From 4ee8043bb86cce024671c1f16579c672f8b6f8ad Mon Sep 17 00:00:00 2001
From: kjuulh <contact@kjuulh.io>
Date: Sat, 19 Feb 2022 21:22:14 +0100
Subject: [PATCH] Add k3s to ansible

---
 .../roles/k3s/master/defaults/main.yml        |  2 +
 .../ansible/roles/k3s/master/tasks/main.yml   | 78 +++++++++++++++++++
 .../roles/k3s/master/templates/k3s.service.j2 | 24 ++++++
 .../create-resources/ansible/site.yml         |  9 +--
 4 files changed, 108 insertions(+), 5 deletions(-)
 create mode 100644 infrastructure/create-resources/ansible/roles/k3s/master/defaults/main.yml
 create mode 100644 infrastructure/create-resources/ansible/roles/k3s/master/tasks/main.yml
 create mode 100644 infrastructure/create-resources/ansible/roles/k3s/master/templates/k3s.service.j2

diff --git a/infrastructure/create-resources/ansible/roles/k3s/master/defaults/main.yml b/infrastructure/create-resources/ansible/roles/k3s/master/defaults/main.yml
new file mode 100644
index 0000000..c56778f
--- /dev/null
+++ b/infrastructure/create-resources/ansible/roles/k3s/master/defaults/main.yml
@@ -0,0 +1,2 @@
+---
+k3s_server_location: /var/lib/rancher/k3s
diff --git a/infrastructure/create-resources/ansible/roles/k3s/master/tasks/main.yml b/infrastructure/create-resources/ansible/roles/k3s/master/tasks/main.yml
new file mode 100644
index 0000000..6fd0cd0
--- /dev/null
+++ b/infrastructure/create-resources/ansible/roles/k3s/master/tasks/main.yml
@@ -0,0 +1,78 @@
+---
+- name: Copy K3s service file
+  register: k3s_service
+  template:
+    src: "k3s.service.j2"
+    dest: "{{ systemd_dir }}/k3s.service"
+    owner: root
+    group: root
+    mode: 0644
+
+- name: Enable and check K3s service
+  systemd:
+    name: k3s
+    daemon_reload: yes
+    state: restarted
+    enabled: yes
+
+- name: Wait for node-token
+  wait_for:
+    path: "{{ k3s_server_location }}/server/node-token"
+
+- name: Register node-token file access mode
+  stat:
+    path: "{{ k3s_server_location }}/server/node-token"
+  register: p
+
+- name: Change file access node-token
+  file:
+    path: "{{ k3s_server_location }}/server/node-token"
+    mode: "g+rx,o+rx"
+
+- name: Read node-token from master
+  slurp:
+    path: "{{ k3s_server_location }}/server/node-token"
+  register: node_token
+
+- name: Store Master node-token
+  set_fact:
+    token: "{{ node_token.content | b64decode | regex_replace('\n', '') }}"
+
+- name: Restore node-token file access
+  file:
+    path: "{{ k3s_server_location }}/server/node-token"
+    mode: "{{ p.stat.mode }}"
+
+- name: Create directory .kube
+  file:
+    path: ~{{ ansible_user }}/.kube
+    state: directory
+    owner: "{{ ansible_user }}"
+    mode: "u=rwx,g=rx,o="
+
+- name: Copy config file to user home directory
+  copy:
+    src: /etc/rancher/k3s/k3s.yaml
+    dest: ~{{ ansible_user }}/.kube/config
+    remote_src: yes
+    owner: "{{ ansible_user }}"
+    mode: "u=rw,g=,o="
+
+- name: Replace https://localhost:6443 by https://master-ip:6443
+  command: >-
+    k3s kubectl config set-cluster default
+      --server=https://{{ master_ip }}:6443
+      --kubeconfig ~{{ ansible_user }}/.kube/config
+  changed_when: true
+
+- name: Create kubectl symlink
+  file:
+    src: /usr/local/bin/k3s
+    dest: /usr/local/bin/kubectl
+    state: link
+
+- name: Create crictl symlink
+  file:
+    src: /usr/local/bin/k3s
+    dest: /usr/local/bin/crictl
+    state: link
diff --git a/infrastructure/create-resources/ansible/roles/k3s/master/templates/k3s.service.j2 b/infrastructure/create-resources/ansible/roles/k3s/master/templates/k3s.service.j2
new file mode 100644
index 0000000..ee560ae
--- /dev/null
+++ b/infrastructure/create-resources/ansible/roles/k3s/master/templates/k3s.service.j2
@@ -0,0 +1,24 @@
+[Unit]
+Description=Lightweight Kubernetes
+Documentation=https://k3s.io
+After=network-online.target
+
+[Service]
+Type=notify
+ExecStartPre=-/sbin/modprobe br_netfilter
+ExecStartPre=-/sbin/modprobe overlay
+ExecStart=/usr/local/bin/k3s server --data-dir {{ k3s_server_location }} {{ extra_server_args | default("") }}
+KillMode=process
+Delegate=yes
+# Having non-zero Limit*s causes performance problems due to accounting overhead
+# in the kernel. We recommend using cgroups to do container-local accounting.
+LimitNOFILE=1048576
+LimitNPROC=infinity
+LimitCORE=infinity
+TasksMax=infinity
+TimeoutStartSec=0
+Restart=always
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target
\ No newline at end of file
diff --git a/infrastructure/create-resources/ansible/site.yml b/infrastructure/create-resources/ansible/site.yml
index 85a77db..3880cd7 100644
--- a/infrastructure/create-resources/ansible/site.yml
+++ b/infrastructure/create-resources/ansible/site.yml
@@ -5,11 +5,10 @@
   roles:
     - role: prereq
     - role: download
-#- hosts: serverctl_master_hosts
-#  become: yes
-#  roles:
-#    - role: "./k3s/master"
-#
+- hosts: serverctl_master_hosts
+  become: yes
+  roles:
+    - role: "./k3s/master"
 #- hosts: serverctl_node_hosts
 #  become: yes
 #  roles: