refactor(k3s): streamline inventory and primary server IP handling

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

playbooks/k3s-agents.yml

@@ -1,17 +1,20 @@
 - name: Set up Agents
-  hosts: k3s_nodes
-  gather_facts: yes
+  hosts: k3s
+  gather_facts: true
+  vars:
+    k3s_primary_server_ip: "{{ groups['k3s_server'] | map('extract', hostvars, 'ansible_host') | list | first }}"
   pre_tasks:
     - name: Get K3s token from the first server
-      when: host.ip == k3s.server.ips[0] and inventory_hostname in groups["k3s_server"]
+      when: host.ip == k3s_primary_server_ip 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 }}"
+    - name: Set fact on k3s_primary_server_ip
+      when: host.ip == k3s_primary_server_ip and inventory_hostname in groups["k3s_server"]
+      set_fact:
+        k3s_token: "{{ k3s_token['content'] | b64decode | trim }}"
 
   roles:
     - role: common
@@ -20,7 +23,7 @@
         - common
     - role: k3s_agent
       when: inventory_hostname in groups["k3s_agent"]
-      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 }}"
+      k3s_token: "{{ hostvars[(hostvars | dict2items | map(attribute='value') | map('dict2items') | map('selectattr', 'key', 'match', 'host') | map('selectattr', 'value.ip', 'match', k3s_primary_server_ip ) | select() | first | items2dict).host.hostname].k3s_token }}"
       tags:
         - k3s_agent
     - role: node_exporter

playbooks/k3s-loadbalancer.yml

@@ -0,0 +1,17 @@
+---
+- name: Set up Servers
+  hosts: k3s
+  gather_facts: true
+  roles:
+    - role: common
+      tags:
+        - common
+      when: inventory_hostname in groups["k3s_loadbalancer"]
+    - role: k3s_loadbalancer
+      tags:
+        - k3s_loadbalancer
+      when: inventory_hostname in groups["k3s_loadbalancer"]
+    # - role: node_exporter
+    #   tags:
+    #     - node_exporter
+    #   when: inventory_hostname in groups["k3s_loadbalancer"]

playbooks/k3s-servers.yml

@@ -1,7 +1,7 @@
 ---
 - name: Set up Servers
-  hosts: k3s_server
-  gather_facts: yes
+  hosts: k3s
+  gather_facts: true
   roles:
     - role: common
       tags:
@@ -9,6 +9,7 @@
     - role: k3s_server
       tags:
         - k3s_server
+      when: inventory_hostname in groups["k3s_server"]
     - role: node_exporter
       tags:
         - node_exporter

playbooks/k3s-storage.yml

@@ -1,17 +1,20 @@
 - name: Set up storage
   hosts: k3s_nodes
   gather_facts: true
+  vars:
+    k3s_primary_server_ip: "{{ groups['k3s_server'] | map('extract', hostvars, 'ansible_host') | list | first }}"
   pre_tasks:
     - name: Get K3s token from the first server
-      when: host.ip == k3s.server.ips[0] and inventory_hostname in groups["k3s_server"]
+      when: host.ip == k3s_primary_server_ip 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 }}"
+    - name: Set fact on k3s_primary_server_ip
+      when: host.ip == k3s_primary_server_ip and inventory_hostname in groups["k3s_server"]
+      set_fact:
+        k3s_token: "{{ k3s_token['content'] | b64decode | trim }}"
 
   roles:
     - role: common
@@ -20,7 +23,7 @@
         - 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 }}"
+      k3s_token: "{{ hostvars[(hostvars | dict2items | map(attribute='value') | map('dict2items') | map('selectattr', 'key', 'match', 'host') | map('selectattr', 'value.ip', 'match', k3s_primary_server_ip ) | select() | first | items2dict).host.hostname].k3s_token }}"
       tags:
         - k3s_storage
     - role: node_exporter

playbooks/loadbalancer.yml

@@ -1,14 +0,0 @@
----
-- name: Set up Servers
-  hosts: loadbalancer
-  gather_facts: yes
-  roles:
-    - role: common
-      tags:
-        - common
-    - role: loadbalancer
-      tags:
-        - loadbalancer
-    - role: node_exporter
-      tags:
-        - node_exporter