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test(e2e/reboot): pad WAL > 4MB to force chunk upload (workaround for mulga-siv-122)

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viperblock's WriteWALToChunk(false) is a no-op when the WAL is under
4MB (viperblock.go:1647-1657), so small user-data writes (the unit
file + index.html, ~300 bytes total) sit in the on-host WAL and are
lost when the host reboots before the WAL hits the threshold.

Workaround: write 8MB of zeros at end of user-data + sync to push WAL
over the threshold so the unit-file write definitely lands in
predastore before the host reboot. Drop when upstream fix lands.

Mirrors the same workaround in the Go reboot test
(tests/e2e/reboot/reboot_test.go on feat/e2e-go-harness).
This commit is contained in:
joshsiv-mulga
2026-05-20 15:46:49 +10:00
parent 560558dd12
commit 6142949a49
1 changed files with 12 additions and 0 deletions
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tests/e2e/run-reboot-e2e.sh
+12
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@@ -285,6 +285,18 @@ WantedBy=multi-user.target
UNIT
systemctl daemon-reload
systemctl enable --now reboot-e2e-httpd.service
# Workaround for viperblock WAL <4MB skip-upload bug (mulga-siv-122):
# WriteWALToChunk(false) is a no-op when the WAL is under 4MB so small
# user-data writes (the unit file, index.html) sit in the on-host WAL
# and are lost when the host reboots before the WAL hits the threshold.
# Write 8MB of zeros + sync to push WAL over the threshold so the
# unit-file write definitely lands in predastore before the host reboot.
# Drop when upstream fix lands.
dd if=/dev/zero of=/var/lib/spinifex-e2e-pad bs=1M count=8 status=none
sync
rm -f /var/lib/spinifex-e2e-pad
sync
USERDATA
)
printf '%s' "$APP_USER_DATA" | put_to_node "$NODE_USERDATA_PATH"