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SaltStack实战之配置管理-YAML编写技巧
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SaltStack 实战之配置管理-YAML 编写技巧
[TOC]
1. 概述和内容
salt 包含一个健壮且灵活的配置管理框架，它构建在远程执行核心上。这个框架运行于 minion 上，它通过特定呈现语言的 state 文件，即可轻松地同时配置成千上万的主机。
后面配置管理所介绍的内容有： * file_roots 设置状态文件的位置
envBase 环境 开发、测试、预生产环境、生产环境SLSYAML Jinja 编写技巧state模块 file pkg service cmdstate关系 require require_in watch watch_in unless onlyif- 实践案例 LAMP LNMP Zabbix Haproxy+keepalived
- 项目实战 OpenStack 自动化部署
2. YAML 编写技巧
2.1 缩进
- YAML 使用一个固定的缩进风格表示数据层结构关系。salt 需要每个缩进级别使用 2 个空格。
- 不要使用 table 键。
2.2 冒号
冒号 2 边表示 key 和 value。
my_key: my_value
second_key: second_value
2.3 短横线
想要表示列表项，使用一个短横杠加一个空格。多个项使用同样的缩进级别作为同一列表的一部分。
my_dictionary:
- list_value_one
- list_value_two
- list_value_three
3. 同步文件实战
下面介绍同步 Linux 下 dns 配置文件/etc/resolv.conf。
vim /etc/salt/master
state_top: top.sls
file_roots:
base:
- /srv/salt
dev:
- /srv/salt/dev
test:
- /srv/salt/test
prod:
- /srv/salt/prod
[root@salt-master112 salt]# mkdir dev test prod
[root@salt-master112 salt]# cat top.sls
yaml
base:
'*':
- init.dns
[root@salt-master112 salt]# cat init/dns.sls
/etc/resolv.conf:
file.managed:
- source:
- salt://init/files/resolv.conf
- user: root
- group: root
- mode: 644
[root@salt-master112 salt]# cat init/files/resolv.conf
nameserver 10.1.0.2
nameserver 114.114.114.114
执行文件同步
[root@salt-master112 salt]# salt '*' state.highstate
node1.test.com:
----------
ID: /etc/resolv.conf
Function: file.managed
Result: True
Comment: File /etc/resolv.conf updated
Started: 17:50:20.016276
Duration: 39.221 ms
Changes:
----------
diff:
---
+++
@@ -1,3 +1,2 @@
-# Generated by NetworkManager
nameserver 10.1.0.2
nameserver 114.114.114.114
Summary for node1.test.com
------------
Succeeded: 1 (changed=1)
Failed: 0
------------
Total states run: 1
Total run time: 39.221 ms
master.test.com:
----------
ID: /etc/resolv.conf
Function: file.managed
Result: True
Comment: File /etc/resolv.conf updated
Started: 01:47:36.747919
Duration: 32.041 ms
Changes:
----------
diff:
---
+++
@@ -1,3 +1,2 @@
-# Generated by NetworkManager
nameserver 10.1.0.2
nameserver 114.114.114.114
Summary for master.test.com
------------
Succeeded: 1 (changed=1)
Failed: 0
------------
Total states run: 1
Total run time: 32.041 ms
node2.test.com:
----------
ID: /etc/resolv.conf
Function: file.managed
Result: True
Comment: File /etc/resolv.conf updated
Started: 17:50:20.642481
Duration: 58.623 ms
Changes:
----------
diff:
---
+++
@@ -1,3 +1,2 @@
-# Generated by NetworkManager
nameserver 10.1.0.2
nameserver 114.114.114.114
Summary for node2.test.com
------------
Succeeded: 1 (changed=1)
Failed: 0
------------
Total states run: 1
Total run time: 58.623 ms
[root@salt-master112 salt]# .test.com:
----------
ID: /etc/resolv.conf
Function: file.managed
Result: True
Comment: File /etc/resolv.conf updated
Started: 01:40:04.210096
Duration: 29.966 ms
Changes:
----------
diff:
---
+++
@@ -1,2 +1,3 @@
# Generated by NetworkManager
nameserver 10.1.0.2
+nameserver 114.114.114.114
Summary for master.test.com
------------
Succeeded: 1 (changed=1)
Failed: 0
------------
Total states run: 1
Total run time: 29.966 ms
node1.test.com:
----------
ID: /etc/resolv.conf
Function: file.managed
Result: True
Comment: File /etc/resolv.conf updated
Started: 17:42:47.647214
Duration: 50.04 ms
Changes:
----------
diff:
---
+++
@@ -1,2 +1,3 @@
-
+# Generated by NetworkManager
nameserver 10.1.0.2
+nameserver 114.114.114.114
Summary for node1.test.com
------------
Succeeded: 1 (changed=1)
Failed: 0
------------
Total states run: 1
Total run time: 50.040 ms
node2.test.com:
----------
ID: /etc/resolv.conf
Function: file.managed
Result: True
Comment: File /etc/resolv.conf updated
Started: 17:42:48.218295
Duration: 70.125 ms
Changes:
----------
diff:
---
+++
@@ -1,2 +1,3 @@
-
+# Generated by NetworkManager
nameserver 10.1.0.2
+nameserver 114.114.114.114
Summary for node2.test.com
------------
Succeeded: 1 (changed=1)
Failed: 0
------------
Total states run: 1
Total run time: 70.125 ms
在 minion 端查看下/etc/resolv.conf。
[root@im109 ~]# cat /etc/resolv.conf
nameserver 10.1.0.2
nameserver 114.114.114.114
[root@im109 ~]#
发现文件已更新。