安装Kerberos服务端和客户端

待我称王封你为后i 2023-10-04 15:43 28阅读 0赞

## 简介 ##

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## Kerberos认证流程 ##

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## 环境准备 ##

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![在这里插入图片描述][20210607150311907.png]  
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![在这里插入图片描述][20210607154014150.png]  
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## 安装Kerberos服务端 ##

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![在这里插入图片描述][2021060716142895.png]

![在这里插入图片描述][20210607160419611.png]

### yum安装 ###

yum install krb5-server krb5-libs krb5-workstation -y

### vim /etc/krb5.conf ###

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[logging]
     default = FILE:/var/log/krb5libs.log
     kdc = FILE:/var/log/krb5kdc.log
     admin_server = FILE:/var/log/kadmind.log
    
    [libdefaults]
     default_realm = HADOOP.COM
     dns_lookup_realm = false
     dns_lookup_kdc = false
     ticket_lifetime = 24h
     renew_lifetime = 7d
     forwardable = true
     clockskew = 120
     udp_preference_limit = 1
     
    [realms]
     HADOOP.COM = {
        
      kdc = node1
      admin_server = node1
     }
    
    [domain_realm]
     .hadoop.com = HADOOP.COM
     hadoop.com = HADOOP.COM
     node1 = HADOOP.COM
     node2 = HADOOP.COM
     node3 = HADOOP.COM
     node4 = HADOOP.COM
     node5 = HADOOP.COM

> 说明：  
> \[logging\]：表示server端的日志的打印位置  
> udp\_preference\_limit = 1 禁止使用udp可以防止一个Hadoop中的错误  
> ticket\_lifetime： 表明凭证生效的时限，一般为24小时。  
> renew\_lifetime： 表明凭证最长可以被延期的时限，一般为一个礼拜。当凭证过期之后，对安全认证的服务的后续访问则会失败。  
> clockskew：时钟偏差是不完全符合主机系统时钟的票据时戳的容差，超过此容差将不接受此票据，单位是秒

### vim /var/kerberos/krb5kdc/kdc.conf ###

[kdcdefaults]
     kdc_ports = 88
     kdc_tcp_ports = 88
    
    [realms]
     HADOOP.COM = {
        
      #master_key_type = aes256-cts
      acl_file = /var/kerberos/krb5kdc/kadm5.acl
      dict_file = /usr/share/dict/words
      admin_keytab = /var/kerberos/krb5kdc/kadm5.keytab
      max_renewable_life = 7d
      supported_enctypes = aes128-cts:normal des3-hmac-sha1:normal arcfour-hmac:normal camellia256-cts:normal camellia128-cts:normal des-hmac-sha1:normal des-cbc-md5:normal des-cbc-crc:normal
     }

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### vim /var/kerberos/krb5kdc/kadm5.acl ###

![在这里插入图片描述][20210607160009443.png]

#修改如下
    */admin@HADOOP.COM  *
    #kadm5.acl 文件更多内容可参考：kadm5.acl

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只要名称满足上述规则就可以拥有最高权限。

### 初始化kerberos database ###

![在这里插入图片描述][2021060716065037.png]

cd /var/kerberos/krb5kdc/
    kdb5_util create -s -r HADOOP.COM
    # hust@4400

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图示有误，是会创建4个文件。

## 创建账户 ##

kadmin.local
    addprinc root/admin@HADOOP.COM
    listprincs

![在这里插入图片描述][20210607161033124.png]  
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## 设置开机自启 ##

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[root@node1 krb5kdc]# systemctl restart krb5kdc.service
    [root@node1 krb5kdc]# systemctl restart kadmin
    [root@node1 krb5kdc]# systemctl enable krb5kdc.service
    Created symlink from /etc/systemd/system/multi-user.target.wants/krb5kdc.service to /usr/lib/systemd/system/krb5kdc.service.
    [root@node1 krb5kdc]# systemctl enable kadmin.service
    Created symlink from /etc/systemd/system/multi-user.target.wants/kadmin.service to /usr/lib/systemd/system/kadmin.service.
    [root@node1 krb5kdc]#

## 安装Kerberos客户端 ##

> 每一个node节点都需要安装客户端及其配置。

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### yum安装 ###

![在这里插入图片描述][20210607162707182.png]

yum install krb5-libs krb5-workstation -y

### vim /etc/krb5.conf ###

![在这里插入图片描述][20210607162951263.png]

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或者直接将server节点的该配置文件拷贝到各个节点即可：

[root@node1 krb5kdc]# scp /etc/krb5.conf node2:/etc/krb5.conf
    krb5.conf                                                                                                          100%  557   544.7KB/s   00:00
    [root@node1 krb5kdc]# scp /etc/krb5.conf node3:/etc/krb5.conf
    krb5.conf                                                                                                          100%  557   561.7KB/s   00:00
    [root@node1 krb5kdc]# scp /etc/krb5.conf node4:/etc/krb5.conf
    krb5.conf                                                                                                          100%  557   490.3KB/s   00:00
    [root@node1 krb5kdc]# scp /etc/krb5.conf node5:/etc/krb5.conf
    krb5.conf                                                                                                          100%  557   472.8KB/s   00:00
    [root@node1 krb5kdc]#

### 客户端登录服务端 ###

![在这里插入图片描述][2021060716395345.png]

kinit root/admin@HADOOP.COM
    #输入密码后没任何输出表示正确
    klist
    #登录 输入密码后进入
    kadmin
    listprincs

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## 规划Hadoop中各个服务分配kerberos的principal ##

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nm和nodemanager可自定义，易于识别即可  
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## 配置HDFS ##

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### 配置HDFS相关的kerberos账户 ###

![在这里插入图片描述][20210607170246370.png]  
keytab文件就相当于kerberos账户的钥匙，有了它就可以免密使用该账户。

mkdir /etc/security/keytabs
    cd /etc/security/keytabs
    kadmin

node1上的服务：  
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建一个就行了，其他的多余！！  
`addprinc -rankey hdfs/node1@HADOOP.COM`

kadmin
    addprinc -rankey nn/node1@HADOOP.COM
    addprinc -rankey rm/node1@HADOOP.COM
    addprinc -rankey HTTP/node1@HADOOP.COM

![在这里插入图片描述][20210607170958345.png]

ktadd -k /etc/security/keytabs/nn.service.keytab nn/node1@HADOOP.COM

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ktadd -k /etc/security/keytabs/rm.service.keytab rm/node1@HADOOP.COM

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ktadd -k /etc/security/keytabs/spnego.service.keytab HTTP/node1@HADOOP.COM

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ll /etc/security/keytabs

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cd /etc/security/keytabs
    chmod 400 *

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## 编译及拷贝程序 ##

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## core-site.xml ##

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## hdfs-site.xml ##

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## 自己配置 ##

kerberos server上执行`kadmin.local`：

kadmin.local:  addprinc hdfs/node1@HADOOP.COM
    kadmin.local:  addprinc hdfs/node2@HADOOP.COM
    kadmin.local:  addprinc hdfs/node3@HADOOP.COM
    kadmin.local:  addprinc hdfs/node4@HADOOP.COM
    kadmin.local:  addprinc hdfs/node5@HADOOP.COM
    kadmin.local:  addprinc http/node1@HADOOP.COM
    kadmin.local:  addprinc http/node2@HADOOP.COM
    kadmin.local:  addprinc http/node3@HADOOP.COM
    kadmin.local:  addprinc http/node4@HADOOP.COM
    kadmin.local:  addprinc http/node5@HADOOP.COM
    
     
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/hdfs.keytab hdfs/node1@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/hdfs.keytab hdfs/node2@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/hdfs.keytab hdfs/node3@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/hdfs.keytab hdfs/node4@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/hdfs.keytab hdfs/node5@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/http.keytab http/node1@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/http.keytab http/node2@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/http.keytab http/node3@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/http.keytab http/node4@HADOOP.COM
    kadmin.local:  ktadd -norandkey -k /etc/security/keytabs/http.keytab http/node5@HADOOP.COM

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