setup模块用来输出主机的一些基本信息

setup

使用setup输出节点基本信息

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[root@manager test-when]# ansible -i hosts all -m setup
10.100.235.228  SUCCESS => {
    "ansible_facts": {
        "ansible_apparmor": {
            "status": "disabled"
        },
        "ansible_architecture": "x86_64",
        "ansible_bios_date": "11/01/2019",
        "ansible_bios_version": "6.00",
        "ansible_cmdline": {
            "BOOT_IMAGE": "/vmlinuz-3.10.0-1127.el7.x86_64",
            "LANG": "en_US.UTF-8",
            "biosdevname": "0",
            "crashkernel": "auto",
            "net.ifnames": "0",
            "quiet": true,
            "rd.lvm.lv": "centos/swap",
            "rhgb": true,
            "ro": true,
            "root": "/dev/mapper/centos-root",
            "spectre_v2": "retpoline"
        },
        "ansible_date_time": {
####### 略

使用filter过滤节点的信息

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# 过滤主机名
[root@manager test-when]# ansible -i hosts all -m setup -a "filter=ansible_hostname"
10.100.235.228  SUCCESS => {
    "ansible_facts": {
        "ansible_hostname": "centos-57946c8559-4r9tk",
        "discovered_interpreter_python": "/usr/bin/python"
    },
    "changed": false
}

# 过滤ip地址
[root@manager test-tags]# ansible -i hosts all -m setup -a "filter=ansible_all_ipv4_addresses"

有了上面的信息，一般都会配合when做判断来使用

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[root@manager test-when]# cat debug-when.yaml
---
- name: test when
  hosts: all
  tasks:
  - name: test when
    debug:
      msg: "test when"
    when: when: ( ansible_nodename ==  "centos-57946c8559-4r9tk" )

常用节点信息

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ansible_all_ipv4_addresses          #仅显示ipv4的信息
ansible_devices                     #仅显示磁盘设备信息
ansible_distribution                #显示是什么系统，例centos,suse等
ansible_distribution_major_version  #显示是系统主版本
ansible_distribution_version        #仅显示系统版本
ansible_machine                     #显示系统类型，例32位，还是64位
ansible_eth0                        #仅显示eth0的信息
ansible_hostname                    #仅显示主机名
ansible_kernel                      #仅显示内核版本
ansible_lvm                         #显示lvm相关信息
ansible_memtotal_mb                 #显示系统总内存
ansible_memfree_mb                  #显示可用系统内存
ansible_memory_mb                   #详细显示内存情况
ansible_swaptotal_mb                #显示总的swap内存
ansible_swapfree_mb                 #显示swap内存的可用内存
ansible_mounts                      #显示系统磁盘挂载情况
ansible_processor                   #显示cpu个数(具体显示每个cpu的型号)
ansible_processor_vcpus             #显示cpu个数(只显示总的个数)