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k8s-version-upgrade: fix two more grep-pipefail bugs

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Same `grep -v` / `set -o pipefail` interaction as commit 10b261d2,
in two more callsites the previous fix didn't cover:

  Line 354 (phase_master): control-plane Running check —
    `grep -v Running | wc -l` returns 1 when all pods are Running
    (the happy path), aborting the chain right after master upgrades.

  Line 419 (phase_postflight): on-target node check —
    `grep -v ":v$TARGET_VERSION$" | wc -l` returns 1 when all nodes
    are on the target version (the happy path, exactly when postflight
    should succeed). Aborts at the moment of victory.

Forensics on yesterday's master Job failure (see commit message of
10b261d2 for context): the master Job spawned 16s after the previous
fix's TF apply, before configmap propagation completed on the kubelet.
With those two latent bugs also looming, the chain would have died
post-master-upgrade and again at postflight even if propagation had
been timely.

Wrapping each grep in `{ ... || true; }` so a no-matches result
returns success.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Viktor Barzin 2026-05-20 20:59:10 +00:00
parent 10b261d2db
commit 0c8b46df55
1 changed files with 7 additions and 2 deletions
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9
stacks/k8s-version-upgrade/scripts/upgrade-step.sh
View file

@ -351,8 +351,10 @@ phase_master() {
|| { slack "ABORT — k8s-master not Ready or wrong version after upgrade"; exit 1; }
local not_ready
# `grep -v Running` returns 1 when all pods are Running (happy path);
# under `set -o pipefail` that aborts the script. Wrap in `|| true`.
not_ready=$($KUBECTL -n kube-system get pods -l 'tier=control-plane' --no-headers 2>/dev/null \
| grep -v Running | wc -l)
| { grep -v Running || true; } | wc -l)
if [ "$not_ready" -gt 0 ]; then
slack "ABORT — $not_ready control-plane pods not Running after master upgrade"
exit 1
@ -416,7 +418,10 @@ phase_postflight() {
# All 5 nodes at target
local versions wrong
versions=$($KUBECTL get nodes -o jsonpath='{range .items[*]}{.metadata.name}:{.status.nodeInfo.kubeletVersion}{"\n"}{end}')
wrong=$(echo "$versions" | grep -v ":v${TARGET_VERSION}\$" | wc -l)
# `grep -v` returns 1 when all nodes are on target (the happy path —
# exactly when postflight SHOULD succeed); under `set -o pipefail` that
# would abort the script right at the moment of victory.
wrong=$(echo "$versions" | { grep -v ":v${TARGET_VERSION}\$" || true; } | wc -l)
if [ "$wrong" -ne 0 ]; then
slack "ABORT postflight — $wrong node(s) off target:\n$versions"
exit 1