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+---
+title: Building air-gapped control planes for a global pharma leader using crossplane and argo
+weight: 8
+tags:
+ - rejekts
+ - crossplae
+---
+
+<!-- {{% button href="https://youtu.be/rkteV6Mzjfs" style="warning" icon="video" %}}Watch talk on YouTube{{% /button %}} -->
+
+Joint effort of norvo-nordik and upbound.
+
+## Background
+
+- Ymir Platform: Foundational abstraction platform
+- Goal: Faster time to market
+- Usage in pharma: end-2-end compliance
+- Airgap: Use gitopt and prevent human interaction with the control planes
+
+## Setup
+
+- Decision for crossplane was obvious
+- Problem: Chicken and egg "we provision clusters via crossplane but crossplane needs a cluster"
+- GitOps: Everything as code with automatic tests and argo
+- Infra: Azure
+
+### Public AKS
+
+```mermaid
+graph LR
+    subgraph MC
+        ProviderAzure
+        ProviderKubernetes
+    end
+    ProviderAzure-->|Calls APU|AKS
+    AKS-->|Provisions|Kubernetescluster
+    ProviderKubernetes-->|Deploys service on|Kubernetescluster
+```
+
+### Bastion Bootstrap
+
+- Options: Terraform/Opentofu
+- Goal: Crossplane all the things
+- Solution: Run Crossplane in a github action
+  1. Kind Cluster
+  2. Install Crossplane
+  3. Propagete Credentials
+  4. Create Cluster
+- Tooling: Uptest - E2E Test automation Framework, can be used for bootstrapping since it creates kind cluster with crossplane
+
+```mermaid
+graph LR
+    subgraph GitHubRunner
+        Kubernetes
+        Crossplane
+    end
+    subgraph Azure
+        BastionVM
+    end
+    Crossplane-->|Create|BastionVM
+```
+
+### Next steps
+
+- Problem: How to access bastion
+- Solution: Auto-register bastion as github runner
+- Create Bastion-Cluster via Uptest
+
+```mermaid
+graph LR
+    subgraph Azure
+        subgraph BastionVM
+            GitHubRunner
+            Kubernetes
+            Crossplane
+        end
+        subgraph BastionCluster
+            Kubernetes
+            Argo
+            CrossPlane
+        end
+    end
+    Crossplane-->|Create|BastionCluster
+```
+
+TODO: Steal image from slides
+
+## Challenges
+
+- Argo sync waves:
+    - Problem: Argo does not support eventual consistency
+    - Example: Install a ProviderConfig before your Provider and sync fails without retry
+    - Order stuff very carefully
+- Delivering updates to private clusters
+    - Difference between public and private: It's the same package
+    - Upgrades/Downgrades: Change the package (Crossplane) and cluster (CRD)
+- Testing: 
+    - Static: Multiple stages and each stage has it's own bootstrap env that can be set to any branch
+    - Ephemeral: Uptest
+
+TODO: Steal images from slides
+
+
+## Wrap-up
+
+- Cloud native air-gapped ✅
+- GitOps ✅
+- Crossplane, no terraform ✅
+- Extensible, reusable, API-first ✅
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diff --git a/content/day-2/_index.md b/content/day-2/_index.md
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@@ -12,5 +12,10 @@ This is the first day of Cloud Native Rejekts and the first time of me attending
 
 - How to hire, manage and develop engineers: [Tech is broken and AI won't fix it](../05_broken-tech)
 - What if my homelab is an african island: [Geographically Distributed Clusters: Resilient Distributed Compute on the Edge](../06_geo-distributed-clusters)
+- Bootstrap and CI/CD with crossplane: [Building air-gapped control planes for a global pharma leader using crossplane and argo](../08_airgapped-cp)
 - Handling large number of clusters: [CRD Data Architecture for Multi-Cluster Kubernetes](../04_multicluster-crd)
-- Handling large scale migrations: [The Cluster API Migration Retrospective: Live migrating hundreds of clusters to Cluster API](../02_clusterapi) 
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+- Handling large scale migrations: [The Cluster API Migration Retrospective: Live migrating hundreds of clusters to Cluster API](../02_clusterapi) 
+
+## Other stuff I learned or people i talk to
+
+- Throughout the lunch break I talked to a nice guy who heared my government question during the [Tech is broken and AI won't fix it](../05_broken-tech)-Talk, we talked 
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