Hướng dẫn cài đặt Docker

Cài đặt docker engine

Cài bản stable mới nhất

  • Các OS áp dụng: CentOS 7.3 64bit, Ubuntu 14.04 64bit, Ubuntu 16.04 64bit

  • Đăng nhập với quyên root và thực hiện lệnh dưới để cài đặt. Đảm bảo máy có kết nối internet. ```sh su -

    curl -sSL https://get.docker.com/ | sudo sh - Kết quả của lệnh trên như bên dướish If you would like to use Docker as a non-root user, you should now consider adding your user to the "docker" group with something like:

        sudo usermod -aG docker your-user

Remember that you will have to log out and back in for this to take effect!

WARNING: Adding a user to the "docker" group will grant the ability to run
                 containers which can be used to obtain root privileges on the
                 docker host.
                 Refer to https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface
                 for more information.
```

  • Thực hiện lệnh dưới để phân quyền cho user hiện tại thuộc group docker sh sudo usermod -aG docker `whoami`

  • Kích hoạt docker sau khi cài đặt xong và cho phép khởi động cùng OS sh systemctl start docker.service systemctl enable docker.service

  • Kiểm tra trạng thái của docker sau khi khởi động sh systemctl status docker.service

    • Kết quả lệnh trên như dưới là ok ```sh docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2017-09-06 21:54:07 +07; 31s ago Docs: https://docs.docker.com Main PID: 2194 (dockerd) CGroup: /system.slice/docker.service ├─2194 /usr/bin/dockerd └─2200 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-timeout 2m --state-dir /var/run/do...

      Sep 06 21:54:05 docker1 dockerd[2194]: time="2017-09-06T21:54:05.324752580+07:00" level=warning msg="failed to rename /var/lib/docker/tmp for background...hronously" Sep 06 21:54:05 docker1 dockerd[2194]: time="2017-09-06T21:54:05.421102352+07:00" level=warning msg="overlay: the backing xfs filesystem is formatted without d_ty... Sep 06 21:54:05 docker1 dockerd[2194]: time="2017-09-06T21:54:05.541746640+07:00" level=info msg="Graph migration to content-addressability took 0.00 seconds" Sep 06 21:54:05 docker1 dockerd[2194]: time="2017-09-06T21:54:05.544930723+07:00" level=info msg="Loading containers: start." Sep 06 21:54:06 docker1 dockerd[2194]: time="2017-09-06T21:54:06.931709192+07:00" level=info msg="Default bridge (docker0) is assigned with an IP addres...P address" Sep 06 21:54:07 docker1 dockerd[2194]: time="2017-09-06T21:54:07.880341611+07:00" level=info msg="Loading containers: done." Sep 06 21:54:07 docker1 dockerd[2194]: time="2017-09-06T21:54:07.934858409+07:00" level=info msg="Docker daemon" commit=8784753 graphdriver(s)=overlay v...17.07.0-ce Sep 06 21:54:07 docker1 dockerd[2194]: time="2017-09-06T21:54:07.936237331+07:00" level=info msg="Daemon has completed initialization" Sep 06 21:54:07 docker1 dockerd[2194]: time="2017-09-06T21:54:07.983301268+07:00" level=info msg="API listen on /var/run/docker.sock" Sep 06 21:54:07 docker1 systemd[1]: Started Docker Application Container Engine. Hint: Some lines were ellipsized, use -l to show in full. ```

  • Kiểm tra phiên bản của docker sau khi cài đặt, trong hướng dẫn này là bản 17.07.0-ce sh docker version

    • Kết quả như sau: ```sh Client: Version: 17.07.0-ce API version: 1.31 Go version: go1.8.3 Git commit: 8784753 Built: Tue Aug 29 17:42:01 2017 OS/Arch: linux/amd64

      Server: Version: 17.07.0-ce API version: 1.31 (minimum version 1.12) Go version: go1.8.3 Git commit: 8784753 Built: Tue Aug 29 17:43:23 2017 OS/Arch: linux/amd64 Experimental: false ```

  • Kiểm tra xem docker đã hoạt động hay chưa sh docker pull hello-world

    • Kết quả như sau: sh Using default tag: latest latest: Pulling from library/hello-world b04784fba78d: Pull complete Digest: sha256:f3b3b28a45160805bb16542c9531888519430e9e6d6ffc09d72261b0d26ff74f Status: Downloaded newer image for hello-world:latest

  • Thử tạo container đầu tiên sh docker run hello-world

    • Kết quả như sau: ```sh Hello from Docker! This message shows that your installation appears to be working correctly.

      To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal.

      To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash

      Share images, automate workflows, and more with a free Docker ID: https://cloud.docker.com/

      For more examples and ideas, visit: https://docs.docker.com/engine/userguide/ ```

  • Kết thúc việc cài đặt, nếu kết quả ổn thì bạn đã có thể bắt đầu tìm hiểu về docker.