Rodrigo Arias Mallo
1c15e77c83
Allows us to see which derivations are being built in realtime. It is a bit of a hack, but it seems to work. We simply look at the environment of the child processes of nix-daemon (usually bash) and then look for the $name variable which should hold the current derivation being built. Needs root to be able to read the environ file of the different nix-daemon processes as they are owned by the nixbld* users. See: https://discourse.nixos.org/t/query-ongoing-builds/23486 Reviewed-by: Aleix Boné <abonerib@bsc.es>
27 lines
778 B
Bash
Executable File
27 lines
778 B
Bash
Executable File
#!/bin/sh
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# Locate nix daemon pid
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nd=$(pgrep -o nix-daemon)
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# Locate children of nix-daemon
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pids1=$(tr ' ' '\n' < "/proc/$nd/task/$nd/children")
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# For each children, locate 2nd level children
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pids2=$(echo "$pids1" | xargs -I @ /bin/sh -c 'cat /proc/@/task/*/children' | tr ' ' '\n')
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cat <<EOF
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HTTP/1.1 200 OK
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Content-Type: text/plain; version=0.0.4; charset=utf-8; escaping=values
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# HELP nix_daemon_build Nix daemon derivation build state.
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# TYPE nix_daemon_build gauge
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EOF
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for pid in $pids2; do
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name=$(cat /proc/$pid/environ 2>/dev/null | tr '\0' '\n' | rg "^name=(.+)" - --replace '$1' | tr -dc ' [:alnum:]_\-\.')
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user=$(ps -o uname= -p "$pid")
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if [ -n "$name" -a -n "$user" ]; then
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printf 'nix_daemon_build{user="%s",name="%s"} 1\n' "$user" "$name"
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fi
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done
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