initial commit for security

README.md

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+# Topics
+
+## Structure
+
+ * Overview
+ * Operational excellence
+ * [Security](./Security.md) 
+ * Performance efficiency          
+ *  Cost optimization
+
 # Contributing
 
 This project welcomes contributions and suggestions.  Most contributions require you to agree to a

Security.md

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+# Guidelines for Securing Kubernetes on Azure
+
+This is intended as a guide on how to secure a production ready Kubernetes environment running on Azure.
+
+## What is this
+
+When it comes to securing your Kubernetes production environment in an enterprise, there are many tutorials and opinions that exist in the community.
+We strive to collect well founded concepts and help the reader to evaluate options and balance tradeoffs.
+
+Feedback welcome!
+
+    > To the editors: See this as a base line - comment on todos, feel free to add clearification on the structure and collect good source references for guidlines. 
+    > We should focus on parts that are azure specific on which we will contribute content and reference good content for Kubernetes specific topics.
+    > We will start the actual content once we have reviewed this and split the contribution of content.
+
+The severity or importance of each topic is indicated by an emoji in the topic name.
+
+* :boom: Critical
+* :fire: High
+* :cloud: Medium
+* :partly_sunny: Low
+
+## Structure
+
+    .
+    ├── Separating environments
+    ├── Securing a cluster
+    │   ├── Securing Endpoints
+    │   ├── Securing ServiceAccounts and Secrets
+    │   ├── Monitoring and Auditing of security relevant events
+    │   ├── Running Benchmarks and tests to validate cluster setup   
+    │   ├── Configuration best practices       
+    ├── Ensuring Authentication/ Authorization
+    │   ├── Configuring RBAC
+    │   │   ├── Users (Developers/ Administrators)
+    │   │   ├── Service Accounts
+    │   ├── Service Accounts
+    │   ├── Automating setup/ Maintenance tasks   
+    ├── Securing Workloads
+    │   ├── Secure Images and Admission Controller
+    │   ├── Pod Identities, Security Contexts and Pod Security Policies
+    │   ├── Network Segmentation
+    ├── Special Topics
+    │   ├── Private Clusters?
+    └── Links
+
+## Separating environments
+
+    > Concepts that can be applied to ensure security isolation for different workloads
+    > Separating Subscriptions, Resource Groups, Azure RBAC, Service Accounts and Secrets
+
+- [ ] Cluster vs Namespace isolation
+- [ ] Dedicated nodes / hyper-v isolation on Nodes
+- [ ] Azure service principals and MSI
+
+## Securing a cluster
+
+    > Understanding the cluster attack surface
+    > Securing Service Accounts and secrets
+    > Monitoring and securing security events and logs
+
+- [ ] Master Endpoint security in AKS / ACS-Engine
+- [ ] Evaluation of security benchbmarks like KubeBench / CSI
+- [ ] Security Impact of activating addons and dashboard
+
+
+## Ensuring Authentication/ Authorization
+
+    > Concepts that can be applied to configure and bootstrap authentication in azure
+    > Understanding Azure AD setup and the risk impact on security
+    > Minimizing the blast radius by applying least priviliges inside and outside the cluster
+
+- [ ] Azure AD Service Accounts and Groups
+- [ ] Maintaining Secrets
+
+## Securing Workloads
+
+    > Understanding the attack surface from container images and laying out Microsoft 1st party and ecosystem options
+    > Defining Pod security and ensuring minimal attack surface and good security default on apps
+    > Isolating ingoing and outgoing traffic and monitoring relevant behaviour
+
+- [ ] Image scanning in azure container registry and third party products like Twistlock, Neuvektor and Aqua
+- [ ] Ensuring adimission controllers on AKS / ACS-Engine
+- [ ] Capabilities of filtering network traffic with policies, azure firewall or network appliances
+
+## Links
+    > Good documentation that should be references