11/9/2023 0 Comments Pixia blog![]() ![]() The SSL cert should be securely sent to the satellite and the satellite’s proxy should be updated to use the new cert. When an satellite registers with the cloud, it should be assigned an unused SSL cert and associated subdomain.You should make sure to generate more SSL certs than the number of expected satellites. This step is easy to do with any free Certificate Authority and can be safely done if the subdomain has a well-known DNS address. ![]() Pre-generate SSL certs under a subdomain that you control, for instance.To solve this problem, we used the following solution: ![]() If your UI is running on a browser and your satellite is responding over HTTPS (likely with self-signed certs), you are not done yet.ĭiagram of SSL certification flow for Non-Passthrough Mode. In many cases, many cloud/distributed satellite architectures already communicate via heartbeats to track satellite state, so sending an additional address is no problem. Now, when the UI wants to make a request to a satellite, it first queries the cloud for the address, then directly makes the request to that address. The cloud records the satellite’s status and address so that it can be queried by the UI. Alternatively, the IP address could have been sent during registration, if it is not subject to change. In our case, we also attach the satellite’s IP address. Additional information can be sent in these heartbeats. During registration, the satellite either provides an identifier or is assigned an identifier via the cloud, which is used to identify the satellite in subsequent heartbeat messages.įollowing registration, the satellite begins sending periodic heartbeats to the cloud to indicate it is alive and healthy. This is typically done by having the satellite first send a registration message to the cloud. Making requests directly to the application in the clusterįor brevity, we will refer to the application running on the user’s cluster as a satellite.Ī common technique to track the status of a program is to establish a heartbeat sequence between the program (the satellite) and the monitoring system (the cloud).When building such a system, one challenge you may encounter is how to query data from an application running on the user’s cluster via a UI hosted in the cloud. However, designing a connected on-prem architecture is easier said than done. This architecture is still relatively uncommon in enterprise software, but has been adopted by popular products such as Harness, Streamsets, and Anthos. Although browser updates are infrequent, having the separated data and control layers allows developers to freely build a diverse set of applications on top of WebRTC. Similarly, WebRTC is a standard built into most modern browsers for handling voice and video data. For instance, despite these physical limitations, Ubiqiti’s UI is able to offer a rich feature-set by delegating functionality to their cloud and keeping their physical routers within the data plane. This split-responsibility architecture is common in many hardware products, since external factors may make it challenging to deploy updates to software running on physical devices. This allows the developer to iterate quickly on the functionality of their system, all while maintaining data locality on prem. As the cloud is managed by the developer themselves, they are freely able to perform updates without any dependency on the users. Meanwhile, a cloud-hosted system manages the core functionality and orchestration of the application. ![]() Once the foundation of this data layer is established, the logic remains mostly stable and is infrequently updated. More concretely, the application deployed in the user’s cluster is solely responsible for collecting data and making that data accessible. To address this problem, we propose a connected on-prem architecture which delegates the responsibility of managing the data and control planes of the application to the deployment running in the cluster and a developer-managed cloud environment, respectively. Diagram of a connected on-prem architecture. ![]()
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