Added database container and proved connectivity. Logic needs to be changed for HA.

.travis.yml

@@ -34,6 +34,10 @@ env:
     - MOLECULE_DISTRO: geerlingguy/docker-fedora31-ansible:latest
       MOLECULE_PLAYBOOK: playbook-no-deploy.yml
 
+    # Test multiple masters in control plane with PostgreSQL
+    - MOLECULE_DISTRO: geerlingguy/docker-centos8-ansible:latest
+      MOLECULE_PLAYBOOK: playbook-ha-postgres.yml
+
 install:
   # Install test dependencies.
   - pip install molecule docker jmespath

molecule/default/molecule.yml

@@ -34,6 +34,14 @@ platforms:
     pre_build_image: ${MOLECULE_PREBUILT:-true}
     networks:
       - name: k3snet
+  - name: database
+    image: postgres:11-alpine
+    pre_build_image: true
+    command: "postgres"
+    env:
+      POSTGRES_PASSWORD: "verybadpass"
+    networks:
+      - name: k3snet
 provisioner:
   name: ansible
   options:

molecule/default/playbook-docker-altport-wireguard.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook-docker.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook-download.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook-ha-postgres.yml

@@ -0,0 +1,13 @@
+---
+- name: Converge
+  hosts: node*
+  become: true
+  vars:
+    molecule_is_test: true
+    k3s_datastore_endpoint: "postgres://postgres:verybadpass@database:5432/postgres?sslmode=disable"
+  pre_tasks:
+    - name: Set each node to be a control node
+      set_fact:
+        k3s_control_node: true
+  roles:
+    - role: xanmanning.k3s

molecule/default/playbook-no-deploy.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook-restart-cluster.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook-start-cluster.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook-stop-cluster.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook-version.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/playbook.yml

@@ -1,6 +1,6 @@
 ---
 - name: Converge
-  hosts: all
+  hosts: node*
   become: true
   vars:
     molecule_is_test: true

molecule/default/prepare-rootless.yml

@@ -1,6 +1,6 @@
 ---
 - name: Prepare
-  hosts: all
+  hosts: node1
   become: true
   tasks:
     - name: Ensure a user group exists

molecule/default/prepare.yml

@@ -1,6 +1,6 @@
 ---
 - name: Prepare
-  hosts: all
+  hosts: node*
   tasks:
     - name: Debug Message
       debug:

tasks/validate/check-experimental-variables.yml

@@ -4,7 +4,7 @@
   assert:
     that:
       - k3s_use_experimental is defined and k3s_use_experimental
-      - k3s_dqlite_datastore is defined and k3s_use_experimental
     success_msg: "Experimental variables are defined and enabled."
     fail_msg: "Experimental variables have been configured. If you want to use them ensure you set k3s_use_experimental"
-  when: k3s_non_root is defined and k3s_non_root
+  when: (k3s_non_root is defined and k3s_non_root)
+        or (k3s_dqlite_datastore is defined and k3s_dqlite_datastore)

templates/k3s.service.j2

@@ -54,6 +54,9 @@ ExecStart={{ k3s_install_dir }}/k3s
     {% if k3s_cluster_domain is defined and k3s_cluster_domain != "cluster.local" %}
         --cluster-domain {{ k3s_cluster_domain }}
     {% endif %}
+    {% if k3s_datastore_endpoint is defined and k3s_datastore_endpoint %}
+        --datastore-endpoint "{{ k3s_datastore_endpoint }}"
+    {% endif %}
 {% else %}
     agent
     --server https://{{ k3s_control_node_address }}:{{ k3s_https_port }}