Centos8 install Ansible

centos8 install ansible

# 安装epel扩展源

yum install epel -release

#或者用dnf
dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm -y

# dnf安装ansible

dnf install ansible

#更新ansible 

yum upgrade ansible

#查看ansible文件
rpm -qa |grep ansible

rpm -ql ansible |more

Modify host list

vi  /etc/ansible/hosts

Change to the following:

 [webservers]
192.168.40.128
192.168.40.129

 [dbservers]

 db01.intranet.mydomain.net
 db02.intranet.mydomain.net
 10.25.1.56
 10.25.1.57

Use ansible to communicate with the managed machine

ansible webservers -m ping -uroot -k

Error:

192.168.40.129 | FAILED! => { "msg": "Using a SSH password instead of a key is not possible because Host Key checking is enabled and sshpass does not support this. Please add this host's fingerprint to your known_hosts file to manage this host." }

192.168.40.128 | SUCCESS => { "ansible_facts": { "discovered_interpreter_python": "/usr/libexec/platform-python" }, "changed": false, "ping": "pong" }

One succeeded and the other failed because 192.168.40.129 has not been connected with ssh 192.168.40.129

Or, modify ansible.cfg 

vim /etc/ansible/ansible.cfg

#host_key_checking = False  //去掉#

 

[webservers]
192.168.40.128 ansible_ssh_user=root ansible_ssh_pass=123456
192.168.40.129 ansible_ssh_user=root ansible_ssh_pass=123456

 ansible webservers -m ping
192.168.40.129 | UNREACHABLE! => {
    "changed": false,
    "msg": "Invalid/incorrect password: Permission denied, please try again.",
    "unreachable": true
}
192.168.40.128 | UNREACHABLE! => {
    "changed": false,
    "msg": "Invalid/incorrect password: Permission denied, please try again.",
    "unreachable": true
}

vi /etc/ssh/sshd_config

# Authentication:
LoginGraceTime 120
PermitRootLogin yes
StrictModes yes