Alexander
55 lines
2.1 KiB
Org Mode
55 lines
2.1 KiB
Org Mode
#+title: musicfs
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* Incus server VM
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~musicfs-server~ (gRPC) runs inside an Incus VM, live-sharing the host's
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~~/Music~ as a readonly virtiofs mount. =scripts/vm.sh= builds the binary on the
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host, bundles its nix ~glibc~ so it runs unmodified in the VM, ships it in, and
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runs it under systemd.
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** Setup
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#+begin_src bash
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devenv shell # cargo, incus, patchelf, grpcurl
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scripts/vm.sh up # create VM, share ~/Music, build, ship, start server
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#+end_src
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Options (env): =VM_NAME=, =IMAGE=, =MUSIC_SOURCE=, =LISTEN_PORT=, =RUST_LOG=.
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| Command | Action |
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|--------------------------+-------------------------------|
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| =scripts/vm.sh up= | create + build + ship + start |
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| =scripts/vm.sh redeploy= | rebuild after a code change |
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| =scripts/vm.sh logs= | tail server logs |
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| =scripts/vm.sh status= | VM + service status |
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| =scripts/vm.sh shell= | shell inside the VM |
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| =scripts/vm.sh down= | stop the VM |
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| =scripts/vm.sh destroy= | delete the VM |
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** Test it (Nushell)
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#+begin_src nushell
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let VMIP = (incus list musicfs -f csv -c 4 | lines | first | split row " " | first)
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let ADDR = $"($VMIP):50051"
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# liveness
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^nc -z -w 3 $VMIP 50051
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if $env.LAST_EXIT_CODE == 0 { print "alive" } else { print "dead" }
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# gRPC: stream the manifest, count entries
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grpcurl -plaintext -import-path proto -proto musicfs.proto -d "{}" $ADDR musicfs.MusicFs/GetManifest | lines | find relPath | length
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# files the server scans
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incus exec musicfs -- find /music -type f | lines | length
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# play a track straight out of the VM's shared /music
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incus exec musicfs -- cat "/music/DDT/ДДТ - Творчество в пустоте – 2 - 01 Intro.flac" | ^mpv -
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#+end_src
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Reach the server at the VM's bridge IP (=scripts/vm.sh status= prints it).
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Install mpv with =nix profile install nixpkgs#mpv=, or use =^ffplay -= instead.
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In Nushell, always put =| lines= between an external command's stdout and a
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builtin (=find=, =first=, =length=, ...); external-to-external pipes (=cat |
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mpv=) are byte-stable and don't need it.
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