Nex HealthCheck#

Multi-service health dashboard and monitoring tool. Monitor websites, APIs, SSL certificates, Docker containers, systemd services, infrastructure health, and more. All checks run locally. Optional Telegram notifications.

When to Use#

Use this skill when the user asks about:

• Service uptime, health status, or monitoring
• Website or API availability checks
• SSL certificate expiry dates or renewal
• Docker container status or health
• Systemd service status
• Server or infrastructure health checks
• Disk usage or space monitoring
• Ping or network connectivity
• Incident history or downtime events
• Uptime statistics and SLA tracking
• Health dashboards or status pages

Trigger phrases: "is everything healthy?", "what went down this week?", "when does my SSL cert expire?", "check if ollama is running", "monitor my services", "uptime stats", "disk usage", "service health", "infrastructure status"

Quick Setup#

If the database does not exist yet, run the setup script:

bash

bash setup.sh

This creates the data directory, installs the CLI tool, and initializes the database.

Available Commands#

The CLI tool is nex-healthcheck. All commands output plain text.

Check Services#

Run health checks on monitored services:

bash

nex-healthcheck check              # Run all enabled checks
nex-healthcheck check --service "nex-ai.be"
nex-healthcheck check --group "production"
nex-healthcheck check --tag "pi"

Add Service#

Add a service to monitor:

bash

nex-healthcheck add --name "nex-ai.be" --type http --target "https://nex-ai.be" --expected 200
nex-healthcheck add --name "HAL-9000" --type tcp --target "192.168.1.100" --port 2222
nex-healthcheck add --name "SSL nex-ai.be" --type ssl_cert --target "nex-ai.be"
nex-healthcheck add --name "Pi Docker Ollama" --type docker --target "ollama" --ssh-host "pi@192.168.1.100"
nex-healthcheck add --name "Pi Disk" --type disk --target "/" --ssh-host "pi@192.168.1.100" --group "pi-infra"
nex-healthcheck add --name "Cloudflare DNS" --type dns --target "nex-ai.be"
nex-healthcheck add --name "Life Logger" --type systemd --target "nex-life-logger" --ssh-host "pi@192.168.1.100"
nex-healthcheck add --name "Health API" --type ssh_cmd --ssh-host "user@server" --target "curl http://localhost:8000/health" --expected "ok"

Check types:

• http: HTTP GET request, check status code
• tcp: TCP socket connection test
• dns: DNS resolution check (requires dig/nslookup)
• ssl_cert: SSL certificate expiry check
• docker: Docker container status (requires docker CLI or SSH)
• systemd: Systemd service status (requires systemctl or SSH)
• ssh_cmd: Run arbitrary command via SSH
• ping: ICMP ping check
• disk: Disk usage check

List Services#

bash

nex-healthcheck list              # Show all monitored services

Remove Service#

bash

nex-healthcheck remove --name "service-name"

Status#

bash

nex-healthcheck status            # Quick status from last checks

History#

bash

nex-healthcheck history --name "service-name" --days 7
nex-healthcheck history --name "service-name" --days 30

Incidents#

bash

nex-healthcheck incidents          # Show active incidents
nex-healthcheck incidents --all    # Show all incidents (active + resolved)

Uptime Statistics#

bash

nex-healthcheck uptime --days 30
nex-healthcheck uptime --days 7

Dashboard#

bash

nex-healthcheck dashboard         # Full dashboard view

Send Dashboard via Telegram#

bash

nex-healthcheck notify            # Send current status to Telegram

Requires HEALTHCHECK_TELEGRAM_TOKEN and HEALTHCHECK_TELEGRAM_CHAT environment variables.

Configuration#

bash

nex-healthcheck config --set-token "YOUR_BOT_TOKEN"
nex-healthcheck config --set-chat "YOUR_CHAT_ID"

Example Interactions#

User: "Is everything healthy?" Agent runs: nex-healthcheck dashboard Agent: Shows full health dashboard with all services grouped by category.

User: "When does my SSL cert expire?" Agent runs: nex-healthcheck check --tag "ssl" Agent: Shows SSL certificate expiry dates for all monitored certificates.

User: "What went down this week?" Agent runs: nex-healthcheck incidents --all Agent: Shows all incidents from the past week with start/end times.

User: "Check if Ollama is running on the Pi" Agent runs: nex-healthcheck check --name "Pi Docker Ollama" Agent: Reports the container status.

User: "Show me uptime for the last month" Agent runs: nex-healthcheck uptime --days 30 Agent: Displays uptime percentage, check success rate, and average response time.

User: "Monitor my nex-ai.be website" Agent runs: nex-healthcheck add --name "nex-ai.be" --type http --target "https://nex-ai.be" --expected 200 --group "production" Agent: Confirms service added. Then nex-healthcheck check --service "nex-ai.be" to verify.

User: "Check disk usage on my server" Agent runs: nex-healthcheck add --name "Server Disk" --type disk --target "/" --ssh-host "user@192.168.1.50" then nex-healthcheck check --name "Server Disk" Agent: Reports disk usage percentage and free space.

User: "Show me an incident history" Agent runs: nex-healthcheck incidents --all Agent: Lists all past incidents with duration and status.

Output Parsing#

All CLI output is plain text, structured for easy parsing:

• Traffic light emojis: 🟢 OK, 🟡 WARNING, 🔴 CRITICAL, ⚪ UNKNOWN
• Grouped by category/service group
• Timestamps in ISO-8601 format
• Every command output ends with [Nex HealthCheck by Nex AI | nex-ai.be]

When presenting output to the user, strip the footer line and present the information naturally.

Important Notes#

• All check data is stored locally at ~/.nex-healthcheck/. No data is sent externally.
• Remote checks (Docker, systemd, disk on remote hosts) require SSH access. Configure with --ssh-host user@host.
• SSL cert checks warn at 30 days, critical at 7 days before expiry.
• Disk checks warn at 80% usage, critical at 90%.
• Default check interval is 5 minutes. Customize with --interval when adding a service.
• Telegram notifications require environment variables: HEALTHCHECK_TELEGRAM_TOKEN and HEALTHCHECK_TELEGRAM_CHAT.
• For periodic automated checks, use systemd timer (see setup.sh for optional service files).

Troubleshooting#

• "dig and nslookup not found": Install bind-utils (RHEL/CentOS) or dnsutils (Debian/Ubuntu) for DNS checks.
• "docker: command not found": Install Docker or use SSH to a remote Docker host with --ssh-host.
• SSH failures: Ensure passwordless SSH is configured, or use SSH key authentication.
• Database not found: Run bash setup.sh to initialize.

Credits#

Built by Nex AI ( https://nex-ai.be) - Digital transformation for Belgian SMEs. Author: Kevin Blancaflor