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fix: preserve kickstart gzip fallback for curl HTTP errors - #24048
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Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughInstaller scripts now store warning entries on separate lines, print deferred warnings literally, and escape values written to status files. Kickstart also handles curl code 56 based on the final logged HTTP status. Regression tests and a GitHub Actions workflow cover installer shell behavior. ChangesInstaller warning and download handling
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: Medium Suggested reviewers: Merge Risk: ⚪ Minimal · up to The changes appear ready to merge after normal checks; no actionable merge-blocking risk is established. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The installer can now try the existing gzip fallback after certain failed zstd downloads. Checksum verification remains in place, and warning values are escaped before being passed between scripts. No new exposed service or elevated access was identified, but the assessment does not cover a complete installation run. Retained concerns Security review detailsSecurity Blast Radius
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🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 3.70% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 27 functions across 7 files. (1 skipped: 1 unsupported.)
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PR Summary by QodoPreserve gzip fallback for curl HTTP receive errors
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Code Review by Qodo
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| printf >&2 "%s\n" "The following non-fatal warnings or errors were encountered:" | ||
| # shellcheck disable=SC2059 | ||
| printf >&2 "${NETDATA_WARNINGS}" | ||
| printf >&2 "%b" "${NETDATA_WARNINGS}" |
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1. Later installer warnings can disappear 🐞 Bug ◔ Observability
deferred_warnings passes the entire NETDATA_WARNINGS accumulator to %b, so backslash sequences in dynamic warning text are interpreted as formatting controls. Under shells that preserve the argument text, an option such as --claim-\c reaches warning() and makes printf stop before subsequent diagnostics and final spacing.
Agent Prompt
## Issue description
Deferred warning text is rendered using `%b`, which interprets dynamic backslash sequences such as `\c` and can truncate all later diagnostics.
## Fix Focus Areas
- packaging/installer/kickstart.sh[495-500]
- packaging/installer/kickstart.sh[576-581]
- packaging/installer/kickstart.sh[635-641]
## Recommended Fix
Store actual newline characters when appending warnings instead of literal `\n` sequences, then render `NETDATA_WARNINGS` with a constant `%s` format. Update the warning-output test to cover `\c`, octal escapes, and ordinary backslashes as literal text.
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Addressed the warning preservation and missing CI coverage findings. Warning accumulators now use real newline separators and are printed as data, including the shared installer, updater, and uninstaller paths. Child status-file serialization preserves backslashes and shell metacharacters. Added a regression for literal Prepared with Codex assistance. |
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2 participants
Summary
Fixes #24046.
When curl returns receive-error code 56 alongside an HTTP 4xx/5xx response, classify it through the existing HTTP-status handler. This lets the source installer fall back to gzip when a zstd archive returns 404. Receive failures with HTTP 200 or 000 remain fatal; TLS and connection-error handling is unchanged.
Print deferred warnings with a constant
%bformat so a command containing%{http_code}no longer truncates the warning or produces a printf error. This preserves the accumulated warnings' existing escaped newlines.Test Plan
tests/kickstart-http-fallback-test.sh: 11 curl/HTTP-status combinations, partial-download cleanup, percent-containing warnings, and the actual source-build selection function with transport/build stubs. Before the fix, three HTTP-status cases, warning output, and gzip fallback failed. Afterward it passes under bothsh(dash) and bash on Linux.sh tests/kickstart-path-sanitizer-test.shpasses.git diff --checkpass. ShellCheck passes on the new test; the installer has the same two baseline warnings (SC2044 and SC2034).query-netdata-agentssymlink as a regular file; its target exists in Git. No SOW/spec files are included in this PR.No real installation or macOS run was performed.
Additional Information
Prepared with Codex assistance.
For users: How does this change affect me?
Local source installations can use the existing gzip fallback when an unavailable zstd archive produces curl error 56 with an HTTP error response. Deferred installer warnings containing percent signs remain readable.
Summary by cubic
Fixes the kickstart installer so source installs fall back to gzip when curl reports an HTTP 4xx/5xx error as receive error 56, and preserves deferred warnings containing percent signs and other shell metacharacters.
\nstrings and escapes shell metacharacters when writing the status file, so rendered output like%{http_code}survives unchanged across kickstart, updater, uninstaller, and helper scripts.tests/kickstart-http-fallback-test.shandtests/kickstart-warning-test.sh, run on dash and bash in a new CI workflow.Written for commit 6a32f99. Summary will update on new commits.
Summary by CodeRabbit