Longhorn 云原生容器分布式存储 - Python Client

内容来源于官方 Longhorn 1.1.2 英文技术手册。

系列

• Longhorn 是什么?
• Longhorn 云原生容器分布式存储 - 设计架构和概念
• Longhorn 云原生容器分布式存储 - 部署篇
• Longhorn 云原生容器分布式存储 - 券和节点
• Longhorn 云原生容器分布式存储 - K8S 资源配置示例
• Longhorn 云原生容器分布式存储 - 监控(Prometheus)
• Longhorn 云原生容器分布式存储 - 备份与恢复
• Longhorn 云原生容器分布式存储 - 高可用
• Longhorn 云原生容器分布式存储 - 支持 ReadWriteMany (RWX) 工作负载
• Longhorn 云原生容器分布式存储 - 定制部署默认设置
• Longhorn云原生容器分布式存储 - Air Gap 安装

目前，您可以使用 Longhorn UI 操作 Longhorn。同时，您可以使用 Python 访问 Longhorn API，如下所示。

1. 获取 Longhorn API 端点

   与 Longhorn 通信的一种方式是通过 longhorn-frontend service。

   如果您在安装 Longhorn 的同一集群中运行自动化/脚本(automation/scripting)工具，请连接到端点 http://longhorn-frontend.longhorn-system/v1

   如果您在本地机器上运行自动化/脚本(automation/scripting)工具，请使用 kubectl port-forward 将 longhorn-frontend service 转发到 localhost：

   kubectl port-forward services/longhorn-frontend 8080:http -n longhorn-system
   

   并连接到端点 http://localhost:8080/v1

2. 使用 Python Client

   将 longhorn.py 文件(包含 Python client)导入到以下 Python 脚本中，并从 API 端点创建一个 client：

   https://github.com/longhorn/longhorn-tests/blob/master/manager/integration/tests/longhorn.py

   import longhorn
   
   # If automation/scripting tool is inside the same cluster in which Longhorn is installed
   longhorn_url = 'http://longhorn-frontend.longhorn-system/v1'
   # If forwarding `longhorn-frontend` service to localhost
   longhorn_url = 'http://localhost:8080/v1'
   
   client = longhorn.Client(url=longhorn_url)
   
   # Volume operations
   # List all volumes
   volumes = client.list_volume()
   # Get volume by NAME/ID
   testvol1 = client.by_id_volume(id="testvol1")
   # Attach TESTVOL1
   testvol1 = testvol1.attach(hostId="worker-1")
   # Detach TESTVOL1
   testvol1.detach()
   # Create a snapshot of TESTVOL1 with NAME
   snapshot1 = testvol1.snapshotCreate(name="snapshot1")
   # Create a backup from a snapshot NAME
   testvol1.snapshotBackup(name=snapshot1.name)
   # Update the number of replicas of TESTVOL1
   testvol1.updateReplicaCount(replicaCount=2)
   # Find more examples in Longhorn integration tests https://github.com/longhorn/longhorn-tests/tree/master/manager/integration/tests
   
   # Node operations
   # List all nodes
   nodes = client.list_node()
   # Get node by NAME/ID
   node1 = client.by_id_node(id="worker-1")
   # Disable scheduling for NODE1
   client.update(node1, allowScheduling=False)
   # Enable scheduling for NODE1
   client.update(node1, allowScheduling=True)
   # Find more examples in Longhorn integration tests https://github.com/longhorn/longhorn-tests/tree/master/manager/integration/tests
   
   # Setting operations
   # List all settings
   settings = client.list_setting()
   # Get setting by NAME/ID
   backupTargetsetting = client.by_id_setting(id="backup-target")
   # Update a setting
   backupTargetsetting = client.update(backupTargetsetting, value="s3://backupbucket@us-east-1/")
   # Find more examples in Longhorn integration tests https://github.com/longhorn/longhorn-tests/tree/master/manager/integration/tests
   

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