aboutsummaryrefslogtreecommitdiffstats
path: root/controlloop/common/policy-yaml/README-guard-v2.0.0.md
blob: e0416f4868e2a46e0fc28d5ed8a9038e49443a0c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
ECOMP Control Loop Guard

A control loop guard is a YAML specification for creating policy guard for ControlLoop.

1707 ECOMP Control Loop Guard Features:

* The Control Loop Guard can specify the frequency limiter and the blacklist of target entities but not both in the same Guard.
* Two parts are incorporated. One is the common guard header including guard version while the other part is a set of guard policies. 
* The Control Loop Guard should contain at least one guard policies.
* Each guard policy is bound to a specific Actor and Recipe.
* Each guard policy should have at least one limit constraints which define how the guard policy should be enforced.
* Supported Actors are APPC, MSO, SDNO, SDNR and AOTS. 

This SDK helps build the YAML specification for 1707 ECOMP Control Loop Guard.

# Create Builder Object

To begin with, the ControlLoopGuardBuilder.Factory class has static methods that one should use to begin building a Control Loop Guard. It will return a [ControlLoopGuardBuilder object](src/main/java/com/att/ecomp/policy/controlloop/policy/guard/builder/ControlLoopGuardBuilder.java) that can then be used to continue to build and define the Control Loop Guard.

```java
		ControlLoopGuardBuilder builder = ControlLoopGuardBuilder.Factory.buildControlLoopGuard(new Guard());
```

# Add Guard Policy

After a guard builder has been created, the next step would be to add a guard policy to the newly created Control Loop Guard via the builder. To add a guard policy, use the addGuardPolicy() method.

```java
		GuardPolicy policy = new GuardPolicy(
								"unique_guard_vUSP_1", 
								"APPC 5 Restart", 
								"We only allow 5 restarts over 15 minute window during the day time hours (i.e. avoid midnight to 5am)",
								"APPC", 
								"Restart");	
		builder = builder.addGuardPolicy(policy);
```

# Add Limit Constraint to a Guard Policy

The limit constraint defines the details of how to enforce the guard policy. Each limit constraint can contain two types of constraints - frequency limiter and black list. At least one type of constraints should be specified, otherwise the limit constraint will be counted as invalid. To add a limit constraint to an existing guard policy, use the addLimitConstraint() method.

```java
		Map<String, String> time_in_range = new HashMap<String, String>();
		time_in_range.put("arg2", "PT5H");
		time_in_range.put("arg3", "PT24H");
		List<String> blacklist = new LinkedList<String>();
		blacklist.add("vm_name_1");
		blacklist.add("vm_name_2");
		Constraint cons = new Constraint(5, "PT15M", time_in_range, blacklist);
		builder = builder.addLimitConstraint(policy.id, cons);
```


# Build the YAML Specification

When finished defining the Guard Policies, build the specification and analyze the [Results.java](src/main/java/com/att/ecomp/policy/controlloop/policy/builder/Results.java)

```java
		Results results = builder.buildSpecification();
		if (results.isValid()) {
			System.out.println(results.getSpecification());
		} else {
			System.err.println("Builder failed");
			for (Message message : results.getMessages()) {
				System.err.println(message.getMessage());
			}
		}
```

# Sample Code

Sample code is available in this project: https://codecloud.web.att.com/projects/ST_POLICY/repos/com.att.ecomp.policy.controlloop.sample/browse



# Use the YAML Specification to Generate the XACML Guard Policies

Now that you have a valid YAML specification, call the method in [PolicyGuardYamlToXacml.java](guard/src/main/java/com/att/ecomp/policy/guard/PolicyGuardYamlToXacml.java) to generate the XACML Guard Policies.

# YAML Specification

The YAML specification has 2 sections to it: [guard](#guard-object) and [guards](#guards-array). The [guard section](#guard-object) section is simply a header defining the version of this guard. The [guards section](#guards-array) is simply an array of [GuardPolicy objects](#guardpolicy-object).

## guard Object

| Field Name      | Type          | Required   | Description  |
| -------------   |:-------------:| -----------| ------------:|
| version         | string        | required   | Value for this release if 2.0.0 |


## guards array

The guards section is an array of [GuardPolicy objects](#guardpolicy-object).

### GuardPolicy Object

| Field Name      | Type          | Required   | Description  |
| -------------   |:-------------:| -----------| ------------:|
| id              | string        | required   | Unique ID for the policy. |
| name            | string        | required   | Policy name |
| description     | string        | optional   | Policy description |
| actor           | string        | required   | Name of the actor for this operation: Example: APPC |
| recipe          | string        | required   | Name of recipe to be performed. Example "Restart" |
| limit_constraints  | array of [constraint](#constraint-object) object | required | Constraints used to enforce the guard policy |

The guard policy is bound to a specific recipe performed by the actor. When the Control Loop tries to perform the recipe operation by the actor, this guard policy should be evaluated against all the specified constraints. If any of the constraints will be violated, the operation should be abandoned.

#### constraint Object

| Field Name      | Type          | Required   | Description  |
| -------------   |:-------------:| -----------| ------------:|
| num             | integer       | required if blacklist is not specified  | The limited number of the same operations |
| duration        | string        | required if blacklist is not specified  | Time window for counting the same operations |
| time_in_range   | map<string, string> | optional   | Valid time spans for enforcing the guard policy |
| blacklist       | array of string     | required if num and duration are not specified | A list of the entity names that should not be touched by the Control Loop |

The first three attributes define the frequency limiter which means that only a limited number of the same operations can be allowed within each valid time window. The last attribute defines a blacklist of the target entities on which the Control Loop should not perform the operation.
  
The "duration" parameter should have one of the following values: [5min, 10min, 30min, 1h, 12h, 1d, 5d, 1w, 1mon].

  
## Examples of YAML Control Loop Guards for 1707

[1707-vUSP-Guard](src/test/resources/v2.0.0-guard/policy_guard_vUSP_1707_appc.yaml)
[1707-eNodeB-Ericsson-Frequency-Limiter-Guard](template.enodeb/src/test/resources/policy_guard_eNodeB_1707_sdnr_reset.yaml)
[1707-eNodeB-Ericsson-Blacklist-Guard](template.enodeb/src/test/resources/policy_guard_vUSP_1707_sdnr_reset_blacklist.yaml)
[OpenECOMP-vDNS-Guard](src/test/resources/v2.0.0-guard/policy_guard_OpenECOMP_demo_vDNS.yaml)


### 1707 vUSP Guard
```
guard:
  version: 2.0.0

guards:
  - id: unique_guard_vUSP_1
    name: APPC 5 Restart
    description: 
      We only allow 5 restarts over 15 minute window during the day time hours (i.e. avoid midnight to 5am)
    actor: APPC
    recipe: Restart
    limit_constraints:
      - num: 5
        duration: PT15M
        time_in_range:
          arg2: PT5H
          arg3: PT24H	
```

### 1707 eNodeB Ericsson Frequency Limiter Guard
```
guard:
  version: 2.0.0

guards:
  - id: unique_guard_eNodeB_Ericsson
    name: SDNR 1 Reset
    description: |
      We only allow 1 reset over 24 hour window
    actor: SDNR
    recipe: Reset
    limit_constraints:
      - num: 100
        duration: 1d
        time_in_range:
          arg2: 00:00:00-05:00
          arg3: 23:59:59-05:00
```

### 1707 eNodeB Ericsson Blacklist Guard
```
guard:
  version: 2.0.0

guards:
  - id: unique_guard_eNodeB_Ericsson_Blacklist
    name: SDNR Reset Blacklist
    description: |
      We deny restart of the blacklisted targets (avoid midnight to 5am)
    actor: APPC
    recipe: Reset
    limit_constraints:
      - blacklist:
          - HNVJAL22_DMH1_U_L
          - MNYKAQ35_DMH1_U_L
        time_in_range:
          arg2: 00:00:00-05:00
          arg3: 23:59:59-05:00
```

### OpenECOMP vDNS Guard
```
guard:
  version: 2.0.0

guards:
  - id: unique_guard_ONAP_vDNS_1
    name: MSO Spinup
    description: We only spin up 1 instance over a 10 minute window
    actor: MSO
    recipe: VF Module Create
    limit_constraints:
      - num: 1
        duration: PT10M
```