K8S Notes
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Container Orchestration
Container orchestration refers to the management and coordination of containers in a cloud-native environment. It involves tasks such as deploying, scaling, and maintaining containers to ensure the efficient and reliable operation of applications.
Challenges of container orchestration:
- Complexity: Orchestrating containers involves managing multiple containers across different hosts, which can be complex and require advanced skills.
- Scalability: As the number of containers increases, it becomes challenging to efficiently manage and scale them.
- Service Discovery: Containers need to discover and communicate with each other. Service discovery mechanisms are required to enable this communication.
- Fault Tolerance: Containers may fail or become unavailable. Container orchestration frameworks need to handle these failures and ensure the continuity of services.
Opportunities of container orchestration:
- Efficient Resource Utilization: Container orchestration allows for efficient utilization of infrastructure resources by dynamically allocating containers based on workload demands.
- Auto Scaling: Container orchestration enables automatic scaling of containers based on the workload, ensuring optimal resource allocation.
- High Availability: Container orchestration frameworks provide mechanisms for ensuring high availability by automatically recovering from failures and distributing workload across multiple containers.
- Rolling Updates: Container orchestration facilitates rolling updates, allowing for seamless deployment of new versions of applications without downtime.
Container orchestration has special requirements regarding networking and storage due to the distributed nature of containerized applications. Networking requirements include:
- Service Discovery: Container orchestration frameworks need to provide mechanisms for containers to discover and communicate with each other.
- Load Balancing: Load balancing mechanisms are required to distribute incoming traffic across containers and ensure optimal resource utilization.
- Network Isolation: Containers need to be isolated from each other to prevent interference and ensure security.
Regarding storage, container orchestration requires:
- Persistent Storage: Containers often require persistent storage for data that needs to persist across container restarts or migration.
- Volume Management: Container orchestration frameworks need to provide mechanisms for managing storage volumes and attaching them to containers.
- Data Replication: Data replication mechanisms may be needed to ensure data availability and durability across multiple containers or hosts.
Use of Containers
Container Basics
Running Containers
Building Container Images
Security
Container Orchestration Fundamentals
Networking
Service Discovery & DNS
Service Mesh
Storage
Additional Resources