docker 安装（ubuntu）

更新apt库安装包索引

sudo apt-get update

由于访问docker库需要使用https，需要安装https的依赖包

$sudo apt-get install apt-transport-https ca-certificates curl gunpg-agent software-properties-common

 添加docker的官方GPG公钥：

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

 校验公钥是否添加成功，通过搜索公钥fingerprint后八位即可验证（9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88）：

$ sudo apt-key fingerprint 0EBFCD88

 通过下面命令将stable(稳定版）docker库添加到本地apt仓库

$ sudo add-apt-repository    "deb [arch=amd64] https://download.docker.com/linux/ubuntu    $(lsb_release -cs)    stable"

 更新本地仓库包索引：

sudo apt-get update

列出本地仓库可用的版本列表：

apt-cache madison docker-ce

 执行安装： sudo apt-get install docker-ce=5:19.03.6~3-0~ubuntu-bionic docker-ce-cli=5:19.03.6~3-0~ubuntu-bionic containerd.io

 报错，提示执行： sudo dpkg --configure -a

执行之：

执行Ok后继续安装：

:/var/cache/apt/archives$ sudo apt-get install docker-ce=5:19.03.6~3-0~ubuntu-bionic docker-ce-cli=5:19.03.6~3-0~ubuntu-bionic containerd.io
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  aufs-tools cgroupfs-mount libltdl7 linux-modules-extra-4.15.0-88-generic pigz
The following NEW packages will be installed:
  aufs-tools cgroupfs-mount containerd.io docker-ce docker-ce-cli libltdl7 pigz
The following packages will be upgraded:
  linux-modules-extra-4.15.0-88-generic
1 upgraded, 7 newly installed, 0 to remove and 18 not upgraded.
1 not fully installed or removed.
Need to get 85.8 MB/119 MB of archives.
After this operation, 554 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu bionic/universe amd64 pigz amd64 2.4-1 [57.4 kB]
Get:2 http://archive.ubuntu.com/ubuntu bionic/universe amd64 aufs-tools amd64 1:4.9+20170918-1ubuntu1 [104 kB]
Get:3 https://download.docker.com/linux/ubuntu bionic/stable amd64 containerd.io amd64 1.2.13-1 [20.1 MB]
Get:4 http://archive.ubuntu.com/ubuntu bionic/universe amd64 cgroupfs-mount all 1.4 [6,320 B]
Get:5 http://archive.ubuntu.com/ubuntu bionic/main amd64 libltdl7 amd64 2.4.6-2 [38.8 kB]
Get:6 https://download.docker.com/linux/ubuntu bionic/stable amd64 docker-ce-cli amd64 5:19.03.6~3-0~ubuntu-bionic [42.5 MB]
Get:7 https://download.docker.com/linux/ubuntu bionic/stable amd64 docker-ce amd64 5:19.03.6~3-0~ubuntu-bionic [22.9 MB]
Get:7 https://download.docker.com/linux/ubuntu bionic/stable amd64 docker-ce amd64 5:19.03.6~3-0~ubuntu-bionic [22.9 MB]
Fetched 73.4 MB in 19min 43s (62.0 kB/s)
(Reading database ... 68238 files and directories currently installed.)
Preparing to unpack .../0-linux-modules-extra-4.15.0-88-generic_4.15.0-88.88_amd64.deb ...
Unpacking linux-modules-extra-4.15.0-88-generic (4.15.0-88.88) over (4.15.0-88.88) ...
Selecting previously unselected package pigz.
Preparing to unpack .../1-pigz_2.4-1_amd64.deb ...
Unpacking pigz (2.4-1) ...
Selecting previously unselected package aufs-tools.
Preparing to unpack .../2-aufs-tools_1%3a4.9+20170918-1ubuntu1_amd64.deb ...
Unpacking aufs-tools (1:4.9+20170918-1ubuntu1) ...
Selecting previously unselected package cgroupfs-mount.
Preparing to unpack .../3-cgroupfs-mount_1.4_all.deb ...
Unpacking cgroupfs-mount (1.4) ...
Selecting previously unselected package containerd.io.
Preparing to unpack .../4-containerd.io_1.2.13-1_amd64.deb ...
Unpacking containerd.io (1.2.13-1) ...
Selecting previously unselected package docker-ce-cli.
Preparing to unpack .../5-docker-ce-cli_5%3a19.03.6~3-0~ubuntu-bionic_amd64.deb ...
Unpacking docker-ce-cli (5:19.03.6~3-0~ubuntu-bionic) ...
Selecting previously unselected package docker-ce.
Preparing to unpack .../6-docker-ce_5%3a19.03.6~3-0~ubuntu-bionic_amd64.deb ...
Unpacking docker-ce (5:19.03.6~3-0~ubuntu-bionic) ...
Selecting previously unselected package libltdl7:amd64.
Preparing to unpack .../7-libltdl7_2.4.6-2_amd64.deb ...
Unpacking libltdl7:amd64 (2.4.6-2) ...
Setting up aufs-tools (1:4.9+20170918-1ubuntu1) ...
Setting up linux-modules-extra-4.15.0-88-generic (4.15.0-88.88) ...
Setting up containerd.io (1.2.13-1) ...
Created symlink /etc/systemd/system/multi-user.target.wants/containerd.service → /lib/systemd/system/containerd.service.
Setting up cgroupfs-mount (1.4) ...
Setting up libltdl7:amd64 (2.4.6-2) ...
Setting up docker-ce-cli (5:19.03.6~3-0~ubuntu-bionic) ...
Setting up pigz (2.4-1) ...
Setting up docker-ce (5:19.03.6~3-0~ubuntu-bionic) ...
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /lib/systemd/system/docker.service.
Created symlink /etc/systemd/system/sockets.target.wants/docker.socket → /lib/systemd/system/docker.socket.
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Processing triggers for systemd (237-3ubuntu10.38) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for ureadahead (0.100.0-21) ...
Processing triggers for linux-image-4.15.0-88-generic (4.15.0-88.88) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-4.15.0-88-generic
I: The initramfs will attempt to resume from /dev/sda4
I: (UUID=c930ee23-9416-4e50-8959-d67def1b18fd)
I: Set the RESUME variable to override this.
/etc/kernel/postinst.d/x-grub-legacy-ec2:
Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Found kernel: /vmlinuz-4.15.0-88-generic
Found kernel: /vmlinuz-4.15.0-76-generic
Found kernel: /vmlinuz-4.15.0-88-generic
Found kernel: /vmlinuz-4.15.0-76-generic
Updating /boot/grub/menu.lst ... done

/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub‘
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-88-generic
Found initrd image: /boot/initrd.img-4.15.0-88-generic
Found linux image: /boot/vmlinuz-4.15.0-76-generic
Found initrd image: /boot/initrd.img-4.15.0-76-generic
done

 完成安装。