ansible 初级使用
yum install ansible -y
设置本机免密钥登录到 192.168.1.21
ssh-copy-id 192.168.1.21
vim /etc/ansible/hosts 添加2行
[web]
192.168.1.21命令行操作方法，：ansible 主机组或ip  -m  指定模块  -a 模块对应的参数ansible 192.168.1.21 -m shell -a "echo hello"
192.168.1.21 | SUCCESS | rc=0 >>
helloansible 192.168.1.21 -m setup # 主机所有信息
ansible 192.168.1.21 -m setup -a "filter=ansible_hostname" # 用setup模块取得主机名
192.168.1.21 | SUCCESS => {"ansible_facts": {"ansible_hostname": "21hostname"}, "changed": false
}ansible web -m shell -a "echo hello"
192.168.1.21 | SUCCESS | rc=0 >>
hello编写简单的play-book
cat test.yml
---- hosts: 192.168.1.21tasks:- name: just test ansibleshell: echo hello- name: get hostnamesetup: filter=ansible_hostname执行
ansible-play test.ymlPLAY [192.168.1.21] ********************************************************************************************************************************************************TASK [Gathering Facts] *****************************************************************************************************************************************************
ok: [192.168.1.21]TASK [just test ansible] ***************************************************************************************************************************************************
changed: [192.168.1.21]TASK [get hostname] ********************************************************************************************************************************************************
ok: [192.168.1.21]PLAY RECAP *****************************************************************************************************************************************************************
192.168.1.21               : ok=3    changed=1    unreachable=0    failed=0 如需要指定其他ip，可以---- hosts: all  # 这改成alltasks:- name: just test ansibleshell: echo hello- name: get hostnamesetup: filter=ansible_hostname
ansible-playbook -i '192.168.1.21,'  test.yml   # -i 指定执行清单 记得192.168.1.21, 后面有逗号.play-book 中传入默认变量
---
- hosts: 192.168.1.146remote_user: rootvars:- hello: hello-world          # 设定hello 变量的默认值为 hello-worldgather_facts: false       # 可选参数tasks:- name: var testshell: echo {{ hello }} > /dev/pts/0
ansible-play a.yml  输出为hello-world
ansible-play a.yml -e hello=xiaoming 输出为小明ansible play-book 一个套路，记得最基本的方法，使用其他模块一样的。play-book 中做条件判断- name: check kafka shell: pip list | grep kafka | wc -lignore_errors: Trueregister: check_kafka
- name: pip install kafka-1.3.5 shell: pip install {{ item }}with_items:- kafkawhen: check_kafka.stdout == "0" 判断是否已经安装了kafka 没安装则安装，已安装则跳过。- name: install zabbix-agent for centos-7yum: name=zabbix22-agent.x86_64 state=presentwhen: ansible_os_family == "RedHat" and  ansible_distribution_major_version  == "7"判断是否是redhat或centos 7 版本，来安装对应的包。