Docker Basic - HackMD

# Docker 把Linux變成Router， root 權限變更 /proc/sys/net/ipv4/ip_forward `echo 1 > /proc/sys/net/ipv4/ip_forward` ## 安裝docker ### Ubuntu 參考: [Install Docker Engine on Ubuntu](https://docs.docker.com/engine/install/ubuntu/) * 如有舊版，移除步驟 ``` for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done ``` * 安裝 ```= # Add Docker's official GPG key: sudo apt-get update sudo apt-get install ca-certificates curl gnupg sudo install -m 0755 -d /etc/apt/keyrings curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg sudo chmod a+r /etc/apt/keyrings/docker.gpg # Add the repository to Apt sources: echo \ "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \ "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \ sudo tee /etc/apt/sources.list.d/docker.list > /dev/null sudo apt-get update # 最新版docker sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin ``` * 啟動 ``` sudo systemctl start docker sudo systemctl enable docker ``` * 查看版本 ``` docker --version ``` * 測試 ``` sudo docker run hello-world ``` ![image](https://hackmd.io/_uploads/SkujYKN46.png) ### CentOS 參考: [Install Docker Engine on CentOS](https://docs.docker.com/engine/install/centos/) * 如有舊版，移除步驟 ``` sudo yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine ``` * 安裝 ```= sudo yum install -y yum-utils sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin ``` * 啟動 ``` sudo systemctl start docker ``` * 查看版本 ``` docker --version ``` * 測試 ``` sudo docker run hello-world ``` ![image](https://hackmd.io/_uploads/ryhk2wVNT.png) --- ## 安裝鏡像&容器 (install image&container) * 安裝鏡像 [docker_centos](https://hub.docker.com/_/centos/tags) `sudo docker pull [image Name]` 個人選擇 7.9.2009 版本 **安裝前須注意系統架構是否支援** `docker pull centos:centos7.9.2009` * 使用 ```dockerfile= [user@centos-vm3 ~]$ sudo docker run centos:centos7.9.2009 echo "hello world" hello world ``` --- ## 刪除容器 (delete container) ```dockerfile= # 查看全部容器 [user@centos-vm3 ~]$ sudo docker ps # 執行中的容器 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES [user@centos-vm3 ~]$ sudo docker ps -a # 包含執行完的容器 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 40f9d68ee878 centos:centos7.9.2009 "echo 'hello world'" 13 minutes ago Exited (0) 13 minutes ago optimistic_goldstine eb161a9589ef hello-world "/hello" 19 minutes ago Exited (0) 19 minutes ago determined_noyce # 刪除容器 [user@centos-vm3 ~]$ sudo docker rm optimistic_goldstine # 用 "NAMES" 刪除 optimistic_goldstine [user@centos-vm3 ~]$ sudo docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES eb161a9589ef hello-world "/hello" 22 minutes ago Exited (0) 22 minutes ago determined_noyce [user@centos-vm3 ~]$ sudo docker rm eb161a9589ef #用 "CONTAINER ID" 刪除 (可以只打ID的前幾個代號) eb161a9589ef [user@centos-vm3 ~]$ sudo docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES # 刪除多個容器 [user@centos-vm3 ~]$ sudo docker ps -a # 刪除前確認 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a230d060b9b3 busybox:0.1 "sh" 6 minutes ago Up 6 minutes b2 1fafafe132ec busybox "sh" 19 minutes ago Exited (0) 6 minutes ago b1 de9f9a8221d4 busybox "sh" 24 minutes ago Exited (0) 19 minutes ago keen_matsumoto c212f43e6813 busybox "sh" 50 minutes ago Exited (0) 20 minutes ago keen_blackburn [user@centos-vm3 ~]$ sudo docker ps -a -q # 顯示ID a230d060b9b3 1fafafe132ec de9f9a8221d4 c212f43e6813 [user@centos-vm3 ~]$ sudo docker rm `sudo docker ps -aq` 1fafafe132ec de9f9a8221d4 c212f43e6813 Error response from daemon: You cannot remove ...... attempting removal or force remove [user@centos-vm3 ~]$ sudo docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a230d060b9b3 busybox:0.1 "sh" 10 minutes ago Up 10 minutes b2 # 連運作中的container 一併刪除 [user@centos-vm3 ~]$ sudo docker rm -f `sudo docker ps -aq` a230d060b9b3 [user@centos-vm3 ~]$ sudo docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ``` --- ## 刪除鏡像 (delete image) ```dockerfile= [user@centos-vm3 ~]$ sudo docker images # 查看安裝的鏡像 REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest 9c7a54a9a43c 6 months ago 13.3kB centos centos7.9.2009 eeb6ee3f44bd 2 years ago 204MB [user@centos-vm3 ~]$ sudo docker rmi 9c7a # 用ID刪除 Untagged: hello-world:latest Untagged: hello-world@sha256:c79d06dfdfd3d3eb04cafd0dc2bacab0992ebc243e083cabe208bac4dd7759e0 Deleted: sha256:9c7a54a9a43cca047013b82af109fe963fde787f63f9e016fdc3384500c2823d Deleted: sha256:01bb4fce3eb1b56b05adf99504dafd31907a5aadac736e36b27595c8b92f07f1 [user@centos-vm3 ~]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos centos7.9.2009 eeb6ee3f44bd 2 years ago 204MB ``` --- ## docker_busybox ```dockerfile= # terminal 1 [user@centos-vm3 ~]$ sudo docker pull busybox Using default tag: latest # 不加版本就抓最新的 latest: Pulling from library/busybox 3f4d90098f5b: Pull complete Digest: sha256:3fbc632167424a6d997e74f52b878d7cc478225cffac6bc977eedfe51c7f4e79 Status: Downloaded newer image for busybox:latest docker.io/library/busybox:latest # -i: 允許向容器輸入 -t: 提供終端界面--這兩者一起使用時，可以在容器內進行交互。 [user@centos-vm3 ~]$ sudo docker run -it busybox sh / # # terminal 2 [user@centos-vm3 ~]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES c212f43e6813 busybox "sh" 3 minutes ago Up 3 minutes keen_blackburn ``` **執行中的image(STATUS: up)** ![image](https://hackmd.io/_uploads/BkY6wQiV6.png) **ip check** ![image](https://hackmd.io/_uploads/BkZLdQoEa.png) --- ## back_up image (local) `sudo docker commit -h` ```dockerfile= # terminal 1 [user@centos-vm3 ~]$ sudo docker run -it --name b1 busybox sh / # # terminal 2 [user@centos-vm3 ~]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 1fafafe132ec busybox "sh" 36 seconds ago Up 35 seconds b1 ``` ![image](https://hackmd.io/_uploads/rkl8RmjEa.png) ```dockerfile= / # ls bin etc lib proc sys usr dev home lib64 root tmp var / # echo "hi" > hi.txt / # ls bin etc home lib64 root tmp var dev hi.txt lib proc sys usr / # # 如果這時候直接 `exit` =沒存檔直接離開 ``` **儲存image** ```dockerfile= # terminal # sudo docker commit [CONTAINER(Name/ID)] [REPOSITORY:[TAG]] [user@centos-vm3 ~]$ sudo docker commit b1 busybox:0.1 # 這才是完整的ID sha256:33943135d40e0d70d36cd0a0f0ca1c80b9623669678217cc8e2db3e5c839bc3d [user@centos-vm3 ~]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE busybox 0.1 33943135d40e 7 seconds ago 4.26MB busybox latest a416a98b71e2 4 months ago 4.26MB centos centos7.9.2009 eeb6ee3f44bd 2 years ago 204MB ``` **開啟image** ```dockerfile= # terminal in busybox / # exit [user@centos-vm3 ~]$ sudo docker run -it --name b2 busybox:0.1 sh / # ls bin etc home lib64 root tmp var dev hi.txt lib proc sys usr / # ``` --- ## docker python [python](https://hub.docker.com/_/python/tags) ```dockerfile= # 本地沒有python [user@centos-vm3 ~]$ python3 bash: python3: command not found... Similar command is: 'python' # 在 docker 安裝 python [user@centos-vm3 ~]$ sudo docker pull python:3.9.18-slim # 本地建立目錄 [user@centos-vm3 ~]$ mkdir -p docker_python [user@centos-vm3 ~]$ cd docker_python/ [user@centos-vm3 docker_python]$ vim hello.py [user@centos-vm3 docker_python]$ cat hello.py print("Hello World!") # 開啟容器 # "-v"是做資料夾的映射，把本地的/home/user/docker_python/ 與容器的/tmp 連結 # 執行容器python:3.9.18-slim 容器執行bash [user@centos-vm3 ~]$ sudo docker run -it -v /home/user/docker_python/:/tmp python:3.9.18-slim bash # python:3.9.18-slim_bash root@8f8a0d73ee69:/# ls bin dev home lib32 libx32 mnt proc run srv tmp var boot etc lib lib64 media opt root sbin sys usr root@8f8a0d73ee69:/# cd /tmp root@8f8a0d73ee69:/tmp# ls hello.py root@8f8a0d73ee69:/tmp# python hello.py Hello World! ``` --- ## 進入執行中的容器 exec ```dockerfile [user@centos-vm3 ~]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES bfe569db8cd9 centos:web "/usr/sbin/apachectl…" 51 minutes ago Up 51 minutes 0.0.0.0:8080->80/tcp, :::8080->80/tcp web [user@centos-vm3 ~]$ sudo docker exec -it bfe bash [root@bfe569db8cd9 /]# ``` --- ## docker web_server & port_building * port building ![photo_2023-11-22_18-47-15](https://hackmd.io/_uploads/HyOH2LsVa.jpg) ```dockerfile= # -d: 讓容器在背景執行並顯示容器ID [user@centos-vm3 ~]$ sudo docker run --name web -d -p 8080:80 centos:web /usr/sbin/apachectl -DFOREGROUND bfe569db8cd9dea6297e82ecbc032f1df35bd05a1045cdc4130d3d07f5539de7 [user@centos-vm3 ~]$ sudo docker ps # 因為啟動著 web server 所以不會直接結束 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES bfe569db8cd9 centos:web "/usr/sbin/apachectl…" 2 minutes ago Up 2 minutes 0.0.0.0:8080->80/tcp, :::8080->80/tcp web ``` **測試** ```bash= [user@centos-vm3 ~]$ ip a s 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:bc:ca:63 brd ff:ff:ff:ff:ff:ff inet 192.168.68.111/24 brd 192.168.68.255 scope global noprefixroute ens33 ``` ![image](https://hackmd.io/_uploads/Hyk31PsVp.png) * 變更網頁 1. 進入到 container(容器) 修改 ```bash [root@bfe569db8cd9 /]# cd /var/www/html/ [root@bfe569db8cd9 html]# echo "hi" > hi.htm [root@bfe569db8cd9 html]# ls hi.htm ``` :::warning 不建議用這種方法，如果沒有先儲存就離開東西就白做了 ::: 2. 在 terminal 啟動 web server ```bash= # 在本地先建立目錄並寫入 [root@centos-vm3 user]# mkdir -p myweb [root@centos-vm3 user]# cd ./myweb/ [root@centos-vm3 myweb]# vim hi.htm [root@centos-vm3 myweb]# cat hi.htm hihihi # 參數跟相關指令下完才輪到 image ex: docker run -d -p -v ... centos:web ... [root@centos-vm3 myweb]# docker run -d -p 8080:80 -v /home/user/myweb/:/var/www/html centos:web /usr/sbin/apachectl -DFOREGROUND b7b727e0c09ced9902e84d121c1fac50d4086daa24d2b0381c62c9081007a5db [root@centos-vm3 myweb]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b7b727e0c09c centos:web "/usr/sbin/apachectl…" 4 minutes ago Up 4 minutes 0.0.0.0:8080->80/tcp, :::8080->80/tcp stupefied_poincare ``` --- ## 啟動多個 docker web_server ### 逐行執行 ```dockerfile= # 注意: name 跟 prot number 必須不同 [user@centos-vm3 ~]$ sudo docker run --name web2 -d -p 8081:80 -v /home/user/docker_web/:/var/www/html/ centos:web /usr/sbin/apachectl -DFOREGROUND 7eaa2c96b217635cc39d7c3c66242933fbe003a4c0f05edd0abf07dd4ee8de9f [user@centos-vm3 ~]$ sudo docker run --name web3 -d -p 8082:80 -v /home/user/docker_web/:/var/www/html/ centos:web /usr/sbin/apachectl -DFOREGROUND 4c34a281f0f802047eaea17a6274d6838ab92956f5f146448de6eb6f312c126b [user@centos-vm3 ~]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 4c34a281f0f8 centos:web "/usr/sbin/apachectl…" 6 seconds ago Up 5 seconds 0.0.0.0:8082->80/tcp, :::8082->80/tcp web3 7eaa2c96b217 centos:web "/usr/sbin/apachectl…" 54 seconds ago Up 53 seconds 0.0.0.0:8081->80/tcp, :::8081->80/tcp web2 8655e0df747c centos:web "/usr/sbin/apachectl…" 3 hours ago Up 3 hours 0.0.0.0:8080->80/tcp, :::8080->80/tcp web ``` **移除** ```dockerfile [user@centos-vm3 ~]$ sudo docker rm -f `sudo docker ps -aq` 4c34a281f0f8 7eaa2c96b217 8655e0df747c ``` ### 腳本執行 ```dockerfile= # 注意: 對接的 port 要補上, web_name的容許範圍[a-zA-Z0-9][a-zA-Z0-9_.-] [user@centos-vm3 ~]$ cat ./docker_web.sh #!/usr/bin/bash for i in {1..5} do protnum=`expr 8080 + $i` webname=`expr 0 + $i` sudo docker run -d -p $portnum:80 -v /home/user/docker_web/:/var/www/html --name web$webname centos:web /usr/sbin/apachectl -DFOREGROUND done [user@centos-vm3 ~]$ chmod +x ./docker_web.sh [user@centos-vm3 ~]$ ./docker_web.sh ``` ![image](https://hackmd.io/_uploads/S1Gd3_n46.png) --- ## Load_Balancer * 使用的是 haproxy ```dockerfile= [user@centos-vm3 ~]$ sudo yum install haproxy openssl-devel -y [user@centos-vm3 ~]$ cd /etc/haproxy/ [user@centos-vm3 haproxy]$ sudo vim haproxy.cfg [user@centos-vm3 haproxy]$ cat haproxy.cfg defaults mode http # relational setting timeout client 10s timeout connect 5s timeout server 10s timeout http-request 10s frontend myfrontend bind 0.0.0.0:8080 # Load Balancer port default_backend myservers backend myservers balance roundrobin # docker web using port server server1 192.168.68.111:8001 server server2 192.168.68.111:8002 server server3 192.168.68.111:8003 server server4 192.168.68.111:8004 server server5 192.168.68.111:8005 [user@centos-vm3 ~]$ sudo systemctl start haproxy ``` ```b # 檢查 [user@centos-vm3 haproxy]$ sudo netstat -tunlp | grep 8080 tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 13944/haproxy ``` ![1700727025243](https://hackmd.io/_uploads/rJt4tFh46.gif) --- ## back_up image (Cloud) * image copy ```dockerfile= [user@centos-vm3 ~]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos web c88f50f77c4c 24 hours ago 466MB # 產生一個image, 符合 account/images:tag (推到docker hub的話) [user@centos-vm3 ~]$ sudo docker tag c88 xuanlin123/centos:web [user@centos-vm3 ~]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos web c88f50f77c4c 24 hours ago 466MB xuanlin123/centos web c88f50f77c4c 24 hours ago 466MB ``` * docker_hub login ```dockerfile= [user@centos-vm3 ~]$ sudo docker login Log in with your Docker ID or email address to push and pull images from ...... ...You can log in with your password or a Personal Access Token (PAT). ... . . . . . . . . . Login Succeeded ``` * upload ```dockerfile= [user@centos-vm3 ~]$ sudo docker push xuanlin123/centos:web The push refers to repository [docker.io/xuanlin123/centos] 1bee866f4fa0: Pushed 174f56854903: Mounted from library/centos web: digest: sha256:cdb93dc8f09127b5a522e043b80a23986d54bb6c9a265dd5715f7064006ba078 size: 742 ``` ![image](https://hackmd.io/_uploads/S1W2Zq3Ea.png) * delete local image ```dockerfile= [user@centos-vm3 ~]$ sudo docker rmi xuanlin123/centos:web Untagged: xuanlin123/centos:web Untagged: xuanlin123/centos@sha256:cdb93dc8f09127b5a522e043b80a23986d54bb6c9a265dd5715f7064006ba078 [user@centos-vm3 ~]$ sudo docker rmi centos:web # 如果報這個錯代表image使用中 Error response from daemon: conflict: unable to remove repository reference "centos:web" (must force) - container e70fab89b3ec is using its referenced image c88f50f77c4c [user@centos-vm3 ~]$ sudo docker rm -f `sudo docker ps -aq` 5e8192f6787a b81946a3070b cf82bdebcac3 755666acfe98 e70fab89b3ec [user@centos-vm3 ~]$ sudo docker rmi centos:web Untagged: centos:web Deleted: sha256:c88f50f77c4c600c198ccf0b39bba232aab4e3a13c58ee6c92c2e10015d38130 Deleted: sha256:fa1a9bee6e2c17f4d5defff4628caa1ce8178bce2f35cc89f62024aed721abfa [user@centos-vm3 ~]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE ``` * pull cloud image ```dockerfile= [user@centos-vm3 ~]$ sudo docker pull xuanlin/centos:web web: Pulling from xuanlin123/centos 2d473b07cdd5: Already exists 457848f234d3: Pull complete Digest: sha256:cdb93dc8f09127b5a522e043b80a23986d54bb6c9a265dd5715f7064006ba078 Status: Downloaded newer image for xuanlin123/centos:web docker.io/xuanlin123/centos:web ``` --- ## 打包&匯入鏡像 `sudo docker save -h` * 本地的備份 ```bash # 要打包的image: centos:web , 壓縮後的名稱: centos_web.tar [user@centos-vm3 ~]$ sudo docker save centos:web > centos_web.tar [user@centos-vm3 ~]$ ls centos_web.tar ``` ```dockerfile [user@centos-vm3 ~]$ sudo docker load < centos_web.tar Loaded image: centos:web ``` --- ## dockerfile * 建立之後會有新的image ```dockerfile= # 建一個測試目錄 [user@centos-vm3 ~]$ mkdir -p dockerfile [user@centos-vm3 ~]$ cd dockerfile/ ``` ```dockerfile= # 編寫Dockerfile("D"必須大寫) [user@centos-vm3 dockerfile]$ vim Dockerfile [user@centos-vm3 dockerfile]$ echo "test dockerfile" > ./index.html [user@centos-vm3 dockerfile]$ cat index.html test dockerfile [user@centos-vm3 dockerfile]$ cat Dockerfile FROM centos:centos7.9.2009 RUN yum install -y httpd EXPOSE 80 ADD index.html /var/www/html/ ``` ```dockerfile= # 執行Dockerfile 最後面的 . 指的是Dockerfile [user@centos-vm3 dockerfile]$ sudo docker build -t dockerfile:web . # 執行過程 [+] Building 51.8s (8/8) FINISHED docker:default => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 129B 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [internal] load metadata for docker.io/library/centos:centos7.9.2009 0.0s => [1/3] FROM docker.io/library/centos:centos7.9.2009 0.0s => [internal] load build context 0.0s => => transferring context: 53B 0.0s => [2/3] RUN yum install -y httpd 50.5s => [3/3] ADD index.html /var/www/html/ 0.1s => exporting to image 1.1s => => exporting layers 1.1s => => writing image sha256:b74740fc8f01cc73d3cd3d355d893b5f871a4d09a3431fbb7dc7edf4e625c345 0.0s => => naming to docker.io/library/dockerfile:web # image check [user@centos-vm3 dockerfile]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE dockerfile web b74740fc8f01 About a minute ago 466MB # run image [user@centos-vm3 dockerfile]$ sudo docker run --name dockerfileweb -d -p 8080:80 dockerfile:web /usr/sbin/apachectl -DFOREGROUND [user@centos-vm3 dockerfile]$ sudo netstat -tunlp | grep 8080 tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 4481/docker-proxy tcp6 0 0 :::8080 :::* LISTEN 4487/docker-proxy ``` ![image](https://hackmd.io/_uploads/H1I8u224p.png) --- ## Something else * start container & enter bash ```bash= [user@docker1 ~]$ sudo docker run -d -p 8080:80 --name www httpd 7cdea508d848daeabdfe838ecb21ac0a4b0c95d3bf7beb00541a86674aa5f31f [user@docker1 ~]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 7cdea508d848 httpd "httpd-foreground" 5 seconds ago Up 4 seconds 0.0.0.0:8080->80/tcp, :::8080->80/tcp www [user@docker1 ~]$ sudo docker exec -it 7cd bash root@7cdea508d848:/usr/local/apache2# ``` * 直接使用 apache image 的話網頁存放位置與 CentOS 不同 ```bash= root@7cdea508d848:/usr/local/apache2# ls bin build cgi-bin conf error htdocs icons include logs modules root@7cdea508d848:/usr/local/apache2# cd htdocs/ root@7cdea508d848:/usr/local/apache2/htdocs# ls index.html ``` * 暫時離開 & 回到 container bash ```bash= # 同時按 [Ctrl + p + q] root@7cdea508d848:/usr/local/apache2/htdocs# read escape sequence [user@docker1 ~]$ # 回到剛剛的 image , 但是這個 image 本來就在背景執行, 所以沒有反應 [user@docker1 ~]$ sudo docker attach 7cd # 因此要回到 bash 環境下還是執行 exec [user@docker1 ~]$ sudo docker exec -it 7cd bash root@7cdea508d848:/usr/local/apache2# ``` * 儲存 image ```bash= root@7cdea508d848:/usr/local/apache2/htdocs# echo "HIHIHI" > hi.htm root@7cdea508d848:/usr/local/apache2/htdocs# ls hi.htm index.html root@7cdea508d848:/usr/local/apache2/htdocs# read escape sequence [user@docker1 ~]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 7cdea508d848 httpd "httpd-foreground" 15 minutes ago Up 4 minutes 0.0.0.0:8080->80/tcp, :::8080->80/tcp www [user@docker1 ~]$ sudo docker commit 7cd httpd:0.1 sha256:eac6a91d6c0e65b6b2b3efb5addf998026ed0a9c525093830be34f1ad3237ba1 [user@docker1 ~]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE httpd 0.1 eac6a91d6c0e About a minute ago 168MB ``` * 加上 "rm" 在 stop 之後會自動刪除 container ```bash= [user@docker1 ~]$ sudo docker run -d -p 8080:80 --rm httpd:0.1 95e7c0374fa6b7d27684e4ad32e039188e6bf0c3214b75a73a8c1a837716d4f1 [user@docker1 ~]$ sudo docker stop 95e 95e [user@docker1 ~]$ sudo docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ``` * 上傳到 docker_hub ```bash= [user@docker1 ~]$ sudo docker tag httpd:0.1 xuanlin123/httpd:0.1 [user@docker1 ~]$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE httpd 0.1 eac6a91d6c0e 24 minutes ago 168MB xuanlin123/httpd 0.1 eac6a91d6c0e 24 minutes ago 168MB ``` * web server 目錄連結 ```bash= # 啟動完依照IP連過去看看 [user@docker1 ~]$ sudo docker run --name www --rm -d -p 8080:80 -v /home/user/Docker_Basic_test/docker_web/:/usr/local/apache2/htdocs httpd 271f317e5a6ed92347ed3f4c5a29bbd944386a8f38a9bed6e1122d79241762f5 [user@docker1 ~]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 271f317e5a6e httpd "httpd-foreground" 5 seconds ago Up 5 seconds 0.0.0.0:8080->80/tcp, :::8080->80/tcp www ``` --- ## log 此為[Docker Network_實作測試](https://hackmd.io/b0ReOSeyS4WC5wubgCBZnQ?both#:~:text=forever%20preferred_lft%20forever-,%E5%AF%A6%E4%BD%9C%E6%B8%AC%E8%A9%A6,-%E7%95%99%E8%A8%80)的log ```bash= [user@docker1 docker_network]$ sudo docker logs 131 * Serving Flask app 'app.py' * Debug mode: off WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead. * Running on all addresses (0.0.0.0) * Running on http://127.0.0.1:5000 * Running on http://172.18.0.3:5000 Press CTRL+C to quit 192.168.68.1 - - [26/Nov/2023 13:34:15] "GET / HTTP/1.1" 200 - 192.168.68.1 - - [26/Nov/2023 13:34:16] "GET / HTTP/1.1" 200 - 192.168.68.1 - - [26/Nov/2023 13:34:17] "GET / HTTP/1.1" 200 - 192.168.68.1 - - [26/Nov/2023 13:34:17] "GET / HTTP/1.1" 200 - 192.168.68.1 - - [26/Nov/2023 13:34:17] "GET / HTTP/1.1" 200 - ``` --- ## Practice 1. 用腳本創建10個httpd docker port:8080~8089 ```bash= # shell [user@docker1 Q1]$ cat Q1.sh #!/usr/bin/bash for i in {1..10} do portnum=$((8079 + $i)) web=$((0 + $i)) sudo docker run -d -p $portnum:80 --name web$web -v "$PWD":/usr/local/apache2/htdocs/ httpd done ----------------------------------------------------------------------------------------------- # result [user@docker1 Q1]$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 7f46c1774bd3 httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8089->80/tcp, :::8089->80/tcp web10 da48c0803836 httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8088->80/tcp, :::8088->80/tcp web9 815377fea02c httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8087->80/tcp, :::8087->80/tcp web8 bf05e079f3c8 httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8086->80/tcp, :::8086->80/tcp web7 1506856edba3 httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8085->80/tcp, :::8085->80/tcp web6 1d0ff7a2c0ef httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8084->80/tcp, :::8084->80/tcp web5 812ef193b394 httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8083->80/tcp, :::8083->80/tcp web4 ed36e5ac4c73 httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8082->80/tcp, :::8082->80/tcp web3 532196b4a50e httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8081->80/tcp, :::8081->80/tcp web2 643e9a2b2176 httpd "httpd-foreground" 3 minutes ago Up 3 minutes 0.0.0.0:8080->80/tcp, :::8080->80/tcp web1 ``` 2. 用腳本關閉 Q1 的10個 httpd docker ```bash= # shell [user@docker1 Q2]$ cat Q2.sh #!/usr/bin/bash sudo docker stop `sudo docker ps -aq` echo "already stop" sudo docker rm `sudo docker ps -aq` echo "already remove" ------------------------------------ # result [user@docker1 Q2]$ ./Q2.sh 9c40857a1764 6daafb837a55 c285837d7308 ebc51e7288a9 1d545599c60e 36337df08a7c d6d2dac96061 24f1f6043f06 a544fd208442 d5a576dd2684 already stop # 停止提示 9c40857a1764 6daafb837a55 c285837d7308 ebc51e7288a9 1d545599c60e 36337df08a7c d6d2dac96061 24f1f6043f06 a544fd208442 d5a576dd2684 already remove # 刪除提示 ```

Syntax	Example	Reference
# Header	Header	基本排版
- Unordered List	Unordered List
1. Ordered List	Ordered List
- [ ] Todo List	Todo List
> Blockquote	Blockquote
Bold font	Bold font
Italics font	Italics font
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19^th^	19^th
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[link text](https:// "title")	Link
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`Code`	`Code`	在筆記中貼入程式碼
```javascript var i = 0; ```	`var i = 0;`
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{%youtube youtube_id %}	Externals
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:::info This is a alert area. :::	This is a alert area.