add loki role and fix linter errors

roles/loki/molecule/default/converge.yml

@@ -0,0 +1,5 @@
+---
+- name: Converge
+  hosts: all
+  roles:
+    - role: genlab.common.loki

roles/loki/molecule/default/molecule.yml

@@ -0,0 +1,22 @@
+---
+dependency:
+  name: galaxy
+driver:
+  name: docker
+platforms:
+  - name: ubuntu
+    image: geerlingguy/docker-ubuntu2204-ansible:latest
+    pre_build_image: true
+    command: ${MOLECULE_DOCKER_COMMAND:-""}
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:rw
+    cgroupns_mode: host
+    privileged: true
+provisioner:
+  name: ansible
+verifier:
+  name: ansible
+lint: |
+  set -e
+  yamllint .
+  ansible-lint .

roles/loki/molecule/default/verify.yml

@@ -0,0 +1,33 @@
+---
+- name: Verify
+  hosts: all
+  gather_facts: false
+  any_errors_fatal: true
+  tasks:
+    # https://github.com/ansible/molecule/issues/3587#issuecomment-1158650179
+    - name: "Include default vars"
+      ansible.builtin.include_vars:
+        dir: "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/defaults/"
+        extensions: ['yml']
+
+    - name: "Sanity check the Loki daemon"
+      retries: 5
+      delay: 1
+      register: loki_this
+      failed_when: "loki_version not in loki_this.content"
+      ansible.builtin.uri:
+        url: "http://localhost:{{ loki_port }}/metrics"
+        return_content: true
+
+    - name: "Ensure that locgli is installed and able to run"
+      register: loki_logcli
+      failed_when: loki_logcli.rc != 0
+      changed_when: false
+      ansible.builtin.command:
+        cmd: logcli --version
+
+    - name: "Check logcli version"
+      ansible.builtin.assert:
+        that: "'version {{ loki_version }}' in loki_logcli.stderr"
+        success_msg: "logcli version {{ loki_version }} is installed and working"
+        fail_msg: "logcli version {{ loki_version }} is not installed or not working correctly"