Post by Project Sveltos

YAML-based filters cover the common case: match by label, match by field value. But real infrastructure has nuance — conditions that don't reduce to a single equality check. Sveltos supports two scripting languages for evaluation logic wherever conditions need to go beyond simple filters: 𝗟𝘂𝗮 and 𝗖𝗘𝗟 (Common Expression Language). 𝗟𝘂𝗮: 𝗳𝘂𝗹𝗹 𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗻𝗴 𝗳𝗼𝗿 𝗰𝗼𝗺𝗽𝗹𝗲𝘅 𝗰𝗼𝗻𝗱𝗶𝘁𝗶𝗼𝗻𝘀 An EventSource that fires only when a Service has a LoadBalancer type 𝗮𝗻𝗱 an external IP assigned. 𝗖𝗘𝗟: 𝗰𝗼𝗻𝗰𝗶𝘀𝗲 𝗲𝘅𝗽𝗿𝗲𝘀𝘀𝗶𝗼𝗻𝘀 𝗳𝗼𝗿 𝗿𝗲𝗮𝗱𝗮𝗯𝗹𝗲 𝗰𝗼𝗻𝗱𝗶𝘁𝗶𝗼𝗻𝘀 The same Lua evaluation context is used for health checks in 𝘷𝘢𝘭𝘪𝘥𝘢𝘵𝘦𝘏𝘦𝘢𝘭𝘵𝘩𝘴 — assess whether a Deployment is actually healthy by inspecting .𝘴𝘵𝘢𝘵𝘶𝘴.𝘤𝘰𝘯𝘥𝘪𝘵𝘪𝘰𝘯𝘴, not just .𝘴𝘵𝘢𝘵𝘶𝘴.𝘳𝘦𝘢𝘥𝘺𝘙𝘦𝘱𝘭𝘪𝘤𝘢𝘴. Multiple CEL expressions are ORed by default. CEL is Google's open standard — the same language used in Kubernetes admission policies (ValidatingAdmissionPolicy) and Argo's expression engine. Both languages run inside the Sveltos evaluation engine. No external webhook, no sidecar, no Lambda function. The logic ships with the resource definition. https://lnkd.in/dzP3RG88 #Kubernetes #MultiCluster #Lua #CEL #PlatformEngineering #PolicyAsCode