版本管理
组件版本
你可以通过字段 spec.components[*].externalRevision
在 Application 中指定即将生成的组件实例版本名称。
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: myapp
spec:
components:
- name: express-server
type: webservice
externalRevision: express-server-v1
properties:
image: stefanprodan/podinfo:4.0.3
如果没有主动指定版本名称,会根据规则 <component-name>-<revision-number>
自动生成。
应用创建以后,你就可以看到系统中生成了 ControllerRevision 对象来记录组件版本。
- 获取组件实例的版本记录
$ kubectl get controllerrevision -l controller.oam.dev/component=express-server
NAME CONTROLLER REVISION AGE
express-server-v1 application.core.oam.dev/myapp 1 2m40s
express-server-v2 application.core.oam.dev/myapp 2 2m12s
你可以在灰度发布功能中进一步利用组件实例版本化以后的功能。
应用版本
除了工作流字段,应用中的每个字段更新都会生成一个对应的版本快照。
- 查看版本快照
$ kubectl get apprev -l app.oam.dev/name=myapp
NAME AGE
myapp-v1 54m
myapp-v2 53m
myapp-v3 18s
你可以在版本快照中获得应用所关联的所有信息,包括应用的字段以及对应的组件类型、运维能力等。
apiVersion: core.oam.dev/v1beta1
kind: ApplicationRevision
metadata:
labels:
app.oam.dev/app-revision-hash: a74b4a514ba2fc08
app.oam.dev/name: myapp
name: myapp-v3
namespace: default
...
spec:
application:
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: myapp
namespace: default
...
spec:
components:
- name: express-server
properties:
image: stefanprodan/podinfo:5.0.3
type: webservice@v1
...
componentDefinitions:
webservice:
apiVersion: core.oam.dev/v1beta1
kind: ComponentDefinition
metadata:
name: webservice
namespace: vela-system
...
spec:
schematic:
cue:
...
traitDefinitions:
...
应用版本对比
部署前版本对比(Live-diff)功能可以让你不用真的对运行时集群进行操作,在本地预览即将部署的版本和线上版本的差异性,并进行确认。
预览所提供的信息,会包括应用部署计划的新增、修改和移除等信息,同时也包括其中的组件和运维特征的相关信息。
假设你的新应用部署计划如下,包含镜像的变化:
# new-app.yaml
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: myapp
spec:
components:
- name: express-server
type: webservice@v1
properties:
image: crccheck/hello-world # 变更镜像
然后运行 版本对比
功能,使用如下命令:
vela live-diff -f new-app.yaml -r vela-app-v1
- 通过
-r
或--revision
参数,指定要比较的版本名称。 - 通过
-c
或--context
指定对比差异的上下文行数。
通过 vela live-diff -h
查看更多参数用法。
点击查看对比结果
---
# Application (myapp) has been modified(*)
---
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
- annotations:
- kubectl.kubernetes.io/last-applied-configuration: |
- {"apiVersion":"core.oam.dev/v1beta1","kind":"Application","metadata":{"annotations":{},"name":"myapp","namespace":"default"},"spec":{"components":[{"externalRevision":"express-server-v1","name":"express-server","properties":{"image":"stefanprodan/podinfo:4.0.3"},"type":"webservice"}]}}
creationTimestamp: null
- finalizers:
- - app.oam.dev/resource-tracker-finalizer
name: myapp
namespace: default
spec:
components:
- - externalRevision: express-server-v1
- name: express-server
+ - name: express-server
properties:
- image: stefanprodan/podinfo:4.0.3
- type: webservice
+ image: crccheck/hello-world
+ type: webservice@v1
status:
rollout:
batchRollingState: ""
currentBatch: 0
lastTargetAppRevision: ""
rollingState: ""
upgradedReadyReplicas: 0
upgradedReplicas: 0
---
## Component (express-server) has been modified(*)
---
apiVersion: apps/v1
kind: Deployment
metadata:
- annotations:
- kubectl.kubernetes.io/last-applied-configuration: |
- {"apiVersion":"core.oam.dev/v1beta1","kind":"Application","metadata":{"annotations":{},"name":"myapp","namespace":"default"},"spec":{"components":[{"externalRevision":"express-server-v1","name":"express-server","properties":{"image":"stefanprodan/podinfo:4.0.3"},"type":"webservice"}]}}
+ annotations: {}
labels:
app.oam.dev/appRevision: ""
app.oam.dev/component: express-server
app.oam.dev/name: myapp
app.oam.dev/resourceType: WORKLOAD
- workload.oam.dev/type: webservice
+ workload.oam.dev/type: webservice-v1
name: express-server
namespace: default
spec:
selector:
matchLabels:
app.oam.dev/component: express-server
template:
metadata:
labels:
app.oam.dev/component: express-server
app.oam.dev/revision: KUBEVELA_COMPONENT_REVISION_PLACEHOLDER
spec:
containers:
- - image: stefanprodan/podinfo:4.0.3
+ - image: crccheck/hello-world
name: express-server
ports:
- containerPort: 80
VelaUI 中独立在数据库中记录了应用版本,我们也推荐在数据库中记录元数据历史。