update

Kerberize.md

@@ -1 +1,48 @@
+# <center> Introductions & Overview </center>
+If you want to know more about Kerberos. Check out this [**link**](https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Managing_Smart_Cards/Using_Kerberos.html)<br>
+* <a href="#intro_1"/> Pre-requisite
+* <a href="#intro_2"/> KDC Installation and Configuration
+* <a href="#intro_3"/> Configure MySQL with a replica server
+* <a href="#intro_4"/> Installing the MySQL JDBC Driver
+
+
+## <center> <a name="intro_1"/> Pre-requisite
+* You have a Hadoop Cluster managed by Cloudera Manager. If you dont have one, check this [**link**](https://github.com/rainy/cloudera-install-guide/blob/master/Cloudera%20Installation.md) to create a cluster managed by cloudera manager
+* You have the DNS server configured, and each host in the cluster is accessible via DNS<p>
+
+
+## <center> <a name="intro_2"/> KDC Installation and Configuration
+**Step 1:** To install packages for a Kerberos server <br>
+```bash
+# yum install -y krb5-server krb5-libs krb5-auth-dialog krb5-workstation
+```
+
+**Step 2:** Modify the /etc/krb5.conf configuration <br>
+```bash
+# vim /etc/krb5.conf
+[logging]
+ default = FILE:/var/log/krb5libs.log
+ kdc = FILE:/var/log/krb5kdc.log
+ admin_server = FILE:/var/log/kadmind.log
+
+[libdefaults]
+ default_realm = SEBC.SIN
+ dns_lookup_realm = false
+ dns_lookup_kdc = false
+ ticket_lifetime = 24h
+ renew_lifetime = 7d
+ forwardable = true
+
+[realms]
+ SEBC.SIN = {
+  kdc = ip-172-31-250-81.cn-north-1.compute.internal
+  admin_server = ip-172-31-250-81.cn-north-1.compute.internal
+ }
+
+[domain_realm]
+ .cn-north-1.compute.internal = SEBC.SIN
+ cn-north-1.compute.internal = SEBC.SIN
+```
+
+