在云原生趋势下,容器和 Kubernetes 可谓是家喻户晓,许多企业内部的研发团队都在使用 Kubernetes 打造 DevOps 平台。从最早的容器概念到 Kubernetes 再到 DevOps/GitOps 整个技术链非常庞大,Kubernetes 的优势也显而易见 可移动 可扩展 自修复 等,但有一个劣势点就是技术门槛太高,对于开发者来说单单一个 Kubernetes 就够我们学习一段时间了。

通常我们在 Kubernetes 中部署应用需要用 Dockerfile 将业务打成镜像,然后编写 Kubernetes 的 Yaml 部署应用,再结合 Jenkins 的 Pipeline 实现 CI/CD。对于不懂容器的开发者来说,要学习 Dockerfile 语法、K8s Yaml 语法、 Jenkins Pipeline 语法,学习成本有点高。”我还要 Coding 呢!”

本文将分别介绍 如何在 Kubernetes 中部署应用 和 如何在 Rainbond 中部署应用。

在 Kubernetes 中部署应用

在 Kubernetes 中部署一个 Nginx 并通过 NodePort 访问和通过 Ingress 访问。

  1. 创建 nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
  name: nginx-deployment
    app: nginx
  replicas: 3
      app: nginx
        app: nginx
      - name: nginx
        image: nginx:latest
        - containerPort: 80
  1. 创建 nginx-service.yaml,并设置 Service 类型为 NodePort
apiVersion: v1
kind: Service
  name: nginx-service
  type: NodePort
    app: nginx
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 30080
  1. 创建 Nginx Deployment 和 Nginx Service
$ kubectl apply -f nginx-deployment.yaml
$ kubectl apply -f nginx-service.yaml
  1. 创建 Ingress 策略
apiVersion: networking.k8s.io/v1
kind: Ingress
  name: nginx-ingress
    nginx.ingress.kubernetes.io/rewrite-target: /
  ingressClassName: nginx-example
  - http:
      - path: /
        pathType: Prefix
            name: nginx-service
              number: 80
kubectl apply -f nginx-ingress.yaml

以上就是在 Kubernetes 中部署一个 Nginx 并开启 Nodeport 访问和 Ingress 访问的简单示例,这个过程需要理解 K8s 的资源类型 Deployment Service Ingress,以及资源类型之间如何绑定的等等。这仅仅是冰山一角,对于复杂的业务需要写多个这样的 Yaml 以及理清楚业务之间的依赖关系等。

在 Rainbond 中部署应用

Rainbond 是建立在 Kubernetes 之上的云原生应用管理平台,遵循以应用为中心的概念,其目的就是为了让用户不在编写复杂的 Yaml 文件就能轻松的将自己的业务部署在 Kubernetes 中。

通过一条命令安装 Rainbond Allinone

这里同样也是部署一个 Nginx 并通过 NodePort 访问和通过 Ingress 访问。

  1. 部署 Nginx 应用,在 Rainbond 团队视图内 -> 选择基于镜像创建组件 -> 镜像地址选择 nginx:latest 创建即可。
  1. 开启 Ingress 访问,在 Nginx 组件内 -> 端口 -> 打开对外服务,默认会生成可访问的域名。
  1. 开启 Nodeport 访问,在 应用视图内 -> 网关 -> TCP/UDP -> 添加策略一键绑定 TCP 访问策略。

这里有几个 Rainbond 的概念:

「组件:」 组件对应 K8s 中的控制器,比如 Deployment、Statefulset 等。

「应用:」 应用是由多个组件组成的应用,通过一套微服务包含多个组件称之为一个应用。

「网关:」 网关是 Rainbond 对外访问的入口,域名、Tcp访问都是通过网关生成的访问策略。


「团队:」 Rainbond的团队意义上是分配给部门使用的,比如开发部门、测试部门,实际底层上团队对应的是 K8s NameSpace。


在 Kubernetes 中部署应用需要我们大量学习容器、Kubernetes的概念以及 Yaml 语法等等。而在 Rainbond 上部署应用只需要在 UI 界面上点点即可完成部署,这对不懂 K8s 和容器的同学们很友好,可以快速部署自己的业务。


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