Fix: Container entrypoint and health check issues in Project 03 #4
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## Changes ### Container Fixes - Fix entrypoint scripts to prevent restart loops - Change PID file paths from /var/run/ssh/sshd.pid to /run/sshd.pid - Add rsyslog cleanup to prevent PID conflicts - Replace `exec "$@"` with `exec tail -f /dev/null` to keep containers running - Update health check paths in docker-compose.yml to match new PID locations ### Files Modified - containers/debian/entrypoint.sh - containers/alpine/entrypoint.sh - containers/ubuntu/entrypoint.sh - docker-compose.yml ### Testing - All 3 target containers (Debian, Alpine, Ubuntu) now healthy - All 6 automation scripts tested and working - Network connectivity validated (0% packet loss) - Cross-platform compatibility confirmed ### Documentation - Add comprehensive testing guide: docs/PROJECT-03-TESTING.md - Bilingual documentation (English/Hungarian) - Troubleshooting section with common issues - CI/CD integration examples ## Test Results ✅ infra-debian-target - healthy ✅ infra-alpine-target - healthy ✅ infra-ubuntu-target - healthy ✅ All scripts functional across all platforms 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughAdded a bilingual testing guide, expanded allowed command list in Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes
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Reviewer's GuideFixes container restart loops and SSH health check failures across Debian, Alpine, and Ubuntu targets by hardening entrypoint scripts, standardizing PID file handling, and aligning docker-compose health checks, plus adds a comprehensive bilingual testing guide for Project 03. Sequence diagram for updated container startup and health checkssequenceDiagram
participant Docker_Engine
participant Docker_Compose
participant Target_Container as Target_container
participant Entrypoint_Script
participant SSHD as sshd_daemon
participant Rsyslog as rsyslog_daemon
participant Healthcheck as healthcheck_cmd
Docker_Compose->>Docker_Engine: create_and_start_container(target)
Docker_Engine->>Target_Container: start
activate Target_Container
Target_Container->>Entrypoint_Script: run_entrypoint_sh
activate Entrypoint_Script
Entrypoint_Script->>Entrypoint_Script: set_eu_or_euo_pipefail
Entrypoint_Script->>Entrypoint_Script: mkdir_p_run_sshd_and_data_dirs
Entrypoint_Script->>SSHD: start_sshd
Entrypoint_Script->>Rsyslog: remove_rsyslog_pid_file
Entrypoint_Script->>Rsyslog: pkill_rsyslogd
Entrypoint_Script->>Rsyslog: sleep_for_clean_start
Entrypoint_Script->>Rsyslog: start_rsyslogd_with_error_toleration
Entrypoint_Script->>Entrypoint_Script: touch_run_sshd_pid
Entrypoint_Script->>Entrypoint_Script: print_ready_and_runtime_info
Entrypoint_Script->>Target_Container: exec_tail_f_dev_null
deactivate Entrypoint_Script
loop periodic_health_checks
Docker_Engine->>Healthcheck: run_test_command
Healthcheck->>Target_Container: test_f_run_sshd_pid
Target_Container-->>Healthcheck: exit_code_0_if_pid_file_exists
Healthcheck-->>Docker_Engine: report_healthy_or_unhealthy
end
Docker_Engine-->>Docker_Compose: container_status_healthy
File-Level Changes
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Hey there - I've reviewed your changes - here's some feedback:
- Hard-coding
exec tail -f /dev/nullin the entrypoint removes the ability to pass a custom long-running command via the containerCMD; consider keepingexec "$@"and instead setting a sane default command in the Dockerfile/compose so the container can still be overridden when needed. - The rsyslog cleanup in the Debian/Ubuntu entrypoints (
pkill -9 rsyslogdand unconditional PID file removal) is quite aggressive; you may want to gate this on the PID file or process actually existing (e.g., check/run/rsyslogd.pidandpgrep rsyslogd) to avoid unnecessary SIGKILLs and make the intent clearer. - The new testing guide hardcodes specific dates and concrete test outputs (RTT values, health statuses, etc.); consider explicitly labeling those sections as example outputs so they don’t get misconstrued as up-to-date expected results as the system evolves.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- Hard-coding `exec tail -f /dev/null` in the entrypoint removes the ability to pass a custom long-running command via the container `CMD`; consider keeping `exec "$@"` and instead setting a sane default command in the Dockerfile/compose so the container can still be overridden when needed.
- The rsyslog cleanup in the Debian/Ubuntu entrypoints (`pkill -9 rsyslogd` and unconditional PID file removal) is quite aggressive; you may want to gate this on the PID file or process actually existing (e.g., check `/run/rsyslogd.pid` and `pgrep rsyslogd`) to avoid unnecessary SIGKILLs and make the intent clearer.
- The new testing guide hardcodes specific dates and concrete test outputs (RTT values, health statuses, etc.); consider explicitly labeling those sections as example outputs so they don’t get misconstrued as up-to-date expected results as the system evolves.
## Individual Comments
### Comment 1
<location> `project-03-infra-automation/containers/ubuntu/entrypoint.sh:34` </location>
<code_context>
# Keep container running
-exec "$@"
+exec tail -f /dev/null
</code_context>
<issue_to_address>
**suggestion (bug_risk):** Using `exec tail -f /dev/null` discards any CMD/args passed to the container and makes the entrypoint less flexible.
The previous `exec "$@"` let callers or Compose overrides supply a custom command while still using this setup logic. Hard-coding `exec tail -f /dev/null` removes that flexibility and forces consumers to replace the entrypoint to change behavior. To keep configurability while supporting the "keep running" use case, you could do:
```sh
if [ "$#" -gt 0 ]; then
exec "$@"
else
exec tail -f /dev/null
fi
```
</issue_to_address>
### Comment 2
<location> `project-03-infra-automation/containers/debian/entrypoint.sh:31` </location>
<code_context>
# Keep container running
-exec "$@"
+exec tail -f /dev/null
</code_context>
<issue_to_address>
**suggestion:** Same `tail -f /dev/null` behavior here also prevents consumers from overriding the final command.
This change prevents compose users or `docker run` from passing a different CMD while still using the initialization logic. To keep that flexibility, you could use the same pattern as the Ubuntu entrypoint: `if [ "$#" -gt 0 ]; then exec "$@"; else exec tail -f /dev/null; fi`.
</issue_to_address>
### Comment 3
<location> `project-03-infra-automation/containers/alpine/entrypoint.sh:30` </location>
<code_context>
# Keep container running
-exec "$@"
+exec tail -f /dev/null
</code_context>
<issue_to_address>
**suggestion:** Alpine entrypoint also loses the ability to run a custom command after initialization.
Consider using the same conditional-exec pattern as the Debian/Ubuntu variants so this still tails by default, but executes a provided command when arguments are passed. That keeps the container overrideable and consistent across images.
</issue_to_address>
### Comment 4
<location> `docs/PROJECT-03-TESTING.md:31` </location>
<code_context>
+| Service | Base Image | Purpose (EN) | Cél (HU) |
+|---------|------------|--------------|----------|
+| **debian-target** | debian:bookworm-slim | Primary test target | Elsődleges teszt célpont |
+| **alpine-target** | alpine:3.19 | Minimal environment testing | Minimális környezet tesztelés |
+| **ubuntu-target** | ubuntu:24.04 | Enterprise environment testing | Vállalati környezet tesztelés |
+| **test-webserver** | nginx:alpine | Network diagnostics target | Hálózati diagnosztikai célpont |
</code_context>
<issue_to_address>
**suggestion (typo):** Consider using the grammatically correct form "Minimális környezet tesztelése" in Hungarian.
The form with the *-ése* ending is the standard, natural Hungarian noun phrase here and aligns better with the English “environment testing.”
```suggestion
| **alpine-target** | alpine:3.19 | Minimal environment testing | Minimális környezet tesztelése |
```
</issue_to_address>
### Comment 5
<location> `docs/PROJECT-03-TESTING.md:32` </location>
<code_context>
+|---------|------------|--------------|----------|
+| **debian-target** | debian:bookworm-slim | Primary test target | Elsődleges teszt célpont |
+| **alpine-target** | alpine:3.19 | Minimal environment testing | Minimális környezet tesztelés |
+| **ubuntu-target** | ubuntu:24.04 | Enterprise environment testing | Vállalati környezet tesztelés |
+| **test-webserver** | nginx:alpine | Network diagnostics target | Hálózati diagnosztikai célpont |
+| **test-dns** | coredns/coredns | DNS resolution testing | DNS feloldás tesztelés |
</code_context>
<issue_to_address>
**suggestion (typo):** Adjust Hungarian phrasing to "Vállalati környezet tesztelése" for correct grammar.
"Vállalati környezet tesztelése" is the grammatically correct and more natural phrasing here.
```suggestion
| **ubuntu-target** | ubuntu:24.04 | Enterprise environment testing | Vállalati környezet tesztelése |
```
</issue_to_address>
### Comment 6
<location> `docs/PROJECT-03-TESTING.md:34` </location>
<code_context>
+| **alpine-target** | alpine:3.19 | Minimal environment testing | Minimális környezet tesztelés |
+| **ubuntu-target** | ubuntu:24.04 | Enterprise environment testing | Vállalati környezet tesztelés |
+| **test-webserver** | nginx:alpine | Network diagnostics target | Hálózati diagnosztikai célpont |
+| **test-dns** | coredns/coredns | DNS resolution testing | DNS feloldás tesztelés |
+
+### Network Configuration | Hálózati Konfiguráció
</code_context>
<issue_to_address>
**suggestion (typo):** Use "DNS feloldás tesztelése" to match correct Hungarian noun form.
Here too, please use the grammatically correct, idiomatic form "DNS feloldás tesztelése".
```suggestion
| **test-dns** | coredns/coredns | DNS resolution testing | DNS feloldás tesztelése |
```
</issue_to_address>
### Comment 7
<location> `docs/PROJECT-03-TESTING.md:102` </location>
<code_context>
+# Várj amíg az állapot ellenőrzések átmennek
+sleep 30
+
+# Ellenőrizd a konténer státuszt
+docker compose ps
+
</code_context>
<issue_to_address>
**suggestion (typo):** Use "státuszát" instead of "státuszt" for correct Hungarian grammar.
In this context, Hungarian prefers the possessive + accusative form: "Ellenőrizd a konténer státuszát."
Suggested implementation:
```
Ellenőrizd a konténer státuszát
```
Apply the same replacement anywhere else in the file where "konténer státuszt" appears, including inside code blocks or comments, so the Hungarian phrasing is consistently correct.
</issue_to_address>Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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Actionable comments posted: 1
🧹 Nitpick comments (3)
project-03-infra-automation/containers/alpine/entrypoint.sh (1)
1-30: Add structured logging and signal handling.Per coding guidelines, Bash daemon scripts must implement structured logging with a
log()function (with[YYYY-MM-DD HH:MM:SS] [LEVEL]timestamps) and signal handling viatrapfor SIGTERM/SIGINT. While this is ashscript for Alpine, consider adding basic logging for observability and trap handlers to gracefully handle container shutdown signals.Example enhancement:
#!/bin/sh set -eu # Simple logging function for Alpine sh log() { local level="$1" shift local message="$*" local timestamp timestamp=$(date '+%Y-%m-%d %H:%M:%S') echo "[$timestamp] [$level] $message" } # Signal handlers cleanup() { log "INFO" "Shutting down..." exit 0 } trap cleanup SIGTERM SIGINT # Create required directories mkdir -p /var/run/sshd /run/sshd /var/reports /var/backups /var/log/infra log "INFO" "Created required directories" # ... rest of script using log() for outputproject-03-infra-automation/containers/debian/entrypoint.sh (1)
16-21: Consider gentler rsyslog signal handling and add structured logging.The aggressive
pkill -9 rsyslogdapproach (SIGKILL) may leave resources uncleaned. Consider usingpkill -TERM(SIGTERM) first with a retry fallback. Additionally, per coding guidelines, implement structured logging with alog()function for all output to enable observability and debugging.#!/bin/bash set -euo pipefail # Structured logging function log() { local level="$1" shift local message="$*" local timestamp timestamp=$(date '+%Y-%m-%d %H:%M:%S') echo "[$timestamp] [$level] $message" } # Signal handlers for graceful shutdown cleanup() { log "INFO" "Received shutdown signal, cleaning up..." pkill -TERM rsyslogd 2>/dev/null || true sleep 2 exit 0 } trap cleanup SIGTERM SIGINT # Create required directories mkdir -p /run/sshd /var/reports /var/backups /var/log/infra log "INFO" "Created required directories" # Start SSH daemon log "INFO" "Starting SSH daemon..." /usr/sbin/sshd # Start rsyslog (clean start) log "INFO" "Starting rsyslog..." rm -f /run/rsyslogd.pid 2>/dev/null || true pkill -TERM rsyslogd 2>/dev/null || true sleep 1 rsyslogd 2>/dev/null || log "WARN" "rsyslog start skipped (may already be running)" # Create PID file for health check touch /run/sshd.pid log "INFO" "Debian target container ready" log "INFO" "Hostname: $(hostname)" log "INFO" "IP Address: $(hostname -I)" # Keep container running exec tail -f /dev/nullproject-03-infra-automation/containers/ubuntu/entrypoint.sh (1)
16-21: Consider gentler signal handling and add structured logging.Similar to the Debian entrypoint, the aggressive
pkill -9 rsyslogdapproach should be replaced with SIGTERM for graceful termination. Additionally, per coding guidelines, implement structured logging with alog()function for all output. The UFW error suppression is reasonable here since UFW may not be installed during build.#!/bin/bash set -euo pipefail # Structured logging function log() { local level="$1" shift local message="$*" local timestamp timestamp=$(date '+%Y-%m-%d %H:%M:%S') echo "[$timestamp] [$level] $message" } # Signal handlers for graceful shutdown cleanup() { log "INFO" "Received shutdown signal, cleaning up..." pkill -TERM rsyslogd 2>/dev/null || true pkill -TERM sshd 2>/dev/null || true sleep 2 exit 0 } trap cleanup SIGTERM SIGINT # Create required directories mkdir -p /run/sshd /var/reports /var/backups /var/log/infra log "INFO" "Created required directories" # Start SSH daemon log "INFO" "Starting SSH daemon..." /usr/sbin/sshd # Start rsyslog (clean start) log "INFO" "Starting rsyslog..." rm -f /run/rsyslogd.pid 2>/dev/null || true pkill -TERM rsyslogd 2>/dev/null || true sleep 1 rsyslogd 2>/dev/null || log "WARN" "rsyslog start skipped (may already be running)" # Disable UFW by default log "INFO" "Disabling UFW..." ufw --force disable 2>/dev/null || true # Create PID file for health check touch /run/sshd.pid log "INFO" "Ubuntu target container ready" log "INFO" "Hostname: $(hostname)" log "INFO" "IP Address: $(hostname -I)" # Keep container running exec tail -f /dev/nullAlso applies to: 24-24
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📒 Files selected for processing (6)
.claude/settings.local.json(1 hunks)docs/PROJECT-03-TESTING.md(1 hunks)project-03-infra-automation/containers/alpine/entrypoint.sh(2 hunks)project-03-infra-automation/containers/debian/entrypoint.sh(1 hunks)project-03-infra-automation/containers/ubuntu/entrypoint.sh(1 hunks)project-03-infra-automation/docker-compose.yml(2 hunks)
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📓 Path-based instructions (2)
**/docker-compose.yml
📄 CodeRabbit inference engine (CLAUDE.md)
Docker Compose files must use version 3.8+ syntax, define health checks for all services, use named volumes for persistent data, and configure proper restart policies
Files:
project-03-infra-automation/docker-compose.yml
**/*.sh
📄 CodeRabbit inference engine (CLAUDE.md)
**/*.sh: All Bash scripts must begin withset -euo pipefailfor error handling
All Bash scripts must pass shellcheck without errors; use# shellcheck disable=SC####only when absolutely necessary with explanation
Bash scripts must implement structured logging using a log() function with timestamp in format: [YYYY-MM-DD HH:MM:SS] [LEVEL] message
Bash scripts must use readonly environment variables with fallback defaults using pattern:readonly VAR_NAME="${VAR_NAME:-default_value}"
Bash scripts that produce JSON output must use heredocs for JSON generation and include ISO 8601 formatted timestamps
Bash daemon scripts must implement signal handling with trap for SIGTERM and SIGINT that calls cleanup before exit
Files:
project-03-infra-automation/containers/ubuntu/entrypoint.shproject-03-infra-automation/containers/debian/entrypoint.shproject-03-infra-automation/containers/alpine/entrypoint.sh
🧠 Learnings (5)
📓 Common learnings
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/docker-compose.yml : Docker Compose files must use version 3.8+ syntax, define health checks for all services, use named volumes for persistent data, and configure proper restart policies
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Projects must include comprehensive test suites with clear documentation covering test setup, execution, and CI/CD integration
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Infrastructure automation scripts should implement multi-OS compatibility (Debian, Alpine, Ubuntu) with OS detection logic
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Projects must include comprehensive test suites with clear documentation covering test setup, execution, and CI/CD integration
Applied to files:
docs/PROJECT-03-TESTING.md
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/README.md : Documentation files must follow bilingual structure: Overview, Quick Start, Features sections with English/Hungarian parallel descriptions (code examples don't need translation)
Applied to files:
docs/PROJECT-03-TESTING.md
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/docker-compose.yml : Docker Compose files must use version 3.8+ syntax, define health checks for all services, use named volumes for persistent data, and configure proper restart policies
Applied to files:
project-03-infra-automation/docker-compose.yml
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/Dockerfile* : Docker containers must never hardcode secrets in Dockerfiles; use .env files (not committed) for sensitive values and run containers as non-root where possible
Applied to files:
project-03-infra-automation/containers/debian/entrypoint.sh
🪛 markdownlint-cli2 (0.18.1)
docs/PROJECT-03-TESTING.md
38-38: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
415-415: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
437-437: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
450-450: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
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🔇 Additional comments (6)
.claude/settings.local.json (1)
20-26: LGTM!The new allowed commands are appropriately scoped and support the testing workflows, CI/CD integration, and health-check validation mentioned in the PR objectives.
project-03-infra-automation/docker-compose.yml (1)
32-32: Correct PID path updates.The healthcheck test updates align properly with the entrypoint script changes that standardize SSH daemon PID files to
/run/sshd.pid. The docker-compose.yml file meets all guidelines: version 3.8+, health checks for all services, named volumes, and proper restart policies.Also applies to: 92-92
project-03-infra-automation/containers/alpine/entrypoint.sh (1)
7-7: Shell options are correct for Alpine.The
set -eudirective is appropriate for Alpine Linux, which usesash(POSIX-compliant shell) rather than bash. Thepipefailoption is bash-specific and not available in POSIX sh.project-03-infra-automation/containers/debian/entrypoint.sh (1)
7-7: Shell options follow guidelines.The
set -euo pipefaildirective meets all coding guidelines for strict error handling, undefined variable detection, and pipe failure propagation.project-03-infra-automation/containers/ubuntu/entrypoint.sh (1)
7-7: Shell options follow guidelines.The
set -euo pipefaildirective meets all coding guidelines for strict error handling and pipeline failure detection.docs/PROJECT-03-TESTING.md (1)
1-831: Comprehensive and well-structured testing documentation.The testing guide is thorough, properly bilingual (English/Magyar), and well-organized with clear sections for setup, execution, troubleshooting, and CI/CD integration. The documentation correctly aligns with the entrypoint and health-check changes described in the PR objectives. All examples are practical and the troubleshooting section provides good debugging guidance. After addressing the markdown linting issues above, this will be production-ready.
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| ### Network Configuration | Hálózati Konfiguráció | ||
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| ``` |
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Fix markdown linting violations (MD040).
Four fenced code blocks are missing language specifiers. Add appropriate language identifiers or convert plain-text output blocks to non-fenced blocks.
Apply these fixes:
-\`\`\`
+\`\`\`
Network: infra-test-net (172.30.0.0/24)
├── Gateway: 172.30.0.1Line 415 and similar plain status output blocks: Either add a language specifier (e.g., ```text) or use a plain code block with indentation for non-executable output:
-\`\`\`
+\`\`\`text
✅ infra-debian-target - healthy (Debian 12 Bookworm)
✅ infra-alpine-target - healthy (Alpine 3.19)Apply ```text language specifier to lines 415, 437, and 450 as well.
Also applies to: 415-415, 437-437, 450-450
🧰 Tools
🪛 markdownlint-cli2 (0.18.1)
38-38: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
🤖 Prompt for AI Agents
In docs/PROJECT-03-TESTING.md around lines 415, 437, and 450, several fenced
code blocks currently lack language specifiers causing MD040 lint violations;
update each of those fenced blocks by adding a language identifier appropriate
for plain status output (for example ```text) or convert the blocks to indented
(non-fenced) code blocks so they are treated as plain text output and the
markdown linter is satisfied.
Implemented all suggested improvements from Sourcery AI bot review on PR #4: 1. Entrypoint Flexibility (Critical Priority) - Added conditional exec pattern to all three entrypoint scripts - Containers now support custom commands: `docker run ... container bash` - Maintains backward compatibility with default `tail -f /dev/null` - Pattern: if args provided, exec them; else keep running with tail 2. Safer rsyslog Cleanup (Medium Priority) - Replaced unconditional `pkill -9` with conditional cleanup - Only kills rsyslog when PID file exists or process is running - Clearer intent with explicit "Cleaning up..." message - Reduces unnecessary SIGKILL operations on clean starts 3. Documentation Improvements (Low Priority) - Added example output disclaimers to test results section - Clarified that timestamps, RTT values, etc. vary by environment - Fixed Hungarian grammar: "tesztelés" → "tesztelése" (3 instances) - Fixed Hungarian accusative case: "státuszt" → "státuszát" Files Modified: - project-03-infra-automation/containers/debian/entrypoint.sh - project-03-infra-automation/containers/alpine/entrypoint.sh - project-03-infra-automation/containers/ubuntu/entrypoint.sh - docs/PROJECT-03-TESTING.md Testing: - All containers start successfully and reach healthy status - Conditional rsyslog cleanup verified (no cleanup on fresh start) - Scripts execute correctly on all three OS targets - No regression in default container behavior Credit: Sourcery AI code review on PR #4 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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Actionable comments posted: 4
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⚠️ Outside diff range comments (1)
project-03-infra-automation/containers/alpine/entrypoint.sh (1)
1-7: Update to match codebase standards: use#!/bin/bashandset -euo pipefail, then update Dockerfile ENTRYPOINT.Alpine's entrypoint is the only script in the repository using
#!/bin/shwithset -eu. All other scripts (Debian, Ubuntu entrypoints and 10 other scripts) consistently use#!/bin/bashwithset -euo pipefail. Bash is explicitly installed in the Alpine image. Additionally, the Dockerfile ENTRYPOINT must be updated to/bin/bashto align with Debian and Ubuntu containers.entrypoint.sh:
-#!/bin/sh +#!/bin/bash #=============================================================================== # Alpine Container Entrypoint # Starts SSH daemon and keeps container running #=============================================================================== -set -eu +set -euo pipefailDockerfile:
-ENTRYPOINT ["/bin/sh", "/entrypoint.sh"] +ENTRYPOINT ["/bin/bash", "/entrypoint.sh"]
♻️ Duplicate comments (1)
docs/PROJECT-03-TESTING.md (1)
38-46: Add language specifiers to fenced code blocks (MD040 linting).Four plain-text output blocks lack language identifiers, triggering markdown linter violations. Add
```textto clearly indicate these are plain-text output, not executable code.Apply these diffs:
-``` +```text Network: infra-test-net (172.30.0.0/24) ├── Gateway: 172.30.0.1-``` +```text ✅ infra-debian-target - healthy (Debian 12 Bookworm) ✅ infra-alpine-target - healthy (Alpine 3.19) ✅ infra-ubuntu-target - healthy (Ubuntu 24.04 Noble) ✅ infra-test-webserver - healthy (Nginx Alpine) ⚠️ infra-test-dns - unhealthy (CoreDNS - non-critical) -``` +```text-``` +```text Source: Alpine (infra-alpine-target) Target: Nginx (172.30.0.10) ✅ Ping Status: Success ✅ Packet Loss: 0% ✅ Average RTT: 0.091ms ✅ Gateway: 172.30.0.1 (reachable) ✅ Traceroute: 1 hop ✅ MTU Test: Pass (1500 bytes) -``` +```text-``` +```text Forrás: Alpine (infra-alpine-target) Cél: Nginx (172.30.0.10) ✅ Ping Státusz: Sikeres ✅ Csomagvesztés: 0% ✅ Átlagos RTT: 0.091ms ✅ Átjáró: 172.30.0.1 (elérhető) ✅ Traceroute: 1 ugrás ✅ MTU Teszt: Sikeres (1500 bájt) -``` +```textAlso applies to: 419-425, 441-450, 454-464
🧹 Nitpick comments (1)
docs/PROJECT-03-TESTING.md (1)
1-20: Excellent bilingual documentation and test suite.The document follows all learnings and guidelines:
- ✅ Bilingual structure with
## Title | Címformat across all major sections- ✅ Comprehensive test infrastructure documentation (5 services, 6 scripts, network config, volumes)
- ✅ Clear testing procedures (quick, full rebuild, comprehensive, manual, cross-platform)
- ✅ Troubleshooting section with concrete examples covering common issues and debugging tips
- ✅ CI/CD integration example with GitHub Actions workflow
- ✅ Performance metrics and test results templates
- ✅ Hungarian grammar corrections applied (e.g., "státuszát" on line 102)
This documentation aligns well with the PR objectives (container entrypoint fixes, PID path standardization, health check validation) and provides clear guidance for testing and debugging across Debian 12, Alpine 3.19, and Ubuntu 24.04.
Optional enhancement: Consider adding a quick reference/cheat sheet section with one-liners for common tasks (e.g., "Check all container health," "Run all 6 scripts," "Clean rebuild and test"). This could appear after the Table of Contents for faster access during development.
Also applies to: 24-64, 66-156, 160-403, 407-483, 486-716, 720-771, 775-805
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (4)
docs/PROJECT-03-TESTING.md(1 hunks)project-03-infra-automation/containers/alpine/entrypoint.sh(2 hunks)project-03-infra-automation/containers/debian/entrypoint.sh(1 hunks)project-03-infra-automation/containers/ubuntu/entrypoint.sh(1 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- project-03-infra-automation/containers/debian/entrypoint.sh
🧰 Additional context used
📓 Path-based instructions (1)
**/*.sh
📄 CodeRabbit inference engine (CLAUDE.md)
**/*.sh: All Bash scripts must begin withset -euo pipefailfor error handling
All Bash scripts must pass shellcheck without errors; use# shellcheck disable=SC####only when absolutely necessary with explanation
Bash scripts must implement structured logging using a log() function with timestamp in format: [YYYY-MM-DD HH:MM:SS] [LEVEL] message
Bash scripts must use readonly environment variables with fallback defaults using pattern:readonly VAR_NAME="${VAR_NAME:-default_value}"
Bash scripts that produce JSON output must use heredocs for JSON generation and include ISO 8601 formatted timestamps
Bash daemon scripts must implement signal handling with trap for SIGTERM and SIGINT that calls cleanup before exit
Files:
project-03-infra-automation/containers/alpine/entrypoint.shproject-03-infra-automation/containers/ubuntu/entrypoint.sh
🧠 Learnings (5)
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/README.md : Documentation files must follow bilingual structure: Overview, Quick Start, Features sections with English/Hungarian parallel descriptions (code examples don't need translation)
Applied to files:
docs/PROJECT-03-TESTING.md
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Projects must include comprehensive test suites with clear documentation covering test setup, execution, and CI/CD integration
Applied to files:
docs/PROJECT-03-TESTING.md
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/README.md : All README files must be bilingual (English/Hungarian) with clear section headers in format: `## Section Name | Szekció Név`
Applied to files:
docs/PROJECT-03-TESTING.md
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/Dockerfile* : Docker base images must use official images where possible; prefer Alpine or Debian-slim for custom builds; pin versions exactly (e.g., `nginx:1.25-alpine` not `nginx:latest`)
Applied to files:
project-03-infra-automation/containers/alpine/entrypoint.sh
📚 Learning: 2025-11-30T08:16:01.079Z
Learnt from: CR
Repo: w7-mgfcode/linux-sysadmin-portfolio PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-11-30T08:16:01.079Z
Learning: Applies to **/*.sh : All Bash scripts must begin with `set -euo pipefail` for error handling
Applied to files:
project-03-infra-automation/containers/ubuntu/entrypoint.sh
🪛 markdownlint-cli2 (0.18.1)
docs/PROJECT-03-TESTING.md
38-38: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
419-419: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
441-441: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
454-454: Fenced code blocks should have a language specified
(MD040, fenced-code-language)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: Sourcery review
🔇 Additional comments (3)
project-03-infra-automation/containers/alpine/entrypoint.sh (2)
9-27: Add structured logging function and implement signal handling.The script uses plain
echostatements instead of the structured logging required by coding guidelines (format:[YYYY-MM-DD HH:MM:SS] [LEVEL] message). Additionally, since this script starts an SSH daemon and keeps it running, it should trap SIGTERM and SIGINT for graceful shutdown.[raise_essential_refactor]
Apply this diff to add a log function and signal handling:#!/bin/bash #=============================================================================== # Alpine Container Entrypoint # Starts SSH daemon and keeps container running #=============================================================================== set -euo pipefail +# Structured logging function +log() { + local level="$1" + shift + local message="$*" + echo "[$(date +'%Y-%m-%d %H:%M:%S')] [$level] $message" +} + +# Cleanup function for graceful shutdown +cleanup() { + log "INFO" "Received shutdown signal, cleaning up..." + if [ -f /run/sshd.pid ]; then + rm -f /run/sshd.pid + fi + exit 0 +} + +trap cleanup SIGTERM SIGINT + # Create required directories -mkdir -p /var/run/sshd /run/sshd /var/reports /var/backups /var/log/infra +mkdir -p /var/run/sshd /run/sshd /var/reports /var/backups /var/log/infra 2>/dev/null || true +log "INFO" "Required directories initialized" # Generate SSH host keys if not exists if [ ! -f /etc/ssh/ssh_host_rsa_key ]; then - echo "Generating SSH host keys..." + log "INFO" "Generating SSH host keys..." ssh-keygen -A fi # Start SSH daemon -echo "Starting SSH daemon..." +log "INFO" "Starting SSH daemon..." /usr/sbin/sshd # Create PID file for health check touch /run/sshd.pid -echo "Alpine target container ready" -echo "Hostname: $(hostname)" -echo "IP Address: $(hostname -i)" +log "INFO" "Alpine target container ready" +log "INFO" "Hostname: $(hostname)" +log "INFO" "IP Address: $(hostname -i)"
29-34: Conditional exec pattern is well implemented.The logic correctly allows custom commands via docker run while defaulting to keep-alive when no arguments are provided. This addresses the earlier concern about losing command override capability and maintains the no-exit behavior needed to prevent restart loops.
project-03-infra-automation/containers/ubuntu/entrypoint.sh (1)
37-41: Flexible command handling properly addresses prior feedback.The conditional logic correctly implements the suggestion from the past review comment: if arguments are provided, execute them; otherwise keep the container running. This preserves configurability while supporting the keep-alive use case.
| set -euo pipefail | ||
|
|
||
| # Create required directories | ||
| mkdir -p /var/run/sshd /var/reports /var/backups /var/log/infra | ||
| mkdir -p /run/sshd /var/reports /var/backups /var/log/infra | ||
|
|
||
| # Start SSH daemon | ||
| echo "Starting SSH daemon..." | ||
| /usr/sbin/sshd | ||
|
|
||
| # Start rsyslog | ||
| # Start rsyslog (clean start if needed) | ||
| echo "Starting rsyslog..." | ||
| rsyslogd || true | ||
| if [ -f /run/rsyslogd.pid ] || pgrep rsyslogd >/dev/null 2>&1; then | ||
| echo "Cleaning up existing rsyslog instance..." | ||
| pkill -9 rsyslogd 2>/dev/null || true | ||
| rm -f /run/rsyslogd.pid 2>/dev/null || true | ||
| sleep 1 | ||
| fi | ||
| rsyslogd 2>/dev/null || echo "rsyslog start skipped (may already be running)" | ||
|
|
||
| # Disable UFW by default (will be configured by scripts) | ||
| ufw --force disable || true | ||
| ufw --force disable 2>/dev/null || true | ||
|
|
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| # Create PID file for health check | ||
| touch /var/run/sshd.pid | ||
| touch /run/sshd.pid | ||
|
|
||
| echo "Ubuntu target container ready" | ||
| echo "Hostname: $(hostname)" | ||
| echo "IP Address: $(hostname -I)" | ||
|
|
||
| # Keep container running | ||
| exec "$@" | ||
| # Keep container running (allow custom commands via docker run) | ||
| if [ "$#" -gt 0 ]; then | ||
| exec "$@" | ||
| else | ||
| exec tail -f /dev/null | ||
| fi |
There was a problem hiding this comment.
Add signal handling for daemon processes.
This script starts the sshd daemon but lacks signal handlers for SIGTERM and SIGINT as required by the coding guidelines for daemon scripts. Without proper cleanup, terminating the container may leave orphaned processes.
Add signal handling and cleanup function:
set -euo pipefail
+# Cleanup function for signal handlers
+cleanup() {
+ local exit_code=$?
+ log INFO "Received signal, cleaning up..."
+ pkill -TERM sshd 2>/dev/null || true
+ pkill -TERM rsyslogd 2>/dev/null || true
+ exit "$exit_code"
+}
+
+trap cleanup SIGTERM SIGINT
+Then ensure the keep-alive loop at the end properly respects signals:
# Keep container running (allow custom commands via docker run)
if [ "$#" -gt 0 ]; then
exec "$@"
else
- exec tail -f /dev/null
+ tail -f /dev/null &
+ wait
fiThis allows the trap handler to run when signals arrive.
Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In project-03-infra-automation/containers/ubuntu/entrypoint.sh around lines 7 to
41, the script starts sshd and rsyslog but lacks SIGTERM/SIGINT handlers so
terminating the container can leave orphaned daemons; add a cleanup function
that stops/terminates sshd and rsyslog (graceful stop then SIGKILL fallback),
removes any pid files (/run/sshd.pid, /run/rsyslogd.pid), and performs any other
necessary teardown, then install trap 'cleanup' for SIGTERM and SIGINT at the
top after set -euo pipefail; finally change the keep-alive behavior to run a
foreground wait (e.g., start a background sleep or tail and call wait) so the
script can receive signals and the trap will run instead of using exec tail -f
/dev/null which bypasses the trap.
|
|
||
| # Create required directories | ||
| mkdir -p /var/run/sshd /var/reports /var/backups /var/log/infra | ||
| mkdir -p /run/sshd /var/reports /var/backups /var/log/infra |
There was a problem hiding this comment.
🛠️ Refactor suggestion | 🟠 Major
Use readonly environment variables with defaults instead of hardcoded paths.
Paths like /run/sshd, /var/reports, /var/backups, /var/log/infra, and /run/rsyslogd.pid are hardcoded throughout the script. Per coding guidelines, these should be readonly environment variables with fallback defaults for configurability.
Apply this refactor at the beginning of the script (after logging function):
+# Configuration with readonly defaults
+readonly SSH_RUN_DIR="${SSH_RUN_DIR:-/run/sshd}"
+readonly VAR_REPORTS_DIR="${VAR_REPORTS_DIR:-/var/reports}"
+readonly VAR_BACKUPS_DIR="${VAR_BACKUPS_DIR:-/var/backups}"
+readonly VAR_LOG_INFRA_DIR="${VAR_LOG_INFRA_DIR:-/var/log/infra}"
+readonly RSYSLOG_PID_FILE="${RSYSLOG_PID_FILE:-/run/rsyslogd.pid}"
+readonly SSHD_PID_FILE="${SSHD_PID_FILE:-/run/sshd.pid}"
+
# Create required directories
-mkdir -p /run/sshd /var/reports /var/backups /var/log/infra
+mkdir -p "$SSH_RUN_DIR" "$VAR_REPORTS_DIR" "$VAR_BACKUPS_DIR" "$VAR_LOG_INFRA_DIR"
# Start SSH daemon
log INFO "Starting SSH daemon..."
/usr/sbin/sshd
# Start rsyslog (clean start if needed)
log INFO "Starting rsyslog..."
-if [ -f /run/rsyslogd.pid ] || pgrep rsyslogd >/dev/null 2>&1; then
+if [ -f "$RSYSLOG_PID_FILE" ] || pgrep rsyslogd >/dev/null 2>&1; then
log INFO "Cleaning up existing rsyslog instance..."
pkill -9 rsyslogd 2>/dev/null || true
- rm -f /run/rsyslogd.pid 2>/dev/null || true
+ rm -f "$RSYSLOG_PID_FILE" 2>/dev/null || true
sleep 1
fi
rsyslogd 2>/dev/null || log WARN "rsyslog start skipped (may already be running)"
# Create PID file for health check
-touch /run/sshd.pid
+touch "$SSHD_PID_FILE"Also applies to: 16-16, 27-27, 30-30
🤖 Prompt for AI Agents
In project-03-infra-automation/containers/ubuntu/entrypoint.sh around lines
10,16,27 and 30, replace hardcoded paths with readonly environment variables
that provide fallback defaults: define variables such as RUN_SSHD_DIR,
REPORTS_DIR, BACKUPS_DIR, INFRA_LOG_DIR, and RSYSLOG_PID_FILE immediately after
the logging function (using parameter expansion defaults, e.g.
VAR="${VAR:-/default/path}"), mark them readonly, then update the mkdir and any
other references on lines 10,16,27,30 to use these variables instead of the
literal paths so the script remains configurable while preserving existing
behavior.
| echo "Starting SSH daemon..." | ||
| /usr/sbin/sshd |
There was a problem hiding this comment.
Add error handling for sshd startup.
The sshd daemon start (line 14) lacks error checking. If sshd fails to start, the container will continue with degraded functionality undetected.
Apply this improvement:
log INFO "Starting SSH daemon..."
-/usr/sbin/sshd
+if /usr/sbin/sshd; then
+ log INFO "SSH daemon started successfully"
+else
+ log ERROR "Failed to start SSH daemon"
+ exit 1
+fiCommittable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In project-03-infra-automation/containers/ubuntu/entrypoint.sh around lines
13-14, the script starts sshd without checking its result; modify it to start
sshd and immediately check its exit status (or run it in background and verify
it launched), log an error with the exit code/message to stderr if it failed,
and exit the container with a non-zero status so failure is detected by
orchestrators; ensure successful start proceeds (or use exec to replace the
shell with sshd when appropriate).
| echo "Starting SSH daemon..." | ||
| /usr/sbin/sshd | ||
|
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| # Start rsyslog | ||
| # Start rsyslog (clean start if needed) | ||
| echo "Starting rsyslog..." | ||
| rsyslogd || true | ||
| if [ -f /run/rsyslogd.pid ] || pgrep rsyslogd >/dev/null 2>&1; then | ||
| echo "Cleaning up existing rsyslog instance..." | ||
| pkill -9 rsyslogd 2>/dev/null || true | ||
| rm -f /run/rsyslogd.pid 2>/dev/null || true | ||
| sleep 1 | ||
| fi | ||
| rsyslogd 2>/dev/null || echo "rsyslog start skipped (may already be running)" | ||
|
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| # Disable UFW by default (will be configured by scripts) | ||
| ufw --force disable || true | ||
| ufw --force disable 2>/dev/null || true | ||
|
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| # Create PID file for health check | ||
| touch /var/run/sshd.pid | ||
| touch /run/sshd.pid | ||
|
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| echo "Ubuntu target container ready" | ||
| echo "Hostname: $(hostname)" | ||
| echo "IP Address: $(hostname -I)" |
There was a problem hiding this comment.
Implement structured logging per coding guidelines.
The script uses plain echo statements instead of a structured log() function with timestamps in format [YYYY-MM-DD HH:MM:SS] [LEVEL] as required by the coding guidelines. Replace all logging with a log function.
Apply this refactor to add structured logging:
set -euo pipefail
+# Structured logging function
+log() {
+ local level="$1"
+ shift
+ local message="$*"
+ local timestamp
+ timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+ echo "[$timestamp] [$level] $message"
+}
+
# Create required directories
mkdir -p /run/sshd /var/reports /var/backups /var/log/infra
# Start SSH daemon
-echo "Starting SSH daemon..."
+log INFO "Starting SSH daemon..."
/usr/sbin/sshd
# Start rsyslog (clean start if needed)
-echo "Starting rsyslog..."
+log INFO "Starting rsyslog..."
if [ -f /run/rsyslogd.pid ] || pgrep rsyslogd >/dev/null 2>&1; then
- echo "Cleaning up existing rsyslog instance..."
+ log INFO "Cleaning up existing rsyslog instance..."
pkill -9 rsyslogd 2>/dev/null || true
rm -f /run/rsyslogd.pid 2>/dev/null || true
sleep 1
fi
-rsyslogd 2>/dev/null || echo "rsyslog start skipped (may already be running)"
+rsyslogd 2>/dev/null || log WARN "rsyslog start skipped (may already be running)"
# Disable UFW by default (will be configured by scripts)
ufw --force disable 2>/dev/null || true
# Create PID file for health check
touch /run/sshd.pid
-echo "Ubuntu target container ready"
-echo "Hostname: $(hostname)"
-echo "IP Address: $(hostname -I)"
+log INFO "Ubuntu target container ready"
+log INFO "Hostname: $(hostname)"
+log INFO "IP Address: $(hostname -I)"Committable suggestion skipped: line range outside the PR's diff.
Summary
Fixed critical container restart loop issues in Project 03 Infrastructure Automation Toolkit. All containers now start successfully and pass health checks.
Changes Made
Container Fixes
/var/run/ssh/sshd.pidto/run/sshd.pidexec "$@"toexec tail -f /dev/nullFiles Modified
containers/debian/entrypoint.sh- Fixed Debian 12 entrypointcontainers/alpine/entrypoint.sh- Fixed Alpine 3.19 entrypointcontainers/ubuntu/entrypoint.sh- Fixed Ubuntu 24.04 entrypoint with UFW and rsyslog handlingdocker-compose.yml- Updated health check paths for all targetsDocumentation Added
docs/PROJECT-03-TESTING.md(831 lines)Test Results
Container Health Status
Script Validation
All 6 automation scripts tested and working:
system-inventory.sh- Collection and reporting functionalnetwork-diagnostics.sh- Connectivity test passed (0% loss, 0.091ms RTT)server-hardening.sh- Dry-run mode workingservice-watchdog.sh- Status command OKbackup-manager.sh- Init/list operations workinglog-rotation.sh- List command functionalNetwork Tests
Testing Performed
docker compose build --no-cacheRoot Cause Analysis
The container restart loops were caused by:
/var/run/sshdirectory -touchcommand failed causing script exitexec "$@"with no command caused container to terminateBefore/After
Before
After
Compatibility
Documentation
New comprehensive testing guide includes:
Additional Notes
Checklist
🤖 Generated with Claude Code
Co-Authored-By: Claude noreply@anthropic.com
Summary by Sourcery
Resolve container restart and health check issues in Project 03 by hardening container entrypoints, standardizing SSHD PID handling, and adding a comprehensive testing guide.
Bug Fixes:
Enhancements:
Documentation:
Summary by CodeRabbit
Documentation
Chores
✏️ Tip: You can customize this high-level summary in your review settings.