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-webapp controlplane $ cat Dockerfile # Run server FROM alpine:3.5 RUN apk add --no-cache python py2-pip py2-gevent COPY requirements.txt . RUN pip install -r requirements.txt COPY . /app WORKDIR /app EXPOSE 8080 ENTRYPOINT ["python"] CMD ["app.py"] controlplane $ ls Dockerfile README.md deployment.yaml requirements.txt uuid.txt LICENSE app.py k8s service.yaml controlplane $ docker build -t hello-webapp:v1 . Sending build context to Docker daemon 135.7kB Step 1/9 : FROM alpine:3.5 3.5: Pulling from library/alpine 8cae0e1ac61c: Already exists Digest: sha256:66952b313e51c3bd1987d7c4ddf5dba9bc0fb6e524eed2448fa660246b3e76ec Status: Downloaded newer image for alpine:3.5 ---> f80194ae2e0c Step 2/9 : RUN apk add --no-cache python py2-pip py2-gevent ---> Running in 83294f8e9223 fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/main/x86_64/APKINDEX.tar.gz fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/community/x86_64/APKINDEX.tar.gz (1/14) 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.trigger OK: 63 MiB in 25 packages Removing intermediate container 83294f8e9223 ---> 4737825cb785 Step 3/9 : COPY requirements.txt . ---> 14704e6183c2 Step 4/9 : RUN pip install -r requirements.txt ---> Running in 4b4798d29aa9 Collecting flask (from -r requirements.txt (line 1)) Downloading https://files.pythonhosted.org/packages/e8/6d/994208daa354f68fd89a34a8bafbeaab26fda84e7af1e35bdaed02b667e6/Flask-1.1.4-py2.py3-none-any.whl (94kB) Collecting requests (from -r requirements.txt (line 2)) Downloading https://files.pythonhosted.org/packages/92/96/144f70b972a9c0eabbd4391ef93ccd49d0f2747f4f6a2a2738e99e5adc65/requests-2.26.0-py2.py3-none-any.whl (62kB) Collecting Jinja2<3.0,>=2.10.1 (from flask->-r requirements.txt (line 1)) Downloading https://files.pythonhosted.org/packages/7e/c2/1eece8c95ddbc9b1aeb64f5783a9e07a286de42191b7204d67b7496ddf35/Jinja2-2.11.3-py2.py3-none-any.whl (125kB) Collecting Werkzeug<2.0,>=0.15 (from flask->-r requirements.txt (line 1)) Downloading https://files.pythonhosted.org/packages/cc/94/5f7079a0e00bd6863ef8f1da638721e9da21e5bacee597595b318f71d62e/Werkzeug-1.0.1-py2.py3-none-any.whl (298kB) Collecting click<8.0,>=5.1 (from flask->-r requirements.txt (line 1)) Downloading https://files.pythonhosted.org/packages/d2/3d/fa76db83bf75c4f8d338c2fd15c8d33fdd7ad23a9b5e57eb6c5de26b430e/click-7.1.2-py2.py3-none-any.whl (82kB) Collecting itsdangerous<2.0,>=0.24 (from flask->-r requirements.txt (line 1)) Downloading https://files.pythonhosted.org/packages/76/ae/44b03b253d6fade317f32c24d100b3b35c2239807046a4c953c7b89fa49e/itsdangerous-1.1.0-py2.py3-none-any.whl Collecting urllib3<1.27,>=1.21.1 (from requests->-r requirements.txt (line 2)) Downloading https://files.pythonhosted.org/packages/af/f4/524415c0744552cce7d8bf3669af78e8a069514405ea4fcbd0cc44733744/urllib3-1.26.7-py2.py3-none-any.whl (138kB) Collecting idna<3,>=2.5; python_version < "3" (from requests->-r requirements.txt (line 2)) Downloading https://files.pythonhosted.org/packages/a2/38/928ddce2273eaa564f6f50de919327bf3a00f091b5baba8dfa9460f3a8a8/idna-2.10-py2.py3-none-any.whl (58kB) Collecting certifi>=2017.4.17 (from requests->-r requirements.txt (line 2)) Downloading https://files.pythonhosted.org/packages/37/45/946c02767aabb873146011e665728b680884cd8fe70dde973c640e45b775/certifi-2021.10.8-py2.py3-none-any.whl (149kB) Collecting chardet<5,>=3.0.2; python_version < "3" (from requests->-r requirements.txt (line 2)) Downloading https://files.pythonhosted.org/packages/19/c7/fa589626997dd07bd87d9269342ccb74b1720384a4d739a1872bd84fbe68/chardet-4.0.0-py2.py3-none-any.whl (178kB) Collecting MarkupSafe>=0.23 (from Jinja2<3.0,>=2.10.1->flask->-r requirements.txt (line 1)) Downloading https://files.pythonhosted.org/packages/b9/2e/64db92e53b86efccfaea71321f597fa2e1b2bd3853d8ce658568f7a13094/MarkupSafe-1.1.1.tar.gz Installing 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 urllib3-1.26.7 You 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 ---> 99831ef71094 Step 5/9 : COPY . /app ---> 2d6006fe0c32 Step 6/9 : WORKDIR /app ---> Running in dd5a0ef82c6a Removing intermediate container dd5a0ef82c6a ---> 2f02dd608139 Step 7/9 : EXPOSE 8080 ---> Running in 41dd76e23535 Removing intermediate container 41dd76e23535 ---> 5e8a803e2b31 Step 8/9 : ENTRYPOINT ["python"] ---> Running in 1445b35d4c4b Removing intermediate container 1445b35d4c4b ---> 43808464f62f Step 9/9 : CMD ["app.py"] ---> Running in e24f5500e614 Removing intermediate container e24f5500e614 ---> 761f1945fd23 Successfully built 761f1945fd23 Successfully tagged hello-webapp:v1
