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spinifex/.github/scripts/hypervisor-disk-preflight.sh
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Ben Duncan 8e5680f77f fix(e2e): harden nightly e2e against seven false-red signatures; release auto-assigned IP before stopped (#1381)
* fix(vm): release an auto-assigned public IP before a stop publishes stopped

* fix(e2e): skip a TryReady caller once the suite's SSH datapath is marked broken

* fix(e2e): skip a catalog entry whose third-party mirror is unreachable, still fail on a non-2xx

* fix(e2e): retry the diskperf fio install with backoff before calling it an infra fault

* fix(e2e): make the storagefault root-load check observe the load it started

* fix(ci): give the single suite a 40m budget and the nightly cells that run it 60m

* fix(ci): fail a nightly cell fast when a hypervisor it provisions on is out of disk
2026-11-01 01:49:27 -05:00

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#!/usr/bin/env bash
# Usage: hypervisor-disk-preflight.sh <env.tfvars>
#
# Fails fast when a hypervisor named in the tofu env is short of disk, before
# `tofu apply` tries to define a domain there. libvirt writes each domain's XML
# under /etc/libvirt/qemu on the root filesystem and its disks into the pool, and
# a full one fails the apply minutes in as "Domain Creation Failed".
#
# Hosts are reached the way the libvirt provider reaches them (ssh <user>@<name>,
# resolved through ~/.ssh/config). A host that cannot be reached is reported and
# skipped: tofu's own error for it is clearer than anything said here.
#
# Env: HV_SSH_USER (tf-user), HV_MIN_ROOT_FREE_MB (1024), HV_MIN_POOL_FREE_GB (20).
set -uo pipefail
tfvars="${1:?usage: $0 <env.tfvars>}"
user="${HV_SSH_USER:-tf-user}"
min_root_kb=$(( ${HV_MIN_ROOT_FREE_MB:-1024} * 1024 ))
min_pool_kb=$(( ${HV_MIN_POOL_FREE_GB:-20} * 1024 * 1024 ))
if [ ! -r "$tfvars" ]; then
echo "::error::hypervisor disk preflight: cannot read $tfvars" >&2
exit 1
fi
# One node per line in every env file: { name = "...", ..., storage_pool = "..." }.
pairs=$(grep -v '^[[:space:]]*#' "$tfvars" |
sed -nE 's/.*name[[:space:]]*=[[:space:]]*"([^"]+)".*storage_pool[[:space:]]*=[[:space:]]*"([^"]+)".*/\1 \2/p')
if [ -z "$pairs" ]; then
echo "::warning::hypervisor disk preflight: no nodes with a storage_pool in $tfvars; nothing checked"
exit 0
fi
# Prints "<root-avail-kb> <pool-avail-kb> <pool-path>" for the pool named in $1.
# shellcheck disable=SC2016 # expanded on the hypervisor, not here
remote='set -u
root=$(df -Pk /etc/libvirt/qemu | awk "NR==2{print \$4}")
path=$(virsh -c qemu:///system pool-dumpxml "$1" 2>/dev/null | sed -n "s:.*<path>\(.*\)</path>.*:\1:p" | head -n1)
pool=-
[ -n "$path" ] && pool=$(df -Pk "$path" | awk "NR==2{print \$4}")
echo "$root $pool ${path:--}"'
fail=0
while read -r host pool; do
[ -n "$host" ] || continue
if ! out=$(ssh -o BatchMode=yes -o ConnectTimeout=10 "${user}@${host}" bash -s -- "$pool" <<<"$remote" 2>&1); then
echo "::warning::hypervisor disk preflight: cannot reach $host ($out); its disk is unchecked"
continue
fi
read -r root_kb pool_kb pool_path <<<"$(tail -n1 <<<"$out")"
if ! [[ "$root_kb" =~ ^[0-9]+$ ]]; then
echo "::warning::hypervisor disk preflight: unexpected answer from $host: $out"
continue
fi
echo "$host: root fs $((root_kb / 1024)) MiB free; pool $pool ($pool_path) $([[ "$pool_kb" =~ ^[0-9]+$ ]] && echo "$((pool_kb / 1024 / 1024)) GiB free" || echo "not found")"
if [ "$root_kb" -lt "$min_root_kb" ]; then
echo "::error::hypervisor $host has $((root_kb / 1024)) MiB free on the filesystem holding /etc/libvirt/qemu (need ${HV_MIN_ROOT_FREE_MB:-1024} MiB): libvirt cannot write a domain definition there. Free space on $host before re-running." >&2
fail=1
fi
if [[ "$pool_kb" =~ ^[0-9]+$ ]] && [ "$pool_kb" -lt "$min_pool_kb" ]; then
echo "::error::hypervisor $host has $((pool_kb / 1024 / 1024)) GiB free in storage pool $pool at $pool_path (need ${HV_MIN_POOL_FREE_GB:-20} GiB): the node's disk cannot grow. Free space on $host before re-running." >&2
fail=1
fi
done <<<"$pairs"
exit "$fail"