mirror of
https://github.com/mulgadc/spinifex.git
synced 2026-10-15 17:11:30 +00:00
Julian Sommer
32 lines
1.5 KiB
Bash
Executable File
32 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# Prepare a runner to build a guest image with build-system-image.sh.
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#
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# Installs libguestfs + qemu-utils if they are missing and makes a host kernel
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# readable, so the libguestfs appliance can boot. Nothing here touches a host
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# block device: virt-customize works inside an isolated userspace appliance, so
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# this is safe on a shared runner.
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#
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# Callers must still export LIBGUESTFS_BACKEND=direct themselves — it has to be
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# set in the environment the build runs in, which is not this subshell.
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set -euo pipefail
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# Three nightly service cells share one ci-single runner and start together, so
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# concurrent apt-get runs are the normal case rather than the exception. Two of
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# them lost the lock outright before this guard existed. Skipping the install
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# when the tools are already present avoids most of the contention; the lock
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# timeout covers the rest, including apt runs started by anything else on the
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# box.
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if command -v virt-customize >/dev/null && command -v qemu-img >/dev/null; then
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echo "libguestfs-tools and qemu-utils already present"
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else
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APT_OPTS=(-o DPkg::Lock::Timeout=600)
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sudo apt-get "${APT_OPTS[@]}" update -qq
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sudo apt-get "${APT_OPTS[@]}" install -y --no-install-recommends \
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libguestfs-tools qemu-utils
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fi
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# Debian/Ubuntu ship /boot/vmlinuz-* mode 0600 and the appliance needs to read a
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# host kernel. Tolerated on failure: a runner whose kernel is already readable
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# has no vmlinuz to chmod under some images.
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sudo chmod 0644 /boot/vmlinuz-* || true
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