2 docker engine_hands_on
0 likes19 views
This document provides an agenda for a Docker hands-on workshop covering Docker engine, creating a first Docker environment, the Docker CLI, Docker API, Docker networks, and Docker volumes. It includes steps to install Docker on a CentOS VM, pull images, run containers, access containers via API calls, and synchronize files between the host and containers using volumes.
![Docker API
• Configuration
• RUN =>
• RUN =>
• RUN =>
• RUN =>
• RUN =>
mkdir /etc/systemd/system/docker.service.d
systemctl daemon-reload
vi /etc/systemd/system/docker.service.d/override.conf
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0.0:2375
systemctl restart docker
systemctl stop firewalld; systemctl status firewalld](https://image.slidesharecdn.com/2dockerenginehandson-201123042454/85/2-docker-engine_hands_on-12-320.jpg)
![Docker API
• Restful API (pull a image and run)
• RUN => curl -X POST -H "Content-Type: application/json" -d
'{
"Hostname":"", "User":"", "Memory":0,
"MemorySwap":0, "AttachStdin":false,
"AttachStdout":true,"AttachStderr":true,
"PortSpecs":null,"Tty":false,"OpenStdin":false,
"StdinOnce":false,"Env":null,"Cmd":["nginx", "-g", "daemon off;"],
"Image":"nginx", "Tag":"latest",
"Volumes":{"/tmp":{}},
"WorkingDir":"","DisableNetwork":false,
"ExposedPorts":{"22/tcp": {} }
}' http://192.168.159.144:2375/containers/create
Try to check container status](https://image.slidesharecdn.com/2dockerenginehandson-201123042454/85/2-docker-engine_hands_on-15-320.jpg)
2 docker engine_hands_on
- 1. Docker Engine hands on 2020-11-18 Orozco Hsu
- 2. Agenda • Docker engine • Create your first docker environment • Docker CLI • Docker API • Docker network • Docker volume
- 5. Create your first docker environment • Install VMware Workstation 15 Pro in your laptop • https://mega.nz/file/zHxlyASC#47BjSzA8iR26nUT4g4YVVWTw0eo- qchQzPygLI4sE4U • Install CentOS7 (CentOS-7-x86_64-DVD-2003.iso) • https://mirrors.aliyun.com/centos/7/isos/x86_64/CentOS-7-x86_64-DVD- 2009.iso • Install Putty • https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
- 6. Create your first docker environment • System configuration • Memory: 4096 MB+ • CPU: 1 Processors+ • Hard Disk: 30GB+
- 7. Create your first docker environment • Install putty as your terminal tool • Get your IP RUN => ip addr
- 8. Create your first docker environment • Use putty to connect your host putty.exe
- 9. Create your first docker environment • Install docker • RUN => • RUN => • RUN => • RUN => • RUN => curl -sSL https://get.docker.com | sh reboot systemctl start docker systemctl status docker usermod -aG docker root Add root to dockerroot group
- 10. Docker CLI • Command • RUN => • RUN => • RUN => • RUN => • RUN => • RUN => • RUN => docker help docker run --help docker search alpine docker pull alpine docker images docker tag alpine orozcohsu/alpine:v1 docker rmi -f orozcohsu/alpine:v1
- 11. Docker API
- 12. Docker API • Configuration • RUN => • RUN => • RUN => • RUN => • RUN => mkdir /etc/systemd/system/docker.service.d systemctl daemon-reload vi /etc/systemd/system/docker.service.d/override.conf [Service] ExecStart= ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0.0:2375 systemctl restart docker systemctl stop firewalld; systemctl status firewalld
- 13. Docker API • API is enable • RUN => • RUN => docker info systemctl restart docker docker service must be restarting because of disable firewall
- 14. Docker API • Restful API (pull a image and run) • RUN => • RUN => • RUN => curl -v -XPOST http://192.168.159.144:2375/images/create?fromImage=nginx:latest curl http://192.168.159.144:2375/images/json | grep RepoTags Find local images curl -v -XPOST http://192.168.159.144:2375/images/create?fromImage=hermsi/alpine-sshd:latest
- 15. Docker API • Restful API (pull a image and run) • RUN => curl -X POST -H "Content-Type: application/json" -d '{ "Hostname":"", "User":"", "Memory":0, "MemorySwap":0, "AttachStdin":false, "AttachStdout":true,"AttachStderr":true, "PortSpecs":null,"Tty":false,"OpenStdin":false, "StdinOnce":false,"Env":null,"Cmd":["nginx", "-g", "daemon off;"], "Image":"nginx", "Tag":"latest", "Volumes":{"/tmp":{}}, "WorkingDir":"","DisableNetwork":false, "ExposedPorts":{"22/tcp": {} } }' http://192.168.159.144:2375/containers/create Try to check container status
- 16. Docker API • Restful API (pull a image and run) • RUN => • RUN => curl -X POST http://192.168.159.144:2375/containers/ID/start The initialized status of docker is in Created, use start to change its status to Up curl http://192.168.159.144:2375/containers/json?all=1 Try to docker exec and go to container
- 17. Docker API • Restful API (check container) • RUN => • RUN => • RUN => • RUN => curl -X POST http://192.168.159.144:2375/containers/ID/stop curl -X POST http://192.168.159.141:2375/containers/ID/restart?t=5 curl -X POST http://192.168.159.141:2375/containers/ID/kill curl http://192.168.159.144:2375/containers/ID/top number of seconds to wait before killing the container Try to check container status
- 18. Docker API • Parameters reference • https://docs.docker.com/engine/api/v1.24/#31-containers
- 19. Docker network
- 20. Docker network • Try to synchronize local folder with container volume • RUN => • RUN => docker run -d --rm -p 4001:22 --env ROOT_PASSWORD=1234 hermsi/alpine-sshd docker run -d --rm -p 4002:22 --env ROOT_PASSWORD=1234 hermsi/alpine-sshd Try to check container information
- 21. Docker network • Use putty to connect those containers
- 22. Docker volume • Try to use putty and connect to different linux container • RUN => • RUN => docker run -d --rm -v /tmp/app:/app --env ROOT_PASSWORD=1234 hermsi/alpine-sshd touch /tmp/app/test.txt Try to check local folder /tmp/app and container folder /app