要了解kerberos除了它的[http://web.mit.edu/kerberos/krb5-1.10/ 官网][[BR]]

找了很多久，比较好的中文说明居然在[http://docs.oracle.com/cd/E26926_01/html/E25889/intro-1.html#scrolltoc oracle-solaris上面]，大公司就是大公司

选择一套机器做KDC,测试环境选择了192.168.11.63 - hadooptest-11-63.pconline.ctc[[BR]]

Client有四台机器：
192.168.11.64 - hadooptest-11-64.pconline.ctc[[BR]]
192.168.11.65 - hadooptest-11-65.pconline.ctc[[BR]]
192.168.11.66 - hadooptest-11-66.pconline.ctc[[BR]]
192.168.11.67 - hadooptest-11-67.pconline.ctc[[BR]]

tar -zxvf krb5-1.10.3.tar.gz[[BR]]
cd krb5-1.10.3/src[[BR]]
./configure[[BR]]
make[[BR]]
make install

1. 编辑 11.63 上/etc/krb5.conf 文件[[BR]]

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

[libdefaults]
 default_realm = LOCALDOMAIN
 dns_lookup_realm = false
 dns_lookup_kdc = false
 ticket_lifetime = 24h
 forwardable = yes

[realms]
 LOCALDOMAIN = {
  kdc = hadooptest-11-63.pconline.ctc:88
  admin_server = hadooptest-11-63.pconline.ctc:749
  default_domain = localdomain 
}

[domain_realm]
 .localdomain = LOCALDOMAIN
 localdomain = LOCALDOMAIN

[appdefaults]
 pam = {
   debug = false
   ticket_lifetime = 36000
   renew_lifetime = 36000
   forwardable = true
   krb4_convert = false
 }

}}}

2.新建 /usr/local/var/krb5kdc/kdc.conf文件[[BR]]

{{{
[kdcdefaults]
 v4_mode = nopreauth
 kdc_ports = 750,88
 kdc_tcp_ports = 88
 
[realms]
 LOCALDOMAIN = {
  acl_file = /usr/local/var/krb5kdc/kadm5.acl
  dict_file = /usr/share/dict/words
  admin_keytab = /usr/local/var/krb5kdc/kadm5.keytab
  kdc_ports = 750,88
  max_life = 1d 0h 0m 0s
  max_renewable_life = 7d 0h 0m 0s
  supported_enctypes = des3-hmac-sha1:normal des-cbc-crc:normal des:normal des:v4 des:norealm des:onlyrealm
  default_principal_flags = +preauth
 }
}}}


3.新建Kerberos数据库[[BR]]

{{{
# /usr/local/sbin/kdb5_util create -r LOCALDOMAIN -s[[BR]]
}}}

4.在/usr/local/var/krb5kdc/目录下新建kadm5.acl文件，内容如下：

*/admin@LOCALDOMAIN      *


5.开始为KDC设置初始用户信息，这里需要在KDC上执行kadmin.local命令（该命令仅能在KDC上运行，如果你需要在其他机器上管理kerberos的话，直接运行kadmin）

# /usr/local/sbin/kadmin.local[[BR]]
Enter password forprincipal "admin/admin@LOCALDOMAIN":[[BR]]
kadmin.local: addprinc admin/admin@LOCALDOMAIN[[BR]]
Re-enter password forprincipal "admin/admin@LOCALDOMAIN":[[BR]]
Principal "admin/admin@LOCALDOMAIN"created.[[BR]]
生成admin keytab文件：[[BR]]

kadmin.local: ktadd -k /usr/local/var/krb5kdc/kadm5.keytab kadmin/admin kadmin/changepw[[BR]]
Entry forprincipal kadmin/admin with kvno 3, encryption type DES-CBC-CRC added to keytab WRFILE:/usr/local/var/krb5kdc/kadm5.keytab.[[BR]]
Entry forprincipal kadmin/changepw with kvno 3, encryption type DES-CBC-CRC added to keytab WRFILE:/usr/local/var/krb5kdc/kadm5.keytab.[[BR]]


 6.启动KDC和kadmind[[BR]]

# /usr/local/sbin/krb5kdc[[BR]]
# /usr/local/sbin/kadmind[[BR]]

7.为了使集群内所有机器都有Kerberos工具，你需要在集群中每个机器上安装Kerberos程序。并给出/etc/krb5.conf配置文件，并不需要做其他配置。

8.首先在KDC上为Kerberos添加一个新的管理员hadoop/admin：[[BR]]

# /usr/local/sbin/kadmin.local[[BR]]
Enter password forprincipal "hadoop/admin@LOCALDOMAIN":[[BR]]
kadmin.local: addprinc hadoop/admin@LOCALDOMAIN[[BR]]
Re-enter password forprincipal "hadoop/admin@LOCALDOMAIN":[[BR]]
Principal "hadoop/admin@LOCALDOMAIN"created.[[BR]]


9.在各机器上增加hadoop用户

/usr/local/bin/kadmin[[BR]]

addprinc -randkey host/hadooptest-11-64.pconline.ctc@LOCALDOMAIN[[BR]]
addprinc -randkey hadoop/hadooptest-11-64.pconline.ctc@LOCALDOMAIN[[BR]]

''这里遇到一个问题，我们的hadoop  core-site.xml使用的短名 hadooptest-11-64,要改为长名 hadooptest-11-64.pconline.ctc，不然kerberos里面会认为不同的实体[[BR]]''


ktadd -k /data/hadoop-1.0.3/conf/hadoop.keytab hadoop/hadooptest-11-64.pconline.ctc@LOCALDOMAIN host/hadooptest-11-64.pconline.ctc@LOCALDOMAIN 

----
查看keytab文件内容，这个不用执行[[BR]]
/usr/local/bin/klist  -e -k -t hadoop.keytab

10. 修改配置文件，这些是固定的，网上很多地方有说, _HOST类似宏定义，有些地方读配置，有些地方读本机的长名[[BR]]



{{{
配置 core-site.xml

<property>
  <name>hadoop.security.authorization</name>
  <value>true</value>
  <description>Is service-level authorization enabled?</description>
</property>

<property>
  <name>hadoop.security.authentication</name>
  <value>kerberos</value>
  <description>Possible values are simple (no authentication), and kerberos
  </description>
</property>

配置 hdfs-site.xml

<!--    kerberos -nameNode -config       -->

<property>
  <name>dfs.https.address</name>
  <value>hadooptest-11-63.pconline.ctc:50470</value>
</property>

<property>
  <name>dfs.https.port</name>
  <value>50470</value>
</property>

<property>
  <name>dfs.block.access.token.enable</name>
  <value>true</value>
</property>

<property>
  <name>dfs.namenode.keytab.file</name>
  <value>/data/hadoop-1.0.3/conf/hadoop.keytab</value>
</property>

<property>
  <name>dfs.namenode.kerberos.principal</name>
  <value>hadoop/_HOST@LOCALDOMAIN</value>
</property>

<property>
  <name>dfs.namenode.kerberos.https.principal</name>
  <value>host/_HOST@LOCALDOMAIN</value>
</property>



<!--    kerberos  secondNameNode config      -->
<property>
  <name>dfs.secondary.http.address</name>
  <value>hadooptest-11-64.pconline.ctc:50090</value>
</property>
<property>
  <name>dfs.secondary.https.address</name>
  <value>0.0.0.0:50495</value>
</property>
<property>
  <name>dfs.secondary.https.port</name>
  <value>50495</value>
</property>
<property>
  <name>dfs.secondary.namenode.keytab.file</name>
  <value>/data/hadoop-1.0.3/conf/hadoop.keytab</value> 
</property>
<property>
  <name>dfs.secondary.namenode.kerberos.principal</name>
  <value>hadoop/_HOST@LOCALDOMAIN</value>
</property>
<property>
  <name>dfs.secondary.namenode.kerberos.https.principal</name>
  <value>host/_HOST@LOCALDOMAIN</value>
</property>


<!--    kerberos DataNode config    -->


<property>
  <name>dfs.datanode.data.dir.perm</name>
  <value>700</value>
  <description>Permissions for the directories on on the local filesystem where 
  the DFS data node store its blocks. The permissions can either be octal or 
  symbolic.</description>
</property>
<property>
  <name>dfs.datanode.address</name>
  <value>0.0.0.0:1004</value>
</property>
<property>
  <name>dfs.datanode.http.address</name>
  <value>0.0.0.0:1006</value>
</property>
<property>
  <name>dfs.datanode.keytab.file</name>
  <value>/data/hadoop-1.0.3/conf/hadoop.keytab</value> 
</property>
<property>
  <name>dfs.datanode.kerberos.principal</name>
  <value>hadoop/_HOST@LOCALDOMAIN</value>
</property>
<property>
  <name>dfs.datanode.kerberos.https.principal</name>
  <value>host/_HOST@LOCALDOMAIN</value>
</property>
}}}

11. 启动dfs， 

/data/hadoop-1.0.3/bin/hadoop-daemon.sh start namenode

/data/hadoop-1.0.3/bin/hadoop-daemons.sh --config /data/hadoop-1.0.3/conf/ --hosts masters start secondarynamenode

hadoop-env.sh 新增一行
export HADOOP_SECURE_DN_USER=hadoop 指定以hadoop身份启动datanode

启动datanode遇到一个bug[[BR]]
https://issues.apache.org/jira/browse/HDFS-3402
要修改bin/hadoop文件，使用sudo 来启动datanode, datanode 启动完有两个进程，一个是root的SecureDataNodeStarter，一个是hadoop的SecureDataNodeStarter


12.修改mapred-site.xml 文件


{{{
<!-- kerberos config -->
<!-- JobTracker security configs -->
<property>
  <name>mapreduce.jobtracker.kerberos.principal</name>
  <value>hadoop/_HOST@LOCALDOMAIN</value>
</property>
<property>
  <name>mapreduce.jobtracker.kerberos.https.principal</name>
  <value>host/_HOST@LOCALDOMAIN</value>
</property>
<property>
  <name>mapreduce.jobtracker.keytab.file</name>
  <value>/data/hadoop-1.0.3/conf/hadoop.keytab</value> 
</property>
 
<!-- TaskTracker security configs -->
<property>
  <name>mapreduce.tasktracker.kerberos.principal</name>
  <value>hadoop/_HOST@LOCALDOMAIN</value>
</property>
<property>
  <name>mapreduce.tasktracker.kerberos.https.principal</name>
  <value>host/_HOST@LOCALDOMAIN</value>
</property>
<property>
  <name>mapreduce.tasktracker.keytab.file</name>
  <value>/data/hadoop-1.0.3/conf/hadoop.keytab</value> <!-- path to the MapReduce keytab -->
</property>
 
<!-- TaskController settings -->
<property>
  <name>mapred.task.tracker.task-controller</name>
  <value>org.apache.hadoop.mapred.DefaultTaskController</value>
</property>
<property>
  <name>mapreduce.tasktracker.group</name>
  <value>hadoop</value>
</property>
}}}


13.启动mapred

可能要修改 taskcontroller.cfg

start-mapred.sh 



----
14.配置hbase

{{{
    <property>
        <name>hbase.regionserver.kerberos.principal</name>
        <value>hadoop/_HOST@LOCALDOMAIN</value>
      </property>
      <property>
        <name>hbase.regionserver.keytab.file</name>
        <value>/data/hadoop-1.0.3/conf/hadoop.keytab</value>
      </property>
      <property>
        <name>hbase.master.kerberos.principal</name>
        <value>hadoop/_HOST@LOCALDOMAIN</value>
      </property>
      <property>
        <name>hbase.master.keytab.file</name>
        <value>/data/hadoop-1.0.3/conf/hadoop.keytab</value>
      </property>


      <property>
        <name>hbase.security.authentication</name>
        <value>kerberos</value> 
      </property> 
      <property>
        <name>hbase.security.authorization</name>
        <value>true</value>
      </property>
      <property>
      <name>hbase.coprocessor.region.classes</name>
        <value>org.apache.hadoop.hbase.security.token.TokenProvider</value>
      </property>
   <property>
        <name>hbase.coprocessor.master.classes</name>
        <value>org.apache.hadoop.hbase.security.access.AccessController</value>
      </property>
      <property>
      <name>hbase.coprocessor.region.classes</name>
        <value>org.apache.hadoop.hbase.security.token.TokenProvider,
        org.apache.hadoop.hbase.security.access.AccessController</value>
      </property>
    
}}}


不过，装到最后还是悲剧了，因为我们的kerberos版本太高

[https://ccp.cloudera.com/display/CDHDOC/Appendix+A+-+Troubleshooting  参考 cloudera网站] 里面机关重重，各种版本一不小心就悲剧了