Knative快捷操作命令Kn 怎么用

今天就跟大家聊聊有关Knative快捷操作命令Kn 怎么用，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。

kn 是 Knative 命令行操作客户端。 通过 kn 可以方便的操作Knative 相关的资源。

安装 Kn

可以通过官方获取对应的 Kn 二进制

• macOS

• Linux

• Windows

kn 会与 kubectl 使用同样的config 文件，默认使用 $HOME/.kube/config

服务管理

使用 Kn 命令可以执行： list, create, delete, apply, 和 update 操作Knative services.

创建服务

使用 create 命令:
kn service create
示例：

$ kn service create helloworld-go --env TARGET=knative --image registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:73fbdd56yuncs.com/knative-sample/helloworld-go:73fbdd56Creating service 'helloworld-go' in namespace 'default':  0.116s The Route is still working to reflect the latest desired specification.  0.216s Configuration "helloworld-go" is waiting for a Revision to become ready.  3.075s ...  3.149s Ingress has not yet been reconciled.  3.299s ...  3.762s Ready to serve.Service 'helloworld-go' created to latest revision 'helloworld-go-pyqqz-1' is available at URL:http://helloworld-go.default.example.com

使用 apply 命令：
kn service apply
示例：

# Create an initial service with using 'kn service apply', if the service has not# been already createdkn service apply s0 --image registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:73fbdd56# Apply the service again which is a no-operation if none of the options changedkn service apply s0 --image registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:73fbdd56# Add an environment variable to your service. Note, that you have to always fully# specify all parameters (in contrast to 'kn service update')kn service apply s0 --image registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:73fbdd56 --env TARGET=knative# Read the service declaration from a filekn service apply s0 --filename my-svc.yml

查看服务

查询服务列表示例：

kn service listNAME            URL                                        LATEST                  AGE   CONDITIONS   READY   REASONhelloworld-go   http://helloworld-go.default.example.com   helloworld-go-pyqqz-1   55s   3 OK / 3     True

查询服务详情示例：

kn service describe helloworld-goName:       helloworld-goNamespace:  defaultAge:        14mURL:        http://helloworld-go.default.example.comRevisions:  100%  @latest (helloworld-go-cvclp-2) [2](9m)        Image:  registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8 (pinned to 032b80)Conditions:  OK TYPE                   AGE REASON  ++ Ready                   9m  ++ ConfigurationsReady     9m  ++ RoutesReady             9m

或者以 yaml 方式展示详情：

$ kn service describe helloworld-go -oyamlapiVersion: serving.knative.dev/v1kind: Servicemetadata:  annotations:    serving.knative.dev/creator: 1041208914252405-1606806762    serving.knative.dev/lastModifier: 1041208914252405-1606806762  creationTimestamp: "2020-12-09T06:07:41Z"  generation: 2  name: helloworld-go  namespace: default  resourceVersion: "39555635"  selfLink: /apis/serving.knative.dev/v1/namespaces/default/services/helloworld-go  uid: 763e8214-7c2d-476c-bd88-40b32a30597dspec:  template:    metadata:      annotations:        client.knative.dev/user-image: registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8      creationTimestamp: null      name: helloworld-go-cvclp-2    spec:      containerConcurrency: 0      containers:      - env:        - name: TARGET          value: knative        image: registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8        name: user-container        readinessProbe:          successThreshold: 1          tcpSocket:            port: 0        resources: {}      timeoutSeconds: 300  traffic:  - latestRevision: true    percent: 100status:  address:    url: http://helloworld-go.default.svc.cluster.local  conditions:  - lastTransitionTime: "2020-12-09T06:13:33Z"    status: "True"    type: ConfigurationsReady  - lastTransitionTime: "2020-12-09T06:13:34Z"    status: "True"    type: Ready  - lastTransitionTime: "2020-12-09T06:13:34Z"    status: "True"    type: RoutesReady  latestCreatedRevisionName: helloworld-go-cvclp-2  latestReadyRevisionName: helloworld-go-cvclp-2  observedGeneration: 2  traffic:  - latestRevision: true    percent: 100    revisionName: helloworld-go-cvclp-2  url: http://helloworld-go.default.example.com

更新服务（创建新版本）

使用 update 命令：
kn service update NAME
示例：

$ kn service update helloworld-go --image registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8Updating Service 'helloworld-go' in namespace 'default':  3.609s Traffic is not yet migrated to the latest revision.  3.631s Ingress has not yet been reconciled.  4.066s Ready to serve.Service 'helloworld-go' updated to latest revision 'helloworld-go-cvclp-2' is available at URL:http://helloworld-go.default.example.com

使用 apply 也可进行更新服务

kn service apply# Add an environment variable to your service. Note, that you have to always fully# specify all parameters (in contrast to 'kn service update')kn service apply s0 --image registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8 --env TARGET=knative

删除服务

示例：

kn service delete helloworld-go

版本管理

查看版本

kn revision listNAME                    SERVICE         TRAFFIC   TAGS   GENERATION   AGE     CONDITIONS   READY     REASONhelloworld-go-cvclp-2   helloworld-go   100%             2            40s     4 OK / 4     Truehelloworld-go-pyqqz-1   helloworld-go                    1            6m29s   3 OK / 4     True

查看版本详情

$ kn revision describe helloworld-go-cvclp-2Name:       helloworld-go-cvclp-2Namespace:  defaultAge:        3mImage:      registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8 (pinned to 032b80)Env:        TARGET=knativeService:    helloworld-goConditions:  OK TYPE                  AGE REASON  ++ Ready                  3m  ++ ContainerHealthy       3m  ++ ResourcesAvailable     3m   I Active                 2m NoTraffic

删除版本

$ kn revision delete helloworld-go-pyqqz-1Revision 'helloworld-go-pyqqz-1' deleted in namespace 'default'.

其它

除了上面介绍的 service、revision。 Kn 还支持如下的资源操作, 有兴趣的可以自己试用一下。

• kn broker - 管理事件 brokers

• kn channel - 管理事件 channels

• kn route - 管理服务路由 routes

• kn source - 管理事件源 sources

• kn trigger - 管理事件 triggers

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