troubleshoot-consul

troubleshoot-consul is a skill for Claude Code from netdata/skills. It costs 67 tokens per session (2,232 once invoked), scanned A, original, Apache-2.0.

A troubleshooting guide for Consul, a system that tracks services and helps them find and securely communicate with one another. It uses Netdata health data and a structured diagnostic path to investigate Consul server and catalog problems.

In plain words
What is it for?
Use it to investigate Consul alerts and incidents involving unstable leaders, gossip partitions, oversized catalogs, leaked long-polling watches, and expired certificates or certificate authorities.
Why use it?
It helps explain failed writes, stale service information, unstable health checks, slow restarts, resource exhaustion, and certificate failures by tracing them to cluster coordination or configuration issues.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the netdata-skills plugin — 56 skills shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/netdata/skills/troubleshoot-consul
Any agent
npx skills add netdata/skills --skill troubleshoot-consul
Clone the repo
git clone --depth 1 https://github.com/netdata/skills

Made for: Claude Code.

Or install netdata-skills, the plugin that ships this one along with the rest of its 56 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for troubleshoot-consul

README.md
[![agentmods](https://agentmods.dev/badge/skills/netdata/skills/troubleshoot-consul.svg)](https://agentmods.dev/skills/netdata/skills/troubleshoot-consul)
Your own site
<a href="https://agentmods.dev/skills/netdata/skills/troubleshoot-consul"><img src="https://agentmods.dev/badge/skills/netdata/skills/troubleshoot-consul.svg" alt="Measured on agentmods" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,232 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00067 $0.02232
Opus 5 $0.00034 $0.01116
Sonnet 5 $0.00013 $0.00446
Haiku 4.5 $0.00007 $0.00223

Measured 6d ago against content hash 267feab04fd3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

troubleshoot-consul scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/troubleshoot-consul/SKILL.md · 182 lines

How it starts

The opening of the file, as written. The whole thing — 182 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Troubleshoot Consul

When to use this skill

  • Leader instability: The leader cannot commit Raft entries fast enough (disk latency, CPU starvation, network partitions). Repeated elections. All writes fail during elections. Cascading effect: anti-entropy cannot sync, health checks go stale, service discovery returns stale data.
  • Gossip partition / flapping: Network issues cause nodes to oscillate between alive/failed/left states. This creates a storm of catalog deregistrations and re-registrations. Health checks flip. Downstream consumers (load balancers, service meshes) react to every flip, causing traffic storms.
  • Catalog bloat / memory exhaustion: Large numbers of registered services, checks, or KV entries grow unbounded. Snapshots become enormous. Raft replication slows. Server restarts take minutes to hours to restore the snapshot.
  • Blocking query accumulation: Consul's watch mechanism uses HTTP long-polling (blocking queries). Each blocking query holds a goroutine and a connection. Misconfigured or leaked watches accumulate indefinitely. Servers eventually run out of goroutines or file descriptors.
  • Certificate/CA failures: Connect certificates expire without rotation. CA root rotation fails mid-roll. Envoy sidecars reject connections. Silent mutual TLS failures cause intermittent service-to-service communication failures that look like application bugs.
  • Cross-DC WAN degradation: WAN gossip between datacenters degrades silently. Cross-DC service lookups fail or return stale results. Prepared queries that failover across DCs stop working.
  • Any time the user reports a Consul service behaving outside its expected envelope (elevated errors, latency, saturation, resource exhaustion, or unexpected restarts).
  • An on-call engineer is paging on a Netdata alert tied to a Consul instance and wants a structured triage path.

Read the full file on GitHub · 182 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 182 lines · 67 tokens per session scan A 267feab04fd3

Subscribe to this mod's changes

troubleshoot-consul is a skill published in the GitHub repository netdata/skills (2 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 67 tokens to every session and 2,232 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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