Ambari2.6.2集成Kerberos

名詞解釋

Kerberos: Network Authentication protocol（網絡認證協議）
KDC: Key Distribution center（密鑰分配中心）
Kadmin: Kerberos Administrator（Kerberos管理）

前言

安裝Kerberos之前，需要有配置好的Ambari環境。
Ambari安裝參見上一篇文章：http://blog.51cto.com/784687488/2329891

配置/etc/hosts

[root@ambari-agent01 ~]$ cat /etc/hosts
10.0.2.20    ambari-server    server.ambari.com
10.0.2.21    ambari-agent01   agent01.ambari.com    kerberos-auth
10.0.2.22    ambari-agent02   agent02.ambari.com

安裝Kerberos

# 下載 aes256-cts 編碼支持組件 JCE（UnlimitedJCEPolicyJDK7.zip）
yum install krb5-server krb5-libs krb5-workstation -y

配置Kerberos Server配置文件

[root@ambari-agent01 ~]$ cat >/etc/krb5.conf<<EOF
# Configuration snippets may be placed in this directory as well
includedir /etc/krb5.conf.d/

[logging]
 default = FILE:/var/log/krb5libs.log
 kdc = FILE:/var/log/krb5kdc.log
 admin_server = FILE:/var/log/kadmind.log

[libdefaults]
 dns_lookup_realm = false
 dns_lookup_kdc = false
 ticket_lifetime = 24h     # 認證憑證生命週期
 renew_lifetime = 7d      # 認證憑證最長延期時限
 forwardable = true
 rdns = false
 pkinit_anchors = /etc/pki/tls/certs/ca-bundle.crt
 default_realm = TEST.COM
 default_ccache_name = KEYRING:persistent:%{uid}

[realms]
TEST.COM = {
  kdc = kerberos-auth                 # TEST.COM 域中的 KDC 接口
  admin_server = kerberos-auth  # TEEEST.COM 域中的 Admin Server 接口
}

[domain_realm]
.TEST.com = TEST.COM
TEST.com = TEST.COM
EOF

配置KDC配置文件

# 解壓 JCE 支持組件至${JRE_HOME}/lib/security/
[root@ambari-agent01 ~]$ unzip UnlimitedJCEPolicyJDK7.zip
[root@ambari-agent01 ~]$ for n in 20 21 22;do scp local_policy.jar US_export_policy.jar 10.0.2.$n:/opt/jdk/jre/lib/security/;done
[root@ambari-agent01 ~]$ cat >/var/kerberos/krb5kdc/kdc.conf<<EOF
[kdcdefaults]
  kdc_ports = 88
  kdc_tcp_ports = 88

[realms]
 TEST.COM = {
    acl_file = /var/kerberos/krb5kdc/kadm5.acl
    dict_file = /usr/share/dict/words
    admin_keytab = /var/kerberos/krb5kdc/kadm5.keytab
    # aes256-cts這個校驗方式需要單獨下載 JCE-*.jar，並把 jar 包放到 ${JRE_HOME}/lib/security 路徑下
    master_key_type = aes256-cts
    supported_enctypes = aes256-cts:normal 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
 }
EOF

管理帳號 ACL 配置

[root@ambari-agent01 ~]$ cat >/var/kerberos/krb5kdc/kadm5.acl<<EOF
*/[email protected]        *
EOF

初始化並創建 Kerberos 數據庫

[root@ambari-agent01 ~]$ kdb5_util create -r TEST.COM -s
Loading random data
Initializing database '/var/kerberos/krb5kdc/principal' for realm 'TEST.COM',
master key name 'K/[email protected]'
You will be prompted for the database Master Password.
It is important that you NOT FORGET this password.
Enter KDC database master key:                                  # 設置密碼
Re-enter KDC database master key to verify:               # 確認密碼

創建管理帳號 Principal

[root@ambari-agent01 krb5kdc]$ kadmin.local -q "addprinc admin/admin"
Authenticating as principal root/[email protected] with password.
WARNING: no policy specified for admin/[email protected]; defaulting to no policy
Enter password for principal "admin/[email protected]":          # 設置管理帳號密碼
Re-enter password for principal "admin/[email protected]":    # 確認密碼
Principal "admin/[email protected]" created.

查看 Kerberos 數據庫帳號列表

# 個人感覺與 Mysql 查詢用戶SQL“select user, host from mysql.user;” 差不多
[root@ambari-agent01 krb5kdc]$ kadmin.local listprincs
K/[email protected]
admin/[email protected]
kadmin/[email protected]
kadmin/[email protected]
kadmin/[email protected]
kiprop/[email protected]
krbtgt/[email protected]

啓動 Kerberos-Server

systemctl start krb5kdc.service

啓動 Kadmin-Server

systemctl start kadmin.service

配置Ambari集成Kerberos，Ambari頁面配置

在管理項目中選中Kerberos

開啓Kerberos

這個警告不用管，選擇'Proceed Anyway'

# 警告：yarn的日誌和日誌目錄將被刪除，並將resourcemanager的狀態重新格式化爲開啓或關閉kerberos應用的狀態

開始配置Kerberos

配置並測試KDC連通性

配置測試kadmin連通性並繼續

# 在 Admin Principal 和 Admin Password 中填入手動創建的管理帳號與帳號密碼
# 創建的帳號爲 admin/[email protected]，密碼爲123456

在Ambari集羣所有節點安裝Kerberos Client，並進行Client連接測試

# 測試過程可能會提示session過期，重新輸入用戶、密碼進行認證
# 客戶端連接命令： kadmin -r TEST.COM -s kerberos-auth:88 -padmin/[email protected]

安裝客戶端及測試連接成功

# 後面幾項配置使用默認就可以了。
# 如果有興趣的話，在 Confirm Configuration (確認配置）這步時可以下載CSV文件看一下，裏面有詳細的 Ambari 自動創建的各個應用組件連接 Kerberos 認證的 principal 和 keytabs