Introduction

Azure shared disk cannot be attached to multiple VMs when cluster awareness not configured. This guide provides step-by-step diagnosis and resolution.

Symptoms

Typical error output:

bash
Error: Azure operation failed
Check Azure portal for detailed error message
az resource show --resource-group <rg> --name <name>

Common Causes

  1. 1.Resource configuration mismatch
  2. 2.Azure subscription quota or policy limitations
  3. 3.Network connectivity or firewall restrictions
  4. 4.Missing permissions or RBAC assignments

Step-by-Step Fix

Step 1: Check Current State

bash
az resource show --resource-group <resource-group> --name <name> --resource-type <type>
az monitor activity-log list --resource-group <rg> --caller <caller>
az network diagnostic-settings show --resource <resource-id>

Step 2: Identify Root Cause

bash
az monitor activity-log list --resource-group MyRG --status Failed

Step 3: Apply Primary Fix

```bash # Primary Azure CLI fix az resource update --resource-group MyRG --name MyResource --set properties.<property>=<value>

# Verify the change az resource show --resource-group MyRG --name MyResource ```

Step 4: Apply Alternative Fix

```bash # Alternative fix: Check configuration az resource show --resource-group MyRG --name MyResource -o yaml

# Update specific properties az resource update --resource-group MyRG --name MyResource --set properties.<key>=<value>

# Verify the fix az resource show --resource-group MyRG --name MyResource --query properties.<key> ```

Step 5: Verify the Fix

bash
az resource show --resource-group MyRG --name MyResource
az monitor activity-log list --resource-group MyRG --status Succeeded

Common Pitfalls

  • Forgetting to check quota limits before resize operations
  • Not waiting for async operations to complete before next step
  • Missing RBAC permissions for Azure resource operations
  • Confusing subscription-level and resource-level quotas

Best Practices

  • Always check quota before provisioning new resources
  • Use Azure Resource Health for monitoring
  • Implement proper error handling in Azure CLI scripts
  • Enable diagnostic settings for all critical resources
  • Azure Subscription Quota Exceeded
  • Azure Resource Deployment Failed
  • Azure Network Connectivity Issues
  • Azure RBAC Permission Denied