samples/git branch-agit checkout release-1.1

The structure after the download should look like the following figure

Download the image and the binaries to be executed

1. Go to the fabric-samples directory = = if the network environment is good enough to access the external network, you can directly execute the following statement to download all images and binary files to be executed = =

Curl-sSL https://goo.gl/6wtTN5 | bash-s 1.1.0

These two files, bin and config, will be added after the download is completed.

2. If you can't connect to the public network, click the following steps (download image and binary file) to enter the scripts in the fabric directory and modify the bootstrap.sh

Cd fabric/scripts/vim bootstrap.sh

Modify the circle in the diagram to version 1.1.0, and then save

Image

Run the bootstrap.sh download image (wait a few minutes)

. / bootstrap.sh

3. Download the binary execution file and enter it into the fabric-samples file

Cd fabric-samples/

Download version 1.1.0 binaries through wget

Wget https://nexus.hyperledger.org/content/repositories/releases/org/hyperledger/fabric/hyperledger-fabric/linux-amd64-1.1.0/hyperledger-fabric-linux-amd64-1.1.0.tar.gz

If you extract the downloaded files, you will find that there are two more folders, bin and config.

Tar-zxvf hyperledger-fabric-linux-amd64-1.1.0.tar.gz

Configure bin to the environment

Cd bin/pwdvim / etc/profilesource / etc/profile

Modified item

5. Running files

Enter into fabric-samples/first-network

Cd fabric-samples/first-network/

Generate configuration file

. / byfn.sh-m generate

If you choose to agree, mychannel will be generated by default.

Start-up project

. / byfn.sh-m up

The result of success:

Close after success

. / byfn.sh-m down

= = to modify the docker-compose-base.yaml of the base folder for Ali CVM, add-GODEBUG=netdns=go under all environment, as shown in the following figure =

At this point, I believe you have a deeper understanding of "the method of building Fabric in Linux". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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