好的，下面是将上述操作转换为Ansible Roles的步骤：

1. 创建roles

首先，在您的Ansible项目中创建一个名为“mysql”的role：

   ansible-galaxy init mysql

1. 编写vars/main.yml文件

在这个文件中，定义我们在部署MySQL服务时需要使用的变量。例如：

    ---
    nfs_server: 192.168.0.173
    nfs_path: /path/to/nfs/directory
    mysql_root_password: password 

1. 编写tasks/main.yml文件

在这个文件中，编写用于创建PV和PVC对象、ConfigMap对象、Deployment对象以及Service对象的任务。例如：

    ---
    - name: Create PV and PVC objects for MySQL storage
      k8s:
        state: present
        definition:
          kind: PersistentVolumeClaim
          apiVersion: v1
          metadata:
            name: nfs-pvc 
          spec:
            accessModes:
              - ReadWriteMany 
            resources:
              requests:
                storage: 10Gi        
                
    - name: Create ConfigMap object for MySQL server configuration file
      k8s:
        state: present
        definition:
          apiVersion: v1
          kind: ConfigMap
          metadata:
            name: mysql-config 
          data:
            my.cnf: |
              [mysqld]
              datadir=/var/lib/mysql/
              socket=/var/run/mysqld/mysqld.sock   
              bind-address=0.0.0.0    
              sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES         
              [client]
              user=root
              password={{ mysql_root_password }} 
              
    - name: Create Deployment object for MySQL server
      k8s:
        state: present
        definition:
          apiVersion: apps/v1
          kind: Deployment
          metadata:
            name: mysql-deployment 
            labels:
              app: mysql-app  
          spec:
            selector:
              matchLabels:
                app: mysql-app    
            strategy:
              type: Recreate         
            template:
              metadata:
                labels:
                  app: mysql-app       
              spec:
                containers:
                  - name: mysql-container                 
                    imagePullPolicy: IfNotPresent             
                    image: mysql               
                    envFrom:
                      - configMapRef:
                          name : mysql-config   
                    ports:
                      - containerPort: 3306
                        name: mysql-port                  
                    volumeMounts:
                      - name: mysql-persistent-storage  
                        mountPath: /var/lib/mysql          
                volumes:
                  - name: mysql-persistent-storage      
                    persistentVolumeClaim:
                      claimName: nfs-pvc            
                      
    - name: Create Service object for MySQL server
      k8s_service_info:
        namespace=default 
        service_name=mysql-service 
        service_type=ClusterIP 
        port=3306 
        target_port=3306     

1. 编写templates/pv.yaml.j2文件

在这个Jinja2模板文件中，定义用于创建PV对象的YAML内容。例如：

    apiVersion: v1
    kind: PersistentVolume
    metadata:
      name: nfs-pv
    spec:
      capacity:
        storage: 10Gi        
      accessModes:
        - ReadWriteMany   
      persistentVolumeReclaimPolicy: Retain  
      mountOptions:
        - hard          
        - nfsvers=4.1    
      nfs:
        path: {{ nfs_path }} 
        server: {{ nfs_server }}

1. 编写templates/pvc.yaml.j2文件

在这个Jinja2模板文件中，定义用于创建PVC对象的YAML内容。例如：

    apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      name: nfs-pvc 
    spec:
      accessModes:
        - ReadWriteMany   
      resources:
        requests:
          storage: 10Gi        

1. 编写templates/configmap.yaml.j2文件

在这个Jinja2模板文件中，定义用于创建ConfigMap对象的YAML内容。例如：

    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: mysql-config 
    data:
      my.cnf: |
        [mysqld]
        datadir=/var/lib/mysql/
        socket=/var/run/mysqld/mysqld.sock   
        bind-address=0.0.0.0    
        sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES         
        [client]
        user=root
        password={{ mysql_root_password }} 

1. 编写templates/deployment.yaml.j2文件

在这个Jinja2模板文件中，定义用于创建Deployment对象的YAML内容。其中需要使用上面的3个模板变量：nfs_server、nfs_path、mysql_root_password。

1. 编写templates/service.yaml.j2文件

在这个Jinja2模板文件中，定义用于创建Service对象的YAML内容。

1. 完成roles/mysql/tasks/main.yml任务列表

在roles/mysql/tasks/main.yml文件中，包含了所有的任务：

---
- name: Include k8s_service_info module
  include_vars:
    file: "{{ playbook_dir }}/vars/k8s_auth_info.yml"
- name: Create PV object for MySQL storage
  k8s:
    state: present
    src: pv.yaml.j2
- name: Create PVC object for MySQL storage
  k8s:
    state: present
    src: pvc.yaml.j2
- name: Create ConfigMap object for MySQL server configuration file
  k8s:
    state: present
    src: configmap.yaml.j2
- name: Create Deployment object for MySQL server
  k8s:
    state: present
    src: deployment.yaml.j2
- name: Create Service object for MySQL server
  k8s_service_info:
    namespace: "{{ k8s_namespace }}"
    service_name : mysql-service 
    service_type : ClusterIP 
    port : "3306" 
    target_port : "3306"

1. 测试MySQL服务部署

最后，使用以下命令测试Ansible Role是否能够成功部署MySQL服务：

   ansible-playbook -i inventory.ini deploy_mysql.yml --ask-become-pass 

以上就是将上述操作转换为Ansible Roles的步骤。