一、Docker CA认证

使用idea+docker部署一时爽, 结果服务器由于2375端口被黑, 服务器变成了别人的打工仔, 防止服务器变成别人的挖矿专员,这时候就必须要配置docker的ca证书

官方例子

1、创建ca文件夹，存放CA私钥和公钥

[root@localhost ~]# mkdir -p /usr/local/ca
[root@localhost ~]# cd /usr/local/ca/

2、创建密码

需要连续输入两次相同的密码

[root@localhost ca]# 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:

3、依次输入密码、国家、省、市、组织名称等

[root@localhost ca]# openssl req -new -x509 -days 365 -key ca-key.pem -sha256 -out ca.pem
Enter pass phrase for ca-key.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) [XX]:CN
State or Province Name (full name) []:zj
Locality Name (eg, city) [Default City]:hz
Organization Name (eg, company) [Default Company Ltd]:qdsg
Organizational Unit Name (eg, section) []:qdsg
Common Name (eg, your name or your server's hostname) []:qdsg
Email Address []:1@qq.com
[root@localhost ca]# openssl genrsa -out server-key.pem 4096
Generating RSA private key, 4096 bit long modulus
...........................++
................++
e is 65537 (0x10001)

4、生成server-key.pem

[root@localhost ca]# openssl genrsa -out server-key.pem 4096
Generating RSA private key, 4096 bit long modulus
.................................................................................................................................................++
.................................................++
e is 65537 (0x10001)

5、把下面的$Host换成你自己服务器外网的IP或者域名

openssl req -subj “/CN=$HOST” -sha256 -new -key server-key.pem -out server.csr
比如
openssl req -subj “/CN=192.168.1.106” -sha256 -new -key server-key.pem -out server.csr
或
openssl req -subj “/CN=www.baidu.com” -sha256 -new -key server-key.pem -out server.csr

我这里使用局域网进行测试

[root@localhost ca]# openssl req -subj "/CN=192.168.1.106" -sha256 -new -key server-key.pem -out server.csr

6、配置白名单

也就是你接下来要允许那些ip可以连接到服务器的docker，因为已经是ssl连接，所以我推荐配置0.0.0.0,也就是所有ip都可以连接(但只有拥有证书的才可以连接成功)，这样配置好之后公司其他人也可以使用。如果你不想这样，那你可以配置ip，用逗号分隔开。下面的$Host依旧是你服务器外网的IP或者域名，请自行替换。

注意！！！！这里我踩了坑
如果你填写的是ip地址的话命令如下echo subjectAltName = IP:$HOST,IP:0.0.0.0>>extfile.cnf如果你填写的是域名的话命令如下echosubjectAltName=DNS:$HOST,IP:0.0.0.0 >> extfile.cnf
我这里使用局域网进行测试

[root@localhost ca]# echo subjectAltName = IP:192.168.1.106,IP:0.0.0.0 >> extfile.cnf

7、执行命令，将Docker守护程序密钥的扩展使用属性设置为仅用于服务器身份验证

[root@localhost ca]# echo extendedKeyUsage = serverAuth >> extfile.cnf

8、执行命令，并输入之前设置的密码，生成签名证书

[root@localhost ca]# 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=192.168.1.106
Getting CA Private Key
Enter pass phrase for ca-key.pem:

9、生成客户端的key.pem，到时候把生成好的几个公钥私钥拷出去即可

[root@localhost ca]# openssl genrsa -out key.pem 4096
Generating RSA private key, 4096 bit long modulus
...........................................................................................................................................................................................................................................................................................................................................................................++
......................................................................................................................................++
e is 65537 (0x10001)

10、执行命令

[root@localhost ca]# openssl req -subj '/CN=client' -new -key key.pem -out client.csr

11、执行命令，要使密钥适合客户端身份验证，请创建扩展配置文件

[root@localhost ca]# echo extendedKeyUsage = clientAuth >> extfile.cnf

11、执行命令，要使密钥适合客户端身份验证，请创建扩展配置文件

[root@localhost ca]# echo extendedKeyUsage = clientAuth >> extfile.cnf

12、生成cert.pem,需要输入前面设置的密码，生成签名证书

[root@localhost ca]# openssl x509 -req -days 365 -sha256 -in client.csr -CA ca.pem -CAkey ca-key.pem \-CAcreateserial -out cert.pem -extfile extfile.cnf
Signature ok
subject=/CN=client
Getting CA Private Key
Enter pass phrase for ca-key.pem:

13、删除不需要的文件，两个证书签名请求

[root@localhost ca]# rm -v client.csr server.csr
rm：是否删除普通文件 "client.csr"？y
已删除"client.csr"

14、修改权限，要保护您的密钥免受意外损坏，请删除其写入权限。要使它们只能被您读取，更改文件模式

[root@localhost ca]# chmod -v 0400 ca-key.pem key.pem server-key.pem
mode of "ca-key.pem" changed from 0644 (rw-r--r--) to 0400 (r--------)
mode of "key.pem" changed from 0644 (rw-r--r--) to 0400 (r--------)
mode of "server-key.pem" changed from 0644 (rw-r--r--) to 0400 (r--------)

证书可以是对外可读的，删除写入权限以防止意外损坏

[root@localhost ca]# chmod -v 0444 ca.pem server-cert.pem cert.pem
mode of "ca.pem" changed from 0644 (rw-r--r--) to 0444 (r--r--r--)
mode of "server-cert.pem" changed from 0644 (rw-r--r--) to 0444 (r--r--r--)
mode of "cert.pem" changed from 0644 (rw-r--r--) to 0444 (r--r--r--)

15、归集服务器证书

[root@localhost ca]# cp server-*.pem  /etc/docker/
[root@localhost ca]# cp ca.pem /etc/docker/

16、修改Docker配置，使Docker守护程序仅接受来自提供CA信任的证书的客户端的连接

[root@localhost ca]# vim /lib/systemd/system/docker.service

将
ExecStart=/usr/bin/dockerd
替换为：

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

17、重新加载daemon并重启docker

[root@localhost ~]# systemctl daemon-reload 
[root@localhost ~]# systemctl restart docker

18、开放2376端口 ( 阿里云服务器端口也要打开)

[root@localhost ca]# /sbin/iptables -I INPUT -p tcp --dport 2376 -j ACCEPT

[root@localhost ca]# iptables-save
# Generated by iptables-save v1.4.21 on Wed Oct 17 14:47:38 2018
*nat
:PREROUTING ACCEPT [225:14836]
:INPUT ACCEPT [225:14836]
:OUTPUT ACCEPT [1:76]
:POSTROUTING ACCEPT [1:76]
:DOCKER - [0:0]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE
-A DOCKER -i docker0 -j RETURN
COMMIT
# Completed on Wed Oct 17 14:47:38 2018
# Generated by iptables-save v1.4.21 on Wed Oct 17 14:47:38 2018
*filter
:INPUT ACCEPT [8:2858]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [39:30400]
:DOCKER - [0:0]
:DOCKER-ISOLATION-STAGE-1 - [0:0]
:DOCKER-ISOLATION-STAGE-2 - [0:0]
:DOCKER-USER - [0:0]
-A INPUT -p tcp -m tcp --dport 2376 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 2375 -j ACCEPT
-A FORWARD -j DOCKER-USER
-A FORWARD -j DOCKER-ISOLATION-STAGE-1
-A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -o docker0 -j DOCKER
-A FORWARD -i docker0 ! -o docker0 -j ACCEPT
-A FORWARD -i docker0 -o docker0 -j ACCEPT
-A DOCKER-ISOLATION-STAGE-1 -i docker0 ! -o docker0 -j DOCKER-ISOLATION-STAGE-2
-A DOCKER-ISOLATION-STAGE-1 -j RETURN
-A DOCKER-ISOLATION-STAGE-2 -o docker0 -j DROP
-A DOCKER-ISOLATION-STAGE-2 -j RETURN
-A DOCKER-USER -j RETURN
COMMIT
# Completed on Wed Oct 17 14:47:38 2018

19、重启docker

[root@localhost ca]# service docker restart

20、保存相关客户端的pem文件到本地

21、idea的配置

22、若出现以下错误，请查看前面的步骤是否遗漏或出错