# Docker實作營 ## 實作步驟及摘要 1 環境準備 2 搜尋並取得映像檔 3 利用映像檔建立容器 * 網路設定 * 建立容器時，使用網路預設值（即bridge） * 建立容器時，設定port mapping * 建立容器時，使用host network * 同步容器資料 * 同步本機資料 * 傳入環境變數 4 撰寫及使用Dockerfile * git clone from Github * 調整Dockerfile後，建立映像檔 5 Docker Compose 6 Docker Push到倉庫 ## 實作1 環境準備 * 申請Docker帳號（） * 登入`Play with Docker`（） ![](/files/-MCzKUrQ4AP641LvgyvL) * 按下`Start`開始 ![](/files/-MCzMFZqNEKyFXv5vHhy) * 按下左邊的 `+ ADD NEW INSTANCE`，即可開始作業 ![](/files/-MCzMjJkDg1ugiXY5bwH) ## 實作2 搜尋並取得映像檔 用`docker search`搜尋`nginx` ``` $ docker search nginx NAME DESCRIPTION STARS OFFICIAL AUTOMATED nginx Official build of Nginx. 13505 [OK] jwilder/nginx-proxy Automated Nginx reverse proxy for docker con… 1841 [OK] richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of… 780 [OK] linuxserver/nginx An Nginx container, brought to you by LinuxS… 122 bitnami/nginx Bitnami nginx Docker Image 87 [OK] tiangolo/nginx-rtmp Docker image with Nginx using the nginx-rtmp… 85 [OK] jc21/nginx-proxy-manager Docker container for managing Nginx proxy ho… 72 alfg/nginx-rtmp NGINX, nginx-rtmp-module and FFmpeg from sou… 71 [OK] ``` * 在`Docker Hub`搜尋`nginx`，並過濾`tag = 1.13-alpine`，找到`docker pull`指令 ![](/files/-MCzPUg5ANwWDxxb15-0) * 執行`docker pull nginx:1.13-alpine`下載`nginx`映像檔 ## 實作3 利用映像檔建立容器 * 利用`docker pull`下載`cutejaneii/docker.python_demo`映像檔 * 將上述映像檔，再上一個新的tag : `myapp` * 利用`docker images`查看所有映像檔 ![](/files/-MDDhbNkUtJ4DAXe6tJd) * 用`myapp`映像檔建立容器 * 建立容器時，使用網路預設值（即bridge） * 建立容器時，設定port mapping * 建立容器時，使用host network 建立完成後，可用`curl`測試看看是否成功 ``` $ curl 127.0.0.1:8080 Hello World! (Python 2.7.16) everyone!! $ curl 127.0.0.1:80 Hello World! (Python 2.7.16) everyone!! ``` * 同步容器資料 * 同步本機資料 本機建立一個app資料夾，加入以下的main.py，再用-v的方式建立容器，`docker run -d -p 8888:80 -v /app:/app myapp` ``` import os from flask import Flask app = Flask(__name__) @app.route("/") def hello(): return "Good Morning!!!!! " + os.environ['owner'] if __name__ == "__main__": app.run(host="0.0.0.0", debug=True, port=80) ``` 最後用`curl`測試看看是否成功 ``` $ curl 127.0.0.1:8888 Good Morning!!!!! everyone!! ``` * 傳入環境變數 `docker run -d -p 9999:80 -e "owner=Jennifer" myapp` 用`curl`測試看看是否成功 ``` $ curl 127.0.0.1:9999 Hello World (Python 2.7.16) Jennifer ``` ## 實作4 撰寫及使用Dockerfile * git clone from Github ``` $ git clone https://github.com/cutejaneii/docker.python_demo.git Cloning into 'docker.python_demo'... remote: Enumerating objects: 10, done. remote: Counting objects: 100% (10/10), done. remote: Compressing objects: 100% (7/7), done. Receiving objects: 100% (10/10), done. remote: Total 10 (delta 1), reused 0 (delta 0), pack-reused 0 Resolving deltas: 100% (1/1), done. ``` * 調整Dockerfile後，建立映像檔 ``` $ docker build -t myapp . ``` ## 實作5 Docker Compose 撰寫docker-compose.yml ``` version: '3' services: app: image: myapp ports: - 5566:80 restart: always environment: - owner=LIAO ``` 執行`docker-compose` ``` $ docker-compose -f docker-compose.yml up Recreating root_app_1 ... done Attaching to root_app_1 app_1 | * Serving Flask app "main" (lazy loading) app_1 | * Environment: production app_1 | WARNING: This is a development server. Do not use it in a production deployment. app_1 | Use a production WSGI server instead. app_1 | * Debug mode: on app_1 | * Running on http://0.0.0.0:80/ (Press CTRL+C to quit) app_1 | * Restarting with stat app_1 | * Debugger is active! app_1 | * Debugger PIN: 162-450-668 ``` 用`curl`看看 ``` $ curl 192.168.0.8:5566 Hello World! (Python 2.7.16) LIAO ``` ## 實作5 Docker Push到倉庫 Docker Push到公用倉庫Docker Hub * Docker Login ``` $ docker login Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one. Username: cutejaneii Password: WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded ``` * Docker Tag：在推送到自己的repository之前，要先tag ``` $ docker tag myapp cutejaneii/myapp $ docker images REPOSITORY TAG IMAGE ID CREATED SIZE cutejaneii/myapp latest 7aba68965779 40 minutes ago 696MB myapp latest 7aba68965779 40 minutes ago 696MB ``` * Docker Push ``` $ docker push cutejaneii/myapp The push refers to repository [docker.io/cutejaneii/myapp] 4e5b25e56255: Pushed 27ca79121151: Pushed e1a81b1589ce: Pushed f8093b983c20: Pushed ebac8a5e2f5b: Pushed ebd94299f5d0: Pushed ff1c70957ceb: Pushed 1bb42387f7cb: Pushed 94119923fb5e: Pushed a11003618325: Pushed 668c51fd0cef: Pushed latest: digest: sha256:cd0d1e36474560d95f081fb96efe9d3182802a196a89fd9b2f617b058515d807 size: 2635 ``` 成功後在Docker Hub上就可以看到這個映像檔 ![](/files/-MDIBkHN2NUWd74G2MMC) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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