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# dcae-policy plugin and node-type
- python-package dcaepolicyplugin to be used in cloudify plugins to retrieve the policy from policy-handler
---
## dcaepolicy node type [dcaepolicy-node-type.yaml](./dcaepolicy-node-type.yaml)
- node type for dcae.nodes.policy
- node type for dcae.nodes.policies
---
## discovery of policy-handler
- dcaepolicyplugin will first try finding the record of ```policy_handler``` in consul services.
- if failed, it will try finding config for "dcaepolicyplugin" in consul-kv
-- the config structure is expected to contain url to policy_handler
-- example of config value for key=```dcaepolicyplugin```:
```json
{ "dcaepolicyplugin" : { "policy_handler" : { "url" : "http://policy-handler:25577" } } }
```
- if still not found, it will default to hardcoded url of ```http://policy-handler```
---
## Usage
import the dcaepolicy-node-type.yaml into your blueprint to use the dcae.nodes.type node
```yaml
imports:
- https://YOUR_NEXUS_RAW_SERVER/type_files/dcaepolicy/2.2.1/node-type.yaml
```
provide the value for policy_id property
```yaml
node_templates:
...
host_capacity_policy:
type: dcae.nodes.policy
properties:
policy_id: { get_input: host_capacity_policy_id }
```
Then the dcaepolicyplugin will bring the latest policy to the dcae.nodes.policy node during the install workflow of cloudify.
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