Checkmk SwissKnife

A Tampermonkey userscript that enhances the Checkmk 2.3.x web interface with quality-of-life improvements for WATO configuration and monitoring views.

Installation

1. Install the Tampermonkey browser extension.

2. Click Install script below (or open the raw .user.js URL):

   Install Checkmk SwissKnife

3. Tampermonkey will detect the @downloadURL and prompt for updates automatically.

Compatibility: Checkmk 2.3.x · Chrome · Firefox · Edge

Features

Folder Path Search

Replaces the default WATO folder dropdown with a searchable overlay. Type any segment of the folder path to filter — separators >, ›, and / are treated as equivalent.

Applies to: rule condition editor (explicit_conditions_p_folder_path) and monitoring view folder filter (wato_folder).

---

Accordion Badge Counts

Displays inline counters in each accordion section header on host edit pages:

Badge	Meaning
orange (N)	N checkboxes enabled in this section
blue ↑N	N values inherited from a parent folder
red ≠N	N values that differ from the folder default (bulk edit only)

Applies to: edit_host, bulkedit, editfolder.

---

Ineffective Rule Highlight

Replaces the low-visibility hyphen icon on ineffective rules with a prominent ⚠ ineffective badge and adds an amber left border to the row.

Applies to: mode=edit_ruleset.

---

Rule Match Status Highlight

When a ruleset is opened in context (URL contains host= and/or service=), colors each rule row:

• Green + ✓ match — rule applies to the given host/service
• Dimmed + ✗ no match — rule does not apply

Applies to: mode=edit_ruleset with host/service context.

---

Ruleset Filter Toggle

After match/ineffective highlighting runs, a "Relevant only" button appears above the rule list. Clicking it hides all non-highlighted rows and empty folders, leaving only the rules that matter for the current context.

Applies to: mode=edit_ruleset (when at least one highlighted row exists).

---

Inventory Buttons on Monitoring Views

Adds three icon buttons before each hostname in monitoring view tables:

Button	Action
Screen icon	Opens Service Discovery for the host in a new tab
Clipboard icon (blue)	Copies the full FQDN to clipboard
Clipboard icon (purple)	Copies the short hostname (first label) to clipboard

Applies to: view.py host and service views.

---

Monitor Button on WATO Folder Pages

Adds a green eye icon next to each active (non-disabled) host in WATO folder listings, opening the host's monitoring view in a new tab. A summary badge on the section header shows monitored vs disabled host counts.

Applies to: wato.py?mode=folder.

---

"Configure in WATO" Menu

Adds a paginated dropdown + Open button to the monitoring view menu bar. Selecting a page and clicking Open launches WATO in a new tab with exactly those hosts pre-filtered via regex search — ready for bulk configuration.

• Up to 50 hosts per page (keeps URLs within safe length limits)
• Deduplicates hostnames automatically (useful on service views where hosts repeat)
• Only visible for users with WATO configuration access

Applies to: view.py (admin/configuration role required).

How it works

The script injects enhancements at page load and re-applies them on SPA navigation (Checkmk reloads content inside an <iframe> without a full page reload). Each feature is independent — a feature that does not apply to the current page does nothing and stops polling.

License

CC BY-NC 4.0 — free to use, share, and adapt for non-commercial purposes. Commercial use or resale is not permitted.