citrix-environment-diagnostics

This skill provides guidance for comprehensive Citrix environment health assessments, including VDA status, Delivery Controller health, StoreFront availability, and overall infrastructure diagnostics.

When performing Citrix environment diagnostics:

1. Verify Connectivity and Access

```powershell

# Load Citrix PowerShell snap-ins

Add-PSSnapin Citrix.* -ErrorAction SilentlyContinue

# Test connection to Delivery Controller

Get-BrokerSite

```

• Confirm PowerShell access to Delivery Controllers
• Validate administrative permissions
• Check network connectivity to all components

2. Assess VDA Registration Status

```powershell

# Get overall VDA registration summary

Get-BrokerMachine -MaxRecordCount 10000 |

Group-Object RegistrationState |

Select Name, Count

# List unregistered VDAs with details

Get-BrokerMachine -RegistrationState Unregistered |

Select DNSName, CatalogName, LastConnectionFailure, LastDeregistrationReason

# Check VDA load distribution

Get-BrokerMachine -RegistrationState Registered |

Select DNSName, LoadIndex, SessionCount |

Sort LoadIndex -Descending

```

Key metrics to verify:

• Registration rate should be >95%
• Load index should be <8000 for healthy VDAs
• Check for patterns in failed registrations

3. Verify Delivery Controller Health

```powershell

# Check controller status

Get-BrokerController | Select MachineName, State, DesktopsRegistered

# Verify site database connectivity

Get-BrokerSite | Select Name, ConfigurationLoggingDatabaseName

# Check broker service status

Get-BrokerServiceStatus

```

Validate:

• All controllers showing "Active" state
• Database connections established
• Services running on all controllers

4. Assess StoreFront Status

```powershell

# On StoreFront server - check store status

Get-STFDeployment

Get-STFStoreService | Select FriendlyName, VirtualPath

# Verify authentication methods

Get-STFAuthenticationService | Select FriendlyName, VirtualPath

```

Check:

• Store accessibility from client networks
• Authentication provider configuration
• SSL certificate validity

5. Review Session and Resource Utilization

```powershell

# Active session count

Get-BrokerSession -MaxRecordCount 10000 | Measure-Object

# Sessions by delivery group

Get-BrokerSession -MaxRecordCount 10000 |

Group-Object DesktopGroupName |

Select Name, Count |

Sort Count -Descending

# Machine utilization by catalog

Get-BrokerMachine -MaxRecordCount 10000 |

Group-Object CatalogName |

ForEach-Object {

[PSCustomObject]@{

Catalog = $_.Name

Total = $_.Count

Registered = ($_.Group | Where-Object {$_.RegistrationState -eq 'Registered'}).Count

InUse = ($_.Group | Where-Object {$_.SessionCount -gt 0}).Count

}

}

```

6. Check Licensing Status

```powershell

# Get license server information

Get-BrokerSite | Select LicenseServerName, LicenseServerPort

# Check license usage (requires License Server access)

Get-LicInventory -LicenseServerAddress -LicenseServerPort 27000

```

7. Document and Report Findings

After completing diagnostics:

1. Summary: Overall environment health status
2. Issues Identified: List any problems found
3. Metrics: Key performance indicators
4. Recommendations: Remediation steps for any issues
5. Next Steps: Follow-up actions required

| Component | Healthy | Warning | Critical |

|-----------|---------|---------|----------|

| VDA Registration | >98% | 95-98% | <95% |

| Load Index | <5000 | 5000-8000 | >8000 |

| Controller State | All Active | 1 Inactive | Multiple Inactive |

| DB Response | <100ms | 100-500ms | >500ms |

• VDA Registration Failures: Time sync, firewall, DNS resolution
• High Load Index: Resource contention, runaway processes
• Controller Issues: Service failures, database connectivity
• StoreFront Problems: Certificate expiry, IIS configuration

For detailed information, refer to:

• citrix-knowledge/domain-knowledge/comprehensive-citrix-knowledge.md
• citrix-knowledge/runbooks/ for step-by-step procedures
• citrix-knowledge/troubleshooting/ for common issue resolutions