内置策略类型
本文档将介绍 KubeVela 内置的各个策略类型。
apply-once
简介
允许被部署资源的配置漂移。
参数
| 参数名 | 类型 | 说明 |
|---|---|---|
| enable | bool | 当设置为 true 时，将允许配置飘逸 |
示例
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: apply-once-app
spec:
components:
- name: hello-world
type: webservice
properties:
image: oamdev/hello-world
traits:
- type: scaler
properties:
replicas: 1
policies:
- name: apply-once
type: apply-once
properties:
enable: true
garbage-collect
简介
为应用配置垃圾回收行为。
参数
| 参数名 | 类型 | 说明 |
|---|---|---|
| keepLegacyResource | bool | 如果为 true，过时的版本化 resource tracker 将不会自动回收。 过时的资源将被保留，直到手动删除 resource tracker。 |
| rules | []GarbageCollectPolicyRule | 在资源级别控制垃圾回收策略的规则列表，如果一个资源由多个规则控制，将使用第一个规则。 |
GarbageCollectPolicyRule
| 参数名 | 类型 | 说明 |
|---|---|---|
| selector | GarbageCollectPolicyRuleSelector | 选择规则的目标资源。 |
| strategy | String | 目标资源循环利用的策略。 可用值：never、onAppDelete、onAppUpdate。 |
GarbageCollectPolicyRuleSelector
| 参数名 | 类型 | 说明 |
|---|---|---|
| componentNames | []String | 按组件名称选择目标资源。 |
| componentTypes | []String | 按组件类型选择目标资源。 |
| traitTypes | []String | 按 trait 类型选择目标资源。 |
示例
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: first-vela-app
spec:
components:
- name: express-server
type: webservice
properties:
image: oamdev/hello-world
port: 8000
traits:
- type: ingress-1-20
properties:
domain: testsvc.example.com
http:
"/": 8000
policies:
- name: keep-legacy-resource
type: garbage-collect
properties:
keepLegacyResource: true
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: garbage-collect-app
spec:
components:
- name: hello-world-new
type: webservice
properties:
image: oamdev/hello-world
traits:
- type: expose
properties:
port: [8000]
policies:
- name: garbage-collect
type: garbage-collect
properties:
rules:
- selector:
traitTypes:
- expose
strategy: onAppDelete
Override
简介
描述部署资源时要覆盖的配置。
参数
| 参数名 | 类型 | 说明 |
|---|---|---|
| components | []ComponentPatch | 要覆盖的组件配置列表。 |
| selector | []String | 要使用的组件名称列表。 如果未设置，将使用所有组件。 |
ComponentPatch
| 参数名 | 类型 | 说明 |
|---|---|---|
| name | string | 要覆盖的组件的名称。 如果未设置，它将匹配具有指定类型的所有组件。 可以与通配符 * 一起使用以进行模糊匹配。 |
| type | String | 要覆盖的组件的类型。 如果未设置，将匹配所有组件类型。 |
| properties | Object | 要合并的组件属性。 |
| traits | []TraitPatch | 要覆盖的 trait 配置列表。 |
TraitPatch
| 参数名 | 类型 | 说明 |
|---|---|---|
| type | String | 要覆盖的 trait 类型。 |
| properties | Object | 要合并的 trait 属性。 |
| disable | bool | 如果为 true，该 trait 将被删除。 |
示例
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: deploy-with-override
namespace: examples
spec:
components:
- name: nginx-with-override
type: webservice
properties:
image: nginx
policies:
- name: topology-hangzhou-clusters
type: topology
properties:
clusterLabelSelector:
region: hangzhou
- name: topology-local
type: topology
properties:
clusters: ["local"]
namespace: examples-alternative
- name: override-nginx-legacy-image
type: override
properties:
components:
- name: nginx-with-override
properties:
image: nginx:1.20
- name: override-high-availability
type: override
properties:
components:
- type: webservice
traits:
- type: scaler
properties:
replicas: 3
workflow:
steps:
- type: deploy
name: deploy-local
properties:
policies: ["topology-local"]
- type: deploy
name: deploy-hangzhou
properties:
policies: ["topology-hangzhou-clusters", "override-nginx-legacy-image", "override-high-availability"]
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: advance-override
namespace: examples
spec:
components:
- name: nginx-advance-override-legacy
type: webservice
properties:
image: nginx:1.20
- name: nginx-advance-override-latest
type: webservice
properties:
image: nginx
policies:
- name: topology-hangzhou-clusters
type: topology
properties:
clusterLabelSelector:
region: hangzhou
- name: topology-local
type: topology
properties:
clusters: ["local"]
namespace: examples-alternative
- name: override-nginx-legacy
type: override
properties:
selector: ["nginx-advance-override-legacy"]
- name: override-nginx-latest
type: override
properties:
selector: ["nginx-advance-override-latest", "nginx-advance-override-stable"]
components:
- name: nginx-advance-override-stable
type: webservice
properties:
image: nginx:stable
workflow:
steps:
- type: deploy
name: deploy-local
properties:
policies: ["topology-local", "override-nginx-legacy"]
- type: deploy
name: deploy-hangzhou
properties:
policies: ["topology-hangzhou-clusters", "override-nginx-latest"]
topology
简介
描述组件应该部署到的环境。
参数
| 参数名 | 类型 | 说明 |
|---|---|---|
| clusters | []string | 要选择的集群的名称。 |
| clusterLabelSelector | mpa[string]string | 集群的标签选择器。 |
| namespace | string | 要在选定集群中部署的目标命名空间。 如果未设置，组件将继承原始命名空间。 |
示例
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: basic-topology
namespace: examples
spec:
components:
- name: nginx-basic
type: webservice
properties:
image: nginx
policies:
- name: topology-hangzhou-clusters
type: topology
properties:
clusters: ["hangzhou-1", "hangzhou-2"]
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: label-selector-topology
namespace: examples
spec:
components:
- name: nginx-label-selector
type: webservice
properties:
image: nginx
policies:
- name: topology-hangzhou-clusters
type: topology
properties:
clusterLabelSelector:
region: hangzhou
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: local-ns-topology
namespace: examples
spec:
components:
- name: nginx-local-ns
type: webservice
properties:
image: nginx
policies:
- name: topology-local
type: topology
properties:
clusters: ["local"]
namespace: examples-alternative