Docker启用TLS实现安全配置的步骤

前言

之前开启了docker的2375 Remote API，接到公司安全部门的要求，需要启用授权，翻了下官方文档

启用TLS

在docker服务器，生成CA私有和公共密钥

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

									Generating RSA private key, 4096 bit long modulus

									............................................................................................................................................................................................++

									........++

									e is 65537 (0x10001)

									Enter pass phrase for ca-key.pem:

									Verifying - Enter pass phrase for ca-key.pem:

									$ openssl req -new -x509 -days 365 -key ca-key.pem -sha256 -out ca.pem

									Enter pass phrase for ca-key.pem:

									You are about to be asked to enter information that will be incorporated

									into your certificate request.

									What you are about to enter is what is called a Distinguished Name or a DN.

									There are quite a few fields but you can leave some blank

									For some fields there will be a default value,

									If you enter '.', the field will be left blank.

									-----

									Country Name (2 letter code) [AU]:

									State or Province Name (full name) [Some-State]:Queensland

									Locality Name (eg, city) []:Brisbane

									Organization Name (eg, company) [Internet Widgits Pty Ltd]:Docker Inc

									Organizational Unit Name (eg, section) []:Sales

									Common Name (e.g. server FQDN or YOUR name) []:$HOST

									Email Address []:Sven@home.org.au

有了CA后，可以创建一个服务器密钥和证书签名请求(CSR)

$HOST 是你的服务器ip

									$ openssl genrsa -out server-key.pem 4096

									Generating RSA private key, 4096 bit long modulus

									.....................................................................++

									.................................................................................................++

									e is 65537 (0x10001)

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

接着，用CA来签署公共密钥:

									$ echo subjectAltName = DNS:$HOST,IP:$HOST:127.0.0.1 >> extfile.cnf

									 $ echo extendedKeyUsage = serverAuth >> extfile.cnf

生成key：

									$ openssl x509 -req -days 365 -sha256 -in server.csr -CA ca.pem -CAkey ca-key.pem \

									 -CAcreateserial -out server-cert.pem -extfile extfile.cnf

									Signature ok

									subject=/CN=your.host.com

									Getting CA Private Key

									Enter pass phrase for ca-key.pem:

创建客户端密钥和证书签名请求:

									$ openssl genrsa -out key.pem 4096

									Generating RSA private key, 4096 bit long modulus

									.........................................................++

									................++

									e is 65537 (0x10001)

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

修改extfile.cnf：

1	`echo` `extendedKeyUsage = clientAuth > extfile-client.cnf`

生成签名私钥：

									$ openssl x509 -req -days 365 -sha256 -in client.csr -CA ca.pem -CAkey ca-key.pem \

									 -CAcreateserial -out cert.pem -extfile extfile-client.cnf

									Signature ok

									subject=/CN=client

									Getting CA Private Key

									Enter pass phrase for ca-key.pem:

将Docker服务停止，然后修改docker服务文件

									[Unit]

									Description=Docker Application Container Engine

									Documentation=http://docs.docker.io

									[Service]

									Environment="PATH=/opt/kube/bin:/bin:/sbin:/usr/bin:/usr/sbin"

									ExecStart=/opt/kube/bin/dockerd --tlsverify --tlscacert=/root/docker/ca.pem --tlscert=/root/docker/server-cert.pem --tlskey=/root/docker/server-key.pem -H unix:///var/run/docker.sock -H tcp://0.0.0.0:2375

									ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT

									ExecReload=/bin/kill -s HUP $MAINPID

									Restart=on-failure

									RestartSec=5

									LimitNOFILE=infinity

									LimitNPROC=infinity

									LimitCORE=infinity

									Delegate=yes

									KillMode=process

									[Install]

									WantedBy=multi-user.target

然后重启服务

1 2	`systemctl daemon-reload` `systemctl restart docker.service`

重启后查看服务状态：

									systemctl status docker.service

									● docker.service - Docker Application Container Engine

									  Loaded: loaded (/etc/systemd/system/docker.service; enabled; vendor preset: enabled)

									  Active: active (running) since Thu 2019-08-08 19:22:26 CST; 1 min ago

已经生效。

使用证书连接：

复制ca.pem,cert.pem,key.pem三个文件到客户端

1	`docker --tlsverify --tlscacert=ca.pem --tlscert=cert.pem --tlskey=key.pem -H=$HOST:2375 version连接即可`

docker-java 启用TLS

项目里使用docker的java客户端docker-java调用docker，为了支持TLS，在创建客户端时，需要增加TLS设置。

首先将ca.pem cert.pem key.pem这三个文件拷贝到本地，例如E:\\docker\\",

然后DefaultDockerClientConfig里withDockerTlsVerify设为true，并设置certpath为刚拷贝的目录。

									DefaultDockerClientConfig.Builder builder =

									        DefaultDockerClientConfig.createDefaultConfigBuilder()

									          .withDockerHost("tcp://" + server + ":2375")

									          .withApiVersion("1.30");

									      if (containerConfiguration.getDockerTlsVerify()) {

									        builder = builder.withDockerTlsVerify(true)

									          .withDockerCertPath("E:\\docker\\");

									      }

									  return DockerClientBuilder.getInstance(builder.build()).build()

大工搞定。

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，谢谢大家对服务器之家的支持。

原文链接：https://www.cnblogs.com/xiaoqi/p/docker-tls.html

Docker启用TLS实现安全配置的步骤

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