1. 实现两台服务器的互相无密登陆
ubuntu的ip为10.20.31.202,主机名(hostname)为server204,全限定域名FQDN为server204
redhat 6的ip为10.20.31.201,主机名(hostname)为server201,全限定域名FQDN为server201
备注:hostname的查询用hostname命令。
fqdn的查询用hostname -f命令。
1.1 ubuntu修改主机名和全限定域名
主机名修改:
sudo nano /etc/hostname 在其中填写主机名即可。
全限定域名修改:
sudo nano /etc/hosts 在其中添加一行127.0.1.1 server204
1.2 redhat 6修改主机名和全限定域名
主机名修改:
sudo nano
/
etc
/
sysconfig
/
network 修改
HOSTNAME后值为server201
全限定域名修改:
sudo nano /etc/hosts 在其中添加一行127.0.1.1 server201
1.3 生成ssh密钥对
前提:服务器ssh服务已装好并可用。
生成密钥对:
ssh-keygen -t rsa -P ""
然后指定密钥对存储位置和文件名:
输入:/home/ubuntu/.ssh/id_rsa
在/home/ubuntu/.ssh目录下看到密钥对id_rsa和id_rsa.pub,前者为私钥,后者为公钥。
现在我们将公钥追加到authorized_keys中:
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys (备注:~默认代表用户目录,在此服务器上为/home/ubuntu目录)
ssh localhost 或 sshserver201
可以发现本机可以无密登陆到自己机器了。
注意:redhat 6需要修改authorized_keys的权限,(这一步很重要不然的话,SSH时仍然需要密码)
使用命令 chmod 600 authorized_keys
然后将ubuntu(server204)中id_rsa.pub公钥拷贝到redhat 6(server201)中/home/ubuntu目录下
执行命令 cat ~/id_rsa.pub >> ~/.ssh/authorized_keys 将此公钥添加到授信文件中
这样做之后,server204就能无密登陆到server201了。
同理,server201要能无密登陆到server204,需要将server201的公钥添加到server204的authorized_keys中。
2. 安装ambari
https://cwiki.apache.org/confluence/display/AMBARI/Install+Ambari+2.2.0+from+Public+Repositories
上面为官网教程,很详细,就不写了。
我是在ubuntu系统上安装的。
3. Ambari 的 网页配置
1、在浏览器中输入: http://10.20.31.202:8080/ 用户名密码都是admin
2、选择hadoop版本
3、进入集群部署界面,我的输入如下:
4、点击下一步,然后是安装ambari_client到redhat 6服务器
出现错误!
错误解决:
原因:自己ssh账号用的是ubuntu,不是root
网页中第三步ssh account更换为root后,需要server201用root账号登录,生成密钥对(前面是用ubuntu生成的密钥对),并将server204的公钥加入到自己的root
/.ssh/authorized_keys
中,注意修改
authorized_keys
权限为600。
上面做好之后还是报错,错误信息如下:
==========================
Creating target directory...
==========================
Command start time 2016-01-05 09:40:21
chmod: cannot access `/var/lib/ambari-agent/data': No such file or directory
Connection to server201 closed.
SSH command execution finished
host=server201, exitcode=0
Command end time 2016-01-05 09:40:22
==========================
Copying common functions script...
==========================
Command start time 2016-01-05 09:40:22
scp /usr/lib/python2.6/site-packages/ambari_commons
host=server201, exitcode=0
Command end time 2016-01-05 09:40:22
==========================
Copying OS type check script...
==========================
Command start time 2016-01-05 09:40:22
scp /usr/lib/python2.6/site-packages/ambari_server/os_check_type.py
host=server201, exitcode=0
Command end time 2016-01-05 09:40:22
==========================
Running OS type check...
==========================
Command start time 2016-01-05 09:40:22
Cluster primary/cluster OS family is ubuntu14 and local/current OS family is redhat6
Traceback (most recent call last):
File "/var/lib/ambari-agent/tmp/os_check_type1452004822.py", line 44, in
main()
File "/var/lib/ambari-agent/tmp/os_check_type1452004822.py", line 40, in main
raise Exception("Local OS is not compatible with cluster primary OS family. Please perform manual bootstrap on this host.")
Exception: Local OS is not compatible with cluster primary OS family. Please perform manual bootstrap on this host.
Connection to server201 closed.
SSH command execution finished
host=server201, exitcode=1
Command end time 2016-01-05 09:40:22
ERROR: Bootstrap of host server201 fails because previous action finished with non-zero exit code (1)
ERROR MESSAGE: Connection to server201 closed.
STDOUT: Cluster primary/cluster OS family is ubuntu14 and local/current OS family is redhat6
Traceback (most recent call last):
File "/var/lib/ambari-agent/tmp/os_check_type1452004822.py", line 44, in
main()
File "/var/lib/ambari-agent/tmp/os_check_type1452004822.py", line 40, in main
raise Exception("Local OS is not compatible with cluster primary OS family. Please perform manual bootstrap on this host.")
Exception: Local OS is not compatible with cluster primary OS family. Please perform manual bootstrap on this host.
Connection to server201 closed.
可以看出错误原因是:两台服务器操作系统不同,不能自动安装,需要自己手动安装引导程序。
操作系统不同问题的解决:
参考文档:http://pivotalhd.docs.pivotal.io/docs/install-ambari.html
和安装ambari-server类似,只不过安装命令改为sudo yum install ambari-agent
然后修改/etc/ambari-agent/conf/ambari-agent.ini文件,指定服务器为server204,如下图:
载启动ambari-agent,执行命令sudo ambari-agent start
选择手动注册,入下图:
然后发现注册成功!
然后有一些问题要解决,如若防火墙的关闭等
http://pivotalhd.docs.pivotal.io/docs/install-ambari.html
这个网页写的很详细。