如何使用Ansible配置VMware vSAN集群的空间效率

前提准备 #

• 安装Ansible的VMware集合：ansible-galaxy collection install community.vmware
• 确保拥有vCenter Server和ESXi主机的管理权限
• 确认vSAN集群满足对应功能的版本/硬件要求（如重复数据删除、纠删码需vSAN企业版支持）

1. 配置重复数据删除与压缩 #

重复数据删除和压缩是vSAN基础空间优化特性，可通过vmware_vsan_cluster模块直接启用：

- name: 启用vSAN重复数据删除与压缩
  hosts: localhost
  gather_facts: no
  vars:
    vcenter_host: "vcenter.yourdomain.com"
    vcenter_user: "administrator@vsphere.local"
    vcenter_pass: "your-secure-password"
    target_cluster: "your-vsan-cluster"

  tasks:
    - name: 配置vSAN集群空间效率特性
      community.vmware.vmware_vsan_cluster:
        hostname: "{{ vcenter_host }}"
        username: "{{ vcenter_user }}"
        password: "{{ vcenter_pass }}"
        validate_certs: no
        cluster_name: "{{ target_cluster }}"
        vsan_enable: yes
        # 可选值：none（关闭）、dedup_only（仅去重）、dedup_compress（去重+压缩）
        dedupe_compression: "dedup_compress"
        state: present

2. 配置纠删码（RAID-5/RAID-6） #

纠删码通过减少冗余数据占比提升空间利用率，需配合存储策略配置，使用vmware_storage_policy模块实现：

注意：RAID-5需至少3个集群节点，RAID-6需至少4个集群节点

- name: 配置vSAN纠删码存储策略
  hosts: localhost
  gather_facts: no
  vars:
    vcenter_host: "vcenter.yourdomain.com"
    vcenter_user: "administrator@vsphere.local"
    vcenter_pass: "your-secure-password"
    policy_name: "vSAN-Erasure-Coding-Policy"

  tasks:
    - name: 创建/更新纠删码存储策略
      community.vmware.vmware_storage_policy:
        hostname: "{{ vcenter_host }}"
        username: "{{ vcenter_user }}"
        password: "{{ vcenter_pass }}"
        validate_certs: no
        policy_name: "{{ policy_name }}"
        policy_description: "使用RAID-5的vSAN空间效率策略"
        rules:
          - name: "hostFailuresToTolerate"
            value: 1  # RAID-5对应1，RAID-6对应2
          - name: "erasureCoding"
            value: "raid5"  # 可选raid5/raid6
          - name: "forceProvisioning"
            value: "true"
        state: present

配置完成后，可将该策略设为集群默认存储策略，或为特定虚拟机/磁盘绑定该策略。

3. 验证配置结果 #

使用vmware_vsan_info模块确认空间效率特性的启用状态：

- name: 验证vSAN空间效率配置
  hosts: localhost
  gather_facts: no
  vars:
    vcenter_host: "vcenter.yourdomain.com"
    vcenter_user: "administrator@vsphere.local"
    vcenter_pass: "your-secure-password"
    target_cluster: "your-vsan-cluster"

  tasks:
    - name: 获取vSAN集群信息
      community.vmware.vmware_vsan_info:
        hostname: "{{ vcenter_host }}"
        username: "{{ vcenter_user }}"
        password: "{{ vcenter_pass }}"
        validate_certs: no
        cluster_name: "{{ target_cluster }}"
      register: vsan_cluster_info

    - name: 输出去重压缩状态
      debug:
        msg: "重复数据删除与压缩状态: {{ vsan_cluster_info.vsan_cluster_info.dedupe_compression }}"

    - name: 输出已配置的存储策略信息
      debug:
        var: vsan_cluster_info.vsan_cluster_info.storage_policies

注意事项 #

• 启用重复数据删除与压缩后，vSAN会后台执行数据扫描，初始扫描可能占用一定集群资源
• 纠删码仅作用于vSAN容量层，缓存层仍采用镜像冗余机制
• 生产环境建议开启validate_certs: yes，并确保vCenter证书合法有效

内容的提问来源于stack exchange，提问作者Costales