Docker - 实战TLS加密通讯

使用说明

演示环境(centos7,docker17.06.0-ce)

创建一个文件夹

mkdir /ssl      

cd /ssl      

创建ca密钥

openssl genrsa -aes256 -out ca-key.pem 4096      

创建ca证书

openssl req -new -x509 -days 1000 -key ca-key.pem -sha256 -subj "/CN=*" -out ca.pem      

创建服务器私钥

openssl genrsa -out server-key.pem 4096      

签名私钥

openssl req -subj "/CN=*" -sha256 -new -key server-key.pem -out server.csr      

使用ca证书与私钥证书签名

openssl x509 -req -days 1000 -sha256 -in server.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out server-cert.pem      

生成客户端密钥

openssl genrsa -out key.pem 4096      

签名客户端

openssl req -subj "/CN=client" -new -key key.pem -out client.csr      

创建配置文件

echo extendedKeyUsage=clientAuth > extfile.cnf      

签名证书

openssl x509 -req -days 1000 -sha256 -in client.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out cert.pem -extfile extfile.cnf      

删除多余文件

rm -rf ca.srl client.csr extfile.cnf server.csr      

配置docker

cat /lib/systemd/system/docker.service      

将里面的

ExecStart=/usr/bin/dockerd      

修改为

ExecStart=/usr/bin/dockerd --tlsverify --tlscacert=/ssl/ca.pem --tlscert=/ssl/server-cert.pem --tlskey=/ssl/server-key.pem -H tcp://0.0.0.0:2376 -H unix:///var/run/docker.sock      

重启后台进程

systemctl daemon-reload      

重启docker服务

systemctl restart docker      

将 /ssl/ca.pem /ssl/cert.pem /ssl/key.pem 三个文件复制到另一台主机

直接使用IP地扯连接如出现如下错误

cannot validate certificate for x.x.x.x because it doesn't contain any IP SANs      

docker --tlsverify --tlscacert=ca.pem --tlscert=cert.pem --tlskey=key.pem -H tcp://localhost:2376 version      

Client:
 Version:      17.06.0-ce
 API version:  1.30
 Go version:   go1.8.3
 Git commit:   02c1d87
 Built:        Fri Jun 23 21:20:36 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.06.0-ce
 API version:  1.30 (minimum version 1.12)
 Go version:   go1.8.3
 Git commit:   02c1d87
 Built:        Fri Jun 23 21:21:56 2017
 OS/Arch:      linux/amd64
 Experimental: false