安装Fabric CA

使用下面的命令在$GOPATH/bin目录下安装fabric-ca-server和fabric-ca-client：

go get -u github.com/hyperledger/fabric-ca/cmd/...

注意：如果你已经克隆了fabric-ca仓库，要确保在运行上述命令时 你选中了master分支，否则你可能看到如下错误：

<gopath>/src/github.com/hyperledger/fabric-ca; git pull --ff-only
There is no tracking information for the current branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.

    git pull <remote> <branch>

If you wish to set tracking information for this branch you can do so with:

    git branch --set-upstream-to=<remote>/<branch> tlsdoc

package github.com/hyperledger/fabric-ca/cmd/fabric-ca-client: exit status 1