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Azure Redis Monitoring Tool
Azure Redis Cache is based on the popular open source Redis cache. It gives you access to a secure, dedicated Redis cache, managed by Microsoft and accessible from any application within Azure. Azure Redis Cache is available in a variety of tiers, (i.e. Basic, Standard, Premium), offering an expanded set of throughput and consistent low-latency data access to power fast, scalable Azure applications.
What You Can Monitor
Opsview Monitor's Azure Redis monitoring tool contains all of the latest service checks to monitor your Redis environment. Opsview helps keep track of performance metrics such as Cache Read, which shows the amount of data read from cache. Cache issues can directly affect server side network bandwidth limits used by this cache.
|Service Check Name||Description||Default Thresholds (Warning, Critical)||UOM|
|Azure - Redis - Cache Bytes||The number of cache read and write bytes per second [Default Timespan = 5mins, Default Check Interval = 5mins]||N/A||B/s|
|Azure - Redis - Cache Requests||The number of cache hits and misses [Default Timespan = 5mins, Default Check Interval = 5mins]||N/A||N/A|
|Azure - Redis - Commands||The number of commands processed [Default Timespan = 5mins, Default Check Interval = 5mins]||N/A||N/A|
|Azure - Redis - Connected Clients||The maximum number of connected clients [Default Timespan = 5mins, Default Check Interval = 5mins]||N/A||N/A|
|Azure - Redis - CPU Usage||The CPU usage as a percentage [Default Timespan = 5mins, Default Check Interval = 5mins]||percent_processor_time=70,90||%|
|Azure - Redis - Keys||The number of keys [Default Timespan = 5mins, Default Check Interval = 5mins]||N/A||N/A|
|Azure - Redis - Memory Usage||The memory usage as a percentage [Default Timespan = 5mins, Default Check Interval = 5mins]||used_memory_percentage=70,90||%|
|Azure - Redis - Memory Used||The memory allocated to Redis (RSS) and used by Redis [Default Timespan = 5mins, Default Check Interval = 5mins]||N/A||B|
|Azure - Redis - Memory Used Ratio||The ratio of memory allocated to Redis to memory being used by Redis [Default Timespan = 5mins, Default Check Interval = 5mins]||N/A||N/A|
|Azure - Redis - Server Load||The maximum percentage load on the server [Default Timespan = 5mins, Default Check Interval = 5mins]||server_load=70,90||%|
NOTE: The "Default Timespan" given for these Service Checks refers to the time period we use when retrieving metrics from Azure.
NOTE: See details about Nagios thresholds here.
Azure Redis Monitoring Tool Prerequisites
The monitoring plugin for this Opspack has been tested with Python 2.7. In order for the Opspack to run, you will need to have some Python packages installed by running the pip python package tool.
If a cryptography error occurs when trying to install the Azure packages, you can run the commands which should fix the problem.
Debian and Ubuntu
sudo apt-get install build-essential libssl-dev libffi-dev python-dev python-pip
CentOS and RHEL
sudo yum install gcc libffi-devel python-devel openssl-devel python-pip
When python-pip is installed, you can then run:
sudo pip install --upgrade pip==9.0.2 sudo pip install --upgrade setuptools sudo pip install --upgrade requests sudo pip install nagiosplugin sudo pip install azure sudo pip install azure-monitor
Setup Azure for Monitoring
To monitor you Azure environment, you need to configure it for monitoring
This requires Administrator access on Azure. You need to retrieve the following credentials:
- Subscription ID
- Tenant/Directory ID
- Client/Application ID
- Secret Key
Step 1: Find Subscription ID
The Subscription ID can be found in the Subscriptions section under the All services section from the Azure dashboard
Step 2 : Find the Tenant/Directory ID
The Tenant/Directory ID can be found in the Azure Active Directory under the Properties section from the Azure dashboard
Step 3: Find the Client/Application ID for your application
You need to create and register your application if you haven't already. Use the following documentation from Microsoft: Create an Azure Active Directory application
The Client/Application ID can be found in Azure Active Directory under the App registrations section from the Azure dashboard
Step 4: Generate the Secret Key for your application
You will need to create a Secret Key for your application, once this has been created its value will be hidden so save the value during creation
To create the Secret Key, select your application from the list, select the Settings within your application and then select the Keys option
There you can create a new key by adding the description and expiration period and the value will be generated
Step 5: Provide access to the subscription you wish to monitor
Navigate to the Subscriptions section and select the Subscription you selected before
In the Subscription to be monitored, click Access Control (IAM)
Then click the Add button, select Monitoring Contributor and select the application
If you are running more than one subscription these steps will need to be done for each one you wish to monitor
Setup and Configuration
Step 1: Add the Host Template
To configure and utilize this Opspack, you simply need to add the 'Cloud - Azure - Redis' Opspack to your Opsview Monitor system.
For more information, refer to Opsview Knowledge Center - Adding Host Templates to Hosts.
Step 2: Add and configure variables required for this host
Add 'AZURE_CREDENTIALS' to the host and set the Resource Group as its variable value, then override the Subscription ID, Client ID, Secret Key and Tenant ID to match the values retrieved earlier.
For more information, refer to Opsview Knowledge Center - Adding Variables to Hosts.