单可以说是最重要的规范。让我们看看它是如何工作的。首先，inventory由host，组和默认值组成。
在本教程中，我们使用SimpleInventory插件。此inventory插件将所有相关数据存储在三个文件中。让我们从检查它们开始：
1 ---
2 host1.cmh:
3 hostname: 127.0.0.1
4 port: 2201
5 username: vagrant
6 password: vagrant
7 platform: linux
8 groups:
9 - cmh
10 data:
11 site: cmh
12 role: host
13 type: host
14 nested_data:
15 a_dict:
16 a: 1
17 b: 2
18 a_list: [1, 2]
19 a_string: "asdasd"
20
21 host2.cmh:
22 hostname: 127.0.0.1
23 port: 2202
24 username: vagrant
25 password: vagrant
26 platform: linux
27 groups:
28 - cmh
29 data:
30 site: cmh
31 role: host
32 type: host
33 nested_data:
34 a_dict:
35 b: 2
36 c: 3
37 a_list: [1, 2]
38 a_string: "qwe"
39
40 spine00.cmh:
41 hostname: 127.0.0.1
42 username: vagrant
43 password: vagrant
44 port: 12444
45 platform: eos
46 groups:
47 - cmh
48 data:
49 site: cmh
50 role: spine
51 type: network_device
52
53 spine01.cmh:
54 hostname: 127.0.0.1
55 username: vagrant
56 password: ""
57 platform: junos
58 port: 12204
59 groups:
60 - cmh
61 data:
62 site: cmh
63 role: spine
64 type: network_device
65
66 leaf00.cmh:
67 hostname: 127.0.0.1
68 username: vagrant
69 password: vagrant
70 port: 12443
71 platform: eos
72 groups:
73 - cmh
74 data:
75 site: cmh
76 role: leaf
77 type: network_device
78 asn: 65100
79
80 leaf01.cmh:
81 hostname: 127.0.0.1
82 username: vagrant
83 password: ""
84 port: 12203
85 platform: junos
86 groups:
87 - cmh
88 data:
89 site: cmh
90 role: leaf
91 type: network_device
92 asn: 65101
93
94 host1.bma:
95 groups:
96 - bma
97 platform: linux
98 data:
99 site: bma
100 role: host
101 type: host
102
103 host2.bma:
104 groups:
105 - bma
106 platform: linux
107 data:
108 site: bma
109 role: host
110 type: host
111
112 spine00.bma:
113 hostname: 127.0.0.1
114 username: vagrant
115 password: vagrant
116 port: 12444
117 platform: eos
118 groups:
119 - bma
120 data:
121 site: bma
122 role: spine
123 type: network_device
124
125 spine01.bma:
126 hostname: 127.0.0.1
127 username: vagrant
128 password: ""
129 port: 12204
130 platform: junos
131 groups:
132 - bma
133 data:
134 site: bma
135 role: spine
136 type: network_device
137
138 leaf00.bma:
139 hostname: 127.0.0.1
140 username: vagrant
141 password: vagrant
142 port: 12443
143 platform: eos
144 groups:
145 - bma
146 data:
147 site: bma
148 role: leaf
149 type: network_device
150
151 leaf01.bma:
152 hostname: 127.0.0.1
153 username: vagrant
154 password: wrong_password
155 port: 12203
156 platform: junos
157 groups:
158 - bma
159 data:
160 site: bma
161 role: leaf
162 type: network_devicehost文件基本上是一个映射，其中最外键是host的名称，然后是Host对象。您可以通过执行以下命令查看对象的架构：
from nornir.core.inventory import Host
import json
print(json.dumps(Host.schema(), indent=4))
1 ---
2 global:
3 data:
4 domain: global.local
5 asn: 1
6
7 eu:
8 data:
9 asn: 65100
10
11 bma:
12 groups:
13 - eu
14 - global
15
16 cmh:
17 data:
18 asn: 65000
19 vlans:
20 100: frontend
21 200: backendgroups_file遵循相同的hosts_file规则。
# groups file
%highlight_file inventory/groups.yaml
1 ---
2 global:
3 data:
4 domain: global.local
5 asn: 1
6
7 eu:
8 data:
9 asn: 65100
10
11 bma:
12 groups:
13 - eu
14 - global
15
16 cmh:
17 data:
18 asn: 65000
19 vlans:
20 100: frontend
21 200: backend最后，默认文件具有与我们之前描述的Host相同的架构，但是没有用于表示各个元素的外键。在本教程后面的部分，我们将看到如何使用组和默认文件中的数据。
# defaults file
%highlight_file inventory/defaults.yaml
1 ---
2 data:
3 domain: acme.local