c12s-kubespray/contrib/dind/roles/dind-host/tasks/main.yaml
JuanJo Ciarlante 4077934519 [jjo] add DIND support to contrib/ (#3468)
* [jjo] add DIND support to contrib/

- add contrib/dind with ansible playbook to
  create "node" containers, and setup them to mimic
  host nodes as much as possible (using Ubuntu images),
  see contrib/dind/README.md

- nodes' /etc/hosts editing via `blockinfile` and
  `lineinfile` need `unsafe_writes: yes` because /etc/hosts
  are mounted by docker, and thus can't be handled atomically
  (modify copy + rename)

* dind-host role: set node container hostname on creation

* add "Resulting deployment" section with some CLI outputs

* typo

* selectable node_distro: debian, ubuntu

* some fixes for node_distro: ubuntu

* cpu optimization: add early `pkill -STOP agetty`

* typo

* add centos dind support ;)

* add kubespray-dind.yaml, support fedora

- add kubespray-dind.yaml (former custom.yaml at README.md)
- rework README.md as per above
- use some YAML power to share distros' commonality
- add fedora support

* create unique /etc/machine-id and other updates

- create unique /etc/machine-id in each docker node,
  used as seed for e.g. weave mac addresses

- with above, now netchecker 100% passes WoHooOO!
  🎉 🎉 🎉

- updated README.md output from (1.12.1, verified
  netcheck)

* minor typos

* fix centos node creation, needs earlier udevadm removal to avoid flaky facts, also verified netcheck Ok \o/

* add Q&D test-distros.sh, back to manual /etc/machine-id hack

* run-test-distros.sh cosmetics and minor fixes

* run-test-distros.sh: $rc fix and minor formatting changes

* run-test-distros.sh output cosmetics
2018-10-15 09:44:02 +02:00

86 lines
3.1 KiB
YAML

- name: set_fact distro_setup
set_fact:
distro_setup: "{{ distro_settings[node_distro] }}"
- name: set_fact other distro settings
set_fact:
distro_image: "{{ distro_setup['image'] }}"
distro_init: "{{ distro_setup['init'] }}"
distro_pid1_exe: "{{ distro_setup['pid1_exe'] }}"
distro_raw_setup: "{{ distro_setup['raw_setup'] }}"
distro_raw_setup_done: "{{ distro_setup['raw_setup_done'] }}"
distro_agetty_svc: "{{ distro_setup['agetty_svc'] }}"
- name: Create dind node containers from "containers" inventory section
docker_container:
image: "{{ distro_image }}"
name: "{{ item }}"
state: started
hostname: "{{ item }}"
command: "{{ distro_init }}"
#recreate: yes
privileged: true
tmpfs:
- /sys/module/nf_conntrack/parameters
volumes:
- /boot:/boot
- /lib/modules:/lib/modules
- "{{ item }}:/dind/docker"
register: containers
with_items: "{{groups.containers}}"
tags:
- addresses
- name: Gather list of containers IPs
set_fact:
addresses: "{{ containers.results | map(attribute='ansible_facts') | map(attribute='docker_container') | map(attribute='NetworkSettings') | map(attribute='IPAddress') | list }}"
tags:
- addresses
- name: Create inventory_builder helper already set with the list of node containers' IPs
template:
src: inventory_builder.sh.j2
dest: /tmp/kubespray.dind.inventory_builder.sh
mode: 0755
tags:
- addresses
- name: Install needed packages into node containers via raw, need to wait for possible systemd packages to finish installing
raw: |
# agetty processes churn a lot of cpu time failing on inexistent ttys, early STOP them, to rip them in below task
pkill -STOP agetty || true
{{ distro_raw_setup_done }} && echo SKIPPED && exit 0
until [ "$(readlink /proc/1/exe)" = "{{ distro_pid1_exe }}" ] ; do sleep 1; done
{{ distro_raw_setup }}
delegate_to: "{{ item._ansible_item_label }}"
with_items: "{{ containers.results }}"
register: result
changed_when: result.stdout.find("SKIPPED") < 0
- name: Remove gettys from node containers
raw: |
until test -S /var/run/dbus/system_bus_socket; do sleep 1; done
systemctl disable {{ distro_agetty_svc }}
systemctl stop {{ distro_agetty_svc }}
delegate_to: "{{ item._ansible_item_label }}"
with_items: "{{ containers.results }}"
changed_when: false
# Running systemd-machine-id-setup doesn't create a unique id for each node container on Debian,
# handle manually
- name: Re-create unique machine-id (as we may just get what comes in the docker image), needed by some CNIs for mac address seeding (notably weave)
raw: |
echo {{ item | hash('sha1') }} > /etc/machine-id.new
mv -b /etc/machine-id.new /etc/machine-id
cmp /etc/machine-id /etc/machine-id~ || true
systemctl daemon-reload
delegate_to: "{{ item._ansible_item_label }}"
with_items: "{{ containers.results }}"
- name: Early hack image install to adapt for DIND
raw: |
rm -fv /usr/bin/udevadm /usr/sbin/udevadm
delegate_to: "{{ item._ansible_item_label }}"
with_items: "{{ containers.results }}"
register: result
changed_when: result.stdout.find("removed") >= 0