TipsOnKubesprayDind

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Reference

Refers to :

https://github.com/kubernetes-sigs/kubespray/tree/master/contrib/dind

Tips

Use custom docker images:

# sudo docker pull ubuntu:16.04
# sudo docker run -it ubuntu:16.04 /bin/bash
root@d962689eb1ad:/etc/apt/apt.conf.d# echo>docker-clean
# docker commit  d962689eb1ad ubuntu:own

Thus the docker clean won’t take effect, we could save all of the pkgs.

Modify the images:

$ pwd
/home/vagrant/kubespray-2.8.1/contrib/dind
$ vim ./group_vars/all/distro.yaml
    image: "ubuntu:own"

now follow the official guideline, be sure you modify the docker’s definition.

# vim roles/kubespray-defaults/defaults/main.yaml
  {%- if docker_version is version('17.05', '<') %}
  --graph={{ docker_daemon_graph }} {{ docker_log_opts }}
  {%- else %}
  --graph={{ docker_daemon_graph }} {{ docker_log_opts }}
  {%- endif %}

!!!But!!!, this will break the right logic of the kubespray itself.

Command:

cd contrib/dind
ansible-playbook -i hosts dind-cluster.yaml --extra-vars node_distro=ubuntu

cd ../..
CONFIG_FILE=inventory/local-dind/hosts.ini /tmp/kubespray.dind.inventory_builder.sh
ansible-playbook --become -e ansible_ssh_user=ubuntu -i inventory/local-dind/hosts.ini cluster.yml --extra-vars @contrib/dind/kubespray-dind.yaml --extra-vars bootstrap_os=ubuntu

Meaning

The meaning of using dind for kubespray is: we could quickly get the offline packages and docker images when kubespray release upgrades.