Ansible reports an error: "MSG": "invalid/incorrect password: permission denied, please try again“

I'm doing it these days Ansible The experiment of , Make host variables , The user name and ssh password , Valid only if key pair authentication is not used

error

#Ansible The management end 
[[email protected] ansible]# vim hosts

[dbservers]
 192.168.109.134 ansible_port=2222 ansible_user=root ansible_password=000000

# Controlled end 
[[email protected] ~]# cat /etc/ssh/sshd_config |grep Port
Port 2222

[[email protected] ansible]# ansible 192.168.109.134 -a 'date'
192.168.109.134 | UNREACHABLE! => {
    "changed": false, 
    "msg": "Invalid/incorrect password: Permission denied, please try again.",
    "unreachable": true
}

  Prompt error , I'm surprised. , I thought it was a port problem , I changed it to default 22 port , It's the same mistake , The error message is said to be a password problem , I'll examine it carefully , The code is 000000 No problem , So I went online to check the problem , Got a very incredible answer , The beginning of the password is 0 You're going to report a mistake , So I went to try , Change to 123456 It was really successful .

success  

#Ansible End 
[[email protected] ansible]# vim hosts
[lhq]
 192.168.109.134 ansible_port=2222 ansible_user=root ansible_password=123123

# Managed end 
[[email protected] ~]# passwd
 Change user  root  Password  .
 new   password ：
 Invalid password ：  The password is less than  8  Characters 
 Reenter the new   password ：
passwd： All authentication tokens have been successfully updated .

 Modified into 123123

[[email protected] ansible]# ansible lhq -a 'date'
192.168.109.134 | CHANGED | rc=0 >>
2022 year  07 month  06 Japan   Wednesday  16:16:13 CST

After changing the password, it really succeeded , Is it true that the password starts with 0 Why , I'll try another password .

Other test conditions

because 131-133 I have done key pair verification before , So I'll restore the snapshot first

#Ansible The management end 
[[email protected] ansible]# vim hosts 
[webservers]
 192.168.109.131 ansible_user=root ansible_password=000000
 192.168.109.132 ansible_user=root ansible_password=012345
 192.168.109.133 ansible_user=root ansible_password=123123
 192.168.109.134 ansible_user=root ansible_password=101111

# Then go to each host to change the password 


[[email protected] ansible]# ansible webservers -a 'date'
192.168.109.134 | CHANGED | rc=0 >>
2022 year  07 month  06 Japan   Wednesday  16:55:01 CST
192.168.109.133 | CHANGED | rc=0 >>
2022 year  07 month  06 Japan   Wednesday  16:55:01 CST
192.168.109.131 | UNREACHABLE! => {
    "changed": false, 
    "msg": "Invalid/incorrect password: Permission denied, please try again.", 
    "unreachable": true
}
192.168.109.132 | UNREACHABLE! => {
    "changed": false, 
    "msg": "Invalid/incorrect password: Permission denied, please try again.", 
    "unreachable": true
}

[[email protected] ansible]# ansible webservers -m ping -o
192.168.109.134 | SUCCESS => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "ping": "pong"}
192.168.109.133 | SUCCESS => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "ping": "pong"}
192.168.109.131 | UNREACHABLE!: Invalid/incorrect password: Permission denied, please try again.
192.168.109.132 | UNREACHABLE!: Invalid/incorrect password: Permission denied, please try again.

131 and 132 There is something wrong with the machine , Their password is 0 start

Sure enough, as the brother on the Internet said ,,0-9 In the number of, just start with 0 The host password of will cause this error , No problem with other figures .