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).

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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.

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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.

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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.

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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).

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Extra Column with Host Actions

Adds a dedicated Extra column before the Host column in all monitoring view tables. Each row gets up to four icon buttons:

Button	Color	Action
Screen icon	Amber	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
Clipboard icon	Green	Copies the host IP address to clipboard (shown only when available)

The IP address is read from the tooltip Checkmk places on the hostname cell. Clicking any clipboard button briefly turns it green to confirm the copy.

Applies to: view.py host and service views.

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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.

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"Configure in WATO" Menu

Adds a Select hosts (N) dropdown and an Open button to the monitoring view menu bar. Select a page of hosts, then click Open — WATO opens 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)
• Open button is disabled (gray) until a page is selected; turns blue when active; resets after opening
• Only visible for users with WATO configuration access

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

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Auto-check "Activate Foreign Changes"

On the Activate pending changes page, automatically checks the Activate foreign changes checkbox as soon as the page is ready, so you never have to remember to tick it manually before activating.

Applies to: wato.py?mode=changelog (with or without sidebar).

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Collapse All / Expand All

Adds two buttons to the top menu bar on any page with expandable sections:

Button	Color	Action
Collapse All	Orange	Collapses all open accordion sections at once
Expand All	Green	Expands all collapsed accordion sections at once

Works on both host-edit pages (accordion sections are table.nform elements) and ruleset pages (accordion sections are div.foldable elements).

Applies to: edit_host, bulkedit, editfolder, edit_ruleset (with or without sidebar).

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.