Added storage nodes for k3s

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

group_vars/k3s/vars.yml

@@ -3,7 +3,7 @@ db:
     user: "postgres"
   name: "k3s"
   user: "k3s"
-  password: "{{ vault.k3s.db.password }}"
+  password: "{{ vault.k3s.postgres.db.password }}"
   listen_address: "{{ k3s.db.ip }}"
 
 k3s:

host_vars/k3s-agent00.yml

@@ -3,7 +3,7 @@ ansible_user: "{{ user }}"
 ansible_host: 192.168.20.25
 ansible_port: 22
 ansible_ssh_private_key_file: "{{ pk_path }}"
-ansible_become_pass: "{{ vault.k3s.server01.sudo }}"
+ansible_become_pass: "{{ vault.k3s.agent00.sudo }}"
 
 host:
   hostname: "k3s-agent00"

host_vars/k3s-agent01.yml

@@ -3,7 +3,7 @@ ansible_user: "{{ user }}"
 ansible_host: 192.168.20.26
 ansible_port: 22
 ansible_ssh_private_key_file: "{{ pk_path }}"
-ansible_become_pass: "{{ vault.k3s.server01.sudo }}"
+ansible_become_pass: "{{ vault.k3s.agent01.sudo }}"
 
 host:
   hostname: "k3s-agent01"

host_vars/k3s-agent02.yml

@@ -3,7 +3,7 @@ ansible_user: "{{ user }}"
 ansible_host: 192.168.20.27
 ansible_port: 22
 ansible_ssh_private_key_file: "{{ pk_path }}"
-ansible_become_pass: "{{ vault.k3s.server01.sudo }}"
+ansible_become_pass: "{{ vault.k3s.agent02.sudo }}"
 
 host:
   hostname: "k3s-agent02"

host_vars/k3s-longhorn00.yml

@@ -0,0 +1,10 @@
+---
+ansible_user: "{{ user }}"
+ansible_host: 192.168.20.32
+ansible_port: 22
+ansible_ssh_private_key_file: "{{ pk_path }}"
+ansible_become_pass: "{{ vault.k3s.longhorn00.sudo }}"
+
+host:
+  hostname: "k3s-longhorn00"
+  ip: "{{ ansible_host }}"

host_vars/k3s-longhorn01.yml

@@ -0,0 +1,10 @@
+---
+ansible_user: "{{ user }}"
+ansible_host: 192.168.20.33
+ansible_port: 22
+ansible_ssh_private_key_file: "{{ pk_path }}"
+ansible_become_pass: "{{ vault.k3s.longhorn01.sudo }}"
+
+host:
+  hostname: "k3s-longhorn01"
+  ip: "{{ ansible_host }}"

host_vars/k3s-longhorn02.yml

@@ -0,0 +1,10 @@
+---
+ansible_user: "{{ user }}"
+ansible_host: 192.168.20.31
+ansible_port: 22
+ansible_ssh_private_key_file: "{{ pk_path }}"
+ansible_become_pass: "{{ vault.k3s.longhorn02.sudo }}"
+
+host:
+  hostname: "k3s-longhorn02"
+  ip: "{{ ansible_host }}"

host_vars/k3s-server02.yml

@@ -3,7 +3,7 @@ ansible_user: "{{ user }}"
 ansible_host: 192.168.20.30
 ansible_port: 22
 ansible_ssh_private_key_file: "{{ pk_path }}"
-ansible_become_pass: "{{ vault.k3s.server01.sudo }}"
+ansible_become_pass: "{{ vault.k3s.server02.sudo }}"
 
 host:
   hostname: "k3s-server02"

k3s-storage.yml

@@ -0,0 +1,31 @@
+- name: Set up storage
+  hosts: k3s_nodes
+  gather_facts: yes
+  vars_files:
+    - secrets.yml
+  pre_tasks:
+    - name: Get K3s token from the first server
+      when: host.ip == k3s.server.ips[0] and inventory_hostname in groups["k3s_server"]
+      slurp:
+        src: /var/lib/rancher/k3s/server/node-token
+      register: k3s_token
+      become: true
+
+    - name: Set fact on k3s.server.ips[0]
+      when: host.ip == k3s.server.ips[0] and inventory_hostname in groups["k3s_server"]
+      set_fact: k3s_token="{{ k3s_token['content'] | b64decode | trim }}"
+
+  roles:
+    - role: common
+      when: inventory_hostname in groups["k3s_storage"]
+      tags:
+        - common
+    - role: k3s_storage
+      when: inventory_hostname in groups["k3s_storage"]
+      k3s_token: "{{ hostvars[(hostvars | dict2items | map(attribute='value') | map('dict2items') | map('selectattr', 'key', 'match', 'host') | map('selectattr', 'value.ip', 'match', k3s.server.ips[0] ) | select() | first | items2dict).host.hostname].k3s_token }}"
+      tags:
+        - k3s_storage
+    - role: node_exporter
+      when: inventory_hostname in groups["k3s_storage"]
+      tags:
+        - node_exporter

production

@@ -10,6 +10,9 @@ k3s-server02
 k3s-agent00
 k3s-agent01
 k3s-agent02
+k3s-longhorn00
+k3s-longhorn01
+k3s-longhorn02
 
 [k3s_server]
 k3s-server00
@@ -21,6 +24,11 @@ k3s-agent00
 k3s-agent01
 k3s-agent02
 
+[k3s_storage]
+k3s-longhorn00
+k3s-longhorn01
+k3s-longhorn02
+
 [vm]
 k3s-agent00
 k3s-agent01
@@ -30,6 +38,9 @@ k3s-server01
 k3s-server02
 k3s-postgres
 k3s-loadbalancer
+k3s-longhorn00
+k3s-longhorn01
+k3s-longhorn02
 
 [k3s_nodes]
 k3s-server00
@@ -38,6 +49,9 @@ k3s-server02
 k3s-agent00
 k3s-agent01
 k3s-agent02
+k3s-longhorn00
+k3s-longhorn01
+k3s-longhorn02
 
 [db]
 k3s-postgres

roles/common/files/bash/bashrc

@@ -31,8 +31,7 @@ case "$TERM" in
 xterm* | rxvt*)
   PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
   ;;
-*)
-    ;;
+*) ;;
 esac
 
 if [ -x /usr/bin/dircolors ]; then

roles/common/tasks/bash.yml

@@ -1,9 +1,9 @@
 ---
 - name: Copy .bashrc
-  template:
+  ansible.builtin.template:
     src: files/bash/bashrc
     dest: "/home/{{ user }}/.bashrc"
     owner: "{{ user }}"
     group: "{{ user }}"
-    mode: 0644
-  become: yes
+    mode: "644"
+  become: true

roles/common/tasks/hostname.yml

@@ -5,10 +5,10 @@
   become: true
 
 - name: Update /etc/hosts to reflect the new hostname
-  lineinfile:
+  ansible.builtin.lineinfile:
     path: /etc/hosts
     regexp: '^127\.0\.1\.1'
     line: "127.0.1.1 {{ host.hostname }}"
     state: present
-    backup: yes
+    backup: true
   become: true

roles/common/tasks/main.yml

@@ -1,6 +1,11 @@
 ---
-- include_tasks: time.yml
-- include_tasks: hostname.yml
-- include_tasks: packages.yml
-- include_tasks: bash.yml
-- include_tasks: sshd.yml
+- name: Configure Time
+  ansible.builtin.include_tasks: time.yml
+- name: Configure Hostname
+  ansible.builtin.include_tasks: hostname.yml
+- name: Configure Packages
+  ansible.builtin.include_tasks: packages.yml
+- name: Configure Bash
+  ansible.builtin.include_tasks: bash.yml
+- name: Configure SSH
+  ansible.builtin.include_tasks: sshd.yml

roles/common/tasks/packages.yml

@@ -1,13 +1,13 @@
 ---
 - name: Update and upgrade packages
-  apt:
-    update_cache: yes
-    upgrade: yes
-    autoremove: yes
-  become: yes
+  ansible.builtin.apt:
+    update_cache: true
+    upgrade: true
+    autoremove: true
+  become: true
 
 - name: Install extra packages
-  apt:
+  ansible.builtin.apt:
     name: "{{ common_packages }}"
     state: present
-  become: yes
+  become: true

roles/common/tasks/sshd.yml

@@ -1,15 +1,15 @@
 ---
 - name: Copy sshd_config
-  template:
+  ansible.builtin.template:
     src: templates/ssh/sshd_config
     dest: /etc/ssh/sshd_config
-    mode: 0644
+    mode: "644"
   notify:
     - Restart sshd
-  become: yes
+  become: true
 
 - name: Copy pubkey
-  copy:
+  ansible.builtin.copy:
     content: "{{ pubkey }}"
     dest: "/home/{{ user }}/.ssh/authorized_keys"
     owner: "{{ user }}"

roles/common/templates/ssh/sshd_config

@@ -1,124 +1,18 @@
-#	$OpenBSD: sshd_config,v 1.103 2018/04/09 20:41:22 tj Exp $
-
-# This is the sshd server system-wide configuration file.  See
-# sshd_config(5) for more information.
-
-# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
-
-# The strategy used for options in the default sshd_config shipped with
-# OpenSSH is to specify options with their default value where
-# possible, but leave them commented.  Uncommented options override the
-# default value.
-
 Include /etc/ssh/sshd_config.d/*.conf
-
 Protocol 2
-#Port 22
-#AddressFamily any
-#ListenAddress 0.0.0.0
-#ListenAddress ::
-
-#HostKey /etc/ssh/ssh_host_rsa_key
-#HostKey /etc/ssh/ssh_host_ecdsa_key
-#HostKey /etc/ssh/ssh_host_ed25519_key
-
-# Ciphers and keying
-#RekeyLimit default none
-
-# Logging
-#SyslogFacility AUTH
-#LogLevel INFO
-
-# Authentication:
-
-#LoginGraceTime 2m
 PermitRootLogin no
-#StrictModes yes
 MaxAuthTries 3
-#MaxSessions 10
-
 PubkeyAuthentication yes
-
-# Expect .ssh/authorized_keys2 to be disregarded by default in future.
-#AuthorizedKeysFile	.ssh/authorized_keys .ssh/authorized_keys2
-
-#AuthorizedPrincipalsFile none
-
-#AuthorizedKeysCommand none
-#AuthorizedKeysCommandUser nobody
-
-# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
-#HostbasedAuthentication no
-# Change to yes if you don't trust ~/.ssh/known_hosts for
-# HostbasedAuthentication
-#IgnoreUserKnownHosts no
-# Don't read the user's ~/.rhosts and ~/.shosts files
-#IgnoreRhosts yes
-
-# To disable tunneled clear text passwords, change to no here!
 PasswordAuthentication no
 PermitEmptyPasswords no
-
-# Change to yes to enable challenge-response passwords (beware issues with
-# some PAM modules and threads)
 ChallengeResponseAuthentication no
-
-# Kerberos options
-#KerberosAuthentication no
-#KerberosOrLocalPasswd yes
-#KerberosTicketCleanup yes
-#KerberosGetAFSToken no
-
-# GSSAPI options
-#GSSAPIAuthentication no
-#GSSAPICleanupCredentials yes
-#GSSAPIStrictAcceptorCheck yes
-#GSSAPIKeyExchange no
-
-# Set this to 'yes' to enable PAM authentication, account processing,
-# and session processing. If this is enabled, PAM authentication will
-# be allowed through the ChallengeResponseAuthentication and
-# PasswordAuthentication.  Depending on your PAM configuration,
-# PAM authentication via ChallengeResponseAuthentication may bypass
-# the setting of "PermitRootLogin without-password".
-# If you just want the PAM account and session checks to run without
-# PAM authentication, then enable this but set PasswordAuthentication
-# and ChallengeResponseAuthentication to 'no'.
 UsePAM yes
-
 AllowAgentForwarding no
 AllowTcpForwarding no
-#GatewayPorts no
 X11Forwarding no
-#X11DisplayOffset 10
-#X11UseLocalhost yes
-#PermitTTY yes
 PrintMotd no
-#PrintLastLog yes
 TCPKeepAlive no
-#PermitUserEnvironment no
-#Compression delayed
-#ClientAliveInterval 0
 ClientAliveCountMax 2
 UseDNS yes
-#PidFile /var/run/sshd.pid
-#MaxStartups 10:30:100
-#PermitTunnel no
-#ChrootDirectory none
-#VersionAddendum none
-
-# no default banner path
-#Banner none
-
-# Allow client to pass locale environment variables
 AcceptEnv LANG LC_*
-
-# override default of no subsystems
 Subsystem	sftp	/usr/lib/openssh/sftp-server
-
-# Example of overriding settings on a per-user basis
-#Match User anoncvs
-#	X11Forwarding no
-#	AllowTcpForwarding no
-#	PermitTTY no
-#	ForceCommand cvs server

roles/k3s_server/tasks/installation.yml

@@ -1,6 +1,6 @@
 ---
 - name: See if k3s file exists
-  stat:
+  ansible.builtin.stat:
     path: /usr/local/bin/k3s
   register: k3s_status
 
@@ -13,7 +13,7 @@
 
 - name: Install K3s server with node taint and TLS SAN
   when: (host.ip == k3s.server.ips[0] and (not k3s_status.stat.exists))
-  command: |
+  ansible.builtin.command: |
     /tmp/k3s_install.sh server \
     --node-taint CriticalAddonsOnly=true:NoExecute \
     --tls-san {{ k3s.loadbalancer.ip }}
@@ -43,11 +43,11 @@
 
 - name: Set fact on k3s.server.ips[0]
   when: host.ip == k3s.server.ips[0]
-  set_fact: k3s_token="{{ k3s_token['content'] | b64decode | trim }}"
+  ansible.builtin.set_fact: k3s_token="{{ k3s_token['content'] | b64decode | trim }}"
 
 - name: Install K3s on the secondary servers
   when: (host.ip != k3s.server.ips[0] and (not k3s_status.stat.exists))
-  command: |
+  ansible.builtin.command: |
     /tmp/k3s_install.sh server \
     --node-taint CriticalAddonsOnly=true:NoExecute \
     --tls-san {{ k3s.loadbalancer.ip }}

roles/k3s_storage/handlers/main.yml

@@ -0,0 +1,6 @@
+---
+- name: Restart k3s
+  service:
+    name: k3s
+    state: restarted
+  become: yes

roles/k3s_storage/tasks/installation.yml

@@ -0,0 +1,22 @@
+---
+- name: See if k3s file exists
+  ansible.builtin.stat:
+    path: /usr/local/bin/k3s
+  register: k3s_status
+
+- name: Download K3s install script to /tmp/
+  when: not k3s_status.stat.exists
+  ansible.builtin.get_url:
+    url: https://get.k3s.io
+    dest: /tmp/k3s_install.sh
+    mode: "0755"
+
+- name: Install K3s on the secondary servers with longhorn affinity
+  when: not k3s_status.stat.exists
+  ansible.builtin.command: |
+    /tmp/k3s_install.sh \
+    --node-label longhorn=true
+  environment:
+    K3S_URL: "https://{{ k3s.loadbalancer.ip }}:{{ k3s.loadbalancer.default_port }}"
+    K3S_TOKEN: "{{ k3s_token }}"
+  become: true

roles/k3s_storage/tasks/main.yml

@@ -0,0 +1,2 @@
+---
+- include_tasks: installation.yml

scripts/create_secret_skeleton.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-ansible-vault view secrets.yml | sed "s/: \w\+$/: ......../g" >>secrets.yml.skeleton
+ansible-vault view secrets.yml | sed "s/: [a-zA-Z0-9!\"]\+/: ......../" >secrets.yml.skeleton

secrets.yml.skeleton

@@ -1,4 +1,20 @@
 vault:
   k3s:
-    server:
+    server00:
       sudo: ........
+    server01:
+      sudo: ........
+    server02:
+      sudo: ........
+    agent00:
+      sudo: ........
+    agent01:
+      sudo: ........
+    agent02:
+      sudo: ........
+    loadbalancer:
+      sudo: ........
+    postgres:
+      sudo: ........
+      db:
+        password: ........