前段时间写了一篇博文《centos下安装grpc》,当时安装是成功了,但后来我编译里面带的examples时,发现总是报undefined reference错误,我设了各种路径也还是报错。看来这种安装方式不靠谱,应该是安装有问题。
后来我根据google的官方文档安装,安装、编译都成功了。但github下载安装grpc是很缓慢的,所以我去镜像网站gitee上下载安装。下面开始干活!
一、grpc的安装
下载源码
cd /usr/local/src
git clone https://gitee.com/zqx5449/grpc.git
cd grpc
git submodule update --init //会拉取third_party中的代码
安装依赖
yum install -y gcc-c++ autoconf libtool
yum groupinstall -y "Development Tools"
编译protobuf
cd third_party/protobuf/ //上级目录为grpc
./autogen.sh
./configure
make -j$(nproc) // 安装grpc protobuf支持
make install
ldconfig // 重要 刷新动态库的缓存
设置路径
export MY_INSTALL_DIR=/usr/local
export PATH="$MY_INSTALL_DIR/bin:$PATH"
安装grpc
cd grpc
mkdir -p cmake/build
pushd cmake/build
cmake -DgRPC_INSTALL=ON \
-DgRPC_BUILD_TESTS=OFF \
-DCMAKE_INSTALL_PREFIX=$MY_INSTALL_DIR \
../..
make -j 4
make install
popd
二、测试grpc
测试自带的example
cd examples/cpp/helloworld
mkdir -p cmake/build
pushd cmake/build
cmake -DCMAKE_PREFIX_PATH=$MY_INSTALL_DIR ../..
make -j$(nproc)
运行server:
./greeter_server
测试自己写的demo
(1)设置路径
export GRPCROOT=/usr/local/src/grpc #注意这个目录是我的grpc的目录,你需要修改成为你的目录
export PATH=$PATH:$GRPCROOT/bins/opt:$GRPCROOT/bins/opt/protobuf
export CPATH=$GRPCROOT/include:$GRPCROOT/third_party/protobuf/src
export LIBRARY_PATH=$GRPCROOT/libs/opt:$GRPCROOT/libs/opt/protobuf
export PKG_CONFIG_PATH=$GRPCROOT/libs/opt/pkgconfig:$GRPCROOT/third_party/protobuf
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$GRPCROOT/libs/opt:/usr/local/lib
(2)定义proto文件
hello.proto
// protobuf版本
syntax = "proto3";
// rpc请求的定义
message HelloRequest {
optional string name = 1;
}
// rpc响应的定义
message HelloReply {
optional string message = 1;
}
// rpc服务的定义,两个函数
service HelloWorld {
rpc SayHello (HelloRequest) returns (HelloReply) {}
rpc SayHelloAgain (HelloRequest) returns (HelloReply) {}
}
(3)编译proto文件
protoc --cpp_out=. --grpc_out=. --plugin=protoc-gen-grpc=`which grpc_cpp_plugin` hello.proto
(4)server.cc
#include "hello.grpc.pb.h"
#include <string>
#include <grpcpp/grpcpp.h>
// rpc服务实现
class HelloServiceImpl : public HelloWorld::Service
{
grpc::Status SayHello(grpc::ServerContext* context, const HelloRequest* req, HelloReply* rsp)
{
std::cout << "Request SayHello From " << context->peer() << std::endl;
rsp->set_message("hello " + req->name() + "!");
return grpc::Status::OK;
}
grpc::Status SayHelloAgain(grpc::ServerContext* context, const HelloRequest* req, HelloReply* rsp)
{
std::cout << "Request SayHelloAgain From " << context->peer() << std::endl;
rsp->set_message("hello " + req->name() + " again!!");
return grpc::Status::OK;
}
};
// 启动运行
int main(int argc, char** argv)
{
std::string address("localhost:5000");
HelloServiceImpl service;
grpc::ServerBuilder builder;
builder.AddListeningPort(address, grpc::InsecureServerCredentials());
builder.RegisterService(&service);
std::unique_ptr<grpc::Server> server(builder.BuildAndStart());
std::cout << "Server Listening on port: " << address << std::endl;
server->Wait();
return 0;
}
(5)client.cc
#include "hello.grpc.pb.h"
#include <string>
#include <iostream>
#include <sstream>
#include <grpcpp/grpcpp.h>
// 客户端
class HelloClient
{
public:
HelloClient(std::shared_ptr<grpc::Channel> channel) : _stub(HelloWorld::NewStub(channel))
{}
std::string SayHello(const std::string& name)
{
HelloRequest req;
HelloReply rsp;
req.set_name(name);
grpc::ClientContext context;
grpc::Status status = _stub->SayHello(&context, req, &rsp);
if(status.ok())
{
return rsp.message();
}
else
{
std::ostringstream out;
out << status.error_code() << " : " << status.error_message();
return out.str();
}
}
std::string SayHelloAgain(const std::string& name)
{
HelloRequest req;
HelloReply rsp;
req.set_name(name);
grpc::ClientContext context;
grpc::Status status = _stub->SayHelloAgain(&context, req, &rsp);
if(status.ok())
{
return rsp.message();
}
else
{
std::ostringstream out;
out << status.error_code() << " : " << status.error_message();
return out.str();
}
}
private:
std::unique_ptr<HelloWorld::Stub> _stub;
};
// 调用rpc
int main(int argc, char** argv)
{
std::string address("0.0.0.0:5000");
HelloClient client(grpc::CreateChannel(address, grpc::InsecureChannelCredentials()));
std::string name("bazel");
std::cout << client.SayHello(name) << std::endl;
std::cout << client.SayHelloAgain(name) << std::endl;
return 0;
}
(6)编译
g++ -std=c++11 `pkg-config --cflags protobuf grpc` -c -o hello.grpc.pb.o hello.grpc.pb.cc
g++ -std=c++14 `pkg-config --cflags protobuf grpc` -c -o hello.pb.o hello.pb.cc
g++ -std=c++14 `pkg-config --cflags protobuf grpc` -c -o server.o server.cc
g++ hello.grpc.pb.o hello.pb.o server.o -L/usr/local/lib `pkg-config --libs --static protobuf grpc++` -pthread -Wl,--no-as-needed -lgrpc++_reflection -Wl,--as-needed -ldl -o server
g++ -std=c++14 `pkg-config --cflags protobuf grpc` -c -o client.o client.cc
g++ hello.grpc.pb.o hello.pb.o client.o -L/usr/local/lib `pkg-config --libs --static protobuf grpc++` -pthread -Wl,--no-as-needed -lgrpc++_reflection -Wl,--as-needed -ldl -o client
(7)运行
./server
./client
参考: