三、搭建數據庫（在主機ambari-mysql上部署）

Ambari安裝會將安裝等信息寫入數據庫，建議使用自己安裝的Mysql數據庫，也可以不安裝而使用默認數據庫PostgreSQL

版本要求：
- PostgreSQL 8
- PostgreSQL 9.1.13+,9.3, 9.4***
- MariaDB 10*
- MySQL 5.6
- Oracle 11gr2
- Oracle 12c**

按你系統來選擇源：http://downloads.mariadb.org/mariadb/repositories/

Here is your custom MariaDB YUM repository entry for CentOS. Copy and paste it into a file under /etc/yum.repos.d/ (we suggest naming the file MariaDB.repo or something similar).

# MariaDB 10.1 CentOS repository list - created 2016-12-09 06:03 UTC
# http://downloads.mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.1/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
After the file is in place, install MariaDB with:

$ sudo yum install MariaDB-server MariaDB-client
If you haven't already accepted the MariaDB GPG key, you will be prompted to do so. See "Installing MariaDB with yum" for detailed information.

安裝完成后創建ambari數據庫及用戶，登錄root用戶執行下面語句：
create database ambari character set utf8 ; ?
CREATE USER 'ambari'@'%'IDENTIFIED BY 'Ambari-123';
GRANT ALL PRIVILEGES ON *.* TO 'ambari'@'%';
FLUSH PRIVILEGES;

如果要安裝Hive，再創建Hive數據庫和用戶 再執行下面的語句：
create database hive character set utf8 ; ?
CREATE USER 'hive'@'%'IDENTIFIED BY 'Hive-123';
GRANT ALL PRIVILEGES ON *.* TO 'hive'@'%';
FLUSH PRIVILEGES;

如果要安裝Oozie，再創建Oozie數據庫和用戶 再執行下面的語句：
create database oozie character set utf8 ; ?
CREATE USER 'oozie'@'%'IDENTIFIED BY 'Oozie-123';
GRANT ALL PRIVILEGES ON *.* TO 'oozie'@'%';
FLUSH PRIVILEGES;

四、制作本地源 (在SY-001.hadoop部署)

下載 Ambari HDP HDP-UTILS 源包（文件很大，需要很長下載時間，請耐心等待。。。）
$ cd /usr/local/src/Ambari/
$ wget http://public-repo-1.hortonworks.com/ambari/centos7/2.x/updates/2.4.2.0/ambari-2.4.2.0-centos7.tar.gz
$ wget http://public-repo-1.hortonworks.com/HDP/centos7/2.x/updates/2.5.3.0/HDP-2.5.3.0-centos7-rpm.tar.gz
$ wget http://public-repo-1.hortonworks.com/HDP-UTILS-1.1.0.21/repos/centos7/HDP-UTILS-1.1.0.21-centos7.tar.gz

安裝本地源制作相關工具
$ yum install yum-utils createrepo -y

安裝httpd服務
$ yum install httpd -y
$ systemctl enable httpd && systemctl start httpd
$ cd /var/www/html/ && mkdir ambari
$ cd /usr/local/src/Ambari/
$ tar xf ambari-2.4.2.0-centos7.tar.gz -C /var/www/html/ambari/
$ tar xf HDP-2.5.3.0-centos7-rpm.tar.gz -C /var/www/html/ambari/
$ tar xf HDP-UTILS-1.1.0.21-centos7.tar.gz -C /var/www/html/ambari/

驗證httd網站是否可用，可以使用links 命令或者瀏覽器直接訪問下面的地址：
$ links http://172.19.80.2/ambari/
結果是看到剛才解壓的目錄

配置ambari、HDP、HDP-UTILS的本地源
首先下載上面資源列表中的相應repo文件，修改其中的URL為本地的地址，相關配置如下：
$ cd /etc/yum.repos.d/
$ cat ambari.repo
#VERSION_NUMBER=2.4.2.0-136
[Updates-ambari-2.4.2.0]
name=ambari-2.4.2.0 - Updates
baseurl=http://172.19.80.2/ambari/AMBARI-2.4.2.0/centos7/2.4.2.0-136
gpgcheck=1
gpgkey=http://172.19.80.2/ambari/AMBARI-2.4.2.0/centos7/2.4.2.0-136/RPM-GPG-KEY/RPM-GPG-KEY-Jenkins
enabled=1
priority=1

$ cat hdp.repo
#VERSION_NUMBER=2.5.3.0
[HDP-2.5.3.0]
name=HDP Version - HDP-2.5.3.0
baseurl=http://172.19.80.2/ambari/HDP/centos7/2.x/updates/2.5.3.0
gpgcheck=1
gpgkey=http://172.19.80.2/ambari/HDP/centos7/2.x/updates/2.5.3.0/RPM-GPG-KEY/RPM-GPG-KEY-Jenkins
enabled=1
priority=1

[HDP-UTILS-1.1.0.21]
name=HDP Utils Version - HDP-UTILS-1.1.0.21
baseurl=http://172.19.80.2/ambari/HDP-UTILS-1.1.0.21/repos/centos7
gpgcheck=1
gpgkey=http://172.19.80.2/ambari/HDP/centos7/2.x/updates/2.5.0.0/RPM-GPG-KEY/RPM-GPG-KEY-Jenkins
enabled=1
priority=1

$ yum clean all
$ yum makecache
$ yum repolist

五、安裝Ambari (在SY-001.hadoop部署)

安裝Ambari
$ yum install ambari-server -y

配置Ambari
$ ambari-server setup

下面是配置執行流程，按照提示操作
（1） 提示是否自定義設置。輸入：y
Customize user account for ambari-server daemon [y/n] (n)? y

（2）ambari-server 賬號。輸入：ambari
Enter user account for ambari-server daemon (root):ambari
Adjusting ambari-server permissions and ownership...

（3）設置JDK。輸入：3
Checking JDK...
Do you want to change Oracle JDK [y/n] (n)? y
[] Oracle JDK 1.8 + Java Cryptography Extension (JCE) Policy Files 8
[] Oracle JDK 1.7 + Java Cryptography Extension (JCE) Policy Files 7
[] Custom JDK
==============================================================================
Enter choice (1): 3

（4）如果上面選擇3自定義JDK,則需要設置JAVA_HOME。輸入：/opt/java/jdk1.8.0_112
WARNING: JDK must be installed on all hosts and JAVA_HOME must be valid on all hosts.
WARNING: JCE Policy files are required for configuring Kerberos security. If you plan to use Kerberos,please make sure JCE Unlimited Strength Jurisdiction Policy Files are valid on all hosts.
Path to JAVA_HOME: /opt/java/jdk1.8.0_112
Validating JDK on Ambari Server...done.
Completing setup...

（5）數據庫配置。選擇：y
Configuring database...
Enter advanced database configuration [y/n] (n)? y

（6）選擇數據庫類型。輸入：3
Configuring database...
==============================================================================
Choose one of the following options:
[1] - PostgreSQL (Embedded)
[2] - Oracle
[3] - MySQL
[4] - PostgreSQL
[5] - Microsoft SQL Server (Tech Preview)
[6] - SQL Anywhere
==============================================================================
Enter choice (3): 3

（7）設置數據庫的具體配置信息，根據實際情況輸入，如果和括號內相同，則可以直接回車。
Hostname (localhost):
Port ():
Database name (ambari):
Username (ambari):
Enter Database Password (Ambari-123):

（8）將Ambari數據庫腳本導入到數據庫
如果使用自己定義的數據庫，必須在啟動Ambari服務之前導入Ambari的sql腳本

用Ambari用戶（上面設置的用戶）登錄mysql
mysql -u ambari -p
use ambari
source /var/lib/ambari-server/resources/Ambari-DDL-MySQL-CREATE.sql

（9）啟動Amabri
$ ambari-server start

（10）成功啟動后在瀏覽器輸入Ambari地址：

?