ambari之hadoop的安装
前期环境准备：
三台机器：192.168.1.25（1-3）；251-ambari_master；252-ambari_slare1；253-ambari_slare2
机器配置，系统环境
使用虚拟机，系统rhel6.6 ; centos6.5
所有机器都需要执行一下设置（我已经设置好了，可以看一下）：
1.打开最大文件数设置
[root@ambari_slare2 ~]# ulimit -Hn
10000
[root@ambari_slare2 ~]# ulimit -Sn
10000
补充：【
1. 修改/etc/security/limits.conf
通过 vi /etc/security/limits.conf修改其内容，在文件最后加入（数值也可以自己定义）：
* soft nofile = 32768
* hard nofile = 65536
2. 修改/etc/profile
通过vi /etc/profile修改，在最后加入以下内容
ulimit -n 32768
然后重新登录即可生效了。
说明：
其实只修改/etc/profile就可以生效了，但我还是建议把/etc/security/limits.conf也修改一下。
最后强调的是，你如果要使得修改对所有用户都生效，那么现在看来你只能重新编译Linux的内核才行。】
2. 修改hosts文件
[root@ambari_slare2 ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.251 ambari_master
192.168.1.252 ambari_slare1
192.168.1.253 ambari_slare2
3. 设置selinux为disabled
[root@ambari_slare2 ~]# getenforce
Disabled
4. 关闭防火墙
[root@ambari_slare2 ~]# /etc/init.d/iptables status
iptables: Firewall is not running.
5. 开启ntpd
[root@ambari_slare2 ~]# /etc/init.d/ntpd status
ntpd (pid 5858) is running...
6. 设置环境变量jdk
[root@ambari_slare2 ~]# java -version
java version "1.7.0_79"
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)
7. 配置ssh
[root@ambari_slare2 ~]# cat .ssh/authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAnxCVyAwzM743vB6KB4EVLDZ0+ydsmEtuMHD0ATar8zWqPDuBvGc4un5Fv1mIBCgOt3+GyWbDznACNlDzLkwRkxU8XhhTsRFHaWb9t9rH0N9dDEWbLqE1D70MY+oN7ZMVwDSooUESRx05Eg8szoDPY+JXHF8AWgigNUhesJkMVpshI+GNV/x3a9F2aRvTyk5QibMVcmNGYXdrIxzhX8VDWAWI1soy3vAorteHORzOdzWuPZm78MUYwTA1p7z1h7q4gfG3GIEThkCss72LE1m7mIwgTNeAlxWYXckxzhQC13pS1D2dWKLucQHhVqfU0QW5mPE0f/++oyx9trFr72Aaaw== root@ambari_slare2
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAki9g5Sy4WWXkDcz78bU5oq5flWk5JL9UeL62XC0qoapD63SjFep9aRWBSabxWHaENo7G/6ES8CI2kjTIwB1syMC8ropDAx+WbkSoLPwrwqapnK49OtQ0hnTs6QMAHey3ilzWfZxKmnk0yKavFqhbfPaBYps8ewXeGdPFsRaPIJzbInwXMw4/sB1hguA0rR55fs3vJR6Px1RGSt6fq/pxX7Wmug+3JShJras8ucs3F+C491f49dNwhQBdgjHCEFabhXeSZG3ngMBX8sOMhuN19Xg/oIaa2IKX4ckIu/LbwNw5lIc+6l9kVn0Y0BLeHux6gLaQM0EfwMbsvdOK/tGZrQ== root@ambari_slare1
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAtZacjGL5llcaJLQZtCKDzqg/CQPjKFRJDmo+bIFBfrlD5jAR78fXnlhxdqg8dvSVnSyU7q73bYrV7U+ym4lqq3J7JMRGuNSBBndnwu90I175w8V4IntPS9tv/oLo9zzsPrnKYmsxXguUahEOJJErImIQ4LPJ3oBUDISxfIjEckjlvkUNThUmOMxSHVwyvpwFBzDWBcYsYJtZJbZYOdNSQyOb3AFOgwkgR+sPj+C+Kdp6yP/Ua3r/yZGGgUR+NFLM8x7Oz236cmJVy0xVFrE3BxYIJDp+VBeWb8bTdI40XCPmRvb0wpLRFy9nj7i1EMzZ7xTvCTZo48oLBsxH/obd+w== root@ambari_master
8. yum -y groupinstall "Development tools"
9. yum -y install mysql*
10. yum -y install ruby* redhat-lsb* snappy*
制作ambari和hadoop本地源：
1. 创建本地源目录
选取一台服务器，安装http服务，安装完后会自动创建 /var/www/html 目录（我选的是251 ambari_master）
启动httpd 命令： service httpd start || /etc/init.d/httpd start
chkconfig httpd on
创建两个目录：
mkdir /var/www/html/ambari
mkdir /var/www/html/hdp
2.安装createrepo（在这里需要强制安装，添加：--force --nodeps）
2.1 [root@ambari_master Packages]# rpm -ivh createrepo-0.9.9-22.el6.noarch.rpm --force --nodeps
warning: createrepo-0.9.9-22.el6.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
Preparing... ########################################### [100%]
1:createrepo ########################################### [100%]
2.2 [root@ambari_master hdp]# yum install python*
（输出结果太多，这里就不粘贴了，自己试试）
3.ambari本地源创建
解压HDP-UTILS-1.1.0.20-centos6.tar.gz 到目录 /var/www/html/ambari
命令：tar zxvf HDP-UTILS-1.1.0.20-centos6.tar.tar -C /var/www/html/ambari
把Updates-ambari-2.2.1.0目录拷贝到目录 /var/www/html/ambary
cd /var/www/html/ambari/HDP-UTILS-1.1.0.20/repos/centos6
mkdir Updates-ambari-2.2.1.0
cp -r /var/www/html/ambari/Updates-ambari-2.2.1.0/ambari /var/www/html/ambari/HDP-UTILS-1.1.0.20/repos/centos6/Updates-ambari-2.2.1.0
进入/var/www/html/ambari 目录，执行命令：createrepo ./
ambari本地源制作完成
结果：
[root@ambari_master ambari]# createrepo ./
Spawning worker 0 with 50 pkgs
Workers Finished
Gathering worker results
Saving Primary metadata
Saving file lists metadata
Saving other metadata
Generating sqlite DBs
Sqlite DBs complete
[root@ambari_master ambari]# ls
HDP-UTILS-1.1.0.20 repodata Updates-ambari-2.2.1.0
4. hadoop本地源创建
把HDP-2.4.0目录拷贝到目录 /var/www/html/hdp
进入/var/www/html/hdp 目录，执行命令：createrepo ./
hadoop本地源制作完成
结果：
[root@ambari_master ambari]# cd ../hdp/
[root@ambari_master hdp]# createrepo ./
Spawning worker 0 with 179 pkgs
Workers Finished
Gathering worker results
Saving Primary metadata
Saving file lists metadata
Saving other metadata
Generating sqlite DBs
Sqlite DBs complete
[root@ambari_master hdp]# ls
HDP-2.4.0 repodata
5. 系统光盘本地源创建
[root@ambari_master ambari]# mount -o loop /mnt/iso/rhel-server-6.6-x86_64-dvd.iso /mnt/cdrom/
[root@ambari_master ambari]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
50G 11G 36G 24% /
tmpfs 2.0G 72K 2.0G 1% /dev/shm
/dev/sda1 477M 33M 419M 8% /boot
/dev/mapper/VolGroup-lv_home
45G 52M 43G 1% /home
/mnt/iso/rhel-server-6.6-x86_64-dvd.iso
3.6G 3.6G 0 100% /mnt/cdrom
[root@ambari_master ambari]#ls /mnt/iso/
rhel-server-6.6-x86_64-dvd.iso
[root@ambari_master ambari]# ls /mnt/cdrom/
EFI EULA_ja isolinux ResilientStorage
EULA EULA_ko LoadBalancer RPM-GPG-KEY-redhat-beta
EULA_de EULA_pt media.repo RPM-GPG-KEY-redhat-release
EULA_en EULA_zh Packages ScalableFileSystem
EULA_es GPL README Server
EULA_fr HighAvailability release-notes TRANS.TBL
EULA_it p_w_picpaths repodata
[root@ambari_master ambari]# cat /etc/yum.repos.d/myself.repo
[daxiong]
name=daxiong
baseurl=file:///mnt/cdrom
enabled=1
gpgcheck=1
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release
检验：
[root@ambari_master yum.repos.d]# yum repolist
Loaded plugins: product-id, refresh-packagekit, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
HDP-2.4 | 2.9 kB 00:00
HDP-2.4/primary_db | 61 kB 00:00
HDP-UTILS-1.1.0.20 | 2.9 kB 00:00
HDP-UTILS-1.1.0.20/primary_db | 31 kB 00:00
ambari-2.2.1 | 2.9 kB 00:00
ambari-2.2.1/primary_db | 31 kB 00:00
daxiong | 4.1 kB 00:00 ...
daxiong/primary_db | 3.1 MB 00:00 ...
repo id repo name status
HDP-2.4 HDP-2.4 179
HDP-UTILS-1.1.0.20 Hortonworks Data Platform Utils Version - HDP-UTILS-1.1.0.20 50
ambari-2.2.1 Ambari 2.2.1 50
daxiong daxiong 3,785
repolist: 4,064
6. mysql 的配置
CREATE USER 'ambari'@'%' IDENTIFIED BY 'ambari';
GRANT ALL PRIVILEGES ON *.* TO 'ambari'@'%';
CREATE USER 'ambari'@'localhost' IDENTIFIED BY 'ambari';
GRANT ALL PRIVILEGES ON *.* TO 'ambari'@'localhost';
CREATE USER 'ambari'@'ambari_master' IDENTIFIED BY 'ambari_master';
GRANT ALL PRIVILEGES ON *.* TO 'ambari'@'ambari_master';
FLUSH PRIVILEGES;
CREATE DATABASE hive;
FLUSH PRIVILEGES;
CREATE DATABASE ambari;
FLUSH PRIVILEGES;
CREATE USER 'hive'@'localhost' IDENTIFIED BY 'hive';
GRANT ALL PRIVILEGES ON *.* TO 'hive'@'localhost';
CREATE USER 'hive'@'%' IDENTIFIED BY 'hive';
GRANT ALL PRIVILEGES ON *.* TO 'hive'@'%';
CREATE USER 'hive'@'ambari_slave2'IDENTIFIED BY 'hive';
GRANT ALL PRIVILEGES ON *.* TO 'hive'@'ambari_slave2';
FLUSH PRIVILEGES;
CREATE USER 'rangeradmin'@'%' IDENTIFIED BY 'rangeradmin';
GRANT ALL PRIVILEGES ON *.* TO 'rangeradmin'@'%' with grant option;
CREATE USER 'rangeradmin'@'localhost' IDENTIFIED BY 'rangeradmin';
GRANT ALL PRIVILEGES ON *.* TO 'rangeradmin'@'localhost' with grant option;
CREATE USER 'rangeradmin'@'ambari_master' IDENTIFIED BY 'rangeradmin';
GRANT ALL PRIVILEGES ON *.* TO 'rangeradmin'@'ambari_master' with grant option;
FLUSH PRIVILEGES;
CREATE USER 'root'@'%' IDENTIFIED BY 'root';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%';
FLUSH PRIVILEGES;
7.查看yum源（检查，可以省略这步，我是为了后期安装简单所以放在这）
[root@slare2 ~]# ls /etc/yum.repos.d/
ambari.repo HDP.repo HDP-UTILS.repo mnt.repo redhat.repo rhel-source.repo
[root@slare2 ~]# cat /etc/yum.repos.d/ambari.repo
[ambari-2.2.1.]
name=Ambari 2.2.1
baseurl=http://192.168.1.253/ambari/
gpgcheck=0
enabled=1
[HDP-UTILS-1.1.0.20]
name=Hortonworks Data Platform Utils Version - HDP-UTILS-1.1.0.20
baseurl=http://192.168.1.253/ambari/
gpgcheck=0
enabled=1
[root@slare2 ~]# cat /etc/yum.repos.d/HDP-UTILS.repo
[HDP-UTILS-1.1.0.20]
name=HDP-UTILS-1.1.0.20
baseurl=http://192.168.1.253/ambari
path=/
enabled=1
gpgcheck=0
[root@slare2 ~]# cat /etc/yum.repos.d/HDP.repo
[HDP-2.4]
name=HDP-2.4
baseurl=http://192.168.1.253/hdp
path=/
enabled=1
gpgcheck=0[root@slare2 ~]#
8. 配置安装ambari
主节点：
yum -y install ambari-server（这步会自动安装postgresql数据库，我使用的是mysql，所以停掉它）
service postgresql stop
chkconfig postgresql off
scp /var/lib/ambari-server/resources/Ambari-DDL-MySQL-CREATE.sql root@ambari_slave2:/root
mysql数据库节点：
use ambari;
source /root/Ambari-DDL-MySQL-CREATE.sql;
FLUSH PRIVILEGES;
ambari-server setup
ambari-server start
JAVA_HOME=/usr/local/jdk1.7.0_79
cd /usr/share/java
rm -rf mysql-connector-java.jar
ln -s mysql-connector-java-5.1.17.jar mysql-connector-java.jar
ambari-server setup --jdbc-db=mysql --jdbc-driver=/usr/share/java/mysql-connector-java.jar
cp /usr/share/java/mysql-connector-java-5.1.17.jar /var/lib/ambari-server/resources/mysql-jdbc-driver.jar
vim /var/lib/ambari-server/resources/stacks/HDP/2.4/repos/repoinfo.xml
然后就可以到web界面安装hadoop集群以及所需的组件了，在web安装过程中会出现问题，我在这就不一一细说了，其实终端或者log中都有提示，或者就有答案，不会的一些问题可以直接在网上找找，一般都有。
echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag
echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag在web界面会到主节点的私钥，来识别子节点的机器：
gpgcheck=0[root@ambari_master ~]# cat .ssh/id_rsa
后期会有补充：看完有问题可以直接联系我，QQ：1591345922
