4.6. 部署 Python 应用程序

以下流程为 parksmap 应用程序部署后端服务。Python 应用程序针对 MongoDB 数据库执行 2D geo-spatial 查询，以定位和返回世界上的所有国家公园的信息。

部署的后端服务是 nationalparks。

先决条件

  • 有访问 OpenShift Container Platform 集群的权限。
  • 已安装 OpenShift CLI（oc）。
  • 您已部署了一个镜像。

流程

  1. 要创建新 Python 应用程序，请输入以下命令： 

    $ oc new-app python~https://github.com/openshift-roadshow/nationalparks-py.git --name nationalparks -l 'app=national-parks-app,component=nationalparks,role=backend,app.kubernetes.io/part-of=national-parks-app,app.kubernetes.io/name=python' --allow-missing-images=true

    输出示例

    --> Found image 0406f6c (13 days old) in image stream "openshift/python" under tag "3.9-ubi8" for "python"

    Python 3.9
    ----------
    Python 3.9 available as container is a base platform for building and running various Python 3.9 applications and frameworks. Python is an easy to learn, powerful programming language. It has efficient high-level data structures and a simple but effective approach to object-oriented programming. Python's elegant syntax and dynamic typing, together with its interpreted nature, make it an ideal language for scripting and rapid application development in many areas on most platforms.

    Tags: builder, python, python39, python-39, rh-python39

    * A source build using source code from https://github.com/openshift-roadshow/nationalparks-py.git will be created
      * The resulting image will be pushed to image stream tag "nationalparks:latest"
      * Use 'oc start-build' to trigger a new build

--> Creating resources with label app=national-parks-app,app.kubernetes.io/name=python,app.kubernetes.io/part-of=national-parks-app,component=nationalparks,role=backend ...
    imagestream.image.openshift.io "nationalparks" created
    buildconfig.build.openshift.io "nationalparks" created
    deployment.apps "nationalparks" created
    service "nationalparks" created
--> Success

  2. 要创建公开应用程序 nationalparks 的路由，请使用以下命令： 

    $ oc create route edge nationalparks --service=nationalparks

    输出示例

    route.route.openshift.io/parksmap created

  3. 要检索创建的应用程序路由，请输入以下命令： 

    $ oc get route

    输出示例

    NAME             HOST/PORT                                                           PATH   SERVICES        PORT       TERMINATION   WILDCARD
nationalparks    nationalparks-user-getting-started.apps.cluster.example.com                nationalparks   8080-tcp   edge          None
parksmap         parksmap-user-getting-started.apps.cluster.example.com                     parksmap        8080-tcp   edge          None

其他资源