Cloud Native

Overview Cloud Native Security: Container Security, Image Scanning, and Runtime Protection is an essential skill in SRE operations. In production environments, mastering these techniques can significantly improve system stability and operational efficiency. Why Cloud Native Security Matters As systems grow in scale and complexity, traditional operations approaches struggle to meet the demands of modern distributed systems. Cloud Native Security helps operations teams: Rapid Problem Resolution: Systematic tools and methods reduce troubleshooting time Improved System Visibility: Establish comprehensive monitoring and observability Proactive Fault Prevention: Identify and fix potential risks before they cause outages Resource Optimization: Allocate and schedule resources efficiently Core Concepts and Principles Basic Concepts The core of Cloud Native Security lies in establishing standardized processes and automated toolchains....

Overview Kubernetes has become the standard runtime platform for cloud-native applications, but its elasticity and flexibility also bring significant cost management challenges. According to the Flexera 2024 State of the Cloud report, enterprises waste an average of 32% of their cloud spending, and resource waste in Kubernetes clusters is particularly pronounced — an ungoverned K8s cluster often has resource utilization below 30%. Kubernetes cost optimization is not a one-time configuration adjustment, but a systematic engineering effort spanning resource governance, autoscaling, instance type selection, and FinOps culture building....

Overview Prometheus is the de facto standard in the cloud-native monitoring space, but it has notable shortcomings in long-term data storage and global querying: local storage retains only 15 days of data by default, single instances cannot aggregate queries across clusters, and high-availability solutions are relatively complex. Thanos, a CNCF incubating project, achieves unlimited-capacity long-term storage by uploading Prometheus data to object storage (such as S3, GCS, MinIO) and provides a cross-cluster global view through distributed query components....

Overview As the de facto standard for cloud-native monitoring, Prometheus has become the default choice for microservice and Kubernetes monitoring. However, as business scale grows, Prometheus’s local storage architecture increasingly exposes significant bottlenecks: limited single-machine storage capacity (default 15-day retention), no native horizontal scaling, memory spikes under high-cardinality scenarios, and difficulty querying historical data. Many teams find themselves facing the “triple dilemma” of disk IO pressure, storage cost inflation, and query latency growth once time series exceed the million-level mark....