【kn】Knative快捷命令Kn简介

简介：kn是Knative命令行操作客户机。通过Kn可以轻松操作与Knative相关的资源。

安装Kn

相应的Kn二进制文件可以通过公式获得

Mac OS

Linux

Windows

Kn使用config文件，如kubectl。默认值为$HOME/。kube/config

服务管理

使用Kn命令执行list、create、delete、apply和update操作Knative services。

创建服务

使用Create命令：

Kn service create

例如：

$ kn service create hello world-go-env target=k native-image regi

yuncs . com/k native-sample/hello world-go :73 fbdd 56

creating service ' hello world-go ' in namespace ' default ' :

0.116s the route is still working to reflect the latest desired specification .

0.216s configuration ' hello world-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 ' hello world-go ' created to latest revision ' hello world-go-pyqz-1 ' is available at URL :

使用Apply命令：

Kn service apply

例如：

# create an initial service with using ' kn service apply '，if the service has not

# been already created

Knservice apply s0-image regi

# apply the service again which is a no-operation if none of the options changed

Knservice apply s0-image regi

# 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 s 0-image regi-env target=k native

# read the service declaration from a file

Knservice apply s0-filename my-查看服务

查询服务列表示例：

Kn service list

name URL latest age conditions ready reason

hello world-go hello world-go-pyqz-1 55s 3 ok/3 true查询服务详细资料范例：

Kn service describe helloworld-go

Name: helloworld-go

Namespace: default

Age: 14m米

URL:

Revisions:

100% @ latest(hello world-go-cvclp-2)[2](9m)

Image: regi (pinned to 032b80)

Conditions:

OK TYPE AGE REASON

雷迪9m

ConfigurationsReady 9m

以RoutesReady 9m或YAML显示详细信息：

$ kn service describe hello world-go-o YAML

Api版本3360

Kind :服务

元数据：

Annotations:

: 1041208914252405-1606806762 : 1041208914252405-1606806762 creationTimestamp: "2020-12-09T06:07:41Z" generation: 2 name: helloworld-go namespace: default resourceVersion: "39555635" selfLink: /apis//namespaces/default/services/helloworld-go uid: 763e8214-7c2d-476c-bd88-40b32a30597d spec: template: metadata: annotations: client.knative.dev/user-image: regi creationTimestamp: null name: helloworld-go-cvclp-2 spec: containerConcurrency: 0 containers: - env: - name: TARGET value: knative image: regi name: user-container readinessProbe: successThreshold: 1 tcpSocket: port: 0 resources: {} timeoutSeconds: 300 traffic: - latestRevision: true percent: 100 status: address: url: 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:

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 regi Updating 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:

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 regi --env TARGET=knative

删除服务

示例：

kn service delete helloworld-go

版本管理

查看版本

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

查看版本详情

$ kn revision describe helloworld-go-cvclp-2 Name: helloworld-go-cvclp-2 Namespace: default Age: 3m Image: regi (pinned to 032b80) Env: TARGET=knative Service: helloworld-go Conditions: OK TYPE AGE REASON ++ Ready 3m ++ ContainerHealthy 3m ++ ResourcesAvailable 3m I Active 2m NoTraffic

删除版本

$ kn revision delete helloworld-go-pyqqz-1 Revision '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

作者：元毅

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