====== Runbook: Health Check ======

<WRAP round info>
**Trajanje:** ~5 minuta \\
**Uloga:** PKI operator \\
**Učestalost:** Dnevno (preporučeno: ujutro)
</WRAP>

----

===== Workflow =====

<mermaid>
flowchart LR
    subgraph CHECKS["🔍 PROVJERE"]
        C1[Dostupnost CA]
        C2[Valjanost CRL-a]
        C3[OCSP status]
        C4[Certifikati koji ističu]
        C5[Prostor na disku]
    end

    subgraph STATUS["📊 STATUS"]
        S1{OK?}
        S2[Dashboard]
    end

    subgraph ACTION["⚡ AKCIJA"]
        A1[Kreiranje ticketa]
        A2[Eskalacija]
    end

    C1 --> S1
    C2 --> S1
    C3 --> S1
    C4 --> S1
    C5 --> S1
    S1 -->|Da| S2
    S1 -->|Ne| A1
    A1 -->|Kritično| A2

    style S1 fill:#fff3e0
    style A2 fill:#ffebee
</mermaid>

----

===== Brza provjera (1 naredba) =====

<code bash>
#!/bin/bash
# pki-health-check.sh - Dnevna PKI provjera

echo "=== PKI Health Check $(date -Iseconds) ==="

# 1. Provjera CA certifikata
echo -e "\n[1] CA certifikati:"
for ca in /etc/pki/CA/ca-*.pem; do
    days=$(( ($(openssl x509 -enddate -noout -in "$ca" | cut -d= -f2 | date -f - +%s) - $(date +%s)) / 86400 ))
    status="OK"
    [ "$days" -lt 365 ] && status="UPOZORENJE"
    [ "$days" -lt 90 ] && status="KRITIČNO"
    echo "  $(basename $ca): $days dana [$status]"
done

# 2. Valjanost CRL-a
echo -e "\n[2] CRL status:"
for crl in /var/www/pki/*.crl; do
    next=$(openssl crl -in "$crl" -nextupdate -noout 2>/dev/null | cut -d= -f2)
    if [ -n "$next" ]; then
        days=$(( ($(date -d "$next" +%s) - $(date +%s)) / 86400 ))
        status="OK"
        [ "$days" -lt 3 ] && status="UPOZORENJE"
        [ "$days" -lt 1 ] && status="KRITIČNO"
        echo "  $(basename $crl): $days dana do ažuriranja [$status]"
    fi
done

# 3. OCSP responder
echo -e "\n[3] OCSP responder:"
ocsp_status=$(curl -s -o /dev/null -w "%{http_code}" http://ocsp.example.com/status)
[ "$ocsp_status" = "200" ] && echo "  Status: OK" || echo "  Status: GREŠKA ($ocsp_status)"

# 4. Certifikati koji ističu (30 dana)
echo -e "\n[4] Certifikati koji ističu (<30 dana):"
count=$(find /etc/ssl/certs -name "*.pem" -exec openssl x509 -checkend 2592000 -noout -in {} \; 2>/dev/null | grep -c "will expire")
echo "  Broj: $count"

# 5. Prostor na disku
echo -e "\n[5] Prostor na disku:"
df -h /etc/pki /var/log | tail -n +2

echo -e "\n=== Kraj Health Check-a ==="
</code>

----

===== Detaljne provjere =====

==== 1. CA certifikati ====

<code bash>
# Valjanost Root-CA
openssl x509 -in /etc/pki/CA/root-ca.pem -enddate -noout
# Očekivani rezultat: > 10 godina

# Valjanost Intermediate-CA
openssl x509 -in /etc/pki/CA/intermediate-ca.pem -enddate -noout
# Očekivani rezultat: > 2 godine

# Provjera lanca certifikata
openssl verify -CAfile /etc/pki/CA/root-ca.pem /etc/pki/CA/intermediate-ca.pem
# Očekivani rezultat: OK
</code>

**Pragovi:**

| Tip CA | Upozorenje | Kritično |
|--------|------------|----------|
| Root-CA | < 5 godina | < 2 godine |
| Intermediate-CA | < 1 godina | < 6 mjeseci |

----

==== 2. Valjanost CRL-a ====

<code bash>
# CRL metapodaci
openssl crl -in /var/www/pki/crl.pem -text -noout | head -20

# Provjera Next Update
openssl crl -in /var/www/pki/crl.pem -nextupdate -noout

# Dohvat CRL-a s CDP-a
curl -s http://crl.example.com/crl.der | openssl crl -inform DER -text -noout
</code>

**Pragovi:**

| Metrika | Upozorenje | Kritično |
|---------|------------|----------|
| Next Update | < 3 dana | < 1 dan |
| Veličina CRL-a | > 10 MB | > 50 MB |

----

==== 3. OCSP responder ====

<code bash>
# Dostupnost OCSP-a
curl -s -o /dev/null -w "HTTP: %{http_code}, Vrijeme: %{time_total}s\n" http://ocsp.example.com/status

# OCSP odgovor za test certifikat
openssl ocsp \
    -issuer /etc/pki/CA/intermediate-ca.pem \
    -cert /etc/ssl/certs/test.pem \
    -url http://ocsp.example.com \
    -resp_text
# Očekivani rezultat: "Cert Status: good" (ili "revoked" ako je opozvan)
</code>

**Pragovi:**

| Metrika | Upozorenje | Kritično |
|---------|------------|----------|
| Vrijeme odziva | > 500ms | > 2s |
| HTTP status | != 200 | Timeout |

----

==== 4. Certifikati koji ističu ====

<code bash>
# Server certifikati (30 dana)
find /etc/ssl/certs -name "*.pem" -exec sh -c '
    if openssl x509 -checkend 2592000 -noout -in "$1" 2>/dev/null | grep -q "will expire"; then
        echo "ISTIČE: $1"
    fi
' _ {} \;

# CA certifikati (1 godina)
for ca in /etc/pki/CA/*.pem; do
    if openssl x509 -checkend 31536000 -noout -in "$ca" 2>/dev/null | grep -q "will expire"; then
        echo "CA UPOZORENJE: $ca"
    fi
done
</code>

<code powershell>
# PowerShell: Certifikati koji ističu
Get-ChildItem Cert:\LocalMachine\My | Where-Object {
    $_.NotAfter -lt (Get-Date).AddDays(30)
} | Format-Table Subject, NotAfter, Thumbprint -AutoSize
</code>

----

==== 5. Sistemski resursi ====

<code bash>
# Prostor na disku za PKI direktorije
df -h /etc/pki /var/log/pki /var/www/pki

# Veličina log datoteka
du -sh /var/log/pki/*

# Procesi
ps aux | grep -E "(ocsp|openssl)"
</code>

**Pragovi:**

| Resurs | Upozorenje | Kritično |
|--------|------------|----------|
| Zauzeće diska | > 80% | > 95% |
| Veličina logova | > 1 GB | > 5 GB |

----

===== Automatizacija =====

==== Cron Job ====

<code bash>
# /etc/cron.d/pki-health-check
# Dnevno u 08:00
0 8 * * * root /usr/local/bin/pki-health-check.sh | mail -s "PKI Health Check $(date +%Y-%m-%d)" pki-team@example.com
</code>

==== Prometheus Exporter (Opcionalno) ====

<code yaml>
# prometheus-pki-exporter.yml
- job_name: 'pki'
  static_configs:
    - targets: ['pki-server:9115']
  metrics_path: /probe
  params:
    module: [certificate]
</code>

----

===== Predložak nadzorne ploče =====

| Metrika | Status | Vrijednost | Prag |
|---------|--------|------------|------|
| Valjanost Root-CA | 🟢 | 15 godina | > 5 godina |
| Valjanost Intermediate-CA | 🟡 | 8 mjeseci | > 1 godina |
| CRL Next Update | 🟢 | 5 dana | > 3 dana |
| OCSP odziv | 🟢 | 120ms | < 500ms |
| Certifikati koji ističu | 🟡 | 3 | 0 |
| Disk /etc/pki | 🟢 | 45% | < 80% |

**Legenda:**
  * 🟢 OK
  * 🟡 Upozorenje
  * 🔴 Kritično

----

===== Matrica eskalacije =====

| Nalaz | Akcija | Vremenski okvir |
|-------|--------|-----------------|
| CA < 6 mjeseci | Planiranje obnove CA | 1 tjedan |
| CRL istekao | Hitna obnova CRL-a | 1 sat |
| OCSP nedostupan | Ponovno pokretanje respondera | 30 min |
| > 10 certifikata ističe | Sprint obnove | 1 dan |
| Disk > 95% | Rotacija/brisanje logova | Odmah |

----

===== Povezani runbookovi =====

  * [[.:zertifikat-erneuern|Obnova certifikata]] – Za certifikate koji ističu
  * [[..:monitoring:ablauf-monitoring|Monitoring isteka]] – Automatizirani nadzor
  * [[..:monitoring:alerting-setup|Alerting Setup]] – Obavijesti

----

<< [[.:zertifikat-widerrufen|← Opoziv certifikata]] | [[..:start|→ Operator scenariji]] >>

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//Wolfgang van der Stille @ EMSR DATA d.o.o. - Post-Quantum Cryptography Professional//

{{tag>runbook health-check monitoring operator}}