ci: split build and test into separate jobs, upgrade actions to Node 24 - #1128
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Previously each of the 21 test matrix cells built its own Docker image, totalling 21 redundant builds per CI run. New structure: - build_images: 4 jobs (one per PG version), builds the test image and uploads it as a zstd-compressed artifact (retention: 1 day). - run_tests: 21 jobs (same matrix as before), downloads the pre-built image artifact and runs tests against it via make run-test-prebuilt. This cuts Docker builds from 21 to 4 per CI run. Also upgrades all actions/checkout, actions/upload-artifact, and actions/download-artifact from Node 20 to Node 24 (v7/v7/v8) to silence the runner deprecation warning. New Makefile targets: save-test-image docker save | zstd → .tar.zst archive load-test-image zstd decompress | docker load run-test-prebuilt like run-test but without the build prerequisite
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The tablespaces suite runs via $(MAKE) -C tests/tablespaces run-test on the host, not inside the pg_auto_failover_test container. run-test-prebuilt was always entering the container, causing a 33s failure for (14, tablespaces) in CI. Mirror ci-test's ifeq dispatch so tablespaces takes the host path.
This was referenced Jul 10, 2026
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Previously each of the 21 test matrix cells built its own Docker image from scratch — 21 redundant builds per CI run, each taking ~2 minutes of compile time before a single test ran.
Changes
Workflow restructure:
build_images— 4 jobs (one per PG version), builds the test image once and uploads it as a 1-day artifact compressed with zstdrun_tests— 21 jobs (same matrix as before), downloads the pre-built image and runs tests withmake run-test-prebuiltThis cuts Docker builds from 21 to 4 per run.
Actions upgrade:
actions/checkout@v4.2.2→v7.0.0(Node 24)actions/upload-artifact@v7.0.1(Node 24)actions/download-artifact@v8.0.1(Node 24)Fixes the runner deprecation warning: "Node.js 20 is deprecated … actions/checkout@v4.2.2"
New Makefile targets:
Tested locally
make save-test-image+make load-test-imageround-trip confirmed on PG17make run-test-prebuilt PGVERSION=17 TEST=monitor— 17/18 tests pass (1 pre-existing pyroute2 asyncio flakiness intest_replace_monitor, unrelated to this change)