forked from wrenn/wrenn
pptx704
3509ca90e8
Build phases: - Pre-build (apt update) and post-build (apt clean, autoremove, rm lists) run with 10-minute timeout; user recipe commands keep 30s timeout - Log entries include phase field for UI grouping - Always send explicit TimeoutSec to host agent (0 defaulted to 30s) Frontend: - Pre-build/post-build steps show phase label without exposing commands - Recipe steps numbered independently starting from 1 Guest PATH: - Add /usr/games:/usr/local/games to wrenn-init.sh PATH export (standard Ubuntu paths, needed for packages like cowsay)
44 lines
1.6 KiB
Bash
44 lines
1.6 KiB
Bash
#!/bin/sh
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# wrenn-init: minimal PID 1 init for Firecracker microVMs.
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# Mounts virtual filesystems, starts chronyd for time sync, then execs tini + envd.
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set -e
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# Mount essential virtual filesystems if not already mounted.
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mount -t proc proc /proc 2>/dev/null || true
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mount -t sysfs sysfs /sys 2>/dev/null || true
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mount -t devtmpfs devtmpfs /dev 2>/dev/null || true
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mkdir -p /dev/pts /dev/shm
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mount -t devpts devpts /dev/pts 2>/dev/null || true
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mount -t tmpfs tmpfs /dev/shm 2>/dev/null || true
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mount -t tmpfs tmpfs /tmp 2>/dev/null || true
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mount -t tmpfs tmpfs /run 2>/dev/null || true
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mkdir -p /sys/fs/cgroup
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mount -t cgroup2 cgroup2 /sys/fs/cgroup 2>/dev/null || true
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echo "+cpu +memory +io" > /sys/fs/cgroup/cgroup.subtree_control 2>/dev/null || true
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# Set hostname
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hostname sandbox
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# Configure DNS resolver.
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echo "nameserver 8.8.8.8" > /etc/resolv.conf
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echo "nameserver 8.8.4.4" >> /etc/resolv.conf
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# Set a standard PATH so envd and all child processes can find common binaries.
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export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
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# Write chrony config to sync time from the KVM PTP hardware clock.
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# /dev/ptp0 is a paravirtual clock exposed by KVM — no network required.
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mkdir -p /etc/chrony /run/chrony
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cat > /etc/chrony/chrony.conf <<EOF
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refclock PHC /dev/ptp0 poll 2 dpoll 2
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driftfile /run/chrony/chrony.drift
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makestep 1.0 -1
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EOF
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# Start chronyd in the background before handing off to tini.
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chronyd -f /etc/chrony/chrony.conf 2>/dev/null || true
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# Exec tini as PID 1 — it reaps zombie processes and forwards signals to envd.
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exec /sbin/tini -- /usr/local/bin/envd
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