Knative 安装与使用

Refer

Require

kubernetes 集群
安装 istio
安装 knative
kubectl
helm（可选）

Overview

Knative 的安装是可配置的，包括多种可选项，可参考 Performing a Custom Knative Installation.我们选择全部安装。

我们首先需要一个 kubernetes 集群。使用前几篇搭建的 Rancher 管理的集群

然后安装 istio
之后安装 Knative
最后实践使用

Istio

istio 安装我们可以使用 kubectl 或者使用 rancher 自带的一键安装。我们选择 rancher。

1. rancher

一键启用

等待片刻即启用。

为 default 命名空间开启自动注入

2. kubectl

refer：安装 knative 来自 servicemesher 组织
refer：official guide 来自官网

Verify

查看您的Istio安装状态，以确保安装成功。直到所有pod都显示 Running 或 Completed 的状态：

kubectl get pods --namespace istio-system

Knative

Prequire

knative 安装比较困难，由于网络原因，这里有两个脚本可以运行，具体看文档

Here is yuque doc card, click on the link to view:https://www.yuque.com/abser/blog/knative

文档中有我的 GitHub 链接，可以直接使用该 GitHub 链接下的三个 yaml 文件也能安装。（已经将 gcr.io 中的 image 替换到 docker Hub 中我的账号下）0.11.0 版本已验证，可以在 image.tmp 文件中查看被替换的镜像。

建议使用我这个库，安装和使用都用的这里的 yaml。

Install Knative

在有这三个 yaml 文件的地方执行该命令

kubectl apply --selector knative.dev/crd-install=true -f monitoring.yaml -f release.yaml -f serving.yaml

ArideMacBook-Air:knative abser$ kubectl apply --selector knative.dev/crd-install=true -f monitoring.yaml -f release.yaml -f serving.yaml 
customresourcedefinition.apiextensions.k8s.io/apiserversources.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/brokers.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/channels.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/containersources.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/cronjobsources.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/eventtypes.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/parallels.flows.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/sequences.flows.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/parallels.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/sequences.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/sinkbindings.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/subscriptions.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/triggers.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/inmemorychannels.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/certificates.networking.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/configurations.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/images.caching.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/ingresses.networking.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/metrics.autoscaling.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/podautoscalers.autoscaling.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/revisions.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/routes.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/services.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/serverlessservices.networking.internal.knative.dev unchanged

然后不带 selector 参数再执行一遍

kubectl apply -f monitoring.yaml -f release.yaml -f serving.yaml

ArideMacBook-Air:knative abser$ kubectl apply -f monitoring.yaml -f release.yaml -f serving.yaml 
namespace/knative-monitoring created
service/elasticsearch-logging created
serviceaccount/elasticsearch-logging created
clusterrole.rbac.authorization.k8s.io/elasticsearch-logging created
clusterrolebinding.rbac.authorization.k8s.io/elasticsearch-logging created
statefulset.apps/elasticsearch-logging created
service/kibana-logging created
deployment.apps/kibana-logging created
configmap/fluentd-ds-config created
serviceaccount/fluentd-ds created
clusterrole.rbac.authorization.k8s.io/fluentd-ds created
clusterrolebinding.rbac.authorization.k8s.io/fluentd-ds created
service/fluentd-ds created
daemonset.apps/fluentd-ds created
serviceaccount/kube-state-metrics created
role.rbac.authorization.k8s.io/kube-state-metrics-resizer created
rolebinding.rbac.authorization.k8s.io/kube-state-metrics created
clusterrole.rbac.authorization.k8s.io/kube-state-metrics created
clusterrolebinding.rbac.authorization.k8s.io/kube-state-metrics created
deployment.apps/kube-state-metrics created
service/kube-state-metrics created
configmap/grafana-dashboard-definition-kubernetes-deployment created
configmap/grafana-dashboard-definition-kubernetes-capacity-planning created
configmap/grafana-dashboard-definition-kubernetes-cluster-health created
configmap/grafana-dashboard-definition-kubernetes-cluster-status created
configmap/grafana-dashboard-definition-kubernetes-control-plane-status created
configmap/grafana-dashboard-definition-kubernetes-resource-requests created
configmap/grafana-dashboard-definition-kubernetes-nodes created
configmap/grafana-dashboard-definition-kubernetes-pods created
configmap/grafana-dashboard-definition-kubernetes-statefulset created
serviceaccount/node-exporter created
clusterrole.rbac.authorization.k8s.io/node-exporter created
clusterrolebinding.rbac.authorization.k8s.io/node-exporter created
daemonset.apps/node-exporter created
service/node-exporter created
configmap/grafana-custom-config created
configmap/grafana-dashboard-definition-knative-efficiency created
configmap/grafana-dashboard-definition-knative-reconciler created
configmap/scaling-config created
configmap/grafana-dashboard-definition-knative created
configmap/grafana-datasources created
configmap/grafana-dashboards created
service/grafana created
deployment.apps/grafana created
configmap/prometheus-scrape-config created
service/kube-controller-manager created
service/prometheus-system-discovery created
serviceaccount/prometheus-system created
role.rbac.authorization.k8s.io/prometheus-system created
role.rbac.authorization.k8s.io/prometheus-system created
role.rbac.authorization.k8s.io/prometheus-system created
role.rbac.authorization.k8s.io/prometheus-system created
clusterrole.rbac.authorization.k8s.io/prometheus-system created
rolebinding.rbac.authorization.k8s.io/prometheus-system created
rolebinding.rbac.authorization.k8s.io/prometheus-system created
rolebinding.rbac.authorization.k8s.io/prometheus-system created
rolebinding.rbac.authorization.k8s.io/prometheus-system created
clusterrolebinding.rbac.authorization.k8s.io/prometheus-system created
service/prometheus-system-np created
statefulset.apps/prometheus-system created
service/zipkin created
deployment.apps/zipkin created
namespace/knative-eventing created
clusterrole.rbac.authorization.k8s.io/addressable-resolver created
clusterrole.rbac.authorization.k8s.io/service-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/serving-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/channel-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/broker-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/messaging-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/flows-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/eventing-broker-filter created
clusterrole.rbac.authorization.k8s.io/eventing-broker-ingress created
clusterrole.rbac.authorization.k8s.io/eventing-config-reader created
clusterrole.rbac.authorization.k8s.io/channelable-manipulator created
clusterrole.rbac.authorization.k8s.io/knative-eventing-namespaced-admin created
clusterrole.rbac.authorization.k8s.io/knative-messaging-namespaced-admin created
clusterrole.rbac.authorization.k8s.io/knative-eventing-sources-namespaced-admin created
clusterrole.rbac.authorization.k8s.io/knative-eventing-namespaced-edit created
clusterrole.rbac.authorization.k8s.io/knative-eventing-namespaced-view created
clusterrole.rbac.authorization.k8s.io/knative-eventing-controller created
clusterrole.rbac.authorization.k8s.io/podspecable-binding created
clusterrole.rbac.authorization.k8s.io/builtin-podspecable-binding created
serviceaccount/eventing-controller created
serviceaccount/eventing-webhook created
serviceaccount/eventing-source-controller created
clusterrole.rbac.authorization.k8s.io/source-observer created
clusterrole.rbac.authorization.k8s.io/eventing-sources-source-observer created
clusterrole.rbac.authorization.k8s.io/knative-eventing-source-controller created
clusterrole.rbac.authorization.k8s.io/knative-eventing-webhook created
clusterrolebinding.rbac.authorization.k8s.io/eventing-controller created
clusterrolebinding.rbac.authorization.k8s.io/eventing-controller-resolver created
clusterrolebinding.rbac.authorization.k8s.io/eventing-controller-source-observer created
clusterrolebinding.rbac.authorization.k8s.io/eventing-controller-manipulator created
clusterrolebinding.rbac.authorization.k8s.io/eventing-webhook created
clusterrolebinding.rbac.authorization.k8s.io/eventing-source-controller created
clusterrolebinding.rbac.authorization.k8s.io/eventing-source-controller-resolver created
clusterrolebinding.rbac.authorization.k8s.io/eventing-webhook-resolver created
clusterrolebinding.rbac.authorization.k8s.io/eventing-webhook-podspecable-binding created
customresourcedefinition.apiextensions.k8s.io/apiserversources.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/brokers.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/channels.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/containersources.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/cronjobsources.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/eventtypes.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/parallels.flows.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/sequences.flows.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/parallels.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/sequences.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/sinkbindings.sources.eventing.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/subscriptions.messaging.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/triggers.eventing.knative.dev unchanged
configmap/default-ch-webhook created
service/eventing-webhook created
deployment.apps/eventing-controller created
deployment.apps/sources-controller created
mutatingwebhookconfiguration.admissionregistration.k8s.io/webhook.eventing.knative.dev created
validatingwebhookconfiguration.admissionregistration.k8s.io/validation.webhook.eventing.knative.dev created
validatingwebhookconfiguration.admissionregistration.k8s.io/config.webhook.eventing.knative.dev created
mutatingwebhookconfiguration.admissionregistration.k8s.io/sinkbindings.webhook.sources.knative.dev created
secret/eventing-webhook-certs created
deployment.apps/eventing-webhook created
configmap/config-logging created
configmap/config-observability created
configmap/config-tracing created
clusterrole.rbac.authorization.k8s.io/imc-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/imc-channelable-manipulator created
clusterrole.rbac.authorization.k8s.io/imc-controller created
clusterrole.rbac.authorization.k8s.io/imc-dispatcher created
service/imc-dispatcher created
serviceaccount/imc-controller created
serviceaccount/imc-dispatcher created
clusterrolebinding.rbac.authorization.k8s.io/imc-controller created
clusterrolebinding.rbac.authorization.k8s.io/imc-dispatcher created
customresourcedefinition.apiextensions.k8s.io/inmemorychannels.messaging.knative.dev unchanged
deployment.apps/imc-controller created
deployment.apps/imc-dispatcher created
namespace/knative-serving created
clusterrole.rbac.authorization.k8s.io/knative-serving-addressable-resolver created
clusterrole.rbac.authorization.k8s.io/custom-metrics-server-resources created
clusterrole.rbac.authorization.k8s.io/knative-serving-namespaced-admin created
clusterrole.rbac.authorization.k8s.io/knative-serving-namespaced-edit created
clusterrole.rbac.authorization.k8s.io/knative-serving-namespaced-view created
clusterrole.rbac.authorization.k8s.io/knative-serving-admin created
clusterrole.rbac.authorization.k8s.io/knative-serving-core created
clusterrole.rbac.authorization.k8s.io/knative-serving-podspecable-binding created
serviceaccount/controller created
clusterrolebinding.rbac.authorization.k8s.io/custom-metrics:system:auth-delegator created
clusterrolebinding.rbac.authorization.k8s.io/hpa-controller-custom-metrics created
clusterrolebinding.rbac.authorization.k8s.io/knative-serving-controller-admin created
rolebinding.rbac.authorization.k8s.io/custom-metrics-auth-reader created
customresourcedefinition.apiextensions.k8s.io/certificates.networking.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/configurations.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/images.caching.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/ingresses.networking.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/metrics.autoscaling.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/podautoscalers.autoscaling.internal.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/revisions.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/routes.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/services.serving.knative.dev unchanged
customresourcedefinition.apiextensions.k8s.io/serverlessservices.networking.internal.knative.dev unchanged
service/activator-service created
service/controller created
service/webhook created
mutatingwebhookconfiguration.admissionregistration.k8s.io/webhook.serving.knative.dev created
validatingwebhookconfiguration.admissionregistration.k8s.io/validation.webhook.serving.knative.dev created
validatingwebhookconfiguration.admissionregistration.k8s.io/config.webhook.serving.knative.dev created
secret/webhook-certs created
image.caching.internal.knative.dev/queue-proxy created
deployment.apps/activator created
horizontalpodautoscaler.autoscaling/activator created
deployment.apps/autoscaler-hpa created
service/autoscaler created
deployment.apps/autoscaler created
configmap/config-autoscaler created
configmap/config-defaults created
configmap/config-deployment created
configmap/config-domain created
configmap/config-gc created
configmap/config-logging created
configmap/config-network created
configmap/config-observability created
configmap/config-tracing created
deployment.apps/controller created
apiservice.apiregistration.k8s.io/v1beta1.custom.metrics.k8s.io created
deployment.apps/webhook created
clusterrole.rbac.authorization.k8s.io/knative-serving-istio created
gateway.networking.istio.io/knative-ingress-gateway created
gateway.networking.istio.io/cluster-local-gateway created
configmap/config-istio created
deployment.apps/networking-istio created

检查各 pod 状态，直到都是 Running 或 Completed 的状态

kubectl get pods --namespace knative-serving
kubectl get pods --namespace knative-eventing
kubectl get pods --namespace knative-monitoring

Rancher

我们看看 rancher 中的状态

添加项目

添加一个 Knative 的项目管理命名空间，并把三个命名空间加入该项目

查看情况

在 Rancher 中查看各 pod 的情况

Usage

refer：Install knative app

knative 使用很简单，一个 yaml 文件的 apply 就能搞定大部分情况，因为可以使用 istio 对这些部署的应用调整路由和流量。

Prequire

我已经将 helloworld-go 的 docker image 上传到我的账户下，直接使用我的 yaml 文件即可应用。

yaml 文件内容

内容如下：

apiVersion: serving.knative.dev/v1 # Current version of Knative
kind: Service
metadata:
  name: helloworld-go # The name of the app
  namespace: default # The namespace the app will use
spec:
  template:
    spec:
      containers:
        - image: yhyddr/helloworld-go # The URL to the image of the app
          env:
            - name: TARGET # The environment variable printed out by the sample app
              value: "Go Sample v1"

你也可以把它保存为 yaml 文件。

Apply

安装

命令：kubectl apply -f service.yaml

ArideMacBook-Air:knative abser$ kubectl apply -f service.yaml 
service.serving.knative.dev/helloworld-go created

检查

使用 kubectl get ksvc helloworld-go 查看服务状态

ArideMacBook-Air:knative abser$ kubectl get ksvc helloworld-go 
NAME            URL                                        LATESTCREATED         LATESTREADY   READY     REASON
helloworld-go   http://helloworld-go.default.example.com   helloworld-go-ss4tb                 Unknown   RevisionMissing

Use

检查

1.直到服务 ready 为 True 时，访问提供的 URL 即可。

ArideMacBook-Air:knative abser$ kubectl get ksvc helloworld-go 
NAME            URL                                        LATESTCREATED         LATESTREADY           READY   REASON
helloworld-go   http://helloworld-go.default.example.com   helloworld-go-xz75h   helloworld-go-xz75h   True   

ArideMacBook-Air:knative abser$ curl http://helloworld-go.default.example.com 
curl: (6) Could not resolve host: helloworld-go.default.example.com

发现访问不成功，这是无法解析的 URL 的原因，我们需要访问 istio 的 ingressgateway 才行。

使用 Gateway

查看 ingressgateway 的 IP 地址，如果您的机器有外网 IP ，意味着你的 Knative 可以对外服务，更多参考 external ip

ArideMacBook-Air:knative abser$ kubectl get svc istio-ingressgateway --namespace istio-system
NAME                   TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)                      AGE
istio-ingressgateway   NodePort   10.43.243.67   <none>        80:31380/TCP,443:31390/TCP   26h

无 Load Balancer

使用命令将 ingressgateway 的 IP 记录下来。

KNATIVE_INGRESS=$(kubectl get node --output 'jsonpath={.items[0].status.addresses[0].address}'):$(kubectl get svc istio-ingressgateway --namespace=istio-system --output 'jsonpath={.spec.ports[?(@.port==80)].nodePort}')

ArideMacBook-Air:knative abser$ export KNATIVE_INGRESS=$(kubectl get node  --output 'jsonpath={.items[0].status.addresses[0].address}'):$(kubectl get svc istio-ingressgateway  --namespace=istio-system --output 'jsonpath={.spec.ports[?(@.port==80)].nodePort}')

ArideMacBook-Air:knative abser$ echo $KNATIVE_INGRESS
192.168.0.103:31380

这里是因为我使用的 k8s（比如： Minikube）无外部负载均衡器 Load Balancer，所以 gateway 是 NodePort 模式，故 IP 是 192.168.0.103:31380

有 Load Balancer

$ export KNATIVE_INGRESS=$(kubectl get svc istio-ingressgateway --namespace istio-system --output 'jsonpath={.status.loadBalancer.ingress[0].ip}')

$ echo $KNATIVE_INGRESS
35.203.155.229

执行

访问成功

curl -H "Host: helloworld-go.default.example.com" http://$KNATIVE_INGRESS
Hello World: Go Sample v1!

来源： Knative 安装与使用 · 语雀

Knative 安装与使用 · 语雀

Knative 安装与使用

Refer

Require

Overview

Istio

1. rancher

2. kubectl

Verify

Knative

Prequire

Install Knative

Rancher

添加项目

查看情况

Usage

Prequire

yaml 文件内容

Apply

安装

检查

Use

检查

使用 Gateway

无 Load Balancer

有 Load Balancer

执行

IPFS 上 Kubernetes · 语雀

发表评论取消回复

Knative 安装与使用

Refer

Require

Overview

Istio

1. rancher

2. kubectl

Verify

Knative

Prequire

Install Knative

Rancher

添加项目

查看情况

Usage

Prequire

yaml 文件内容

Apply

安装

检查

Use

检查

使用 Gateway

无 Load Balancer

有 Load Balancer

执行

IPFS 上 Kubernetes · 语雀

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