SaltStack之salt-ssh

• salt-ssh介绍
• • salt-ssh的特点
  • salt-ssh远程管理的方式
• salt-ssh管理
• • 通过使用用户名密码的SSH实现远程管理
  • 免密登录
  • 通过salt-ssh初始化系统安装salt-minion

salt-ssh可以让我们不需要在受控机上安装salt-minion客户端也能够实现管理操作。

• 远程系统需要Python支持，除非使用-r选项发送原始ssh命令
• salt-ssh是一个软件包，需安装之后才能使用，命令本身也是salt-ssh
• salt-ssh不会取代标准的Salt通信系统，它只是提供了一个基于SSH的替代方案，不需要ZeroMQ和agent

salt-ssh有两种方式实现远程管理，一种是在配置文件中记录所有客户端的信息，诸如 IP 地址、端口号、用户名、密码以及是否支持sudo等；另一种是使用密钥实现远程管理，不需要输入密码。

在 master 上安装 salt-ssh

[root@master ~]# yum -y install salt-ssh

修改配置文件，添加受控机信息

# Sample salt-ssh config file
#web1:
#  host: 192.168.42.1 # The IP addr or DNS hostname
#  user: fred         # Remote executions will be executed as user fred
#  passwd: foobarbaz  # The password to use for login, if omitted, keys are used
#  sudo: True         # Whether to sudo to root, not enabled by default
#web2:
#  host: 192.168.42.2
node1:
  host: 192.168.172.143
  user: root
  passwd: 8
 

第一次联通需要很长时间，所以我们可以写一个config文件，让它进行非交互方式登录

[root@master ~]# vim ~/.ssh/config
StrictHostKeyChecking no

测试连通性

[root@master ~]# salt-ssh '*' test.ping
Permission denied for host node1, do you want to deploy the salt-ssh key? (password required):
[Y/n] y
Password for root@node1: 
node1:
    True

[root@master ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:fcHhZ3Jmo6curhWhbeiZHn53glIbSjEoYSAtCrKfMUA root@master
The key's randomart image is:
+---[RSA 3072]----+
|oE..        .    |
|=.. o      o .   |
|++ . . .  . = B  |
|o o . . o= . X . |
| . + .  So= o .  |
|  o    ..+oo o   |
|       .=o.+.    |
|       ooo=.o .  |
|        +=.o.o   |
+----[SHA256]-----+
[root@master ~]# ssh-copy-id root@192.168.172.143
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.172.143's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.172.143'"
and check to make sure that only the key(s) you wanted were added.

[root@master ~]# salt-ssh '*' test.ping
node1:
    True

[root@master ~]# cd /srv/salt/base/init/salt-minion/
[root@master salt-minion]# vim main.sls 
include:
  - init.yum.main

salt-minion:
  pkg.installed

/etc/salt/minion:
  file.managed:
    - source: salt://init/salt-minion/files/minion.j2
    - user: root
    - group: root
    - mode: '0644'
    - template: jinja
    - require:
      - pkg: salt-minion 

salt-minion.service:
  service.running:
    - enable: true
    - reload: true
    - watch:
      - file: /etc/salt/minion

[root@master ~]# vim /srv/salt/base/init/salt-minion/files/minion.j2 
......
#master: salt
master: {{ pillar['master_ip'] }}		
# Set http proxy information for the minion when doing requests
......

[root@master ~]# cat /srv/pillar/base/salt-minion.sls 
master_ip: 192.168.172.142

[root@master ~]# cat /srv/pillar/base/top.sls 
base:
  '*':
    - salt-minion

[root@master ~]# salt-ssh 'node1' state.sls init.salt-minion.main

//安装完成后删除密钥
[root@node1 ~]# rm -f .ssh/authorized_keys
[root@master ~]# salt-key -L
Accepted Keys:
Denied Keys:
Unaccepted Keys:
192.168.172.142
192.168.172.143
Rejected Keys: