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© Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

2. 4/6/2019 6:34 AM
P4029
Leveraging Azure’s Instance Metadata for instance bootstrap and runtime
Hariharan Jayaraman
Senior Program Manager
© Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

3. Beyond the VM!

4. APPLICATION CUSTOMIZATION
VM CUSTOMIZATION
CLUSTER SETUP
CONTAINER PLACEMENT
CLOUD DETECTION
RESOURCE
MANAGEMENT
CUSTOMER SUPPORT
AGENT SERVER CONNECTION
PLANNED MAINTENANCE
NETWORK DISCOVERY
APPLICATION TELEMETRY
NETWORK SETUP

5. Challenges today
All data regarding VM are behind an authenticated channel
Customizations needs to be passed during creation
Ability to know JIT information about maintenance events are not present
Telemetry around your Apps doesn’t have a unique per VM identifier …

6. What is Instance Metadata Service, and how can it help?

7. Instance Metadata Overview
Virtual Machine
Information about the VMs’ Compute/Network/ upcoming maintenance
REST Interface exposed to all Azure Resource Manager created VMs
Only available to VM instance via non routable IP
No additional auth needed to get VM information
REST call on
Instance Metadata Service

8. Instance Metadata quick look

9. Semantics… RESTful Supports both JSON and TEXT responses
Requires request headers
Versioned
Discoverable
GET interface

10. So where can I use it ?

11. Cluster setup Which Racks are the VMs in ? FaultDomain
Call Metadata Service
Learn more here -

12. Rack Aware Cassandra Demo

13. Support Call Contoso Service on the VM is not working
Information regarding VM and Network present in Metadata Service
Need information regarding VM Size, image, version information etc …
Call Metadata Service to get information for support

14. Support call demo

15. Managing planned downtime for your setup
Master
Slave
Application accessing database
Maintenance

16. Leverage Scheduled Events
Scheduled Events is a part of Metadata Service in Azure
Provides Just In Time information for upcoming planned maintenance
RESTful call to know if there are upcoming maintenance events
Get upto 15 min to do In VM actions before the action takes place

17. MySQL failover on reboot event

18. Where is it available?

19. Service Release Map
Currently Available in Public Preview in West Central US Region
Send us feedback.azure.com or
We are working hard to meet Service goals and will make the service Generally available in the upcoming months

20. Learn More Metadata Service docs Scheduled Events docs
Scheduled Events docs

21. Code Samples Getting all the metadata
curl -H Metadata:true
Getting publicIP for a VM
curl -H Metadata:true

22. Github and samples Scheduled events logging
Cassandra node setup for rack awareness

23. What is in the Road Map?
Some of the fields that we are working on for future releases …
Fields
Details
SubscriptionID
Azure Subscription the VM is under
ResourceGroup
Azure Resource Group the VM is under
Custom_data
Custom data associated with the VM
Tags
VM tags
Plan information
Azure Marketplace Virtual Machine plan
sshpublic key
Public key
VM Storage information
Disk layout information
AccessTokens
Managed Service Identity information via Metadata …
Want to see a new field send us feedback at feedback.azure.com

24. 4/6/2019 6:34 AM
© Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.