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新增集群时ssh免密登录配置

程序员文章站 2024-03-21 13:02:04
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一、准备工作

  1. 用客户端工具(ssh client或者putty)连接到linux服务器。在root用户下输入命令
    vi /etc/hosts,用vi编辑hosts文件,如下:
#127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

#::1  localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.1.160 cdh1
192.168.1.161 cdh2
192.168.1.162 cdh3
192.168.1.163 cdh4
192.168.1.118 cdh5(新增)
192.168.1.117 cdh6(新增)
<放入你所需要得所有机器>
  1. 对新增机器输入命令:cd .ssh进入rsa公钥私钥文件存放的目录,删除目录下的id_rsa,id_rsa.pub文件。

二、在每台机上产生新的rsa公钥私钥文件,并统一拷贝到一个authorized_keys文件中

  1. 登录cdh5,在.ssh目录下输入命令:
ssh-****** -t rsa

,三次回车后,该目录下将会产生id_rsa,id_rsa.pub文件。其他主机也使用该方式产生**文件。

新增cdh6也同样操作。

  1. 登录cdh5,输入命令:
cat id_rsa.pub >> authorized_keys

,将id_rsa.pub公钥内容拷贝到authorized_keys文件中。

  1. 将新增主机的公钥文件内容都拷贝到cdh1主机上的authorized_keys文件中,命令如下:
将公钥拷贝到目标主机的authorized_keys中,例如:(在所需配置得机器上,目标先把所有机器**全部复制到某一台)
ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected](在cdh5上执行操作)

ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected](在cdh6上执行操作)

此时cdh1配置了所有需要免密得机器(包括之前已有机器),
最终authorized_keys文件内容如下:

[[email protected] .ssh]# more authorized_keys

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAp7jp4a1/deK4B/eZW8kdiCQvzpKe4Id0uP0DdONFW85r

20rpH4ZpNSB7JNYFiqjMUPQ/2EWLXh7xoa9UntKsMVVcZr3BTiXRZ0Gx7IDacwz8Cq0qYrwUCMTKt7QF

xK5RwXyuZqDFjc2yC3/ZoqeyeLERFTll3ZLGeFsXhJjlkPTvtnvx0zX6lacPZL4VguoM5YHw3KaJg8bd

qehJzbQoPS8sm00ES4iygbR+Ixz1cnGTrtNU1S3lh4/y0PC6spMs9Z2Mf097FTLQJXJDiGqU9Tq3MHvl

srZFx92H4yeiJuYWJaZImuiq/feRIo30Dig6obEfuAn13vevdXozcXNlYQ== [email protected]

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAwpEgmBzfGw1mrKy3Ho8k/h4jrZlRdIzuLs6PKqDPV/Cw

2kjSYXV7tyGklUYWPWr1Dt6kw5+Ojr7zv+cFnFWKzTTAJz3V4md0RyQ11Kb+IJA7b88SRHcVLlNF2GDX

N2pVqh9lf6Zu6zfpnAjCg/mU8qzTrZfFZdzPtBppimMq+l0bolvgnxEEkpFTNkpHB8+cD732WL+KiW52

7nt0LGBbVbZz9mUa+0bsPGK7ySfk1SPUkGyNXXqVjEydyjvRY8bob7Q3mFX3MpDT696R8n7U7hQ7u4b8

gbe3rIuQcWwGseEQrGjIDhLb9am3dbgDuFeg73RJqFZMOp2y6zQF3jQIew== [email protected]

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAmc2M6Bzw1cPaDwjbtgynJPWRKv9pDnHjBSn5BDbIX0po

8GHHGr1pvYMGu4XWlIa76O44+bmF32K/9ECzBcNVL6a+aN5HWdUPpE6zagFUcaewXu2p4+FCZWpoTZbj

zHKGeay35Id+mpltZUWZlR5lOX+G/veNzuZNpKXnVYoZdAaJ3XlH6IVhKlGOuZkXxvD7e+YD4oxZw+4o

iaav/QtAhZHXWcAt2eVj9xw+j/3Ip5ImmIWHv5/AOFrgiY6c6U+2g5xOGONINbh9CxQ1L4HbQVAx8hYC

stWUm0LfFAcMwXDwb8RAFj+cH+D/xG6CrORLb4UfroJHa6N64rx/5dmz7w== [email protected]

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAxAsHr8Jp4vXI7bPGmSsO/+bT43GsxQ4GKdGf8qLPsFY+

/KluWl0TrRLwBVHGc94gpN2JOqtvKYYDSHw4Fj6KPSk/6Nt8CutZAwASoVxzexTFMOSwNFpTMsLc7Oza

Q3XG6v6PgtBEJqdUdl4zIFAZnkZjKmZp8SWG1jGo/vl3jsbrnmFQFeH04MdVcm9r1wvl80bdF9YvYEtg

ymHO4/tANKWSNKGw2EcthNWyQiN4hIYOoBQaUA3FlAXyqcD2+Q+2frf0gNF5KfKKLXmmlAuS9Oi6JqFJ

f1BLmMquI4n02owzU0zlkj3Px5IcCfQbDQ/JedHcjxEKP2S+9m3yxG4h2Q== [email protected]

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAyS1PbXTgFqHcGV/k0QUZni5xB5+q71qx4r5xto+WLkVQ

MiS3gR/VYZoyDLrQRVf5t0JiliCgHeU0MG/ASd1LPbsVYCX5V9cmcm1hMByDKJ6FwIxz5cY4y1dBpwAZ

2E24CQWfZuevaeIFnL80RGGLhRgCxbLb3aPvRZuV34utD+5kgAFJwYCQYN4KnFG1S5e4X6U5J3FsCDby

GD7dhtWWktMV2SAnWjrmULguaVRqO0sDIEiVSc9+KKqAmlOab+5SbZAI5+3hzJog5c3i4f5fHXWnxYqy

LNo3yYSWraV5KcYIlNPqX6iJKvjLWbNDwD3+70u4nWjBSXXufhff71LdHw== [email protected]

三、授权authorized_keys文件

  1. 登录cdh1,在.ssh目录下输入命令:
chmod 600 authorized_keys

,效果如下:

[[email protected] .ssh]# ls -al

total 28

drwx------.  2 root root 4096 Oct 24 12:27 .

dr-xr-x---. 22 root root 4096 Oct 24 19:20 ..

-rw-------.  1 root root 1975 Oct 24 12:27 authorized_keys

-rw-------.  1 root root 1975 Oct 24 12:09 authorized_keys_20141024

-rw-------.  1 root root 1675 Oct 24 12:23 id_rsa

-rw-r--r--.  1 root root  395 Oct 24 12:23 id_rsa.pub

-rw-r--r--.  1 root root 2020 Oct 24 12:10 known_hosts

四、将授权文件分配到其他主机上
1)此时cdh1上配置了所有机器得**, 登录cdh1,将授权文件拷贝到cdh2、cdh3…,(所有机器)命令如下:

进入当前authorized_keys目录:cd .ssh 
scp  authorized_keys  [email protected]:/home/hadoop(用户名)/.ssh/    #拷贝到cdh2上

scp  authorized_keys [email protected]:/home/hadoop(用户名)/.ssh/  #拷贝到cdh3上

scp  authorized_keys [email protected]:/home/hadoop(用户名)/.ssh/  #拷贝到cdh4上

scp  authorized_keys [email protected]:/home/hadoop(用户名)/.ssh/  #拷贝到cdh5上

scp  authorized_keys [email protected]:/home/hadoop(用户名)/.ssh/  #拷贝到cdh6上

2)所有机器得/etc/hosts下得主机名配置也得复制好

至此,免密码登录已经设定完成,注意第一次ssh登录时需要输入密码,再次访问时即可免密码登录

参考文献:https://www.cnblogs.com/ivan0626/p/4144277.html

相关标签: linux ssh免密