fluxcd/flagger
Flagger
Flagger 是一个 Kubernetes 渐进式交付操作器，用于自动化新软件版本的逐步发布。它作为金丝雀发布管理器和流量切换器，与服务网格和 Ingress 控制器集成，以控制应用程序版本之间的请求分配。
该项目专注于通过实施金丝雀发布、蓝绿部署和 A/B 测试来降低生产风险。它利用基于指标的分析循环来监控请求成功率和持续时间，在不满足健康标准时自动提升版本或触发基于状态的回滚。
该工具通过基于 Webhook 的测试执行和合成负载测试提供额外的验证，以确保稳定性。它还包括用于手动发布门控、配置同步以及向外部通信提供商发送事件通知的机制。
该控制器使用标准包管理器部署到集群中，并针对支持的服务网格和 Ingress 控制器进行配置。
Features
- Progressive Delivery Strategies - Automates progressive delivery strategies, including canary and blue-green updates, to reduce production risk.
- A/B Testing - Performs A/B testing by splitting traffic between different versions to compare performance and user behavior.
- Blue-Green Deployments - Executes blue-green deployments by routing traffic between two identical environments to ensure version stability.
- Change Rollback Mechanisms - Automatically reverts traffic to the stable version when health metrics fail to meet required thresholds.
- Custom Resource Controllers - Provides a custom resource controller that monitors the Kubernetes API to automate progressive delivery workflows.
- Automated Rollout Managers - Manages application updates through incremental rollouts with automated rollback capabilities based on metric analysis.
- Deployment Strategies - Implements varied release patterns using weighted traffic, header-based routing, and traffic mirroring.
- Deployment Strategy Mappings - Implements a declarative system to map configuration files to specific deployment patterns like canary or blue-green.
- Automated Canary Analysis - Automates canary analysis by comparing real-time metrics against a stable baseline to decide on promotion.
- Automated Metric Analysis - Continuously compares real-time performance metrics between stable and canary versions to automate release decisions.
- Canary Release Managers - Acts as a canary release manager by gradually routing traffic and monitoring health to prevent outages.
- Kubernetes Operators - Implements the Kubernetes operator pattern using custom resources to automate progressive delivery workflows.
- Kubernetes Traffic Controllers - Integrates with service meshes and ingress controllers to automate network traffic routing within Kubernetes.
- Automated Release Validation - Provides automated promotion and rollback based on webhook-driven tests and real-time health metrics.
- Weighted Traffic Splitting - Updates service mesh and ingress configurations to incrementally shift request percentages between application versions.
- Release Health Monitoring - Monitors request success rates and durations to automatically promote or roll back releases based on health.
- Automated Test Execution - Executes automated test suites via webhooks during the rollout to verify delivery process stability.
- Release Quality Validation - Triggers external acceptance and load tests to ensure new versions meet established quality standards before full promotion.
- Workflow Approval Gates - Provides manual approval steps to pause or resume the promotion process for human oversight.
- Webhook Quality Gates - Triggers external HTTP endpoints to execute acceptance or load tests as quality gates during the rollout process.
- Rollout Approval Gates - Enables manual oversight of a release through a pause-and-resume approval mechanism for workload promotion.
- Synthetic Traffic Generators - Generates synthetic traffic against application versions to verify stability and performance during rollout.
- Kubernetes Ecosystem - Automates progressive delivery and canary deployments.
