David Thompson <dthomps...@worcester.edu> skribis: > Ludovic Courtès <l...@gnu.org> writes: > >> Perhaps one addition eventually would be to allow IPs to be >> automatically allocated and have host name lookup DTRT in each VM. > > Do you have any idea how we could do that for local VMs? There's no > daemon managing the provision of these resources, so I don't know what > strategy can be used to automatically allocate static IPs.
QEMU allows you to specify the guest’s IP, I think, and apparently it can create VLANs and connect several unprivileged QEMU instances together via -net socket (info "(qemu-doc) sec_invocation"). Things like libvirt probably provide a higher-level interface to that. (I don’t know if it justifies the extra dependency.) > The automagic hostname lookup part is particularly interesting to me. A > more complete deployment configuration would have the web server > dependent on the db server. I originally intended to handle this by > delaying the creation of the web server until after the db server was > made, and invoking a procedure that accepted the db server's state as > input and output the correct configuration for the web server. I’ve seen that Docker can do that. ;-) IIRC it populates /etc/hosts in each container. That’s something we could do. Another possibility would be to rely on mDNS. > Thinking out loud here: Maybe 'guix deploy' can kick off the > provisioning for all machines first, and afterwards the OS configs can > be altered to include the correct /etc/hosts file. The transform procedure could force the right /etc/hosts in each OS, I suppose? Thanks, Ludo’.
