Use Vsock with Libzmq

Use Vsock with Libzmq(blog.remijouan.net)

48 points by remijouannet 6 days ago | 9 comments

dwrodri 3 days ago |

I could see this being really useful for people who need VM-Sandboxed software, but also need quick and dirty bridges between host/guest. Great contribution!

remijouannet 6 days ago |

hi, i’ve recently contributed to libzmq by adding AF_VSOCK. if anyone is playing around with it

touisteur 3 days ago | |

Been hoping for some time someone would write it better than my local ugly hack. This immediately useful. Thanks a bunch.

zoobab 3 days ago |

Preparing for the 10 years anniversary of Pieter Hintjens's disseapearance, the main author of Zeromq:

http://hintjens.com/blog:125

sthustfo 3 days ago |

What are the typical use cases for the Guest VM to talk to Hypervisor? I see 2 use cases mentioned on the Proxmox link (https://pve.proxmox.com/wiki/Qemu-guest-agent)

1. shutdown the guest 2. freeze the guest system during backup/snapshot

Just curious about other possible use cases.

donmcronald 3 days ago | |

I think it would be useful for backup testing. Lots of VM backup software will boot a restored VM and screenshot the login screen. That’s useless IMO because you could be screenshotting an outdated restore without realizing.

I think you could boot a network disconnected VM and communicate over vsock to assess the guest health. You’d need an agent in the VM, but I think it'd be worth it.

touisteur 3 days ago | |

Building micromvs with no network support helps with isolation and (more) kernel surface reduction.

remijouannet 3 days ago | |

aws is using it for aws nitro enclave, one of the use case for vsock is communication between guests on the same host

teravor 3 days ago | |

some VMMs just straight up translate vsock from the guest to UDS on the host.