Docker cheat sheet

Some useful docker tips and tricks

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Table of Contents

• Tips

  • Docker container access to host services
  • Install docker on Fedora version >= 32. Cgroup error

• Useful Images

  • Docker image with some useful network tools

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Tips

Docker container access to host services

From linux host you can access to host services (localhost:port service on host) within a docker container by using special ip 172.17.0.1:<samehostserviceport>

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Install docker on Fedora version >= 32. Cgroup error

Guide from https://poweruser.blog/how-to-install-docker-on-fedora-32-f2606c6934f1

• disable cgroups v2 via a kernel parameter:

  sudo grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"
  reboot
  

• disable selinux:

  • Edit the /etc/selinux/config file, run: sudo vi /etc/selinux/config

  • Set SELINUX to disabled: SELINUX=disabled

  • Save and close the file in vi/vim. Reboot the Linux system: sudo reboot

  • Follow this instruction to install docker: https://docs.docker.com/engine/install/fedora/

  • Follow this instruction for post-install: https://docs.docker.com/engine/install/linux-postinstall/

  • Install docker-compose

  sudo dnf -y install docker-compose
  

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Useful Images

Docker image with some useful network tools

https://hub.docker.com/r/praqma/network-multitool/