ansible安装及快速应用

1 安装epel源

yum install -y epel-release
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2 安装ansible

yum install -y ansible
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3 备份hosts文件

cp -p /etc/ansible/hosts /etc/ansible/hosts.bak
echo "#" > /etc/ansible/hosts
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4 编辑/etc/ansible/hosts文件

[k8s-master01]
192.168.3.81 ansible_ssh_user=root ansible_ssh_pass=21vianet ansible_ssh_port=22
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5 先手动ssh，不用输入密码退出

 ssh 192.168.3.81
The authenticity of host '192.168.3.81 (192.168.3.81)' can't be established.
ECDSA key fingerprint is SHA256:md9mvpbrZ+mgkRx4OHTQKI2EOqjJQUGjWeiaoRCsI3k.
ECDSA key fingerprint is MD5:38:6d:b1:dd:82:32:47:f7:9c:8b:5b:eb:1d:b1:28:bd.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.3.81' (ECDSA) to the list of known hosts.
root@192.168.3.81's password: 
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5 执行ping模块

# ansible -i /etc/ansible/hosts k8s-master01 -m ping
[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details
192.168.3.81 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    }, 
    "changed": false, 
    "ping": "pong"
}
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6 执行shell命令

# ansible -i /etc/ansible/hosts all -m shell -a "cat /etc/hosts"
[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details
192.168.3.81 | CHANGED | rc=0 >>
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.3.81 k8s-master
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7 执行copy模块

# ansible -i /etc/ansible/hosts all -m copy -a 'src=/etc/passwd dest=/tmp/passwd force=yes backup=yes'
[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details
192.168.3.81 | CHANGED => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    }, 
    "changed": true, 
    "checksum": "28d6e8e018458778ff571982da7f075c6b00064b", 
    "dest": "/tmp/passwd", 
    "gid": 0, 
    "group": "root", 
    "md5sum": "28391a2a51a52406b752bd81fab47ee1", 
    "mode": "0644", 
    "owner": "root", 
    "size": 895, 
    "src": "/root/.ansible/tmp/ansible-tmp-1661655079.71-34248-166099024075536/source", 
    "state": "file", 
    "uid": 0
}
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ansible -i /etc/ansible/hosts all -m copy -a ‘src=/etc/passwd dest=/tmp/passwd force=yes backup=yes’