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Managing Infracost

Name: Managing Infracost
Author: cloudthinker-ai

Use when working with Infracost — infracost Terraform cost estimation and FinOps policy enforcement. Covers cost breakdown by resource, diff analysis between plan changes, CI/CD integration checks, policy validation, and cost forecasting. Use when estimating infrastructure cost impact, reviewing Terraform changes, or enforcing cost guardrails.

cloudthinker-ai0 스타2026. 3. 23.

직업
카테고리: 금융 및 투자

스킬 내용

Infracost Management Skill

Estimate and manage Terraform infrastructure costs with Infracost.

MANDATORY: Discovery-First Pattern

Always verify Infracost installation and configuration before running estimates.

Phase 1: Discovery

#!/bin/bash

echo "=== Infracost Version ==="
infracost --version 2>/dev/null

echo ""
echo "=== Configuration ==="
infracost configure get api_key 2>/dev/null && echo "API key: configured" || echo "API key: NOT configured"
infracost configure get pricing_api_endpoint 2>/dev/null
infracost configure get currency 2>/dev/null || echo "Currency: USD (default)"

echo ""
echo "=== Terraform Project Detection ==="
find . -name "*.tf" -maxdepth 3 -exec dirname {} \; | sort -u | head -20

Core Helper Functions

관련 스킬

Managing Infracost | Skills Pool

#!/bin/bash

infracost_breakdown() {
    local path="${1:-.}"
    local format="${2:-json}"
    infracost breakdown --path "$path" --format "$format" 2>/dev/null
}

infracost_diff() {
    local path="${1:-.}"
    local compare="${2:-}"
    if [ -n "$compare" ]; then
        infracost diff --path "$path" --compare-to "$compare" --format json 2>/dev/null
    else
        infracost diff --path "$path" --format json 2>/dev/null
    fi
}

#!/bin/bash
TF_PATH="${1:-.}"

echo "=== Infrastructure Cost Breakdown ==="
infracost breakdown --path "$TF_PATH" --format json 2>/dev/null | jq -r '
    .projects[0].breakdown.resources[] |
    "\(.name)\t$\(.monthlyCost // "0.00")/mo\t\(.resourceType)"
' | sort -t'$' -k2 -rn | column -t | head -25

echo ""
echo "=== Total Monthly Cost ==="
infracost breakdown --path "$TF_PATH" --format json 2>/dev/null | jq '{
    totalMonthlyCost: .totalMonthlyCost,
    totalHourlyCost: .totalHourlyCost,
    resourceCount: (.projects[0].breakdown.resources | length),
    currency: .currency
}'

#!/bin/bash
TF_PATH="${1:-.}"
BASELINE="${2:-infracost-base.json}"

echo "=== Cost Diff Analysis ==="
if [ -f "$BASELINE" ]; then
    infracost diff --path "$TF_PATH" --compare-to "$BASELINE" --format json 2>/dev/null | jq '{
        totalMonthlyCostBefore: .projects[0].diff.totalMonthlyCost,
        totalMonthlyCostAfter: .totalMonthlyCost,
        diffTotalMonthlyCost: .diffTotalMonthlyCost,
        summary: .summary
    }'
else
    echo "No baseline found. Generating baseline..."
    infracost breakdown --path "$TF_PATH" --format json --out-file "$BASELINE" 2>/dev/null
    echo "Baseline saved to $BASELINE. Run again after making changes."
fi

echo ""
echo "=== Changed Resources ==="
infracost diff --path "$TF_PATH" --compare-to "$BASELINE" --format json 2>/dev/null | jq -r '
    .projects[0].diff.resources[]? |
    select(.diff != null) |
    "\(.name)\tBefore: $\(.monthlyCostBefore // "0")\tAfter: $\(.monthlyCostAfter // "0")\tDiff: $\(.diff.totalMonthlyCost // "0")"
' | column -t | head -15

#!/bin/bash
TF_PATH="${1:-.}"
POLICY_FILE="${2:-infracost-policy.rego}"

echo "=== Cost Policy Evaluation ==="
if [ -f "$POLICY_FILE" ]; then
    infracost breakdown --path "$TF_PATH" --format json 2>/dev/null \
        | infracost comment --format json --policy-path "$POLICY_FILE" --dry-run 2>/dev/null
else
    echo "No policy file found. Running basic cost checks..."
    RESULT=$(infracost breakdown --path "$TF_PATH" --format json 2>/dev/null)
    TOTAL=$(echo "$RESULT" | jq -r '.totalMonthlyCost // "0"')
    echo "Total monthly cost: \$$TOTAL"
    echo ""
    echo "=== Expensive Resources (>$100/mo) ==="
    echo "$RESULT" | jq -r '
        .projects[].breakdown.resources[] |
        select((.monthlyCost // "0" | tonumber) > 100) |
        "\(.name)\t$\(.monthlyCost)/mo\t\(.resourceType)"
    ' | sort -t'$' -k2 -rn | column -t | head -15
fi

#!/bin/bash
TF_PATH="${1:-.}"

echo "=== Generating CI Comment ==="
infracost breakdown --path "$TF_PATH" --format json --out-file /tmp/infracost-report.json 2>/dev/null

echo ""
echo "=== Cost Summary for PR ==="
jq '{
    total_monthly: .totalMonthlyCost,
    total_hourly: .totalHourlyCost,
    projects: [.projects[] | {
        name: .metadata.path,
        monthly_cost: .breakdown.totalMonthlyCost,
        resource_count: (.breakdown.resources | length)
    }]
}' /tmp/infracost-report.json

echo ""
echo "=== Top 5 Costliest Resources ==="
jq -r '.projects[].breakdown.resources[] |
    "\(.name)\t$\(.monthlyCost // "0")/mo"
' /tmp/infracost-report.json | sort -t'$' -k2 -rn | head -5

#!/bin/bash
CONFIG_FILE="${1:-infracost.yml}"

echo "=== Multi-Project Cost Report ==="
if [ -f "$CONFIG_FILE" ]; then
    infracost breakdown --config-file "$CONFIG_FILE" --format json 2>/dev/null | jq -r '
        .projects[] | "\(.metadata.path)\t$\(.breakdown.totalMonthlyCost // "0")/mo\tResources: \(.breakdown.resources | length)"
    ' | column -t
else
    echo "No config file found. Scanning subdirectories..."
    for dir in $(find . -name "*.tf" -maxdepth 3 -exec dirname {} \; | sort -u); do
        COST=$(infracost breakdown --path "$dir" --format json 2>/dev/null | jq -r '.totalMonthlyCost // "0"')
        echo "$dir: \$$COST/mo"
    done | head -15
fi

Managing Infracost Report
═════════════════════════
Resources discovered: [count]

Resource       Status    Key Metric    Issues
──────────────────────────────────────────────
[name]         [ok/warn] [value]       [findings]

Summary: [total] resources | [ok] healthy | [warn] warnings | [crit] critical
Action Items: [list of prioritized findings]

Shortcut	Counter	Why
"I'll skip discovery and check known resources"	Always run Phase 1 discovery first	Resource names change, new resources appear — assumed names cause errors
"The user only asked for a quick check"	Follow the full discovery → analysis flow	Quick checks miss critical issues; structured analysis catches silent failures
"Default configuration is probably fine"	Audit configuration explicitly	Defaults often leave logging, security, and optimization features disabled
"Metrics aren't needed for this"	Always check relevant metrics when available	API/CLI responses show current state; metrics reveal trends and intermittent issues
"I don't have access to that"	Try the command and report the actual error	Assumed permission failures prevent useful investigation; actual errors are informative

Managing Infracost

Infracost Management Skill

MANDATORY: Discovery-First Pattern

Phase 1: Discovery

Core Helper Functions

Managing Infracost

Infracost Management Skill

MANDATORY: Discovery-First Pattern

Phase 1: Discovery

Core Helper Functions

Output Rules

Common Operations

Cost Breakdown by Resource

Diff Analysis (Plan Cost Impact)

Policy Check (Cost Guardrails)

CI Integration Output

Multi-Project Cost Report

Safety Rules

Output Format

Anti-Hallucination Rules

Counter-Rationalizations

Common Pitfalls

Llm Trading Agent Security

Energy Procurement

Council

Carrier Relationship Management

Market Research

Market Research