ansible生產環境使用場景(二)

前言:html

​ 生產上新入網的服務器都須要安裝prometheus的監控客戶端軟件,主要步驟有:新建監控用戶、拷貝客戶端軟件、拉起客戶端進程、開機自啓動。本文記錄了使用ansible的role方式批量快速的安裝該客戶端軟件。node

​ 本文使用到的主要模塊:user、stat、copy、shell、script、lineinfile等。python

環境說明:git

主機名 操做系統版本 ip ansible version 備註
ansible Centos 7.6.1810 172.27.34.51 2.9.9 ansible管理服務器
ansible-awx Centos 7.6.1810 172.27.34.50 / 被管服務器

1、建立目錄列表

[root@ansible ~]# cd /etc/ansible/roles         
[root@ansible roles]# ansible-galaxy init prometheus
- Role prometheus was created successfully
[root@ansible roles]# tree prometheus
prometheus
├── defaults
│   └── main.yml
├── files
├── handlers
│   └── main.yml
├── meta
│   └── main.yml
├── README.md
├── tasks
│   └── main.yml
├── templates
├── tests
│   ├── inventory
│   └── test.yml
└── vars
    └── main.yml

8 directories, 8 files

image-20200801154532425

使用ansible-galaxy命令初始化role的目錄github

2、生成密碼

1.安裝pip3

[root@ansible ~]# yum -y install python3-pip

2.安裝passlib模塊

[root@ansible ~]# cd /tmp
[root@ansible tmp]# pip3 download passlib==1.7.2 -d /tmp/pkg
[root@ansible tmp]# more requirements.txt 
passlib==1.7.2
[root@ansible tmp]# pip3 install --no-index --find-links=./pkg -r requirements.txt 
WARNING: Running pip install with root privileges is generally not a good idea. Try `pip3 install --user` instead.
Collecting passlib==1.7.2 (from -r requirements.txt (line 1))
Installing collected packages: passlib
Successfully installed passlib-1.7.2

生產密碼會使用到Python的passlib模塊web

3.生成密碼密文

[root@ansible ~]# python3 -c "from passlib.hash import sha512_crypt; import getpass; print(sha512_crypt.using(rounds=5000).hash(getpass.getpass()))"
Password: 
$6$irgqm/Fea6/O07B7$LJpYtZoKqUkF.pN4D71LX2Cac3TNrF2.1GKGLfaSWxvKupknNLbWNcYym3LuojT3BqUeUCgsrmD/M6FqTx4lK/

image-20200801155016968

輸入明文密碼會生成密碼密文,複製該密碼,後面建立用戶時會用到。shell

3、文件總覽

1.執行文件

[root@ansible ansible]# pwd
/etc/ansible
[root@ansible ansible]# more prometheus.yaml 
---
- hosts: "{{ hostlist }}"
  gather_facts: no
  roles:
  - role: prometheus

2.task文件

[root@ansible ~]# cd /etc/ansible/roles
[root@ansible roles]# more prometheus/tasks/main.yml 
---
# tasks file for prometheus
# author: loong576

- name: user search
  shell: id {{ user_name }}
  register: user_search
  ignore_errors: true

- name: user add 
  user: 
    name: "{{ user_name }}"
    shell: "{{ user_bash }}"
    password: "{{ user_password }}"
  when: user_search.failed == true

- name: file search
  stat:
    path: "{{ file_dest }}/{{ file_src }}"    
  register: file_search

- name: copy files
  copy:
    src: "{{ file_src }}"
    dest: "{{ file_dest }}"
    mode: 0755
  when: file_search.stat.exists == false

- name: process search
  shell: "ps -ef|grep node_exporter |grep -v grep"
  register: process
  ignore_errors: true

- name: install node_exporter
  environment:
    dest: "{{ file_dest }}"
    src: "{{ file_src }}"
    port: "{{ node_port }}"
  script:
    startup.sh
  register: start
  tags: start
  when: process.failed  == true 

- name: exec when startup
  lineinfile:
    dest: /etc/rc.local
    line: nohup {{ file_dest }}/{{ file_src }} --web.listen-address=:{{ node_port }} >/dev/null &

執行邏輯爲:判斷被執行主機上有無監控用戶,若無則新增;判斷被執行主機有無客戶端文件,若無則拷貝;判斷被執行主機有無客戶端進程,若無則拉起;最後設置客戶端進程開機自啓動。bash

3.default文件

[root@ansible roles]# more prometheus/defaults/main.yml 
---
# defaults file for prometheus
user_name: sysmonitor 
user_bash: /bin/bash
user_password: $6$bB7R8JF3U7L7s/3E$fKOQwpoZ7RESfMmX6uqts1gw4yeXniRNctI2JRBRS2/120EgrHCWS3DboiRhO5sN0CjoVxvtAKgeDVQRaPlc0/

file_src: node_exporter
file_dest: /home/sysmonitor

node_port: 9100

定義監控用戶的用戶名、shell、密碼,客戶端執行文件的文件名、文件路徑和端口。服務器

4.file文件

[root@ansible roles]# ll prometheus/files/
總用量 16512
-rw-r--r-- 1 root root 16900416 7月  30 16:04 node_exporter
-rwxr--r-- 1 root root      102 7月  31 11:32 startup.sh
[root@ansible roles]# more prometheus/files/startup.sh 
#/bin/bash
echo $dest
echo $src
echo $port

nohup $dest/$src --web.listen-address=:$port >/dev/null &

file文件有兩個,node_exporter爲客戶端執行文件,startup.sh爲客戶端進程拉起腳本。ide

4、運行role

[root@ansible ansible]# pwd 
/etc/ansible
[root@ansible ansible]# ansible-playbook prometheus.yaml  -e hostlist=test50

image-20200801162837735

‘ -e hostlist=test50’指定被執行的主機爲test50,即172.27.34.50

5、運行結果複覈

image-20200801162918444

登錄被管主機test50,發現監控用戶和監控進程都在且加入到了開機自啓動文件中,符合預期。

 

 

本文全部腳本和配置文件已上傳github:ansible-production-practice-2

更多請點擊:ansible系列文章

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