02-knative-serving部署

发布时间:2023年12月19日
  • 示例环境
    • Kubernetes: v1.27.1
    • Knative: v1.12
    • networking layer: istio
  • 可用的部署方式
    • 基于YAML配置文档直接部署
      • Serving和Eventing需要分别进行部署
    • 借助Knative Operator进行部署
      • 首先部署Knative Operator
      • 通过Operator的KnativeServing部署Serving
      • 通过Operator的KnativeEventing资源部署Eventing
  • 需要部署的Knative组件
    • Serving
    • Eventing
    • kn

1.1 部署serving

  • 环境要求

    • For prototyping purposes
      • 单节点的Kubernetes集群,有2个可用的CPU核心,以及4g内存;
    • For production purposes
      • 单节点的Kubernetes集群,需要至少有6个CPU核心、6G内存和30G磁盘空间
      • 多节点的Kubernetes集群中,每个节点至少有2个CPU核心,4G内存和20G磁盘空间
      • Kubernetes版本最低为v1.26
  • 安装步骤

    • 部署Serving核心组件
    • 部署网络层(networking layer)组件
      • Istio、Contour、Kourier三选一
    • (可选)配置DNS
    • (可选) 部署Serving扩展
      • HPA:用于支持Kubernetes的HPA
      • Cert Manager:用于为工作负载自动签发TLS证书
      • Encrypt HTTP01:用于为工作负载自动签发TLS证书
  • 以YAML文件进行Serving部署

    • 参考官方文档:https://knative.dev/docs/install/yaml-install/serving/install-serving-with-yaml/

    • 部署serving的crd:

      kubectl apply -f https://github.com/knative/serving/releases/download/knative-v1.12.0/serving-crds.yaml
      
    • 部署serving核心组件

      kubectl apply -f https://github.com/knative/serving/releases/download/knative-v1.12.0/serving-core.yaml
      
    • 安装 a networking layer(这里以istio为例)

      kubectl apply -l knative.dev/crd-install=true -f https://github.com/knative/net-istio/releases/download/knative-v1.12.0/istio.yaml
      kubectl apply -f https://github.com/knative/net-istio/releases/download/knative-v1.12.0/istio.yaml
      kubectl apply -f https://github.com/knative/net-istio/releases/download/knative-v1.12.0/net-istio.yaml
      kubectl --namespace istio-system get service istio-ingressgateway
      
    • 配置DNS,因为我们是测试环境,所以选择"no dns",来配置,可以从集群外部访问的域名

      kubectl patch configmap/config-domain \
            --namespace knative-serving \
            --type merge \
            --patch '{"data":{"example.com":""}}'
      
    • 安装HPA控制器

      kubectl apply -f https://github.com/knative/serving/releases/download/knative-v1.12.0/serving-hpa.yaml
      
    • 安装kn

      wget https://github.com/knative/client/releases/download/knative-v1.11.2/kn-linux-amd64
      
      cp kn-linux-amd64 /usr/local/bin/kn
      
      chmod +x /usr/local/bin/kn
      
    • 确认下载成功

      root@k-master01:~# kubectl get pods -n knative-serving
      NAME                                    READY   STATUS    RESTARTS   AGE
      activator-58b9474547-7nnh6              1/1     Running   0          18m
      autoscaler-c88f8c8dc-zfvjv              1/1     Running   0          18m
      autoscaler-hpa-5877fb58d6-84m5j         1/1     Running   0          64s
      controller-84cd85bcc-wg9q8              1/1     Running   0          18m
      net-istio-controller-79f97565f4-dc6m8   1/1     Running   0          2m34s
      net-istio-webhook-f7c89b4fd-jwcqs       1/1     Running   0          2m34s
      webhook-6bbbc5867c-dw7vs                1/1     Running   0          18m
      
      root@k-master01:~# kubectl get pods -n istio-system
      NAME                                    READY   STATUS    RESTARTS   AGE
      istio-ingressgateway-584c594ff8-2f8mg   1/1     Running   0          5m2s
      istio-ingressgateway-584c594ff8-7clr9   1/1     Running   0          5m2s
      istio-ingressgateway-584c594ff8-w7tq5   1/1     Running   0          5m2s
      istiod-78c4f7f756-kv4mh                 1/1     Running   0          5m2s
      istiod-78c4f7f756-kxbjw                 1/1     Running   0          4m47s
      istiod-78c4f7f756-pldrm                 1/1     Running   0          4m47s
      
    • 暴露istio-ingressgateway

      给node01上邦一个ip地址:

      ip addr add 192.168.58.100/24 dev ens33
      
       kubectl edit svc istio-ingressgateway -n istio-system
      

      在这里插入图片描述

  • 运行一个demo的service

    apiVersion: serving.knative.dev/v1
    kind: Service
    metadata:
      name: hello
    spec:
      template:
        metadata:
          # This is the name of our new "Revision," it must follow the convention {service-name}-{revision-name}
          name: hello-world
        spec:
          containers:
            #- image: gcr.io/knative-samples/helloworld-go
            - image: ikubernetes/helloworld-go
              ports:
                - containerPort: 8080
              env:
                - name: TARGET
                  value: "World"
    
    

    测试请求

    kubectl get ksvc
    

    外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

    本机测试:

    curl -H "Host: hello.default.example.com" 192.168.58.100
    
    Hello World!
    
文章来源:https://blog.csdn.net/weixin_38753143/article/details/135068192
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