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。
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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。
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
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:73fbdd56 yuncs.com/knative-sample/helloworld-go:73fbdd56 Creating 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 created kn 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 changed kn 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 file kn service apply s0 --filename my-svc.yml
查看服务
查询服务列表示例：
kn service list NAME URL LATEST AGE CONDITIONS READY REASON helloworld-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-go Name: helloworld-go Namespace: default Age: 14m URL: http://helloworld-go.default.example.com Revisions: 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 -oyaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
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-bd88-40b32a30597d
spec:
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: 100
status:
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:160e4dc8 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: 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
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: registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8 (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'.
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
看完上述内容，你们对Knative快捷操作命令Kn 怎么用有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。
