XiaoGang2015 opened a new issue, #2708:
URL: https://github.com/apache/brpc/issues/2708
**问题描述**
如何使用 grpc 客户端通过 ssl 连接 brpc 服务端？
我尝试的方法：
客户端相关代码：
```c++
grpc_impl::ChannelArguments ag;
ag.SetMaxReceiveMessageSize(DATA_BUF_SIZE);
ag.SetMaxSendMessageSize(DATA_BUF_SIZE);
grpc::SslCredentialsOptions sslOptions;
sslOptions.pem_root_certs = rC; // 对应的 文件
sslOptions.pem_private_key = pc; // 对应的文件
sslOptions.pem_cert_chain = cc; // 对应的文件
auto cha = grpc::CreateCustomChannel(ipAddr,
grpc::SslCredentials(sslOptions), ag);
std::unique_ptr<bimmsg::BimService::Stub>
stub_(bimmsg::BimService::NewStub(cha));
// send msg
grpc::ClientContext context;
bimmsg::ProjStandardDataResp reply;
grpc::Status status = stub_->ProjStandardDataRpc(&context, req, &reply);
```
服务端相关代码：
```c++
options.mutable_ssl_options()->default_cert.certificate =
"/home/xiaogang/CA/server.crt";
options.mutable_ssl_options()->default_cert.private_key =
"/home/xiaogang/CA/server.key";
options.mutable_ssl_options()->strict_sni = false;
options.mutable_ssl_options()->verify.ca_file_path =
"/home/xiaogang/CA/ca.crt";
options.mutable_ssl_options()->verify.verify_depth = 1;
options.mutable_ssl_options()->alpns = "h2";
options.mutable_ssl_options()->disable_ssl3 = true;
```
**返回错误**
grpc 返回的错误码 unavailable（14）, failed to connect all address.
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