如何通过RHV REST API及其他方式向RHV虚拟机复制文件

Hey there! Let's walk through how to copy files into a VM hosted on RHV, starting with the preferred REST API method, then covering other reliable options that work well.

RHV doesn't have a direct API endpoint for file transfers into VMs, so the standard approach involves using a temporary disk as an intermediary. Here's the step-by-step breakdown:

• Step 1: Get your target VM's ID
  First, list all VMs to find the ID of the one you want to send files to:

  curl -X GET -u "admin@internal:your_password" "https://rhv-manager.example.com/ovirt-engine/api/vms" | grep -o '<id>[^<]*</id>' | head -n1
  

  Replace your_password and rhv-manager.example.com with your actual credentials and manager URL.

• Step 2: Create a temporary disk
  Create an XML file (e.g., temp_disk.xml) with disk details—adjust the size based on your file's size:

  <disk>
    <name>temp_upload_disk</name>
    <storage_domains>
      <storage_domain id="your_storage_domain_id"/>
    </storage_domains>
    <size>1073741824</size> <!-- 1GB; modify this to fit your file -->
    <format>raw</format>
    <interface>virtio</interface>
    <bootable>false</bootable>
  </disk>
  

  Then send a POST request to attach this disk to your VM:

  curl -X POST -u "admin@internal:your_password" -H "Content-Type: application/xml" -d @temp_disk.xml "https://rhv-manager.example.com/ovirt-engine/api/vms/{vm_id}/disks"
  

  Replace {vm_id} with the ID you got in Step 1, and your_storage_domain_id with your storage domain's ID.

• Step 3: Upload your file to the temporary disk
  Use the ovirt-imageio tool (included with RHV tools) to upload your file directly to the disk:

  ovirt-imageio upload --file /path/to/your/local/file --url https://rhv-manager.example.com/ovirt-engine/api/disks/{disk_id}/transfer --username admin@internal --password your_password
  

  You can get the {disk_id} from the response of the POST request in Step 2.

• Step 4: Access the file from the VM and clean up
  Log into your VM, mount the temporary disk (it'll show up as something like /dev/vdb), copy the file, then unmount the disk:

  mkdir /mnt/temp_disk
  mount /dev/vdb /mnt/temp_disk
  cp /mnt/temp_disk/your_file /target/path/in/vm
  umount /mnt/temp_disk
  

  Finally, delete the temporary disk via the RHV API or management portal to free up storage.

If the REST API approach feels too involved, these alternatives are just as reliable:

子方法1: RHV Console File Transfer #

• Open the RHV Management Portal, locate your target VM, and click the Console button to launch the VM's console.
• Look for the File Transfer option in the console's top menu (location varies slightly by RHV version).
• Select your local file, wait for the transfer to complete—files usually land in the VM's user desktop or /home directory (depends on the VM's OS).

子方法2: SSH/SCP Direct Transfer (if VM has network access) #

• Make sure your VM has an accessible IP address (either directly or via the RHV manager as a jump host).
• Use scp to send the file directly:

  # Direct connection
  scp /path/to/local/file vm_username@vm_ip:/target/path/in/vm
  
  # Via RHV manager as a jump host
  scp -o ProxyJump=rhv_admin@rhv_manager_ip /path/to/local/file vm_username@vm_ip:/target/path/in/vm
  

子方法3: Shared Storage (NFS/SMB) #

• Set up or use an existing shared storage (NFS or SMB) connected to your RHV environment.
• Mount the shared directory in your target VM:

  # NFS example
  mount rhv_storage_server:/nfs/share /mnt/shared
  
  # SMB example
  mount -t cifs //smb_server/share /mnt/shared -o username=smb_user,password=smb_pass
  

• Upload your file to the shared storage from your local machine, then copy it to the desired path inside the VM.

内容的提问来源于stack exchange，提问作者sourabh rawat