add karma role and fix lint errors

roles/karma/molecule/default/converge.yml

@@ -0,0 +1,9 @@
+---
+- name: Converge
+  hosts: all
+  gather_facts: true
+  become: true
+  roles:
+    - role: genlab.common.karma
+      karma_version: "0.121"
+      config_source_dir: molecule/default/

roles/karma/molecule/default/karma.conf

@@ -0,0 +1,17 @@
+alertmanager:
+  interval: 1m
+  servers:
+    - name: production
+      uri: http://localhost:9093
+      timeout: 20s
+      proxy: false
+      readonly: true
+listen:
+  address: "0.0.0.0"
+  port: 8080
+  prefix: /
+  tls:
+    cert: ""
+    key: ""
+  cors:
+    allowedOrigins: []

roles/karma/molecule/default/molecule.yml

@@ -0,0 +1,27 @@
+---
+dependency:
+  name: galaxy
+
+driver:
+  name: docker
+
+platforms:
+  - name: ubuntu
+    image: geerlingguy/docker-${MOLECULE_DISTRO:-ubuntu2404}-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/karma/molecule/default/verify.yml

@@ -0,0 +1,35 @@
+---
+- name: Verify
+  hosts: all
+  gather_facts: false
+  any_errors_fatal: true
+  vars:
+    karma_version: "0.121"
+
+  tasks:
+    - name: "Check if Karma is installed"
+      changed_when: false
+      ansible.builtin.command: "karma --version"
+      register: karma_installed_version
+
+    - name: "Check Karma version"
+      ansible.builtin.assert:
+        that: "karma_installed_version.stdout is regex('{{ karma_version }}')"
+        success_msg: "Karma version {{ karma_version }} is installed and working"
+        fail_msg: "Karma version {{ karma_version }} is not installed or not working correctly"
+
+    # kics-scan ignore-block
+    - name: "Check if Karma is reachable"
+      ansible.builtin.uri:
+        url: "http://localhost:8080/health"
+        return_content: true
+        status_code: 200
+        method: GET
+        body_format: json
+      register: karma_health
+
+    - name: "Assert Karma health status"
+      ansible.builtin.assert:
+        that: "karma_health.content.strip() == 'Pong'"
+        success_msg: "Karma is healthy"
+        fail_msg: "Karma is not healthy"