Thoughts from the clouds
You might have heard of the new AKS Gateway API, which will allow for much more functionality than the good, old ingress API that we all know and love. One of those features is the support for TCP routes, since although HTTP(S) is the king protocol in today’s world, there are still many applications out … Continue reading TCP Proxy with Istio on AKS
Certificate management is one of those IT disciplines that is nobody’s dream, and still it can have quite a dramatic (negative) impact in your web presence if not done properly, such as users being told by the browser that your site is not secure. Azure has a nice little tool to manage certificates and bring … Continue reading Get certificates with Azure Key Vault extension to your Linux VMs
After last week’s almost-philosophical post on network complexity, let’s move on to more mundane tasks. Today I will focus on how to write efficient Terraform code to connect private endpoints and DNS, without having to copy/paste literally hundreds of lines. First things first: what the heck am I talking about? Private endpoints are a way … Continue reading DRY Terraform code for Private Link and DNS
This question has been bothering me for quite some time now. Other technology areas constantly look to reduce complexity: take for example one of the most difficult fields out there, data science. Some years ago you needed a degree to even start with it, and now you can build and deploy models while sipping your … Continue reading Is Computer Networking too complex?
Monitoring is one of those underrated disciplines: everybody tells you to do it, but nobody tells you exactly how. As a consequence, there are many different approaches and few concrete recommendations. Before continuing, a word of caution: I am not going to cover introductory topics in this post. If you are not familiar with Virtual … Continue reading Monitoring Azure Networks with Alerts
If you are following the Azure Kubernetes Service space, I am sure you noticed that Azure CNI powered by Cilium is Generally Available. But is this a big thing? What does it mean for you? Well, yes, it is big indeed. It is like changing the wheels of your car to new ones: Cilium is … Continue reading Cilium Network Policy in AKS
Virtually every expert out there recommends following an Infrastructure-as-Code approach to manage Azure Networks, and even more so when dealing with traffic segmentation features such as firewall rulesets and network security groups (those tend to change more frequently than other resources). And yet, there is surprisingly little guidance on how to do so, and about … Continue reading Deploy (Azure) Network-as-Code as a champ
Today I was looking at IPvlan on a docker container in Azure along a colleague, and we found that there are plenty of documentation and blogs out there that might be confusing when running this setup on Azure. What is this IPvlan thing, I hear you ask? Docker has a good explanation here, but let … Continue reading IPvlan with Docker in Azure
Wow, that was a long title. Let me give you another one: if you haven’t tested your High Availability (HA) or Disaster Recovery (DR) plans, you shouldn’t rely on them. This is of course regardless of whether your infrastructure runs on your premises, on public cloud, or anywhere else. In this post I am going … Continue reading You want to use AS-path as your virtual hub routing preference
Update: as Srinivas describes in the comments, ingesting Flow Logs with Azure Data Explorer may lead to duplicate records. In every network you want to know what traffic is using it. Networking devices offer multiple options to report on traffic, such as Netflow, sFlow or IPFIX. However, these options are often not available in public … Continue reading Getting visibility into your Azure Traffic with NSG Flow Logs
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