Rock3/dev/install-docker-engineer-on-docker

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1.Install Docker Engine on Debian

0 Uninstall old versions

 sudo apt-get remove docker docker-engine docker.io containerd runc

1 Install using the repository.Update the apt package index and install packages to allow apt to use a repository over HTTPS:

 sudo apt-get update
 sudo apt-get install \
   ca-certificates \
   curl \
   gnupg \
   lsb-release

2 Add Docker’s official GPG key:

 sudo mkdir -p /etc/apt/keyrings
 curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

3 Use the following command to set up the repository:

 echo \
 "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
 $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

4 Install Docker Engine

 sudo apt-get update
 sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

Please note that you may meet this error log. Please ignore it.

# sudo apt-get check docker-ce docker-ce-cli containerd.io docker-compose-plugin
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem. 
root@rak-gateway:/home/rock# dpkg --configure -a
Setting up docker-ce (5:20.10.17~3-0~debian-buster) ...
Job for docker.service failed because the control process exited with error code.
See "systemctl status docker.service" and "journalctl -xe" for details.
invoke-rc.d: initscript docker, action "start" failed.
● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: activating (auto-restart) (Result: exit-code) since Thu 2022-07-14 07:32:13 UTC; 22ms ago
     Docs: https://docs.docker.com
  Process: 1735 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=1/FAILURE)
 Main PID: 1735 (code=exited, status=1/FAILURE)
dpkg: error processing package docker-ce (--configure):
 installed docker-ce package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 docker-ce

5 The docker installer uses iptables for nat. Unfortunately Debian uses nftables. You can convert the entries over to nftables or just setup Debian to use the legacy iptables.

 sudo update-alternatives --set iptables /usr/sbin/iptables-legacy
 sudo update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
 sudo service docker start

2 Test Docker

 sudo docker run hello-world

3 Check docker service status

 sudo systemctl status docker

And it shows this.

 ● docker.service - Docker Application Container Engine
  Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: e
  Active: active (running) since Thu 2022-07-14 15:24:57 UTC; 4min 48s ago
    Docs: https://docs.docker.com
Main PID: 5632 (dockerd)
   Tasks: 10
  Memory: 37.4M
  CGroup: /system.slice/docker.service
          └─5632 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/contain