Tag: Public Cloud
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Restrict access to the IMDS endpoint on Azure Kubernetes Service with Cilium
In today’s blog post, we take a look at restricting access to the Azure IMDS endpoint on an Azure Kubernetes Service (AKS) cluster with Cilium using the BYOCNI approach. The Instance Metadata Service (IMDS) endpoint, also known as short IMDS, can be called directly from every Azure VM or VMSS instance via the following command.…
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How to restore a container image from an Azure Kubernetes Service node to an Azure Container Registry?
Imagine a specific version of your container image used for your application has been deleted from your Azure Container Registry. It cannot be restored for whatever reason through your CI/CD pipeline, and you still need this version. How can you restore that specific version when you still have a running pod on one of the…
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Kubernetes namespace exclusion options for Kyverno policies
During my preparation for the Kyverno Certified Associate exam, I hit an interesting part that I would like to talk about today. Which options do we have to exclude entire namespaces from Kyverno policies? Depending on what we want to achieve, we have three different options at hand to accomplish our goal. Option 1 –…
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Use an Azure Managed Identity for Fluent Bit’s Azure Data Explorer output plugin on Azure Kubernetes Service
The new Fluent Bit version 4 contains an interesting new feature for the Azure Data Explorer output plugin. Besides the standard option of using an Azure Service Principal for authentication, it now additionally supports an Azure Managed Identity for authentication. Azure_kusto (Output) azure managed identity support added (#10036) -> https://fluentbit.io/announcements/v4.0.0/ -> https://github.com/fluent/fluent-bit/pull/10036 Azure Managed Identities…
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Identifying values for the Azure Policy field parameter
In Azure, you can use Azure Policy with its field parameter to check for or enforce certain Azure resource configurations. For instance, the built-in policy “Allowed virtual machine size SKUs” uses the field parameter to restrict the available VM SKUs. This is especially useful for not accidentally provisioning very expensive VM SKUs like the ones…
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Azure Load Balancer Health Event Logs
In February, Microsoft announced the general availability of the Azure Load Balancer health event logs. -> https://azure.microsoft.com/en-us/updates?WT.mc_id=AZ-MVP-5000119&id=481818 Those health event logs are part of the diagnostic logs of an Azure Load Balancer As seen in the screenshot above, I have configured them on the Azure Load Balancer, part of my Azure Kubernetes Service cluster, and…