Kerberos 高可用配置
Kerberos 安装(主节点操作)
节点信息
data80
data81
data82
data83
- 备注
- 主Kerberos节点：data80
- 备Kerberos节点：data81
安装 kdc server
-
在KDC(name01)上安装包 krb5、krb5-server 和 krb5-client
yum install krb5-server krb5-libs krb5-auth-dialog krb5-workstation -y -
安装 krb5-devel、krb5-workstation
yum install krb5-devel krb5-workstation -y
修改 krb5.conf
/etc/krb5.conf
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
ticket_lifetime = 24h
renew_lifetime = 7d
forwardable = true
rdns = false
pkinit_anchors = /etc/pki/tls/certs/ca-bundle.crt
default_realm = HADOOP.COM
default_ccache_name = KEYRING:persistent:%{uid}
[realms]
HADOOP.COM = {
kdc = data80
admin_server = data80
kdc = data81
admin_server = data81
}
同步配置文件
sudo scp /etc/krb5.conf data81:/etc/
sudo scp /etc/krb5.conf data82:/etc/
sudo scp /etc/krb5.conf data83:/etc/
创建数据库(在data80节点)
kdb5_util create -r HADOOP.COM -s
启动服务(在data80节点)
chkconfig --level 35 krb5kdc on
chkconfig --level 35 kadmin on
service krb5kdc start
service kadmin start
创建主从同步账号，并为账号生成keytab文件
sudo kadmin.local
kadmin.local: addprinc -randkey host/[email protected]
kadmin.local: addprinc -randkey host/[email protected]
kadmin.local: ktadd host/[email protected]
kadmin.local: ktadd host/[email protected]
使用随机生成秘钥的方式创建同步账号，并使用ktadd命令生成同步账号的keytab文件，默认文件生成在/etc/krb5.keytab下
复制以下文件到备Kerberos服务器相应目录
-
将/etc目录下的krb5.conf和krb5.keytab文件拷贝至备Kerberos服务器的/etc目录下
-
将/var/kerberos/krb5kdc目录下的.k5.HADOOP.COM、kadm5.acl和krb5.conf文件拷贝至备Kerberos服务器的/var/kerberos/krb5kdc目录
注意： .k5.HADOOP.COM 为隐藏文件，一定不要忘记拷贝
备Kerberos节点操作
需要申明用来同步的用户
在/var/kerberos/krb5kdc/kpropd.acl配置文件中添加对应账户，如果配置文件不存在则新增
cd /var/kerberos/krb5kdc
sudo vim kpropd.acl
host/[email protected]
host/[email protected]
启动kprop服务并加入系统自启动
sudo systemctl enable kprop
sudo systemctl start kprop
sudo systemctl status kprop
主节点数据同步至备节点
sudo kdb5_util dump /var/kerberos/krb5kdc/master.dump
导出成功后生成master.dump和master.dump.dump_ok两个文件。
在主节点上使用kprop命令将master.dump文件同步至备节点
sudo kprop -f /var/kerberos/krb5kdc/master.dump -d -P 754 data81
-
日志
3769 bytes sent. Database propagation to data81: SUCCEEDED
在备节点的/var/kerberos/krb5kdc目录下查看
-rw-------. 1 root root 3769 Apr 8 01:25 from_master
-rw-------. 1 root root 22 Apr 8 00:22 kadm5.acl
-rw-------. 1 root root 451 Sep 14 2019 kdc.conf
-rw-r--r--. 1 root root 46 Apr 8 00:27 kpropd.acl
-rw-------. 1 root root 8192 Apr 8 01:25 principal
-rw-------. 1 root root 8192 Apr 8 01:25 principal.kadm5
-rw-------. 1 root root 0 Apr 8 00:29 principal.kadm5.lock
-rw-------. 1 root root 0 Apr 8 01:25 principal.ok
在备节点的/var/kerberos/krb5kdc目录下增加了如下文件：
- from_master
- principal
- principal.kadm5
- principal.kadm5.lock
- principal.ok
在备节点上测试通过过来的数据是否能启动Kerberos服务
-
首先将kprop服务停止，将kpropd.acl文件备份并删除，然后启动krb5kdc和kadmin服务
sudo systemctl stop kprop sudo mv /var/kerberos/krb5kdc/kpropd.acl/var/kerberos/krb5kdc/kpropd.acl.bak sudo systemctl start krb5kdc sudo systemctl start kadmin -
修改备服务器的/etc/krb5.conf文件，将kdc和kadmin_server修改为备ls -l服务器地址，测试kinit是否正常
HADOOP.COM = { # kdc = data80 # admin_server = data80 kdc = data81 admin_server = data81 }
设置定时
crontab -e
*/5 * * * * root/var/kerberos/krb5kdc/kprop_sync.sh >/var/kerberos/krb5kdc/lastupdate
常见问题
-
list 无权限
kadmin: list_principals get_principals: Operation requires ``list'' privilege while retrieving list.