kubernetes实战练习4

kubernetes实战练习4

将service从源代码部署到 Kubernetes

您是一名开发人员，想尝试 Kubernetes 吗？

在本教程中，我们将向您展示从源代码到正在运行的 Kubernetes 集群将服务部署到 Kubernetes 的基础知识。

容器

Kubernetes 不会直接运行您的源代码。相反，您将容器交给 Kubernetes。

容器包含

1源代码的编译版本2运行源代码所需的任何/所有运行时依赖项。

在本教程中，我们将使用 Docker 作为我们的容器格式。我们已经用 Python 创建了一个简单的 Web 应用程序，​​hello-webapp​​​. 要将 ​​webapp​​​ 打包为 Docker 容器，我们创建了一个​​Dockerfile​​.

我们Dockerfile为您创建了一个，因此只需键入以下命令即可查看其内容：

controlplane $ cd hello-webappcontrolplane $ cat Dockerfile# Run serverFROM alpine:3.5RUN apk add --no-cache python py2-pip py2-geventCOPY requirements.txt .RUN pip install -r requirements.txtCOPY . /appWORKDIR /appEXPOSE 8080ENTRYPOINT ["python"]CMD ["app.py"]controlplane $ lsDockerfile README.md deployment.yaml requirements.txt uuid.txtLICENSE app.py k8s service.yamlcontrolplane $ docker build -t hello-webapp:v1 .Sending build context to Docker daemon 135.7kBStep 1/9 : FROM alpine:3.53.5: Pulling from library/alpine8cae0e1ac61c: Already exists Digest: sha256:66952b313e51c3bd1987d7c4ddf5dba9bc0fb6e524eed2448fa660246b3e76ecStatus: Downloaded newer image for alpine:3.5 ---> f80194ae2e0cStep 2/9 : RUN apk add --no-cache python py2-pip py2-gevent ---> Running in 83294f8e9223fetch Installing libbz2 (1.0.6-r5)(2/14) Installing expat (2.2.0-r1)(3/14) Installing libffi (3.2.1-r2)(4/14) Installing gdbm (1.12-r0)(5/14) Installing ncurses-terminfo-base (6.0_p20171125-r1)(6/14) Installing ncurses-terminfo (6.0_p20171125-r1)(7/14) Installing ncurses-libs (6.0_p20171125-r1)(8/14) Installing readline (6.3.008-r4)(9/14) Installing sqlite-libs (3.15.2-r2)(10/14) Installing python2 (2.7.15-r0)(11/14) Installing py2-greenlet (0.4.10-r3)(12/14) Installing py2-gevent (1.1.2-r0)(13/14) Installing py-setuptools (29.0.1-r0)(14/14) Installing py2-pip (9.0.0-r1)Executing busybox-1.25.1-r2.triggerOK: 63 MiB in 25 packagesRemoving intermediate container 83294f8e9223 ---> 4737825cb785Step 3/9 : COPY requirements.txt . ---> 14704e6183c2Step 4/9 : RUN pip install -r requirements.txt ---> Running in 4b4798d29aa9Collecting flask (from -r requirements.txt (line 1)) Downloading (94kB)Collecting requests (from -r requirements.txt (line 2)) Downloading (62kB)Collecting Jinja2<3.0,>=2.10.1 (from flask->-r requirements.txt (line 1)) Downloading (125kB)Collecting Werkzeug<2.0,>=0.15 (from flask->-r requirements.txt (line 1)) Downloading (298kB)Collecting click<8.0,>=5.1 (from flask->-r requirements.txt (line 1)) Downloading (82kB)Collecting itsdangerous<2.0,>=0.24 (from flask->-r requirements.txt (line 1)) Downloading urllib3<1.27,>=1.21.1 (from requests->-r requirements.txt (line 2)) Downloading (138kB)Collecting idna<3,>=2.5; python_version < "3" (from requests->-r requirements.txt (line 2)) Downloading (58kB)Collecting certifi>=2017.4.17 (from requests->-r requirements.txt (line 2)) Downloading (149kB)Collecting chardet<5,>=3.0.2; python_version < "3" (from requests->-r requirements.txt (line 2)) Downloading (178kB)Collecting MarkupSafe>=0.23 (from Jinja2<3.0,>=2.10.1->flask->-r requirements.txt (line 1)) Downloading collected packages: MarkupSafe, Jinja2, Werkzeug, click, itsdangerous, flask, urllib3, idna, certifi, chardet, requests Running setup.py install for MarkupSafe: started Running setup.py install for MarkupSafe: finished with status 'done'Successfully installed Jinja2-2.11.3 MarkupSafe-1.1.1 Werkzeug-1.0.1 certifi-2021.10.8 chardet-4.0.0 click-7.1.2 flask-1.1.4 idna-2.10 itsdangerous-1.1.0 requests-2.26.0 urllib3-1.26.7You are using pip version 9.0.0, however version 21.3.1 is available.You should consider upgrading via the 'pip install --upgrade pip' command.Removing intermediate container 4b4798d29aa9 ---> 99831ef71094Step 5/9 : COPY . /app ---> 2d6006fe0c32Step 6/9 : WORKDIR /app ---> Running in dd5a0ef82c6aRemoving intermediate container dd5a0ef82c6a ---> 2f02dd608139Step 7/9 : EXPOSE 8080 ---> Running in 41dd76e23535Removing intermediate container 41dd76e23535 ---> 5e8a803e2b31Step 8/9 : ENTRYPOINT ["python"] ---> Running in 1445b35d4c4bRemoving intermediate container 1445b35d4c4b ---> 43808464f62fStep 9/9 : CMD ["app.py"] ---> Running in e24f5500e614Removing intermediate container e24f5500e614 ---> 761f1945fd23Successfully built 761f1945fd23Successfully tagged hello-webapp:v1

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