Cloud monitoring guide: Monitoring strategy for cloud deployment models
This article includes our recommended monitoring strategy for each of the cloud deployment models, based on the following criteria:
- You must maintain your commitment to Operations Manager or another enterprise monitoring platform, because it's integrated with your IT operations processes, knowledge, and expertise, or certain functionality isn't available yet in Azure Monitor.
- You must monitor workloads both on-premises and in the public cloud, or just in the cloud.
- Your cloud migration strategy includes modernizing IT operations and moving to our cloud monitoring services and solutions.
- You might have critical systems that are air-gapped or physically isolated, or are hosted in a private cloud or on physical hardware, and these systems need to be monitored.
Our strategy includes support for monitoring infrastructure (compute, storage, and server workloads), application (end-user, exceptions, and client), and network resources. It delivers a complete, service-oriented monitoring perspective.
Azure cloud monitoring
Azure Monitor is the Azure native platform service that provides a single source for monitoring Azure resources. It's designed for cloud solutions that:
- Are built on Azure.
- Support a business capability that's based on virtual machine (VM) workloads or complex architectures that use microservices and other platform resources.
It monitors all layers of the stack, starting with tenant services, such as Azure Active Directory Domain Services, and subscription-level events and Azure Service Health.
It also monitors infrastructure resources, such as VMs, storage, and network resources. At the top layer, it monitors your application.
By monitoring these dependencies and collecting the right signals that each dependency can emit, you get the observability of applications and the key infrastructure you need.
Our recommended approach to monitoring each layer of the stack is summarized in the following table:
|Azure resources - platform as a service (PaaS)||Azure database services (for example, SQL or MySQL).||Azure SQL Database performance metrics.||Enable diagnostics logging to stream SQL data to Azure Monitor Logs.|
|Azure resources - infrastructure as a service (IaaS)||1. Azure Storage
2. Azure load balancing services
3. Network security groups
4. Azure Virtual Machines
5. Azure Kubernetes Service / Azure Container Instances
|1. Capacity, availability, and performance.
2. Performance and diagnostics logs (activity, access, performance, and firewall).
3. Monitor events when rules are applied, and the rule counter for how many times a rule is applied to deny or allow.
4. Monitor capacity, availability, and performance in a guest VM operating system (OS). Map application dependencies hosted on each VM, including the visibility of active network connections between servers, inbound and outbound connection latency, and ports across any TCP-connected architecture.
5. Monitor capacity, availability, and performance of workloads running on containers and container instances.
|Network||Communication between your virtual machine and one or more endpoints (another VM, a fully qualified domain name, a uniform resource identifier, or an IPv4 address).||Monitor reachability, latency, and network topology changes that occur between the VM and the endpoint.||Azure Network Watcher.|
|Azure subscription||Azure Service Health and basic resource health from the perspective of the Azure service.||Delivered in the activity log for monitoring and alerting by using Azure Monitor.|
|Azure tenant||Azure Active Directory||Azure AD audit logs and sign-in logs.||Enable diagnostics logging, and configure streaming to Azure Monitor Logs.|
Hybrid cloud monitoring
For many organizations, transition to the cloud must be approached gradually, where the hybrid cloud model is the most common first step in the journey. You carefully select the appropriate subset of applications and infrastructure to begin your migration, while you avoid disruption to your business. However, because we offer two monitoring platforms that support this cloud model, IT decision makers might be uncertain as to which platform is the best choice to support their business and IT operational goals.
In this section, we address the uncertainty by reviewing several factors and offering an understanding of which platform to consider.
Keep in mind the following key technical aspects:
You need to collect data from Azure resources that support the workload, then forward the data to your existing on-premises or managed service provider tools.
You need to maintain your current investment in System Center Operations Manager, and configure it to monitor IaaS and PaaS resources that are running in Azure. Optionally, because you're monitoring two environments with different characteristics, based on your requirements, you need to determine how integrating with Azure Monitor supports your strategy.
As part of your modernization strategy to standardize on a single tool to reduce cost and complexity, you need to commit to Azure Monitor for monitoring the resources in Azure and on your corporate network.
The following table summarizes the requirements that Azure Monitor and System Center Operations Manager support with monitoring the hybrid cloud model based on a common set of criteria.
|Requirement||Azure Monitor||Operations Manager|
Requires, at a minimum, a management server and a SQL Server instance to host the operational database and the reporting data warehouse database. The complexity increases when high availability and disaster recovery are required, and there are machines in multiple sites, untrusted systems, and other complex design considerations.
|Limited connectivity - no internet or isolated network||No||Yes|
|Limited connectivity - controlled internet access||Yes||Yes|
|Limited connectivity - frequently disconnected||Yes||Yes|
|Configurable health monitoring||No||Yes|
|Web app availability test (isolated network)||Yes, limited
Azure Monitor has limited support in this area and requires custom firewall exceptions.
|Web app availability test (globally distributed)||No||Yes|
|Monitor VM workloads||Yes, limited
Can collect IIS and SQL Server error logs, Windows events, and performance counters. Requires creating custom queries, alerts, and visualizations.
Supports monitoring most of the server workloads with available management packs. Requires either the Log Analytics Windows agent or Operations Manager agent on the VM, reporting back to the management group on the corporate network.
|Monitor Azure IaaS||Yes||Yes
Supports monitoring most of the infrastructure from the corporate network. Tracks availability state, metrics, and alerts for Azure VMs, SQL, and storage via the Azure management pack.
|Monitor Azure PaaS||Yes||Yes, limited
Based on what's supported in the Azure management pack.
|Azure service monitoring||Yes||Yes
Although there's no native monitoring of Azure Service Health provided today through a management pack, you can create custom workflows to query Service Health alerts. Use the Azure REST API to get alerts through your existing notifications.
|Modern web application monitoring||Yes||No|
|Legacy web application monitoring||Yes, limited, varies by SDK
Supports monitoring older versions of .NET and Java web applications.
|Monitor Azure Kubernetes Service containers||Yes||No|
|Monitor Docker or Windows containers||Yes||No|
|Network performance monitoring||Yes||Yes, limited
Supports availability checks, and collects basic statistics from network devices by using the Simple Network Management Protocol (SNMP) from the corporate network.
|Interactive data analysis||Yes||No
Relies on SQL Server Reporting Services canned or custom reports, third-party visualization solutions, or a custom Power BI implementation. There are scale and performance limitations with the Operations Manager data warehouse. Integrate with Azure Monitor Logs as an alternative for data aggregation requirements. You achieve integration by configuring the Log Analytics connector.
|End-to-end diagnostics, root-cause analysis, and timely troubleshooting||Yes||Yes, limited
Supports end-to-end diagnostics and troubleshooting only for on-premises infrastructure and applications. Uses other System Center components or partner solutions.
|Interactive visualizations (dashboards)||Yes||Yes, limited
Delivers essential dashboards with its HTML5 web console or an advanced experience from partner solutions, such as Squared Up and Savision.
|Integration with IT or DevOps tools||Yes||Yes, limited|
Collect and stream monitoring data to third-party or on-premises tools
To collect metrics and logs from Azure infrastructure and platform resources, you need to enable Azure Diagnostics logs for those resources. Additionally, with Azure VMs, you can collect metrics and logs from the guest OS by enabling the Azure Diagnostics extension. To forward the diagnostics data that's emitted from your Azure resources to your on-premises tools or managed service provider, configure Azure Event Hubs to stream the data to them.
Monitor with System Center Operations Manager
Although System Center Operations Manager was originally designed as an on-premises solution to monitor across applications, workloads, and infrastructure components that are running in your IT environment, it evolved to include cloud-monitoring capabilities. It integrates with Azure, Microsoft 365, and Amazon Web Services (AWS). It can monitor across these diverse environments with management packs that are designed and updated to support them.
For customers who have made significant investments in Operations Manager to achieve comprehensive monitoring that's tightly integrated with their IT service management processes and tools, or for customers new to Azure, it's understandable to ask the following questions:
- Can Operations Manager continue to deliver value, and does it make business sense?
- Do the features in Operations Manager make it the right fit for our IT organization?
- Does integrating Operations Manager with Azure Monitor provide the cost-effective and comprehensive monitoring solution that we require?
If you've already invested in Operations Manager, you don't need to focus on planning a migration to replace it immediately. With Azure or other cloud providers that exist as an extension of your own on-premises network, Operations Manager can monitor the guest VMs and Azure resources as if they were on your corporate network. This approach requires a reliable network connection between your network and the virtual network in Azure that has sufficient bandwidth.
To monitor the workloads that are running in Azure, you need:
The System Center Operations Manager management pack for Azure. It collects performance metrics emitted by Azure services such as web and worker roles, Application Insights availability tests (web tests), Azure Service Bus, and so on. The management pack uses the Azure REST API to monitor the availability and performance of these resources. Some Azure service types have no metrics or predefined monitors in the management pack, but you can still monitor them through the relationships defined in the Azure management pack for discovered services.
The management pack for Azure SQL Database to monitor the availability and performance of Azure SQL databases and Azure SQL Database instances using the Azure REST API and T-SQL queries to SQL Server system views.
To monitor the guest OS and workloads that are running on the VM, such as SQL Server, IIS, or Apache Tomcat, you need to download and import the management pack that supports the application, service, and OS.
Knowledge is defined in the management pack, which describes how to monitor the individual dependencies and components. Both Azure management packs require performing a set of configuration steps in Azure and Operations Manager before you can begin monitoring these resources.
For any web application that can be reached externally, you should enable a type of synthetic transaction known as availability monitoring. It's important to know whether your application or a critical HTTP/HTTPS endpoint that your application relies on, is available and responsive. With Application Insights availability monitoring, you can run tests from multiple Azure datacenters and provide insight into the health of your application from a global perspective.
Although Operations Manager is capable of monitoring resources that are hosted in Azure, there are several advantages to including Azure Monitor, because its strengths overcome the limitations in Operations Manager and can establish a strong foundation to support eventual migration from it. Here we review those strengths and limitations, with our recommendation to include Azure Monitor in your hybrid monitoring strategy.
Disadvantages of using Operations Manager by itself
Analyzing monitoring data in Operations Manager is commonly performed by using predefined views that are provided by management packs accessed from the console, from SQL Server Reporting Services (SSRS) reports, or from custom views that end users have created. Ad hoc data analysis isn't possible out of the box. Operations Manager reporting is inflexible. The data warehouse that provides long-term retention of the monitoring data doesn't scale or perform well. And expertise in writing T-SQL statements, developing a Power BI solution, or using third-party solutions is required to support the requirements for the various personas in the IT organization.
Alerting in Operations Manager doesn't support complex expressions or include correlation logic. To help reduce noise, alerts are grouped to show the relationships between them and to identify their causes.
Advantages of using Operations Manager with Azure Monitor
Azure Monitor is the way to work around the limitations of Operations Manager. It complements the Operations Manager data warehouse database by collecting important performance and log data. Azure Monitor delivers better analytics, performance (when querying large data volume), and retention than the Operations Manager data warehouse.
With the Azure Monitor Logs query language, you can create much more complex and sophisticated queries. You can run queries across terabytes of data in seconds. You can quickly transform your data into pie charts, time charts, and many other visualizations. To analyze this data, you're no longer constrained by working with Operations Manager reports that are based on SQL Server Reporting Services, custom SQL queries, or other workarounds.
You can deliver an improved alerting experience by implementing the Azure Monitor Alert Management solution. Alerts that are generated in the Operations Manager management group can be forwarded to the Azure Monitor Log Analytics workspace. You can configure the subscription that's responsible for forwarding alerts from Operations Manager to Azure Monitor Logs to forward only certain alerts. For example, you can forward only alerts that meet your criteria for querying in support of problem management for trends, and investigation of the root cause of failures or problems, through a single pane of glass. Additionally, you can correlate other log data from Application Insights or other sources, to gain insight that help improve user experience, increase uptime, and reduce time to resolve incidents.
You can monitor cloud-native infrastructure and applications, from a simple or multitier architecture in Azure using Azure Monitor, and you can use Operations Manager to monitor on-premises infrastructure. This monitoring includes one or more VMs, multiple VMs placed in an availability set or virtual machine scale set, or a containerized application deployed to Azure Kubernetes Service (AKS) that's running on Windows Server or Linux containers.
If you need comprehensive monitoring of Microsoft or third-party workloads running on your Azure VMs, and you have advanced scenarios that cannot be evaluated based on log or performance data alone, use System Center Operations Manager. Its management packs deliver advanced logic, which includes a service and health model, to determine the operational health of the workload.
By using the Map feature of Azure Monitor for VMs, you can monitor standard connectivity metrics from network connections between your Azure VMs and on-premises VMs. These metrics include response time, requests per minute, traffic throughput, and links. You can identify failed connections, troubleshoot, perform migration validation, perform security analysis, and verify the overall architecture of the service. Map can automatically discover application components on Windows and Linux systems, and map the communication between services. This automation helps you identify connections and dependencies you were unaware of, plan and validate migration to Azure, and minimize speculation during incident resolution.
By using Network Performance Monitor, you can monitor the network connectivity between:
Your corporate network and Azure.
Mission-critical multitier applications and microservices.
User locations and web-based applications (HTTP/HTTPS).
This strategy delivers visibility of the network layer, without the need for SNMP. It can also present, in an interactive topology map, the hop-by-hop topology of routes between the source and destination endpoint. It's a better choice than attempting to accomplish the same result with network monitoring in Operations Manager or with other network monitoring tools currently used in your environment.
Monitor with Azure Monitor
Although a migration to the cloud presents numerous challenges, it also provides opportunities. It enables your organization to migrate from one or more on-premises enterprise monitoring tools to not only potentially reduce capital expenditures and operating costs, but also to benefit from the advantages that a cloud monitoring platform such as Azure Monitor can deliver at cloud scale. Examine your monitoring and alerting requirements, configuration of existing monitoring tools, and workloads transitioning to the cloud. After your plan is finalized, configure Azure Monitor.
Monitor the hybrid infrastructure and applications, from a simple or multitier architecture where components are hosted between Azure, other cloud providers, and your corporate network. The components might include one or more VMs, multiple VMs placed in an availability set or virtual machine scale set, or a containerized application that's deployed to Azure Kubernetes Service (AKS) running on Windows Server or Linux containers.
Use Azure Arc to prepare your servers, virtual machines, Kubernetes clusters, and databases across your environment for management as if they are running in Azure. Azure Arc delivers consistent inventory, management, governance, and security with familiar Azure services and management capabilities.
Enable Azure Monitor for VMs, Azure Monitor for containers, and Application Insights to detect and diagnose issues between infrastructure and applications. For a more thorough analysis and correlation of data collected from the multiple components or dependencies supporting the application, you need to use Azure Monitor Logs.
Create intelligent alerts that apply to a core set of applications and service components, help reduce alert noise with dynamic thresholds for complex signals, and use alert aggregation based on machine learning algorithms to help identify the issue quickly.
Define a library of queries and dashboards to support the requirements of the various personas in the IT organization.
Define standards and methods for enabling monitoring across the hybrid and cloud resources, a monitoring baseline for each resource, alert thresholds, and so on.
Configure Azure role-based access control (Azure RBAC) so you grant users and groups only the access required to monitor data from the resources they manage.
Include automation and self-service to enable each team to create, enable, and tune their monitoring and alerting configurations as needed.
Private cloud monitoring
You can achieve holistic monitoring of Azure Stack with System Center Operations Manager. Specifically, you can monitor the workloads that are running in the tenant, the resource level, on the virtual machines, and the infrastructure hosting Azure Stack (physical servers and network switches).
You can also achieve holistic monitoring with a combination of infrastructure monitoring capabilities that are included in Azure Stack. These capabilities help you view health and alerts for an Azure Stack region and the Azure Monitor service in Azure Stack, which provides base-level infrastructure metrics and logs for most services.
If you've already invested in Operations Manager, use the Azure Stack management pack to monitor the availability and health state of Azure Stack deployments, including regions, resource providers, updates, update runs, scale units, unit nodes, infrastructure roles, and their instances (logical entities comprised of the hardware resources). This management pack uses the health and update resource provider REST APIs to communicate with Azure Stack. To monitor physical servers and storage devices, use the OEM vendors' management pack (for example, provided by Lenovo, HPE, or Dell). Operations Manager can natively monitor the network switches to collect basic statistics by using SNMP. Monitoring the tenant workloads is possible with the Azure management pack by following two basic steps. Configure the subscription that you want to monitor, and then add the monitors for that subscription.
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