v0.8.1

What's fixed

• Disk usage % on filesystems with reserved blocks. sysinfo's available_space() returns f_bavail (space for non-root), so the previous total - available formula counted ext4's default 5% root reserve as used. An empty 220G /mnt/ssd reported 5% used / 11.3G.
• alertpaca now calls POSIX statvfs directly: used = (f_blocks - f_bfree) * f_frsize, pct = used / (used + available). Matches df.

v0.8.0

What's new

• Temperature monitoring — auto-detects CPU package and NVMe/disk composite temps via sysinfo Components. Warns at 15°C below hardware-reported critical threshold (defaults: 95°C CPU, 70°C disk).
• Cleaner disk listing — boot partitions (/boot, /boot/efi) are now filtered out to reduce noise.

v0.7.0

What's new

Cron job monitoring — alertpaca now auto-detects cron jobs by parsing crontab -l, /etc/crontab, and /etc/cron.d/*, then checks journald/syslog for evidence of execution. Warns if a scheduled job appears to have missed its window.

• Supports standard 5-field schedules, system crontabs (with user field), and shorthands (@daily, @hourly, etc.)
• 25-hour lookback window covers daily jobs with slack
• Summary by default, per-job detail with source file only on warnings
• Optional [cron] config section to ignore noisy entries (e.g. run-parts)
• Linux only, zero configuration required

Config example

[cron]
ignore = ["run-parts"]

v0.6.0

What's new

• Pending updates check — detects upgradable apt packages and warns on security updates (Linux only)

Downloads

Platform	Binary
Linux x86_64	alertpaca-linux-amd64
macOS Apple Silicon	alertpaca-darwin-arm64

# Linux
curl -Lo alertpaca https://github.com/fabioconcina/alertpaca/releases/latest/download/alertpaca-linux-amd64
chmod +x alertpaca && ./alertpaca

# macOS
curl -Lo alertpaca https://github.com/fabioconcina/alertpaca/releases/latest/download/alertpaca-darwin-arm64
chmod +x alertpaca && ./alertpaca

v0.5.0

Notifications

• ntfy.sh notifications — alert on status changes (Warning/Critical/Recovery)
• State-based diffing: only notifies on transitions, not every run
• Works with ntfy.sh, Slack webhooks, Discord webhooks, Gotify, or any POST endpoint
• Config: [notify] url = "https://ntfy.sh/your-topic"

v0.4.0

What's new

• HTTP endpoint checks — monitor web services with configurable URL checks. Critical if unreachable/5xx, warn if 4xx. Shows response time and status code.
• DNS resolution checks — verify DNS servers resolve domains correctly. Critical if resolution fails, warn if >1s. Useful for monitoring Pi-hole/Unbound chains.

Configuration

[[endpoint]]
name = "Immich"
url = "http://localhost:2283"
# expect_status = 200  # optional

[[dns]]
name = "Pi-hole"
domain = "google.com"
server = "192.168.1.100"  # optional, defaults to 127.0.0.1

v0.3.0

What's new

• NTP clock skew check — queries pool.ntp.org (configurable), warns at >100ms, critical at >1s
• Swap usage check — auto-detected, warns at >50%, critical at >90% (hidden if no swap)

Configuration

NTP server and thresholds are optionally configurable in config.toml:

[ntp]
server = "time.google.com"
warn_ms = 50
critical_ms = 500

v0.2.0

What's new

• Splash screen — 2-second centered ASCII art logo on startup (any key to dismiss)
• --json — run all checks once, output JSON array to stdout
• --once — run all checks once, print plain-text table to stdout
• --mcp — MCP server over stdio with check_health tool for AI agents
• Exit codes — 0 (all ok), 1 (error), 2 (warning/critical found)
• llms.txt — LLM-friendly project reference
• Rust edition 2024

Exit codes

Code	Meaning
0	All checks passed (Ok or Skipped)
1	Error (config load failure, I/O error)
2	At least one check returned Warning or Critical

Download

• alertpaca-linux-amd64 — Linux x86_64
• alertpaca-darwin-arm64 — macOS Apple Silicon

v0.1.0

Initial release.

Checks

• CPU, memory, disk usage (with fill prediction), system load, uptime
• Systemd failed units, Docker unhealthy/restarting containers
• Backup freshness (file glob, restic, ZFS) — via config
• TLS certificate expiry — via config
• Port/service drift detection

Download

• alertpaca-linux-amd64 — Linux x86_64
• alertpaca-darwin-arm64 — macOS Apple Silicon